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The influence of rainfall on the seasonal abundance and flight activity of the maize stalk borer, Busseola fusca in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. B.J. van Rensburg --- Summer Grain Centre, Republic of South Africa G. D.J. van Rensburg --- Summer Grain Centre, Republic of South Africa J.H. Giliomee --- Department of Entomology, Republic of South Africa M.C. Walters --- , Republic of South AfricaThis study attempts to demonstrate the extent to which seasonal fluctuations in the number of Busseola fusca (Fuller) moths can be explained by precipitation data. Daily flight activity is shown to be enhanced by cool, humid conditions and restricted by... -
Grain yield and contribution of symbiotically fixed nitrogen to seed in cowpea varieties using the 15N natural abundance technique
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: K.K. Ayisi --- Department of Plant Production, Republic of South AfricaIdentification of cowpea varieties with superior grain yield and high nitrogen fixing potential is crucial to increasing productivity of the crop among small-scale farmers in the Northern Province. A field experiment was established during the 1997/98 growing season to evaluate... -
Depth-stratified density estimates and distribution of the Cape hake Merluccius capensis and M. paradoxus off Namibia deduced from survey data, 1990–1999
Item type: Journal Article • Journal: South African Journal of Marine Science • Authors: L-M. BurmeisterIn this study demersal survey data for the period 1990–1999 are used to investigate the average distribution of the Cape hake Merluccius capensis and M. paradoxus off Namibia in terms of density and mean length. Further, biomass estimates are compared... -
Variable spatial structure of schooling pelagic fish off Namibia: implications for acoustic surveys
Item type: Journal Article • Journal: South African Journal of Marine Science • Authors: J. C. Coetzee O. A. Misund G. OechslinSchools of horse mackerel Trachurus trachurus capensis, sardine Sardinops sagax and round herring Etrumeus whiteheadi were surveyed by conventional echo-integration along systematic transects. The transects were surveyed twice, in opposite directions. Clupeoid biomass was concentrated in a few dense aggregations,... -
Evaluation of a class of possible simple interim management procedures for the Namibian hake fishery
Item type: Journal Article • Journal: South African Journal of Marine Science • Authors: D. S. Butterworth H. F. GeromontDuring 1997, considerable scientific differences arose about the status of the Namibian hake (Merluccius capensis and M. paradoxus) resource, and as to whether the hake Total Allowable Catch (TAC) should be substantially decreased or increased. These differences revolved primarily around... -
Fishery characteristics and abundance estimates of the mangrove crab Scylla serrata in southern Tanzania and northern Moçambique
Item type: Journal Article • Journal: South African Journal of Marine Science • Authors: D. K. A. Barnes N. K. Dulvy S. H. Priestley W. R. T. Darwall V. Choisel M. WhittingtonThe mud crab Scylla serrata is lightly exploited along the East African seaboard. This study reports on fishing practices and gives preliminary estimates of abundance and size structures of the mud crab populations in Utende, Chole Island and Juani Island,... -
ON THE RELATIONSHIP BETWEEN TIGERFISH AND SARDINES IN LAKE KARIBA
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: B.E. Marshall --- Department of Biological Sciences, ZimbabweThere was a clear relationship in Lake Kariba between the abundance of young-of-the-year (0+) tigerfish and the sardines on which they prey. The abundant sardine population that existed before commercial fishing began accounted for the increase in tiger-fish which occurred... -
The effect of fire on the diversity and abundance of wood-living beetles in a miombo woodland, Tanzania
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: SeifS. Madoffe --- Department of Forest Biology, Tanzania Alf Bakke --- , Norway JusticeA. Tarimo --- Department of Forest Biology, TanzaniaWeekly sampling was carried out using window flight traps for three and a half successive years, between 1995–1998 to determine the effects of annual fires on the occurrence, abundance, and diversity of wood-living beetles in a miombo woodland at Kitulangalo,... -
