Search

Search results for

1. Seasonal changes in above‐ground standing crop in three coastal grassland communities in Transkei¹

   Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: C.M. Shackleton --- Department of Botany, Transkei

   Above‐ground standing crop (ASC) dynamics were followed over a two‐year period in three coastal grassland communities. The mass of biomass, necromass and litter components was determined monthly from hand‐clipped samples and compared under three management treatments — grazing, burning and...

   View item »
2. 

   Canopy temperature as a plant water stress indicator for nectarines

   Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Helga Tormann --- ,

   Three-year-old nectarine trees of the cultivar Independence grown in free-drainage lysimeters were exposed to a wet and a dry treatment, i.e. high soil moisture content throughout or progressive soil drying respectively. The canopy temperature of the trees was measured with...

   View item »
3. 

   Invloed van tyd van ringelering op vruggrootte en rypwording van nektariens

   Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Hannelie Agenbag --- , Republiek van Suid-Afrika

   Voldraende Sunlite nektarienbome is in vyf produksie gebiede op 5, 6, 7, 8 en 9 weke na volblom geringeleer in 'n poging om ringelering se effek op vrugkwaliteit vas te stel. Alle ringeleerbehandelings het skynbaar tot groter vrugte gelei, maar...

   View item »
4. 

   Effect of blossom stage of ‘Alpine’ nectarine on efficacy of chemical thinning using Armothin

   Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.S. North --- Division of Horticulture, South Africa M. Booyse --- Biometry Unit, South Africa

   Fruit thinning of peach and nectarine cultivars is essential to maximize profitability and stabilize production and is routinely done by hand thinning of blossoms and early fruit. Chemical thinning of blossoms may reduce the cost of manual labour, but results...

   View item »
5. 

   The Role of Schools in Building the Resilience of Youth Faced with Adversity

   Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Bridget Johnson --- University of Western Cape, South Africa Sandy Lazarus --- University of Western Cape, South Africa

   This study explored factors related to risk, resilience and health amongst South African teenagers. Grade nine students (N = 472; males = 210, females = 262, age range = 12 to 18 years) at seven schools in the Western Cape...

   View item »
6. 

   Career-story Interviewing Using the Three Anecdotes Technique

   Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Jacobus G. Maree --- University of Pretoria,

   This article describes the value of using the Three Anecdotes Technique (TAT) during career-story interviewing. The TAT is a technique aimed at eliciting clients' three earliest memories to help counsellors identify clients' preoccupations and thereby support them to deal with...

   View item »
7. 

   Towards an Understanding of Nurturing and Restraining Relational Patterns in School Communities

   Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Ansie Elizabeth Kitching --- North-West University, Vera Roos --- North-West University, Ronel Ferreira --- University of Pretoria,

   This study aimed to understand the nature of nurturing and restraining relationships in a school communiy. The inquiry entailed a single instrumental case study of a selected school community in a semi-urban context in South Africa. Participants were learners (n=720),...

   View item »
8. 

   Connectedness classes

   Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: G. Castellini

   Let X be an (E,M)-category for sinks. A recently introduced notion of connectedness with respect to a closure operator C on X and to a class of X-monomorphisms N is further analyzed. The notion of N-connectedness hull of a class...

   View item »
9. 

   Closure Operator Constructions Depending On One Parameter

   Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: G. Castellini D. Holgate

   Let X be an (E , M)-category for sinks. For each subclass N of M, two new Galois connections that generalize the Clementino-Tholen connectedness and separation Galois connections are introduced. In particular, closure operator constructions that generalize the regular and...

   View item »
10. 

    A Pointfree Study of Bases For Spaces Of Minimal Prime Ideals

    Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Melvin Henriksen Joanne Walters-Wayland

    Let C (X) denote the ring of all real-valued continuous functions on a topological space X, and mX its space of minimal prime ideals with the hull-kernel topology. It has a base consisting of clopen sets and which contains the...

    View item »
11. 

    A Note on Locally Connected Compactifications of Frames

    Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: D. Baboolal

    Necessary and sufficient conditions are given for a completely regular frame to have a locally connected compactification.

    View item »
12. 

    D-connectedness

    Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Kim-Quang Tran

    The aim of this paper is to study the categorical topological notion of connectedness in terms of a rather arbitrary class of morphisms in a category. We propose a general approach to the notion both at the morphism and the...

    View item »
13. 

    The Galois Approach to Uniform Structures

    Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Maria João Ferreira Jorge Picado

    Entourages in uniform spaces, being binary relations, may be easily described by polarities (i.e. Galois connections between power sets) and axialities (i.e. residuated pairs between power sets). Here we consider this in the pointfree context of the category of frames,...

    View item »
14. 

    T ₁-separation in a category

    Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: G. Castellini

    A general notion of T 1-separation with respect to a closure operator is introduced in an arbitrary category. This is done by specializing a previously introduced diagram of Galois connections. This naturally yields a dual notion of T 1-coseparation. These...

    View item »
15. 

    Approach structures and measures of connectedness

    Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: David Holgate Mark Sioen

    Measures of connectedness versus disconnectedness are introduced in anarbitrary topological construct as fixed points of a Galois connection. This places measures of connectedness found in the literature in a general categorical frame-work.

    View item »
16. 

    SPREAD UNIFORMITIES AND UNIFORM SPREADS

    Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Hlengani Slweya --- Department of Mathematics, University of the North, Sovenga, South Africa,

    We discuss a point-free analog of the topological fact that every uniformly continuous function on a dense subspace of a uniform space into a complete uniform space has a unique uniformly continuous extension. It is shown that a uniform frame...

    View item »
17. 

    Almost Perfectly Continuous Functions

    Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: D. Singh --- Department of Mathematics, India

    The aim of the present paper is to continue the study of almost perfectly continuous (≡ regular set connected) functions initiated by Dontchev, Ganster and Reilly. It turns out that in general the notion of almost perfectly continuity is independent...

    View item »
18. 

    Interior Operators and Topological Connectedness

    Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: G. Castellini --- Department of Mathematical Sciences, U.S.A. J. Ramos --- Department of Mathematical Sciences, U.S.A.

    A categorical notion of interior operator is used in topology to define connectedness and disconnectedness with respect to an interior operator. A commutative diagram of Galois connections is used to show a relationship between these notions and Arhangelskii and Wiegandt's...

    View item »
19. 

    A metric property of Sierpiński hypercubes

    Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Heiko Hoffmann --- Department of Mathemactics, Germany

    In this short note we are engaged with sets we call generalized Sierpiński hypercubes. We give a detailed proof of the fact that these sets are uniformly regular, i.e., the geodesic metric is comparable to the Euclidean one.

    View item »
20. 

    Necessity and sufficiency in the aetiology of HIV/AIDS: The science, history and politics of the causal link

    Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Ulrike Kistner --- , South Africa

    An earlier version of this paper was presented at the AIDS in Context Conference, University of the Witwatersrand, Johannesburg, 4–7 April 2001

    View item »
21. 

    Sunbirds hover at flowers of Salvia and Lycium

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Petra Wester --- Department of Botany and Zoology, South Africa

    Sunbirds usually perch when visiting flowers for nectar and only rarely hover. Except for three studies of sunbirds visiting introduced plants in South Africa and India as well as a native plant in Cameroon, there have been no quantitative studies...

    View item »
22. 

    Vocal mimicry by sunbirds and the first record of mimicry by Dusky Sunbird Cinnyris fuscus

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Michael SL Mills --- AP Leventis Ornithological Research Institute, Nigeria

    Vocal mimicry is rarely observed among members of the Nectariniidae (sunbirds), with the only African species known to do so regularly being Socotra Sunbird Chalcomitra balfouri. Here I document and describe for the first time vocal mimicry by Dusky Sunbird...

    View item »
23. 

    Pigment profile and toxin composition during a red tide of Gymnodinium catenatum Graham and Myrionecta rubra (Lohman) Jankowski in coastal waters off Mar del Plata, Argentina

    Item type: Journal Article • Journal: African Journal of Marine Science • Authors: NG Montoya R Akselman MO Carignan JI Carreto

    Microscope observations of samples, collected in autumn 2003 during a red tide in the coastal waters of Mar del Plata, Argentina, suggest that the phytoplankton community consisted mainly of the chain-forming dinoflagellate Gymnodinium catenatum (89 000 cells l−1). However, the...

