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Interaction between Cape hake spawning and the circulation in the northern Benguela upwelling ecosystem
Item type: Journal Article • Journal: South African Journal of Marine Science • Authors: S. Sundby A. J. Boyd L. Hutchings M. J. O'Toole K. Thorisson A. ThorsenCape hake in Namibian waters are demersal and mesopelagic spawners, spawning peaking offshore between 100 and 400 m deep, depending on local environmental conditions. The cross-shelf circulation, low-oxygen layers and mesoscale gyres are three important environmental factors influencing hake spawning... -
Branchipodopsis species — specialists of ephemeral rock pools
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: L Brendonck ML Hamer BJ Riddoch MT SeamanThe anostracan Branchipodopsis genus is widespread throughout southern Africa and is the second most speciose anostracan taxon in this sub-continent. Branchipodopsis species are particularly dominant in small short-lived and clear rock pools, to the vagaries of which they are extremely... -
Histological studies to evaluate gonad development in Barbus neefi (Cyprinidae), the sidespot barb, from South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: W VlokBarbus neefi gonads were collected seasonally from specimens from the Selati and Makutsi Rivers, tributaries of the Olifants River in Limpopo and Mpumalanga provinces, South Africa, preserved in 4% formalin solution and stained with hematoxilin/eosin. These collections represent new records... -
Avian fossils from the Early Miocene Moghra Formation of Egypt
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: N Adam Smith --- National Evolutionary Synthesis Center, USAAvian remains from the Early Miocene (∼17 Ma) Moghra Formation of Egypt include new records of ‘waterbirds’ (storks, herons, pelicans and allies) and a ratite. Only a single avian fossil has been previously reported from Wadi Moghra and, thus, additional... -
Adult Movement and Larval Dispersal of Argyrozona Argyrozona (Pisces: Sparidae) from a Temperate Marine Protected Area
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: S. L. Brouwer M. H. Griffiths M. J. RobertsAdult emigration and larval dispersal of carpenter Argyrozona argyrozona from the Tsitsikamma National Park (TNP), South Africa, were investigated using mark-recapture data and Acoustic Doppler Current Profiler measurements of currents. Tagging data showed that adult carpenter were mainly resident, with... -
Influence of oceanographic fronts and low oxygen on the distribution of ichthyoplankton in the Benguela and southern Angola currents
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: W Ekau HM VerheyeThe study focuses on ichthyoplankton populations in the southern Angola Current, the Angola-Benguela Front and the coastal upwelling area of the northern and central Benguela Current. The horizontal and vertical distributions of eggs and larvae of sardine Sardinops sagax, anchovy... -
Vertical distribution of small pelagic fish eggs and larvae on the eastern Agulhas Bank, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: W Osman --- Department of Zoology and Marine Research Institute, South Africa CL Moloney --- Department of Zoology and Marine Research Institute, South Africa CD van der Lingen --- Department of Agriculture, South AfricaVertical distributions of anchovy Engraulis encrasicolus and sardine Sardinops sagax eggs and larvae within the upper 50 m of the water column on the eastern Agulhas Bank, South Africa, were examined using discrete depth samples collected with a multiple, opening/closing... -
Diet and prey selection in late-stage larvae of five species of fish in a temperate estuarine nursery
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: NA Strydom --- Department of Zoology, South Africa K Sutherland --- Department of Zoology, South Africa TH Wooldridge --- Department of Zoology, South AfricaThe plankton assemblage of the permanently open Sundays Estuary in South Africa was sampled seasonally to provide further information on the feeding ecology of the larval stages of fishes in temperate estuaries. Collections were made between winter 2007 and autumn... -
Reproductive ecology and egg production of the radiated tortoise (Geochelone radiata) in southern Madagascar
Item type: Journal Article • Journal: African Zoology • Authors: Thomas E.J. Leuteritz --- Department of Biology, U.S.A. Rollande Ravolanaivo --- Department of Animal Biology, MadagascarWe studied reproduction of wild Geochelone radiata at the Cap Sainte Marie Special Reserve in southwestern Madagascar to gain insight into life history traits related to reproductive success. Reproductive behaviour was observed over two nesting seasons and egg production was... -
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 AfricaWe 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... -
Rotational grazing approaches reduces external and internal parasite loads in cattle