Physical determinants of the distribution and abundance of the burrowing ocypodid crab Paratylodiplax blephariskios Stebbing in the St. Lucia and Mhlathuze estuaries, KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: RK Owen AT Forbes DP Cyrus SE PiperThe burrowing ocypodid crab, Paratylodiplax blephariskios, is endemic to the southeast coast of southern Africa where it forms an important component of the estuarine benthic fauna in muddy substrata. Two estuaries in KwaZulu-Natal, namely St. Lucia and the Mhlathuze, were... -
An assessment of the fish population of the lower reaches of the Sanyati River, Zimbabwe
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: W MhlangaThe fish population of the lower reaches of the Sanyati River was studied using multifilament gillnets and monthly sampling was conducted over 13 consecutive months. A total of 15 fish species belonging to seven families were collected and variations in... -
The impact of dredging on macrobenthic invertebrates in a tributary of the Warri River, Niger delta
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: EI Ohimain TOT Imoobe MO Benka-CokerThe macrobenthic invertebrates of a canal, created from a tributary of the Warri River in the mangrove swamp of the Niger Delta, Nigeria, were studied before and after dredging. In the canal dredging resulted in at least a 93% decrease... -
Population demographics of Palaemon peringueyi (Macpherson 1990) (Decapoda: Palaemonidae) in a small intermittently open Eastern Cape estuary
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: PW FronemanThe population demographics of the caridean shrimp Palaemon peringueyi was investigated monthly at four sites over a period of one year in the small, intermittently-open Grants River Estuary situated on the south-east coastline of southern Africa. Mean total abundance and... -
The association between invertebrates and macrophytes in a tropical reservoir, Lake Kariba, Zimbabwe: a preliminary survey
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Lindah Mhlanga Nqobizitha SizibaThe invertebrate fauna associated with aquatic macrophytes in the littoral of Lake Kariba was studied over a three-month period in 2002. Animals from seven classes — Hirudinea, Oligochaeta, Turbellaria, Insecta, Crustacea, Bivalvia and Gastropoda — were collected. Two hirudineans, Placobdella... -
The effect of plant density on epiphytic macroinvertebrates associated with a submerged macrophyte, Lagarosiphon ilicifolius Obermeyer, in Lake Kariba, Zimbabwe
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: C Phiri --- , Zimbabwe A Chakona --- Department of Ichthyology and Fisheries Science, South Africa JA Day --- Freshwater Research Unit, Zoology Department, South AfricaThe effect of variations in the density of a submerged macrophyte, Lagarosiphon ilicifolius, on epiphytic macroinvertebrate community structure in the shallow waters of a sheltered bay of Lake Kariba were investigated. The body size class distributions of a mayfly, Cloeon... -
Seasonal distribution of phytoplankton in the Aby lagoon system, Ivory Coast, West Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: NM Seu-Anoï --- Laboratoire d’Environnement et de Biologie Aquatique, Côte d'lvoire A Ouattara --- Laboratoire d’Environnement et de Biologie Aquatique, Côte d'lvoire YJ-M Koné --- Laboratoire d’Environnement et de Biologie Aquatique, Côte d'lvoire G Gourène --- Laboratoire d’Environnement et de Biologie Aquatique, Côte d'lvoireSeasonal variability of phytoplankton species composition, abundance and physical and chemical factors influencing phytoplankton dynamics were investigated in the Aby lagoon system, south-eastern Ivory Coast, covering the main climatic seasons in 2006–2007. Seasonal and spatial variability of nutrient concentrations in... -
Macroinvertebrates associated with two submerged macrophytes, Lagarosiphon ilicifolius and Vallisneria aethiopica, in the Sanyati Basin, Lake Kariba, Zimbabwe: effect of plant morphological complexity
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: C Phiri --- , Zimbabwe A Chakona --- Department of Ichthyology and Fisheries Science, South Africa JA Day --- Freshwater Research Unit, Department of Zoology, South AfricaVallisneria aethiopica and Lagarosiphon ilicifolius are common and abundant submerged macrophytes in Lake Kariba, Zimbabwe. The two species have distinct structural morphologies, with Vallisneria consisting of long ribbon-like leaves, while Lagarosiphon has filiform stems with numerous small alternate leaves. This... -