    View item »
24. 

    Feeding and ecomorphology of seven flatfish species in the North-North-West Aegean Sea, Greece

    Item type: Journal Article • Journal: African Journal of Marine Science • Authors: PK Karachle --- Laboratory of Ichthyology, Department of Zoology, Greece KI Stergiou

    The diet composition and possible relationships between mouth area and intestine length with feeding were investigated for seven flatfish species in the North-North-West Aegean Sea. Samples were obtained from commercial fisheries (trawls and gillnets) on a seasonal basis, and a...

    View item »
25. 

    Allozyme and mtDNA variation of white seabream Diplodus sargus populations in a transition area between western and eastern Mediterranean basins (Siculo-Tunisian Strait)

    Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Kaouèche --- Unité de Recherche de Biologie, Ecologie et Parasitologie des Organismes Aquatiques, Tunis L Bahri-Sfar --- Unité de Recherche de Biologie, Ecologie et Parasitologie des Organismes Aquatiques, Tunis M González-Wangüemert --- Departamento de Ecología e Hidrología, Facultad de Biología, Spain Á Pérez-Ruzafa --- Departamento de Ecología e Hidrología, Facultad de Biología, Spain OK Ben Hassine --- Unité de Recherche de Biologie, Ecologie et Parasitologie des Organismes Aquatiques, Tunis

    To investigate the possible influence of the Siculo-Tunisian Strait on the genetic structure of white seabream Diplodus sargus, 13 polymorphic allozyme loci and a fragment of the cytochrome b mito-chondrial DNA were analysed. Allozyme data indicated a moderate but significant...

    View item »
26. 

    High-latitude connectivity of the scleractinian coral Acropora tenuis in the south-western Indian Ocean, identified using nuclear intron and mitochondrial sequence data

    Item type: Journal Article • Journal: African Journal of Marine Science • Authors: B Chiazzari --- School of Life Sciences, South Africa A Macdonald --- School of Life Sciences, South Africa M Schleyer --- , South Africa

    All scleractinian corals in southern Africa occupy the high-latitude margins of their biogeographical range, with some straddling multiple biogeographical regions. Connectivity among these populations is essential to maintain genetic diversity, and thus their conservation value. Therefore, the aim of this...

    View item »
27. 

    Shallow-water, nearshore current dynamics in Algoa Bay, South Africa, with notes on the implications for larval fish dispersal

    Item type: Journal Article • Journal: African Journal of Marine Science • Authors: P Pattrick --- Department of Ichthyology and Fisheries Science, South Africa NA Strydom --- , South Africa WS Goschen --- , South Africa

    Nearshore currents play a vital role in the transport of eggs and larval stages of fish. However, little is known about their complexity and the implications for dispersal of fish larvae. The study describes the complexity of the shallow nearshore...

    View item »
28. 

    Why do we need to integrate population genetics into South African marine protected area planning?

    Item type: Journal Article • Journal: African Journal of Marine Science • Authors: S von der Heyden --- Evolutionary Genomics Group, Department of Botany and Zoology, South Africa

    South Africa is home to a wide variety of marine flora and fauna distributed over at least three biogeo-graphic provinces. Currently, 9% of the coastline is protected by ‘no-take’ marine protected areas (MPAs), but the distribution of MPAs is uneven...

    View item »
29. 

    Recent population estimates and trends in numbers of albatrosses and giant petrels breeding at the sub-Antarctic Prince Edward Islands

    Item type: Journal Article • Journal: African Journal of Marine Science • Authors: PG Ryan --- , South Africa MGW Jones --- , South Africa BM Dyer --- Department of Environmental Affairs, South Africa L Upfold --- Department of Environmental Affairs, South Africa RJM Crawford --- Department of Environmental Affairs, South Africa

    The second mid-summer survey of surface-nesting seabirds at the Prince Edward Island group (Marion and Prince Edward islands) was conducted during December 2008, seven years after the initial mid-summer survey. Wandering albatrosses Diomedea exulans may have decreased slightly at Prince...

    View item »
30. 

    Discrete Objects, Splitting Closure and Connectedness

    Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Gabriele Castellini

    Notions of discrete and indiscrete classes with respect to a closure operator are introduced and studied. These notions are strongly related to splitting and cosplitting closure operators. By linking the above concepts, two Galois connections arise whose composition provides a...

    View item »
31. 

    Oz in pointfree topology

    Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Bernhard Banaschewski Themba Dube Christopher Gilmour Joanne Walters-Wayland

    Oz frames are the natural pointfree counterpart of Oz spaces, that is, those topological spaces in which every open set is z-embedded. We give here the point-free analogues of known characterisations of Oz spaces and show that the Lindelöf coreflection...

    View item »
32. 

    Why is there Philosophy of Mathematics AT ALL?

    Item type: Journal Article • Journal: South African Journal of Philosophy • Authors: Ian Hacking --- Collège de France and University of Toronto,

    Mathematics plays an inordinate role in the work of many of famous Western philosophers, from the time of Plato, through Husserl and Wittgenstein, and even to the present. Why? This paper points to the experience of learning or making mathematics,...

    View item »
33. 

    Stable isotope evidence of food web connectivity by a top predatory fish (Argyrosomus japonicus: Sciaenidae: Teleostei) in the Kowie Estuary, South Africa

    Item type: Journal Article • Journal: African Journal of Marine Science • Authors: L Bergamino --- Department of Zoology and Entomology, South Africa T Dalu --- Department of Zoology and Entomology, South Africa AK Whitfield --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa L Carassou --- Department of Zoology and Entomology, South Africa NB Richoux --- Department of Zoology and Entomology, South Africa

    In this study, food web connectivity within the Kowie Estuary on the south-east coast of South Africa was evidenced by the trophic behaviour of the predominantly piscivorous Argyrosomus japonicus. We examined stable isotopes of carbon (δ13C) and nitrogen (δ15N) in...

    View item »
34. 

    Nectar feeding by weavers (Ploceidae) and their role as pollinators

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Adrian JFK Craig --- Department of Zoology and Entomology, South Africa

    Reviews of nectar-feeding by birds initially focused on specialist nectarivores and ignored the role that more generalist feeders may play in plant pollination. Recent work has emphasised the range of bird species, both specialist and opportunistic, that feed on nectar...

    View item »
35. 

    Bush encroachment in southern Africa: changes and causes

    Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Tim G O'Connor --- South African Environmental Observation Network (SAEON), South Africa James R Puttick --- Plant Conservation Unit, Department of Biological Sciences, South Africa M Timm Hoffman --- Plant Conservation Unit, Department of Biological Sciences, South Africa

    Bush encroachment has been recognised in southern Africa since the late nineteenth century. Our review of 23 studies showed that the rate of woody cover change has ranged from −0.131 to 1.275% y−1. Encroachment was most rapid on small protected...

    View item »
36. 

    Differences in MetS marker prevalence between black African and Caucasian teachers from the North West Province: Sympathetic Activity and Ambulatory Blood Pressure in Africans (SABPA) Study

    Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: S Hoebel --- The School of Biokinetics, Recreation and Sport Science, North-West University, L Malan --- School for Physiology, Nutrition and Consumer Sciences, North-West University, H De Ridder --- School of Biokinetics, Recreation and Sport Science, North-West University,

    Background: The aim of this study was to compare metabolic syndrome (MetS) prevalence between black and Caucasian Africans using different definitions, and secondly, to determine the association between MetS, anthropometric markers and the albumin: creatinine ratio using the new joint...

    View item »
37. 

    Human immunodeficiency virus and the airway

    Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: Analee Milner --- University of the Witwatersrand,

    Seventy-five to one hundred per cent of patients with human immunodeficiency virus (HIV)/acquired immune deficiency syndrome (AIDS) have a head and neck manifestation. These manifestations may impact on anaesthetic management, but more importantly often allow the anaesthetist to diagnose the...

    View item »
38. 

    Anaesthetic management of a rare variety of cardiac myxoma for emergency decompression laminectomy

    Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: S Yemul-Golhar --- Department of Anaesthesia, India S Shinde --- Department of Anaesthesia, India K Kelkar --- Department of Anaesthesia, India

    Primary cardiac tumours are rare. Right ventricular myxomas and a combination of right atrial and ventricular myxomas are very rare. A patient with myxoma has several problems, including haemodynamic compromise in a particular position, embolisation and hypoxaemia because of low...