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Monde Rapiya --- Department of Livestock and Pasture Science, South Africa Heidi-Jayne Hawkins --- Department Biological Sciences, South Africa Voster Muchenje --- Department of Livestock and Pasture Science, South Africa John F Mupangwa --- Department of Animal Sciences, Namibia Munyaradzi C Marufu --- Department of Production Animal Studies, South Africa Kennedy Dzama --- Department of Animal Sciences, South Africa Cletos Mapiye --- Department of Animal Sciences, South AfricaWe tested whether holistic planned grazing (HPG) and four-camp grazing (FCG) rotational grazing approaches influence beef cattle parasites counts compared with continuous, season-long (SLG) grazing. We expected that parasite counts would increase linearly with increasing camp occupancy by cattle from... -
Mom’s taxi – Maternal care in shovel-nosed frogs Hemisus marmoratus and Hemisus guttatus
Item type: Journal Article • Journal: African Zoology • Authors: K Kyle --- Unit for Environmental Sciences and Management, South Africa LH du Preez --- Unit for Environmental Sciences and Management, South AfricaThis communication details the maternal care of Hemisus marmoratus and Hemisus guttatus. A Hemisus mother stays with the eggs, protecting them during their time in the nest chamber, and ensures their ultimate arrival in a body of water, at varying... -
Monteiro’s Hornbills Tockus monteiri do not exhibit addition indeterminacy
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Mark T Stanback --- , United StatesBirds that respond to the addition/removal of eggs by laying fewer/extra eggs are known as indeterminate layers. Species that are insensitive to additions/removals are said to be determinate layers. Hornbills are an interesting group with which to investigate this phenomenon,... -
The time-activity budgets of breeding Blue Swallows Hirundo atrocaerulea and the effects of weather on nestling growth
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Steven W Evans --- , South AfricaThe Blue Swallow is an intra-African migrant that breeds in its fragmented range from South Africa to southern Tanzania, from October to March annually. The birds migrate north and are on their non-breeding range in NE DRC, Uganda, NW Tanzania... -
Ethnomedicinal use of pythons by traditional medicine practitioners in Ghana
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Maxwell K Boakye --- Ho Technical University, Ghana Edward D Wiafe --- University of Environment and Sustainable Development, Ghana Meyir Y Ziekah --- Forestry Commission (Wildlife Division), GhanaThe use of Python spp. for traditional medicine purposes has been recorded, but there is a dearth of information on the versatility of body parts used for the treatment of human ailments. This study aimed to determine the medicinal knowledge... -
An assessment of postharvest losses to support innovation in the egg value chain in Ghana
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Evelyn Philomina Mensah --- , Ghana Richard Kwasi Bannor --- , Ghana Helena Oppong-Kyeremeh --- , Ghana Samuel Kwabena Chaa Kyire --- , GhanaThe study sought to examine the postharvest losses along the egg value chain in the Bono Region of Ghana. Objectively, the study sought to quantify losses incurred by value-chain actors of egg production, determine the factors that influence the losses... -
Predation on the eggs of ground-nesting birds by Dasypeltis scabra (Linnaeus, 1758) in the moist highland grasslands of South Africa
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Michael F. Bates --- , , South Africa Ian T. Little --- , South AfricaWe provide evidence for predation by the Common Egg-eater (Dasypeltis scabra) on the eggs of three species of ground-nesting birds, namely African Pipit (Anthus cinnamomeus), Cape Longclaw (Macronyx capensis) and Common Quail (Coturnix coturnix). Although egg-eaters have been recorded as... -
New Pleistocene avian ichnosites on South Africa’s Cape south coast
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Charles W Helm --- Nelson Mandela University, South Africa Martin G Lockley --- University of Colorado Denver, United States Andrew S Carr --- University of Leicester, United Kingdom Hayley C Cawthra --- Nelson Mandela University, South Africa Jan C De Vynck --- Nelson Mandela University, South Africa Mark G Dixon --- Nelson Mandela University, South Africa Pieter-Jan Gräbe --- Nelson Mandela University, South Africa Renée Rust --- Nelson Mandela University, South AfricaTwelve new avian ichnosites have been identified on South Africa’s Cape south coast, adding to the 29 sites previously identified. More than half of these 41 avian ichnosites are found along a 9-km stretch of coastline east of Still Bay... -
8. “Fish, chicken, lean meat and eggs can be eaten daily”: a food-based dietary guideline for South Africa
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Schonfeldt HC [cor1] Pretorius B --- Research Consultant Institute for Food, Nutrition and Well-being, University of Pretoria, Hall N --- Research Consultant Institute for Food, Nutrition and Well-being, University of Pretoria,Food products from animals provide a variety of macro- and micronutrients. Animal sources of food, such as fish, chicken, meat and eggs, constitute high-quantity and high-quality protein, as they contain essential amino acids in the right proportions. In South Africa,...