Optimum rabbit density over fish ponds to optimise Nile tilapia production in an integrated rabbit–fish system in Rwanda
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: S Rukera Tabaro --- School of Environmental Science, South Africa O Mutanga --- School of Environmental Science, South Africa D Rugege --- School of Environmental Science, South Africa JC Micha --- Research Unit in Environmental Biology, Department of Biology, BelgiumAlthough previous studies have suggested that rabbit excreta can be used as high-quality manure for sustaining plankton production due to their gradual nutrient release, integrated rabbit–fish production systems are still not widely used. Between 2006 and 2010 optimal rabbit densities... -
Fish sampling in the marine-dominated Kariega Estuary, South Africa, using a demersal otter trawl: day/night effects
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: SE Bailey --- , South Africa NC James --- , South AfricaVery few demersal fish assemblage studies using otter trawls in estuaries have been done in South Africa and none of these have tested for the effects of diel period. This study aimed to test whether diel period affects otter trawl... -
An integrated remote sampling approach for aquatic invertebrates associated with submerged macrophytes
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: PSR Weyl --- Department of Zoology and Entomology, South Africa JA Coetzee --- Department of Zoology and Entomology, South AfricaA sampling method and apparatus for collecting meaningful and quantifiable samples of aquatic macroinvertebrates, and the macrophytes they are associated with, are presented. Where physical danger from wildlife is a significant factor, especially in Africa, this apparatus offers some safety... -
Seasonal occurrence, distribution and diversity of phytoplankton in the Douala Estuary, Cameroon
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: AB Fonge --- Department of Botany and Plant Physiology, Cameroon BG Chuyong --- Department of Botany and Plant Physiology, Cameroon AS Tening --- Department of Chemistry, Cameroon AC Fobid --- Department of Botany and Plant Physiology, Cameroon NF Numbisi --- Department of Botany and Plant Physiology, CameroonThe occurrence and abundance of phytoplankton in the Wouri and Dibamba rivers and the Douala Estuary and their relationships to physico-chemical conditions were studied during the wet and dry seasons of 2008. One-hundred-and-sixty-eight species belonging to 67 genera were identified... -
Water quality and zooplankton of the Ogba River, Benin City, Nigeria
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: ED Anyanwu --- Department of Animal and Environmental Biology, Nigeria RB Ikomi --- Department of Animal and Environmental Biology, Nigeria FO Arimoro --- Department of Animal and Environmental Biology, NigeriaWater quality and zooplankton were investigated using standard methods at four stations in the Ogba River, Benin City, Nigeria, from January to April 2008 (dry season) and from May to August 2008 (rainy season). Nigerian water quality standards were used... -
Zooplankton composition and community structure in Lake Tiga, Kano, Nigeria
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: EO Akindele --- Department of Zoology, Nigeria IF Adeniyi --- Department of Zoology, NigeriaZooplankton in Lake Tiga was identified and its community structure assessed between March 2009 and March 2011. A total of 54 species of zooplankton was recorded, comprising two species of Protozoa, 26 species of Rotifera, eight species of Copepoda, 11... -
A review of Jouanin's Petrel records in the eastern Indian Ocean
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: PeterG Ryan --- DST/NRF Centre of Excellence at the Percy FitzPatrick Institute, South Africa Barrie Rose --- , South Africa Michael Carter --- , Australia RohanH Clarke --- School of Biological Sciences, AustraliaJouanin's Petrel Bulweria fallax mainly occurs in the western Indian Ocean. Prior to our study there were only two records from east of 82° E. We show that small numbers of Jouanin's Petrels are regular visitors to the eastern Indian... -
Spatial distribution of soluble reactive silica (SRSi) in the Tanzanian waters of Lake Victoria and its implications for diatom productivity