    View item »
39. 

    Review of common cutaneous adverse drug reactions

    Item type: Journal Article • Journal: South African Family Practice • Authors: MH Motswaledi --- Department of Dermatology,

    View item »
40. 

    Common work-related musculoskeletal strains and injuries

    Item type: Journal Article • Journal: South African Family Practice • Authors: RM Collins --- Section Sports Medicine, DC Janse Van Rensburg --- Section Sports Medicine, JS Patricios --- Section Sports Medicine,

    Muscles, tendons, joints and nerves are susceptible to injury when stressed or traumatised repetitively, or over an extended period of time. Regardless of the nature of the work, a large proportion of the working population's time is spent engaged in...

    View item »
41. 

    ‘Mum never loved me.’ How structural factors influence adolescent sexual and reproductive health through parent–child connectedness: A qualitative study in rural Tanzania

    Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Joyce Wamoyi --- National Institute for Medical Research, Tanzania Daniel Wight --- Medical Research Council, UK

    Research in high income countries shows parent–child connectedness to be protective against undesirable sexual and reproductive health (SRH) outcomes among young people. Little has been done to understand the nature of parent–child connectedness, the structural factors that impact on connectedness...

    View item »
42. 

    Meaning as inter-connectedness: theoretical perspectives and empirical evidence

    Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Antonella Delle Fave --- Department of Pathophysiology and Transplantation, Italy Lawrence Soosai-Nathan --- Anugraha Institute of Social Sciences, India

    Researchers interested in the study of eudaimonic well-being have devoted increasing efforts in the attempt to define and understand meaning as a core resource fostering human development and successful adaptation to environmental demands. Conceptual models and empirical findings highlighted the...

    View item »
43. 

    Meaning and relational well-being: a reflection on the state of the art and a way forward

    Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Marié P. Wissing [cor1]

    This paper provides a brief overview of facets of meaning and relational well-being highlighting the foci of current research on meaning, relationships as sources of meaning, contextual relevance and meta-theoretical assumptions. Lacunae in knowledge are indicated and a model proposed...

    View item »
44. 

    Sports contribution to open communication in a workplace: a qualitative study

    Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Yvonne T. Joubert --- University of South Africa,

    This study explored employees’ perceptions of the contribution that conversations about sport have on workplace social bonding. Participants were 63 sport participants from nine different financial organisations in the Gauteng region of South Africa (33% were female and 67% were...

    View item »
45. 

    Exploring personality preferences in relation to psychological career resources among managerial staff in the Western Cape fast food industry

    Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Melinde Coetzee --- Department of Industrial and Organisational Psychology, Dries Schreuder --- Department of Industrial and Organisational Psychology, Chris Kotze --- Department of Industrial and Organisational Psychology,

    The study explored the relationship between individuals' personality preferences (as measured by the Myers-Briggs Type Indicator, Form M) and their psychological career resources (as measured by the Psychological Career Resources Inventory) and whether the personality types differed significantly in terms...

    View item »
46. 

    Bee food: the chemistry and nutritional value of nectar, pollen and mixtures of the two

    Item type: Journal Article • Journal: African Zoology • Authors: Susan W. Nicolson --- Department of Zoology and Entomology, South Africa

    Bees are herbivorous insects, consuming nectar and pollen throughout their life cycles. This paper is a brief review of the chemistry of these two floral resources and the implications for bee nutrition. Nectar is primarily an energy source, but in...

    View item »
47. 

    Blood plasma glucose regulation in Wahlberg’s epauletted fruit bat

    Item type: Journal Article • Journal: African Zoology • Authors: Babalwa R. Mqokeli --- School of Life Sciences, University of KwaZulu-Natal, South Africa Colleen T. Downs --- School of Life Sciences, University of KwaZulu-Natal, South Africa

    Frugivores feed on fruits and nectars that contain different types of sugars in different proportions, which provide these animals with energy. Wahlberg’s epauletted fruit bat (Epomophorus wahlbergi) has a high glucose intake irrespective of sugar concentration of nectar. It is...

    View item »
48. 

    Interference competition between sunbirds and carpenter bees for the nectar of Hypoestes aristata

    Item type: Journal Article • Journal: African Zoology • Authors: Robert Tropek --- Institute of Entomology, Biology Centre, Czech Academy of Sciences, Czech Republic Michael Bartoš --- University of South Bohemia, Czech Republic Eliška Padyšáková --- University of South Bohemia, Czech Republic Štěpán Janeček --- Academy of Sciences of the Czech Republic, Czech Republic

    Interference competition for nectar sources has been repeatedly described between hummingbirds and various insects, but rarely recorded in other nectari-vorous birds. We observed aggressive behaviour by African sunbirds (Cinnyris reichenowi and Cinnyris bouvieri) defending the nectar plant Hypoestes aristata against...

    View item »
49. 

    Sugar type and concentration preference of the Cape white-eye, Zosterops virens

    Item type: Journal Article • Journal: African Zoology • Authors: Minke Witteveen --- University of KwaZulu-Natal, South Africa Mark Brown --- University of KwaZulu-Natal, South Africa

    Differences in nectar characteristics of bird-pollinated plants were originally attributed to whether the plant was pollinated by non-passerine hummingbirds or passerine nectarivores. Subsequently this has been refuted and it is now hypothesized that these differences reflect whether the plants are...

    View item »
50. 

    Indigenizing counselling valuing the afterlife with the Igbo of south eastern Nigeria: a case for ino-uwa based intervention

    Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Chika Eze --- Department of Psychology, Faculty of Education, Kenya

    This study examines prospects for the utilization of the concept of ino-uwa practised by the Igbo cultural-linguistic community of South Eastern Nigeria to understand and address counselling needs of a child and his family. Ino-uwa is the cultural familial scaffold...

    View item »
51. 

    Anaesthesia for a patient with beta thalassaemia major

    Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: T Kallenbach --- Department of Anaesthesia, South Africa

    While beta thalassaemia is not a common disorder with an estimated 100 000 severely affected individuals worldwide, improved survival rates and increased global migration means an increased frequency of such patients being seen for various surgeries. The different aspects of this...

    View item »
52. 

    Inferring the links between breeding and wintering grounds in a Palearctic– African migratory bird, the Great Reed Warbler, using mitochondrial DNA data

    Item type: Journal Article • Journal: African Zoology • Authors: Naglaa El-Arabany --- Department of Biology, Sweden Marjorie Sorensen --- Department of Zoology, UK Bengt Hansson --- Department of Biology, Sweden

    Understanding spatial connections between breeding and wintering populations is critical for developing sound conservation plans in migratory animals. However, for long-distance migratory songbird species wintering in sub-Saharan Africa, many of which are in a state of population decline, information on...

    View item »
53. 

    A review of fiddler crabs (genus Uca Leach, 1814) in South Africa

    Item type: Journal Article • Journal: African Zoology • Authors: Nasreen Peer --- DST/NRF Research Chair in Shallow Water Ecosystems, South Africa Nelson AF Miranda --- DST/NRF Research Chair in Shallow Water Ecosystems, South Africa Renzo Perissinotto --- DST/NRF Research Chair in Shallow Water Ecosystems, South Africa

    Fiddler crabs occur globally across tropical and subtropical coastal habitats including mangrove swamps, which are in decline worldwide. The genus has been well-studied in the Americas, Australia and Asia, whereas information on African species is scarce. This review summarises the...

    View item »
54. 

    Prolonged survival after laparoscopic splenectomy for recurrent ovarian cancer and no adjuvant therapy: a report and review of the literature

    Item type: Journal Article • Journal: Southern African Journal of Gynaecological Oncology • Authors: F Marriqoun-Harris --- The Sydney Gynaecologic Oncology Group, Sydney Cancer Centre, Royal Prince Alfred Hospital, Y J J Rhou --- The Sydney Gynaecologic Oncology Group, Sydney Cancer Centre, Royal Prince Alfred Hospital, D Storey --- The University Of Sydney, Australia S Pather --- The Sydney Gynaecologic Oncology Group, Sydney Cancer Centre, Royal Prince Alfred Hospital,

    View item »
55. 

    Nocturnal pectoral tuft display in the malachite sunbird

    Item type: Journal Article • Journal: African Zoology • Authors: Andrea E. Wellmann --- School of Biological and Conservation Sciences, South Africa Colleen T. Downs --- School of Biological and Conservation Sciences, South Africa

    Diurnal birds generally sleep during the hours of darkness. Most male southern African sunbirds have pectoral tufts, although the function of these is not always understood. We examined nocturnal tuft display in male malachite sunbirds (Nectarinia famosa) and found that...

    View item »
56. 

    The role of waterbirds in the dispersal of freshwater cladocera and bryozoa in southern Africa

    Item type: Journal Article • Journal: African Zoology • Authors: Chevonne Reynolds --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South Africa Graeme S Cumming --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South Africa

    It has long been presumed that waterbirds disperse the propagules of aquatic organisms. However, it is only in recent years that this claim has been empirically explored and little is still known about waterbird-mediated dispersal in southern Africa. Aquatic invertebrates...

    View item »
57. 

    Biophysical models of larval dispersal in the Benguela Current ecosystem

    Item type: Journal Article • Journal: African Journal of Marine Science • Authors: C Lett --- UMI IRD 209 UPMC UMMISCO, Centre de Recherche Halieutique Méditerranéenne et Tropicale, France CD van der Lingen --- Branch: Fisheries Management, Department of Agriculture, Forestry and Fisheries, South Africa BR Loveday --- Remote Sensing Group, Plymouth Marine Laboratory, UK CL Moloney --- Marine Research Institute and Department of Biological Sciences, South Africa

    We synthesise and update results from the suite of biophysical, larval-dispersal models developed in the Benguela Current ecosystem. Biophysical models of larval dispersal use outputs of physical hydrodynamic models as inputs to individual-based models in which biological processes acting during...

    View item »
58. 

    Histopathological biomarkers and genotoxicity in gill and liver tissues of Nile tilapia Oreochromis niloticus from a polluted part of the Nile River, Egypt

    Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: AA Baiomy --- Zoology Department, Egypt

    Fish health is affected by water pollution. Oreochromis niloticus collected during summer 2014 from El-Serw, a polluted site on the Nile River, were compared with fish from a reference site, El-Zamalek. Histopathological changes were detected in gill and liver tissue...

    View item »
59. 

    α-Baer rings and some related concepts via C(X)

    Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: A.R. Aliabad --- , , Iran A. Taherifar --- , , Iran N. Tayarzadeh --- , , Iran

    We call a commutative ring R an F IN -ring (resp., F SA-ring) if for any two finitely generated I, J ⊴R we have Ann(I)+Ann(J )=Ann(I∩J ) (resp., there is K ⊴ R such that Ann(I)+Ann(J )=Ann(K)). Moreover, we extend...

    View item »
60. 

    Nutrition in paediatric Crohn’s disease

    Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: O. Goulet --- Department of Pediatric Gastroenterology, Hepatology and Nutrition, France

    Inflammatory bowel disease (IBD) such as Crohn’s disease (CD) results from the interaction between an individual’s immune response and precipitant environmental factors, which generate an anomalous chronic inflammatory response in those who are genetically predisposed. Protein-energy malnutrition (PEM) is a...

    View item »
61. 

    Adiponectin could be a comprehensive marker of metabolic syndrome in obese children

    Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: H. Atwa --- Department of Pediatrics, B. Mesbah --- Department of Pediatrics, A. Sad --- Department of Pediatrics,

    Objectives: The objectives were to investigate the relationship between the serum adiponectin level and the metabolic syndrome (MS) phenotype in children, and to examine the independent association between the serum adiponectin level and the individual components of MS.

    View item »
62. 

    The role of human milk oligosaccharides in preventing necrotising enterocolitis and human immunodeficiency virus transmission

    Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: E. Van Niekerk --- Division Human Nutrition, R. Blaauw --- Division Human Nutrition, Gf Kirsten --- Department of Paediatrics and Child Health, Division of Neonatology,

    The heavy burden of maternal human immunodeficiency virus (HIV) infection has resulted in a high prevalence of premature births, with an associated increase in the incidence of necrotising enterocolitis (NEC). NEC is a life-threatening inflammatory disease of the gastrointestinal tract...

    View item »
63. 

    Current distribution, breeding population and habitat use of the globally threatened Grey-necked Picathartes Picathartes oreas in south-eastern Nigeria: a call for conservation action

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Fidelis Akunke Atuo --- Department of Natural Resource Ecology and Management, USA Samuel T Ivande --- AP Leventis Ornithological Research Institute (APLORI), Nigeria Zingfa J Wala --- AP Leventis Ornithological Research Institute (APLORI), Nigeria Shiiwa Manu --- AP Leventis Ornithological Research Institute (APLORI), Nigeria Timothy J O’Connell --- Department of Natural Resource Ecology and Management, USA

    The Grey-necked Picathartes Picathartes oreas is a globally threatened bird species in Africa with a wild population of less than 10,000 individuals. The Nigerian population, which has been poorly studied, is restricted to the forest of Cross River. This study...

    View item »
64. 

    Diseases of eucalypts in the central and northern provinces of Mozambique

    Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Sílvia ND Maússe-Sitoe --- Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), South Africa ShuaiFei Chen --- Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), South Africa Michael J Wingfield --- Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), South Africa Jolanda Roux --- Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), South Africa

    In the mid-1970s, Mozambique embarked on several forestry projects to promote and establish large plantation areas with eucalypt trees. The planted species included Corymbia citriodora, Eucalyptus camaldulensis, E. saligna and E. tereticornis. Similar to other regions of the world, pests...

    View item »
65. 

    The nutritional management of short bowel syndrome in a very low-birthweight neonate

    Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Lize Rossouw --- Chief Dietician, Elizabeth van der Merwe [cor1]

    View item »
66. 

    A system-level modelling perspective of the KwaZulu-Natal Bight ecosystem, eastern South Africa

    Item type: Journal Article • Journal: African Journal of Marine Science • Authors: UM Scharler --- School of Life Sciences, South Africa RC van Ballegooyen --- Coastal Systems Research Group, South Africa MJ Ayers --- School of Life Sciences, South Africa

    The KwaZulu-Natal Bight comprises the only sizeable shelf region on the eastern coast of South Africa, and is influenced by both the Agulhas Current on its seaward side and rivers and estuaries on its landward side. Established knowledge of the...

    View item »
67. 

    Otolith shape as a valuable tool to evaluate the stock structure of swordfish Xiphias gladius in the Indian Ocean

    Item type: Journal Article • Journal: African Journal of Marine Science • Authors: K Mahé --- Ifremer, Laboratoire Ressources Halieutiques, France H Evano --- Ifremer, Délégation Océan Indien, France T Mille --- Ifremer, Laboratoire Ressources Halieutiques, France D Muths --- Université Européenne de Bretagne, France J Bourjea --- , France

    Swordfish Xiphias gladius is an oceanic-pelagic species. Its population structure in the Western Indian Ocean was studied from the shape of the sagittal otoliths of 391 individuals collected from 2009 to 2014. Normalised elliptical Fourier descriptors (EFDs) were extracted automatically...

    View item »
68. 

    Characterisation of microsatellite markers in the Spotted Sand Lizard (Pedioplanis lineoocellata) shows low levels of inbreeding and moderate genetic diversity on a small spatial scale

    Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Krystal A. Tolley --- , , South Africa Ryan J. Daniels --- , , South Africa Kevin A. Feldheim --- , , USA

    Population genetic methods can be useful for understanding spatial genetic patterns, gene flow and diversity. While genetic markers such as gene sequences are useful for understanding broad scale phylogeographic patterns, microsatellite markers allow for inferences within species and on smaller...

    View item »
69. 

    Analysis of genetic diversity in Rose’s mountain toadlet (Capensibufo rosei) using novel microsatellite markers

    Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Jessica M. da Silva --- , South Africa Kevin A. Feldheim --- , USA Ryan J. Daniels --- , South Africa Shelley Edwards --- , South Africa Krystal A. Tolley --- , South Africa

    On the Cape Peninsula, Capensibufo rosei is known from only two isolated breeding populations within Table Mountain National Park. Because of its declining state, there is an urgent need to understand the genetic diversity, population structure and patterns of movement...