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: GW Ngupula --- Tanzania Fisheries Research Institute, Tanzania CN Ezekiel --- Tanzania Fisheries Research Institute, Tanzania ASE Mbonde --- Tanzania Fisheries Research Institute, Tanzania B Kashindye --- Tanzania Fisheries Research Institute, Tanzania E Mboni --- Tanzania Fisheries Research Institute, TanzaniaSoluble reactive silica (SRSi) concentrations and diatom abundance were determined during four surveys in the Tanzanian waters of Lake Victoria between 2005 and 2008. The SRSi concentrations increased towards offshore sites, while the opposite was true for diatom abundance. The... -
ON THE RELATIONSHIP BETWEEN TIGERFISH AND SARDINES IN LAKE KARIBA
Item type: Journal Article • Journal: Southern African Journal of Child and Adolescent Mental Health • Authors: B.E. Marshall --- Department of Biological Sciences, ZimbabweThere was a clear relationship in Lake Kariba between the abundance of young-of-the-year (0+) tigerfish and the sardines on which they prey. The abundant sardine population that existed before commercial fishing began accounted for the increase in tiger-fish which occurred... -
Alongshore distribution and abundance of fish larvae off the coast of Kenya
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: J.M. Mwaluma --- , Kenya B. Kaunda-Arara --- Department of Fisheries and Aquatic Sciences, Kenya J. Rasowo --- Department of Biological Sciences, KenyaKnowledge is limited on the fish larval assemblage in shallow lagoonal reefs along the Kenyan coast. Fish larvae from five lagoons, spanning 120 km on the Kenyan coast, were sampled in March 2007 and April 2008 to compare interannual spatial... -
Population size of neonate and juvenile dusky sharks Carcharhinus obscurus in the Port of Ngqura, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: ML Dicken --- Department of Development Studies, School of Economics, Development and Tourism, South AfricaIdentifying nearshore waters that serve as important habitats for neonate and juvenile sharks is crucial for effective fisheries management. This study examined the abundance of neonate and juvenile dusky sharks Carcharhinus obscurus within the Port of Ngqura, on the south-east... -
Transit station or destination? Attendance patterns, movements and abundance estimate of humpback whales off west South Africa from photographic and genotypic matching
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: J Barendse --- , South Africa PB Best --- , South Africa M Thornton --- , South Africa SH Elwen --- , South Africa HC Rosenbaum --- , USA I Carvalho --- , USA C Pomilla --- , USA TJQ Collins --- , USA MA Meÿer --- , South Africa RH Leeney --- , UKHumpback whales Megaptera novaeangliae found off west South Africa (WSA) are known to display an atypical migration that may include temporary residency and feeding during spring and summer. At a regional scale there is uncertainty about how these whales relate... -
Dugong abundance and distribution in the Bazaruto Archipelago, Mozambique
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: KP Findlay --- Department of Oceanography, South Africa VG Cockcroft --- , South Africa AT Guissamulo --- , MozambiqueDespite the distribution of dugongs Dugong dugon ranging across nearshore waters of the tropical and subtropical regions of the Indian Ocean and western Pacific Ocean, their distribution in the western Indian Ocean is highly fragmented and appears to be declining... -
Acoustic behaviour of southern right whales in relation to numbers of whales present in Walker Bay, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: LH Hofmeyr-Juritz --- , South Africa PB BestEstimating numbers of whales present in an area from recorded call rates could be a useful conservation tool. We recorded southern right whale Eubalaena australis vocalisations and presence in Walker Bay on the south coast of South Africa. In all,... -
Ecological distribution of the shrimp Nematopalaemon schmitti (Crustacea: Decapoda: Caridea) in three bays on the south-eastern coast of Brazil
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: AC Almeida --- NEBECC (Crustacean Biology, Ecology and Culture Study Group), Departamento de Zoologia, Brazil A Fransozo --- NEBECC (Crustacean Biology, Ecology and Culture Study Group), Departamento de Zoologia, Brazil GM Teixeira --- NEBECC (Crustacean Biology, Ecology and Culture Study Group), Departamento de Zoologia, Brazil KAN Hiroki --- NEBECC (Crustacean Biology, Ecology and Culture Study Group), Departamento de Zoologia, Brazil M Furlan --- NEBECC (Crustacean Biology, Ecology and Culture Study Group), Departamento de Zoologia, Brazil G Bertini --- , BrazilThe relationships between the spatial and temporal variations in the abundance of the shrimp Nematopalaemon schmitti and water temperature, salinity, and texture and organic-matter content of the sediment, were analysed in Ubatumirim, Ubatuba and Mar Virado bays on the northern... -