    View item »
70. 

    A New Struggle: Active Citizenship in Thembi Ngubane and the Bambanani Women’s Group’s HIV/AIDS Narratives

    Item type: Journal Article • Journal: Eastern African Literary and Cultural Studies • Authors: Savannah Hall --- Department of English, United States of America

    This article discusses South African women’s narrative and artistic responses to the HIV/AIDS epidemic, to include Thembi Ngubane’s radio broadcast “Out of hiding, into the world: Thembi’s AIDS Diary” and the Bambanani Women’s Group’s collection Long Life … Positive HIV Stories. Produced...

    View item »
71. 

    The relationship between obesity, leptin, adiponectin and the components of metabolic syndrome in urban African women, Free State, South Africa

    Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Sanet van Zyl --- Faculty of Health Sciences, Department of Basic Medical Sciences, South Africa Lynette J van der Merwe --- Faculty of Health Sciences, Department of Basic Medical Sciences, South Africa Francois C van Rooyen --- Faculty of Health Sciences, Department of Biostatistics, South Africa Gina Joubert --- Faculty of Health Sciences, Department of Biostatistics, South Africa Corinna M Walsh --- Faculty of Health Sciences, Department of Nutrition and Dietetics, South Africa

    Objectives: Obesity prevalence is increasing worldwide. In South Africa, older and urbanised African women have significantly higher rates of obesity. Limited information is available on the relationship between anthropometric parameters, adipokines and metabolic health status of African women. This study...

    View item »
72. 

    Cortisol stress response and histopathological alteration index in Clarias gariepinus exposed to sublethal concentrations of Qua Iboe crude oil and rig wash

    Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: JK Saliu --- Ecotoxicology Unit, Department of Zoology, Nigeria SA Oluberu --- Ecotoxicology Unit, Department of Zoology, Nigeria II Akpoke --- Ecotoxicology Unit, Department of Zoology, Nigeria UD Ukwa --- Ecotoxicology Unit, Department of Zoology, Nigeria

    The histological effect on and stress response of post juvenile Clarias gariepinus exposed to Qua Iboe crude oil and rig wash were investigated. Fish weighing 60–90 g and measuring 16–18 cm were exposed for 7–28 days to 8.00 ml−1 Qua...

    View item »
73. 

    Visitors to nests of Hooded Vultures Necrosyrtes monachus in northeastern South Africa

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Lindy J Thompson --- School of Life Sciences, South Africa John P Davies --- Lawson’s Birding, Wildlife and Custom Safaris, South Africa Maja Gudehus --- Selati Private Game Reserve, South Africa André J Botha --- Endangered Wildlife Trust, South Africa Keith L Bildstein --- Acopian Centre for Conservation Learning, Hawk Mountain Sanctuary, USA Campbell Murn --- Hawk Conservancy Trust, UK Colleen T Downs --- School of Life Sciences, South Africa

    Hooded Vultures Necrosyrtes monachus are critically endangered but little is known of their year-round use of nests or whether other species usurp Hooded Vulture nest sites. We investigated visitation rates by Hooded Vultures and other species (including potential nest predators...

    View item »
74. 

    The decline of an urban Hooded Vulture Necrosyrtes monachus population in Dakar, Senegal, over 50 years

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Wim C Mullié --- , Senegal François-Xavier Couzi --- Société d’Etudes Ornithologiques de la Réunion, France Moussa Sega Diop --- AfriWet Consultants, Senegal Bram Piot --- Cité Ndiatte Almadies, Senegal Theo Peters --- Royal Netherlands Embassy, Senegal Pierre A Reynaud --- 275 Rue Robert Schuman, France Jean-Marc Thiollay --- 2 Rue de la Rivière, France

    As in many West African cities, in Dakar Hooded Vultures Necrosyrtes monachus have always been characteristic urban scavengers. The recent decline of Hooded Vultures in other parts of Africa, mainly eastern Africa, has been the reason in 2015 for up-listing...

    View item »
75. 

    Health effects in fish from the polluted Orlando Dam and Klipspruit wetland system, Soweto, South Africa

    Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: TS Bengu --- Department of Geography, South Africa J du Plessis --- Department of Zoology, South Africa LS Modley --- Department of Geography, South Africa JC van Dyk --- Department of Zoology, South Africa

    Pollution of aquatic ecosystems often results in adverse environmental disturbances, including physiological and/ or histomorphological changes in fish. The health of Clarias gariepinus sampled from two polluted water bodies, Orlando Dam and a pond in the Klipspruit wetland catchment, Soweto,...

    View item »
76. 

    The ‘suitcase hypothesis’: Can entrainment of meroplankton by eddies provide a pathway for gene flow between Madagascar and KwaZulu-Natal, South Africa?

    Item type: Journal Article • Journal: African Journal of Marine Science • Authors: S Ockhuis --- Cape Peninsula University of Technology, South Africa JA Huggett --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa G Gouws --- African Coelacanth Ecosystem Programme (ACEP), South Africa C Sparks --- Cape Peninsula University of Technology, South Africa

    Similarities in the marine fauna found off the coasts of southern Madagascar and KwaZulu-Natal Province (KZN), South Africa, led to the development of the ‘suitcase project,’ with the aim of establishing whether eddies that form off southern Madagascar may package...

    View item »
77. 

    Nightjar diversity and microhabitat use in Nechisar National Park, Ethiopia

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Ruben Evens --- Research Group Zoology: Biodiversity and Toxicology, Belgium Natalie Beenaerts --- Research Group: Environmental Biology, Belgium Nele Witters --- Research Group: Environmental Economics, Belgium Tom Artois --- Research Group Zoology: Biodiversity and Toxicology, Belgium

    Knowledge of the distribution and ecology of East African nightjars is, to a large extent, unknown. We collected ecological information on the diversity and microhabitat use of nightjars in Nechisar National Park in January 2015 by executing field captures and...

    View item »
78. 

    Hooded Vultures Necrosyrtes monachus nearly extirpated from Edo State, Nigeria: a report on the avian scavenger community

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Esther Nosazeogie --- AP Leventis Ornithological Research Institute, University of Jos, Nigeria Talatu Tende --- AP Leventis Ornithological Research Institute, University of Jos, Nigeria Ara Monadjem --- Department of Biological Sciences, Swaziland

    Avian scavengers, by feeding on carrion and other organic matter, provide critical ecosystem services. Vultures, the only obligate avian scavengers, have reportedly experienced massive population declines in Africa yet current knowledge regarding their status in most West African countries is...

    View item »
79. 

    Inheritance of fruit neck, rind and seed coat hardness, and seed coat colour in bottle gourd

    Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Nogbou F Amangoua --- UFR des Sciences de la Nature, Breeding and Crop Husbandry Unit, Côte d’Ivoire Kouamé K Koffi --- UFR des Sciences de la Nature, Breeding and Crop Husbandry Unit, Côte d’Ivoire Jean-Pierre Baudoin --- Unité de Phytotechnie Tropicale et d’Horticulture, Gembloux Agro-Bio Tech, Belgium Irié A Zoro Bi --- UFR des Sciences de la Nature, Breeding and Crop Husbandry Unit, Côte d’Ivoire

    Bottle gourd (Lagenaria siceraria (Molina) Standl.) is an edible, medicinal and decorative plant exhibiting wide genetic variation for fruit and seed characters, but it remains under-researched. This study assessed inheritance of fruit neck, fruit rind hardness, seed coat hardness and...

    View item »
80. 

    Lesion size induced by Chrysoporthe fungal pathogens varies between Eucalyptus species and geographic locations in Zambia

    Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Donald Chungu --- Department of Plant and Environmental Sciences, School of Natural Resources, Zambia Jedrick Siyingwa --- Department of Plant and Environmental Sciences, School of Natural Resources, Zambia Phillimon Ng’andwe --- Department of Biomaterial Science and Technology, School of Natural Resources, Zambia Bertha Chitala Chungu --- School of Business, Zambia

    Chrysoporthe canker disease is one of the serious threats facing planted Eucalyptus in southern Africa. In order to manage this disease, planting of less susceptible species of Eucalyptus has been promoted in many countries but it is not clear which...