Composition of macrobenthos in the Wouri River estuary mangrove, Douala, Cameroon
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: VM Ngo-Massou --- Department of Botany, Faculty of Science, Cameroon GL Essome-Koum --- Department of Botany, Faculty of Science, Cameroon E Ngollo-Dina --- , USA N Din --- Department of Botany, Faculty of Science, CameroonThe macrobenthos of mangroves is dominated by crabs and molluscs, which have a significant ecological role in terms of the structure and function of mangroves. The aim of this study was to determine the abundance and biological diversity of these... -
Diversity of decapod crustaceans at the interface of unconsolidated seabed areas and rocky shores in tropical/subtropical Brazil
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A Fransozo --- Departamento de Zoologia, Instituto de Biociências, Brazil M Furlan --- Departamento de Zoologia, Instituto de Biociências, Brazil V Fransozo --- , Brazil G Bertini --- , Brazil RC da Costa --- Departamento de Ciências Biológicas, Faculdade de Ciências, Brazil LC Fernandes-Góes --- , BrazilThe decapod crustacean assemblages from unconsolidated seabed areas located near rocky shores in the Ubatuba region on the south-east coast of Brazil were analysed by investigating the abundance, richness, diversity and dominance of species. The relationships of the sediment and... -
Seasonality in fish assemblage structure in an East African mangrove creek
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: MW Wainaina --- , Kenya B Kaunda-Arara --- Department of Fisheries and Aquatic Sciences, Kenya JM Njiru --- Department of Fisheries and Aquatic Sciences, KenyaThe spatial and seasonal structures of fish assemblages in a tropical mangrove tidal creek, Tudor, Kenya, were analysed from monthly survey data, extending from October 2007 to July 2008, and covering the north-east (NEM; October–March) and south-east (SEM; April–July) monsoon... -
Occurrence of larval fishes in a rocky shore-associated nursery area in temperate South Africa, with emphasis on temperature-related growth in dominant Sparidae
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: NA Strydom --- Nelson Mandela Metropolitan University, South Africa AJ Booth --- Department of Ichthyology and Fisheries Science, South Africa A McLachlan --- Nelson Mandela Metropolitan University, South AfricaLarval fishes were studied in Shark Bay on the warm, temperate south-east coast of South Africa. The bay is a small, shallow, subtidal area associated with a rocky shore. Sampling took place fortnightly for a period of one year (September... -
Dry season fish survival in isolated pools and within sand-beds in the Mzingwane River, Zimbabwe
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: JohnL MinshullFour isolated pools in the otherwise dry Mzingwane River, Zimbabwe, were sampled in December 1985 and a total of 4 547 specimens of 23 species were collected. The dominant species, by number, were Chiloglanis paratus, followed by Barbus toppini, Mesobola... -
Variation in benthic macroinvertebrate assemblages in Ologe Lagoon, Nigeria
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: TundeOT ImoobeThe community structure, diversity and seasonal variation of the benthic macroinvertebrates in Ologe Lagoon were studied at four sites during the dry and wet seasons of 2003 to provide environmental baseline data for the lagoon. The community comprised 29 taxa... -
Comparison of, and the effects of altered freshwater inflow on, fish assemblages of two contrasting South African estuaries: the cool-temperate Olifants and the warm-temperate Breede
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SJ Lamberth L van Niekerk K HutchingsThis study compares the fish assemblages of the permanently open cool-temperate Olifants and warm-temperate Breede estuaries on the west and south coasts of South Africa respectively, and their responses to altered freshwater flows. Both estuaries have experienced a >35% reduction... -
Assessing the utility of a continuous, underway fish egg sampler (CUFES) for sampling zooplankton