    View item »
81. 

    Age classes of developing Red-necked Spurfowl Pternistis afer based on plumage, morphology and behaviour

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Johann H van Niekerk --- Department of Environmental Sciences, College of Agriculture and Environmental Sciences, South Africa

    This paper describes the plumage and morphology development of 11 age classes of Red-necked Spurfowl Pternistis afer to assist with field observations. Sixteen spurfowl were marked with coloured leg rings in the Cannon Rocks Holiday Resort, Eastern Cape, South Africa...

    View item »
82. 

    A review of the use of birds’ nests by Egyptian geese, including a breeding attempt in a hooded vulture nest

    Item type: Journal Article • Journal: African Zoology • Authors: Lindy J Thompson --- Centre for Functional Biodiversity, School of Life Sciences, South Africa Carrie J Hickman --- School of Environment, Earth and Ecosystem Sciences, United Kingdom John P Davies --- Birds of Prey Programme, Endangered Wildlife Trust, South Africa Fiona Fern --- Independent researcher, United Kingdom Colleen T Downs --- Centre for Functional Biodiversity, School of Life Sciences, South Africa

    Egyptian geese Alopochen aegyptiaca are widely reported to be territorial and aggressive. They are known to attack and sometimes kill other birds and they may attempt to usurp their nests. Here information is collated on the bird species whose nests...

    View item »
83. 

    Effects of social network services (SNS) subjective norms on SNS addiction

    Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Joon-ho Kim --- The Cultural Policy Network, South Korea Goon-ju Kim --- Department of Future Strategy, South Korea Hyun-ju Choi --- Department of Cultural & Arts Management, South Korea Bong-ihn Seok --- Commercialization Finance Team, South Korea Nam-hyun Lee --- Department of Performing Arts, South Korea

    We examined social network services (SNS) influence on SNS subjective norms for connectivity, perceived pleasure, and addiction. Utilising survey data of ordinary South Africans (N = 927; female = 393), collected by a global research institution (Entrust Survey) between 1...

    View item »
84. 

    Identification of land predators of African Penguins Spheniscus demersus through post-mortem examination

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Ralph ET Vanstreels --- Marine Apex Predator Research Unit, Institute for Coastal and Marine Research, South Africa Nola J Parsons --- Southern African Foundation for the Conservation of Coastal Birds, South Africa Cuan McGeorge --- Stony Point Nature Reserve, South Africa Renata Hurtado --- Southern African Foundation for the Conservation of Coastal Birds, South Africa Katrin Ludynia --- Southern African Foundation for the Conservation of Coastal Birds, South Africa Lauren Waller --- Southern African Foundation for the Conservation of Coastal Birds, South Africa Monique Ruthenberg --- Hottentots Holland Nature Reserve, South Africa Arne Purves --- Environmental Management Department, Transport and Urban Development Authority, South Africa Lorien Pichegru --- Marine Apex Predator Research Unit, Institute for Coastal and Marine Research, South Africa Pierre A Pistorius --- Marine Apex Predator Research Unit, Institute for Coastal and Marine Research, South Africa

    The African Penguin Spheniscus demersus is an endangered seabird endemic to southern Africa, and killing sprees by terrestrial predators have been one of the main threats for its mainland colonies. The methods employed to manage predators may differ depending on...

    View item »
85. 

    Exploring the concept of hostmanship through “50 cups of coffee”

    Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Monique Medema --- , The Netherlands Brenda de Zwaan --- , The Netherlands

    This article explores how hospitality academics and students understand, interpret and experience hostmanship. Building on a literature review which outlines and discusses the development and definition of hospitality, this exploratory study is framed by an interpretivist approach. Semi-structured interviews were...

    View item »
86. 

    Movements and growth rates of the broadnose sevengill shark Notorynchus cepedianus in southern Africa: results from a long-term cooperative tagging programme

    Item type: Journal Article • Journal: African Journal of Marine Science • Authors: TM Engelbrecht --- , South Africa AA Kock --- , South Africa MJ O’Riain --- , South Africa BQ Mann --- , South Africa SW Dunlop --- , South Africa A Barnett --- , Australia

    Top predators are important components of healthy ecosystems but are at risk of overexploitation due to insufficient data on life-history characteristics and population dynamics to guide management. We investigated the movements and growth rates of the broadnose sevengill shark Notorynchus...

    View item »
87. 

    Time dynamics of connectedness between commodity convenience yields and zero-coupon inflation swap rates

    Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Okan Aybar --- , France Mehmet Huseyin Bilgin --- , Turkey Serda Selin Öztürk --- , Turkey

    Globalisation and financial liberalisation have made financial markets more correlated and connected. In this context, it has become extremely important to understand the connectedness and correlation among different financial markets and commodities. This paper attempts to extend applicable empirical studies...

    View item »
88. 

    Changes in pastoral mobility in a semi-arid montane region of South Africa: The role of policy and legislation

    Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: M Igshaan Samuels --- , South Africa Nicky Allsopp --- , South Africa M Timm Hoffman --- , South Africa

    Legislation and policy are key tools used by governments to change the socio-economic and political landscape of agrarian systems with consequences for mobile pastoralism. This study used the social-ecological systems framework to examine how pastoral mobility in the semi-arid, montane...

    View item »
89. 

    Reliability and quality of artificial nectar feeders for birds in the Cape Floristic Region

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Anina Coetzee --- , South Africa Phoebe Barnard --- , South Africa Anton Pauw --- , South Africa

    Supplementary feeding of birds may have considerable ecological and evolutionary effects on bird communities. However, there is a lack of basic information on the prevalence, frequency and quality of supplementary feeders, especially in African urban areas. Here we describe the...

    View item »
90. 

    Re-imagining and transforming events: Insights from the Australian events industry

    Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Effie Steriopoulos --- , Australia Jeff Wrathall --- , Australia

    Over the past year, COVID-19 has hit the events industry with unprecedented force, resulting in event cancellations, reduced employment and salary cuts, with most event organisations moving either partially or fully to virtual events. Most challenging is the uncertainty in...

    View item »
91. 

    Temporal partitioning of diurnal bird and nocturnal small mammal visitors to a winter flowering endemic succulent

    Item type: Journal Article • Journal: African Zoology • Authors: Stephanie L Payne --- , South Africa Craig T Symes --- , South Africa Ed TF Witkowski --- , South Africa

    Floral nectar is an important attractant and reward for visitors, and is often produced in synchrony with peak activity of pollinators. Aloe peglerae flowers in winter, and previous studies have shown that it is pollinated primarily by diurnal generalist birds,...

    View item »
92. 

    When the flathead mullet left St Lucia

    Item type: Journal Article • Journal: African Journal of Marine Science • Authors: AK Whitfield --- , South Africa

    The St Lucia estuarine system on the east coast of South Africa is a declared World Heritage Site and Ramsar Site of International Importance. A major ecological feature of St Lucia during the last century was the annual spawning migration...

    View item »
93. 

    Evaluating the evidence for ecological effectiveness of South Africa’s marine protected areas

    Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SP Kirkman --- , South Africa BQ Mann --- , South Africa KJ Sink --- , South Africa R Adams --- , South Africa T-C Livingstone --- , South Africa JB Mann-Lang --- , South Africa MC Pfaff --- , South Africa T Samaai --- , South Africa MG van der Bank --- , South Africa L Williams --- , South Africa GM Branch --- , South Africa

    We reviewed 140 papers to assess the ecological effectiveness of South Africa’s marine protected areas (MPAs). Evidence was assessed for coverage and representivity, protection of important biodiversity areas, other recognised elements of effectiveness, connectivity, and ecological effects—from the scale of...

    View item »
94. 

    Carbon production from seasonal litterfall in the Brazilian Atlantic Forest

    Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Greyce CB Maas --- , Brazil Carlos R Sanquetta --- , Brazil Renato Marques --- , Brazil Sebastião do A Machado --- , Brazil Mateus NI Sanquetta --- , Brazil Ana Paula D Corte --- , Brazil Iara M Barberena --- , Brazil

    Forests play an important role in climate change, acting as a source or sink of carbon. There is, however, a lack of data regarding the carbon production from litterfall in tropical forests. The Atlantic Forest is one of the most...

    View item »
95. 

    Case study: nutritional considerations in the head and neck cancer patient

    Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Nathaniël Van Wyk --- , South Africa

    Head and neck squamous cell cancer (HNSCC) involves cancer of the oral cavity, oropharynx, hypopharynx and larynx. By virtue of the tumour location, nutrition support in this patient cohort can be extremely challenging. A 48-year-old male presented with a two-month...

    View item »
96. 

    Creating sustainable competitive advantage in the hospitality industry through commercial friendships: connecting the host and guest on a social and emotional level

    Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Sake Jan Velthuis --- , The Netherlands

    A large part of quality and competitive advantage in hospitality comes from friendly service. A lot of research in the hospitality industry is done from the viewpoint of management and aimed at how businesses should be designed to be friendly,...

    View item »
97. 

    Is the rand a commodity currency? A volatility spillover analysis

    Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Ayesha Sayed --- , South Africa Ailie Charteris --- , South Africa

    South Africa is a major commodity exporter, yet it is not clear what impact volatility in commodity prices has on the volatility of its currency. In this study, we examine whether a comprehensive sample of commodities (metals, grains and energy)...

    View item »
98. 

    Curvature properties of metric and semi-symmetric linear connections

    Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Miloš Z. Petrović --- , Serbia Nenad O. Vesić --- , Serbia Milan Lj. Zlatanović --- , Serbia

    Considering a non-symmetric linear connection and its dual one appear 6 independent curvature tensors [15]. In the present paper we study properties of curvature tensors of semi-symmetric metric connections on a generalized Riemannian manifold.

    View item »
99. 

    The implementation of a maternal mHealth project in South Africa: Lessons for taking mHealth innovations to scale

    Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Obidimma Ezezika [cor1] Chareena Varatharajan --- University of Toronto, Scarborough, Canada Shanelle Racine --- Ontario Tech University, Canada Edward Kwabena Ameyaw --- University of Technology Sydney, Australia

    MomConnect is a mHealth programme in South Africa targeted at improving antenatal and maternal health. This study explored the barriers and facilitators to implementing the MomConnect programme in South Africa and the applicable lessons for scaling mHealth programmes in Africa...

    View item »
100. 

     A note on stabilisations of manifolds

     Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Daniele Ettore Otera --- Vilnius University, Institute of Data Science and Digital Technologies, Lithuania

     In this short note we consider the relationships between two topological tameness condition at infinity of open manifolds in the case of product with a ball.

     View item »
101. 

     Nearly para-Kähler geometry on Lie groups

     Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Leila Nourmohammadifar --- Arak University, Iran Esmaeil Peyghan --- Arak University, Iran

     In this paper, we introduce left-invariant (strict) nearly para-Kaähler structures on Lie groups (nearly para-Kähler Lie algebras) and present some properties of them. We prove the existence of a unique connection in terms of the characteristic connection on these Lie...

     View item »
102. 

     Road counts reveal The Gambia’s West Coast region still has the densest population of Hooded Vultures Necrosyrtes monachus in Africa

     Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Mawdo Jallow --- , The Gambia Momodou L Dibba --- , The Gambia Fagimba Camara --- , The Gambia David R Barber --- , United States Keith L Bildstein --- , United States Lindy J Thompson --- , United States

     Road surveys are a useful tool for comparing vulture population trends. Here we present data from road surveys to count Hooded Vultures Necrosyrtes monachus in The Gambia in 2017 and 2021. In the first nationwide road survey in November 2017...

     View item »
103. 

     Digital Jordan curves and surfaces with respect to a graph connectedness

     Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Josef Šlapal --- Brno University of Technology, Institute of Mathematics, Czech Republic

     We introduce a graph connectedness induced by a given set of paths of the same length. We focus on the 2-adjacency graph on the digital line ℤ with a certain set of paths of length n for every positive integer...

     View item »
104. 

     Political and socio-economic instability: does it have a role in the HIV/AIDS epidemic in sub-Saharan Africa?

     Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Ramaswamy Premkumar [CXX0001] Achilles Tebandeke --- Walden University, USA

     Many sub-Saharan African countries are confronted by the HIV/AIDS epidemic. This article reviews academic literature in the social sciences and health to discover why HIV/AIDS has become an epidemic in sub-Saharan Africa and not in other parts of the world...

     View item »
105. 

     A critically endangered new species of Nectophrynoides (Anura: Bufonidae) from the Kihansi Gorge, Udzungwa Mountains, Tanzania

     Item type: Journal Article • Journal: African Journal of Herpetology • Authors: JohnC. Poynton --- , England KimM. Howell --- University of Dar es Salaam, Tanzania BarryT. Clarke --- , England JonC. Lovett --- University of York, England

     A new species of the Tanzanian ovoviviparous dwarf toad Nectophrynoides is described from the Kihansi River Gorge in the Udzungwa Mountains, and a key to the genus provided. The new species, currently known only from small patches of spray-dependent wetland...

     View item »

106. A new forest toad from the Ukaguru Mountains, Tanzania (Bufonidae: Nectophrynoides)

     Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: Alan Channing --- University of the Western Cape, South Africa Michele Menegon --- Museo Tridentino di Scienze Naturali, Italy Sebastiano Salvidio --- DIP.TE.RIS Corso Europa 26, Italy Scott Akker --- , United Kingdom

     A new species of Nectophrynoides is described from the Ukaguru Mountains of Tanzania. It is distinguished from the other species in the genus by a combination of morphological characters. This is the only African bufonid known with a biphasic vocalization.

     View item »
107. 

     More on cardinality bounds involving the weak Lindelöf degree

     Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: A. Bella --- University of Catania, Italy N. Carlson --- California Lutheran University, USA I. Gotchev --- Central Connecticut State University, USA

     We give several new bounds for the cardinality of a Hausdorff topological space X involving the weak Lindelöf degree ωL(X). In particular, we show that if X is extremally disconnected, then |X| ≤ 2 ωL (X)πχ(X)ψ(X), and if X...

     View item »
108. 

     Volatility spillover and connectedness among REITs, NFTs, cryptocurrencies and other assets: Portfolio implications

     Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Masud Alam --- , Bangladesh Mohammad Ashraful Ferdous Chowdhury --- , Mohammad Abdullah --- Universiti Sultan Zainal Abidin, Malaysia Mansur Masih --- Finance/Islamic Finance, UniKL Business School, Malaysia

     We investigate the return and volatility spillovers among NFTs, REITs, and other major financial assets from January 2019 to November 2022, using connectedness approaches. The findings indicate that total return and volatility connectedness increased during the COVID-19 and the Russia–Ukraine...

     View item »
109. 

     Connectedness modulo an ideal; a characterization theorem

     Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: M.R. Koushesh --- Isfahan University of Technology, Iran

     Let X be a topological space and let be an ideal of subsets of X. The space X is called connected modulo if there is no continuous mapping f : X → [0, 1] which is 2-valued modulo in the...

     View item »
110. 

     Features of Turner syndrome in patients managed at the adult endocrinology clinic, Steve Biko Academic Hospital

     Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: M. Noeth --- University of Pretoria, South Africa T. Kemp --- University of Pretoria, South Africa T. Botha --- University of Pretoria, South Africa

     View item »
111. 

     A note on J -spaces and relatively connected subsets

     Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Simo S. Mthethwa --- University of KwaZulu-Natal, South Africa Ali Taherifar --- Yasouj University, Iran

     In this note we present an investigation of J -spaces and other types of spaces related to J -spaces. We characterise these spaces using the notion of relatively connected subsets. For a completely regular J -space X, we give a...

     View item »
112. 

     The significance of the contributions of congruences to the theory of connectednesses and disconnectednesses for topological spaces and graphs

     Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Stefan Veldsman --- Nelson Mandela University, South Africa

     This is a survey of some of the consequences of the recently introduced congruences on the theory of connectednesses (radical classes) and disconnectednesses (semisimple classes) of graphs and topological spaces. In particular, it is shown that the connectednesses and disconnectednesses...

     View item »
113. 