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: S Sono --- Department of Zoology, South Africa CL Moloney --- Marine Research Institute and Department of Zoology, South Africa CD van der Lingen --- Department of Environmental Affairs, South AfricaThe accuracy of using a continuous underway fish egg sampler (CUFES) to sample zooplankton was assessed by comparing CUFES samples with those collected using a vertically towed bongo net. Samples were collected concurrently by the two samplers along four inshore-offshore... -
Macrozoobenthic communities in waters off Angola
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: G Lange --- Leibniz Institute for Baltic Sea Research, Germany A Darr --- Leibniz Institute for Baltic Sea Research, Germany ML Zettler --- Leibniz Institute for Baltic Sea Research, GermanyMacrozoobenthic biodiversity is described for waters off Angola, one of the poorest-known marine environments of the world. During research cruises in 2004 and 2011, the shelf region of Angola was investigated at 39 stations in water depths of between 19... -
Macroinvertebrate distributions in relation to human and animal-induced physical disturbance of the sediment surface in two Kenyan tropical Rift Valley streams
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: CM M'Erimba --- Department of Biological Sciences, Kenya JM Mathooko --- Global Research Akademik and Mentoring Services, Kenya KO Ouma --- Department of Biological Sciences, KenyaA study of macroinvertebrate distribution in relation to different levels of human and animal physical disturbance of the sediments of the Njoro (highly disturbed) and Ellegirini (less disturbed) rivers was conducted from October 2001 to June 2002, and again in... -
Spatial and seasonal patterns in sighting rate and life-history composition of the white shark Carcharodon carcharias at Mossel Bay, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: R Ryklief --- Department of Zoology, South Africa PA Pistorius --- Department of Zoology, South Africa R Johnson --- Oceans Research, South AfricaWhite sharks Carcharodon carcharias aggregate at specific times of the year at localities along the South African coast. At Mossel Bay, on the southern Cape coast, four sites were sampled (Seal Island, Hartenbos, Kleinbrak and Grootbrak) to investigate spatial and... -
Nitrogen fixation of Acacia mangium Willd. from two seed sources grown at different levels of phosphorus in an Ultisol, South Sumatra, Indonesia
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: M Gunawan Wibisono --- School of Plant Biology, Australia Erik Veneklaas --- School of Plant Biology, Australia Daniel S Mendham --- CSIRO Ecosystem Sciences, Australia Eko B Hardiyanto --- Faculty of Forestry, IndonesiaPhosphorus (P) is required to facilitate the fixation of atmospheric nitrogen (N) by leguminous species such as Acacia mangium. We studied the N fixation of A. mangium trees grown from two seed sources. These consisted of bulk seedlots collected from... -
Species composition and recruitment of tidal pool fishes in KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Lynnath E. Beckley --- Oceanographic Research Institute, South AfricaFishes occurring in a lower shore tidal pool near Durban, South Africa, were collected using rotenone at monthly intervals for a year. Eighteen teleost families and 50 lower taxa of fishes were recorded. Cryptic Tripterygiidae, Blenniidae and Gobiidae were particularly... -
Abundance of the endangered Cape parrot, Poicephalus robustus, in South Africa: implications for its survival
Item type: Journal Article • Journal: African Zoology • Authors: Colleen T. Downs --- School of Botany and Zoology, University of KwaZulu-Natal, South AfricaFactors affecting the decline of the endangered Cape parrot, which is endemic to South Africa, are presented. Its abundance and status were investigated during annual intensive national surveys. The merits of such a census are reported. Presence of birds was... -
A test of five mechanisms of species coexistence between rodents in a southern African savanna
Item type: Journal Article • Journal: African Zoology • Authors: M.R. Perrin --- School of Biological and Conservation Sciences, University of KwaZulu-Natal, South Africa B.P. Kotler --- Blaustein Institute for Desert Research, Mitrani Department of Desert Ecology, IsraelThe operation of five different mechanisms of species coexistence in a community of rodents was examined in a semi-arid Kalahari savanna in southern Africa. The two most common species were Tatera leucogaster (bushveld gerbil) and Rhabdomys pumilio (striped mouse). The... -