     Interpersonal sensitivity, smartphone addiction, connectedness to nature and life satisfaction among college students: A moderated mediation model

     Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: --- Beijing Forestry University, China --- Hebei Normal University, China --- Beijing Forestry University, China --- Beijing Forestry University, China

     This study explored the relationship between interpersonal sensitivity and life satisfaction among college students, the mediating effect of smartphone addiction, and the moderating effect of connectedness to nature. A total of 702 college students (453 females, Meanage = 19.60 years,...

     View item »
114. 

     Return and volatility connectedness across stock markets: A global perspective

     Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Huifu Nong --- School of Economics, Guangxi Minzu University, China

     The connectedness of stock markets is inevitable because of the rapid increases in global financialisation, financial liberalisation, and integration of national economies. This study therefore increases the number of stock markets included in the LASSO-VAR model to separately estimate the...

     View item »
115. 

     Truncated vector lattices: A Maeda-Ogasawara type representation

     Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Karim Boulabiar --- Université de Tunis El Manar, Tunisia Rawaa Hajji --- Université de Tunis El Manar, Tunisia

     Let L be a truncated Archimedean vector lattice whose truncation is denoted by *. In a recent paper, we proved that there exists a locally compact Hausdorff space X such that L is a lattice isomorphic with a truncated vector...

     View item »
116. 

     Parents’ environmental knowledge and perception of young children’s nature connectedness: The serial mediating role of parents’ environmental concern and parent–child engagement

     Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Zeng Xiaoying --- Nanjing Normal University, China

     This study explored the relationship between parents’ environmental knowledge and 3- to 6-year-old children’s nature connectedness, and the mediating role of parents’ environmental concern and parent–child engagement in that relationship. Participants were 427 parents from rural western China (female =...

     View item »
117. 

     Concircularly semi-symmetric metric connection

     Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Miroslav D. Maksimović --- University of Priština in Kosovska Mitrovica, Serbia Miloš Z. Petrović --- University of Niš, Serbia Nenad O. Vesić --- Mathematical Institute of Serbian Academy of Sciences and Arts, University of Belgrade, Milan Lj. Zlatanović --- University of Niš, Serbia

     Results on a concircularly semi-symmetric metric connection on a Riemannian manifold are presented. Six linearly independent curvature tensors with respect to this non-symmetric linear connection are studied, and the tensors coincident with the Weyl projective curvature tensor and the concircular...

     View item »
118. 

     Differential geometry of Hom-Lie algebras and Hom-Lie algebroids

     Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Bayram Şahin --- Ege University, Turkey Fulya Şahin --- Ege University, Turkey

     In this paper, the geometry of Hom-Lie algebras and Hom-Lie algebroids are studied. In this direction, the effects of connections on Hom-Lie algebras and Hom-Lie algebroids are first investigated. By finding the relations among hom-curvature operator, torsion and connection on...

     View item »
119. 

     Idempotents in Banach Algebras II

     Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Rudi Brits --- University of Johannesburg, South Africa Muhammad Hassen --- University of Johannesburg, South Africa Francois Schulz --- University of Johannesburg, South Africa

     Let A be a complex and unital Banach algebra, and let E denote the collection of idempotents of A. An old paper of J. Zemánek’s, which was really the starting point of studies of idempotents in general Banach algebras, exhibits...

     View item »
120. 

     Zooplankton composition following an artificial mouth breaching event in Lake St Lucia, South Africa

     Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: NK Carrasco --- University of KwaZulu-Natal, South Africa S Ramdass --- University of KwaZulu-Natal, South Africa

     Lake St Lucia is one of the most important estuarine systems in South Africa, but the long history of anthropogenic intervention has threatened its integrity. With the exception of sporadic overtopping events and periodic marine connectivity via the uMfolozi River,...

     View item »
121. 

     The interconnectedness and spillover effects among economic uncertainty, energy-related risks and sovereign risk in BRICS economies

     Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Pascal Xavier Gnagne --- School of Economics, University of Johannesburg, South Africa Beatrice D. Simo-Kengne --- School of Economics, University of Johannesburg, South Africa Mathias Mandla Manguzvane --- School of Economics, University of Johannesburg, South Africa

     Emerging economies experiencing energy-intensive growth face increased energy price volatility, which could fuel macroeconomic instability with possible implications on their debt repayment capacity. This study implements a quantile vector autoregressive model on a dataset collected between April 2011 and July...

     View item »
122. 

     The number of 1-nearly independent vertex subsets

     Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Eric O.D. Andriantiana --- Rhodes University, South Africa Zekhaya B. Shozi --- University of KwaZulu-Natal, South Africa

     Let G be a graph with vertex set V(G) and edge set E(G). A subset I of V(G) is an independent vertex subset if no two vertices in I are adjacent in G. We study the number, σ 1(G), of...

     View item »
123. 

     On variants and generalizations of J-frames

     Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Siyabonga S. Dubazana --- University of KwaZulu-Natal, S.A. Simo S. Mthethwa --- University of KwaZulu-Natal, S.A.

     A J-frame is a pointfree topology counterpart of the concept of a J-space. In this paper, we present a study of some frames satisfying conditions that are stronger (and some that are weaker) than those defining J-frames. Conditions under which...

     View item »
124. 

     A multiscale analysis of returns and volatility spillovers in cryptocurrency markets: A post-COVID perspective

     Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Andrew Phiri --- Nelson Mandela University, South Africa Izunna Anyikwa --- Nelson Mandela University, South Africa

     Since the onset of the COVID-19 pandemic, leading cryptocurrencies have undergone significant price fluctuations, prompting widespread interest in the interdependence and spillover effects among cryptocurrency markets, as well as in identifying the key cryptocurrencies that drive market movements. This study...

     View item »
125. 

     Gratitude to nature and pro-environmental behaviour: A moderated mediated model

     Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Xiaoyu Li --- Inner Mongolia Normal University, China Xindi Kong --- Inner Mongolia Normal University, China Hongyu Liang --- Inner Mongolia Normal University, China Yifan Wang --- Inner Mongolia Normal University, China

     We examined the relationship between trait gratitude to nature and pro-environmental behaviours, and the roles of anthropomorphism and connectedness to nature within this relationship. University students (n = 966; female = 47.09%; mean age = 20.75 years, SD = 1.42...

     View item »
126. 

     Recreating valour: Exploring the life domains and quality of life impact among military re-enactors

     Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Dewald Venter --- Vaal University of Technology, South Africa

     This study explored the effect on military re-enactors’ life domains and quality of life (QoL). Eight military re-enactors (female = 1, male = 7; age range 42–75 years) were interviewed before and after participating in a military re-enactment regarding the...

     View item »
127. 

     On a variant of extremal disconnectedness in locales and spaces

     Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Themba Dube --- University of South Africa, South Africa Ali Taherifar --- Yasouj University, Iran

     We study a variant of extremal disconnectedness in frames, defined by requiring that any two disjoint open sublocales should be separable by disjoint open sublocales each of which is the interior of some zero-sublocale. In spaces, this notion was recently...

     View item »
128. 

     The first record of Cape Clawless Otters Aonyx capensis predating on African Penguins Spheniscus demersus

     Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Albert Snyman --- Southern African Foundation for the Conservation of Coastal Birds (SANCCOB), South Africa Arne Purves --- , South Africa Alison Kock --- , South Africa Mashudu H Mashau --- , South Africa Faroeshka Rodgers --- , South Africa Katrin Ludynia --- Southern African Foundation for the Conservation of Coastal Birds (SANCCOB), South Africa

     The African Penguin Spheniscus demersus, a critically endangered seabird endemic to southern Africa, faces substantial threats from terrestrial predators at its mainland colonies. Correct identification of the predator species is essential for effective conservation management. This study provides the first...

     View item »
129. 

     Heavy metal contamination in mangrove ecosystems: assessing bioaccumulation in crabs and snails along the Bayelsa Coast, Nigeria

     Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: HO Adamu --- University of Bremen, Germany JI Izegaegbe --- University of Eastern Finland, Finland RO Hussaini --- Ambrose Alli University, Nigeria EM Odoya --- Ambrose Alli University, Nigeria HO Adamu --- Federal Ministry of Water Resources, Nigeria

     Rapid human population growth and industrial activities along coastal areas have intensified anthropogenic contamination in water, sediment and edible fauna, posing public health risks. Mangrove ecosystems act as pollutant sinks, increasing the likelihood of heavy metal accumulation in aquatic organisms...

     View item »