Waterfowl abundance and diversity in relation to season, wetland characteristics and land-use in semi-arid South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Ashley A. Raeside --- Department of Biology, Canada Scott A. Petrie --- Long Point Waterfowl and Wetlands Research Fund, Bird Studies Canada, Canada Thomas D. Nudds --- Department of Integrative Biology, Ecology Group, CanadaWe studied waterfowl abundance and diversity in relation to season (wet vs dry), wetland characteristics (vegetation and morphometrics) and land-use in a semi-arid agricultural region of South Africa to determine how waterfowl respond to various wetland characteristics, particularly those of... -
Intraspecific host preferences of mopane moths (Imbrasia belina) in mopane (Colophospermum mopane) woodland
Item type: Journal Article • Journal: African Zoology • Authors: Halszka Hrabar --- Department of Zoology and Entomology, South Africa Dawood Hattas --- Department of Botany, South Africa Johan T. du Toit --- Department of Zoology and Entomology, South AfricaColophospermum mopane trees are a common larval food plant of the mopane moth (Imbrasia belina),which commonly reaches outbreak proportions. Our study investigated factors determining host tree choice by ovipositing mopane moths within a single host species (C. mopane). Tree size... -
Survival and movement of the Congo forest mouse (Deomys ferrugineus): a comparison of primary rainforest and fallow land in Kisangani, Democratic Republic of Congo
Item type: Journal Article • Journal: African Zoology • Authors: Jan Kennis --- Evolutionary Ecology Group, University of Antwerp, Belgium Crespin Laurent --- INRA, UR346 d’Epidémiologie animale, France Nicaise Drazo Amundala --- Animal Ecology and Resource Management Laboratory (LEGERA), University of Kisangani, Democratic Republic of Congo Akaibe Migimiru Dudu --- Animal Ecology and Resource Management Laboratory (LEGERA), University of Kisangani, Democratic Republic of Congo Herwig Leirs --- Evolutionary Ecology Group, University of Antwerp, BelgiumThe Congo forest mouse, Deomys ferrugineus, occurs readily in natural and human-altered habitats in the region of Kisangani (Democratic Republic of Congo). We studied survival and movement patterns of D. ferrugineus in both habitats. Capture-mark-recapture was used to study the... -
Food abundance explains the breeding season of a tropical shorebird, the Crab Plover Dromas ardeola
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Giuseppe De Marchi --- Dipartimento di Scienze della Terra e dell'Ambiente, Italy Giorgio Chiozzi --- Museo Civico di Storia Naturale, Italy Dawit Semere --- Research Division, Eritrea Yohannes Mebrahtu --- Research Division, Eritrea Farhad Hosseini Tayefeh --- Department of the Environment Provincial Office, Iran Mohammed Almalki --- Department of Biology, College of Science, Kingdom of Saudi Arabia Mauro Fasola --- Dipartimento di Scienze della Terra e dell'Ambiente, ItalyThe timing of breeding in birds is a life-history trait that generally depends on food availability, but other factors may play a role, particularly in tropical areas where food availability is less seasonal than in temperate or polar areas. We... -
Benthic macroinvertebrate assemblage composition and distribution pattern in the upper Mthatha River, Eastern Cape, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: AS Niba --- Department of Biological and Environmental Science, South Africa SP Mafereka --- Department of Biological and Environmental Science, South AfricaBenthic macroinvertebrates were sampled and environmental variables measured at Langeni Forest and Kambi Valley, two sites of varying degrees of human impact in the upper Mthatha River, South Africa, in 2010–2011. Four species, Simulium adersi Pomeroy, Baetis harrisoni Barnard, Pseudocloeon... -
Reports of Kroyeria species collected from South African waters with notes on the host–parasite associations
Item type: Journal Article • Journal: African Zoology • Authors: Peter J Mokumo --- Department of Biodiversity, University of Limpopo, South Africa Susan M Dippenaar --- Department of Biodiversity, University of Limpopo, South AfricaThere are 21 species in the genus Kroyeria of which nine have been reported from hosts caught off South Africa. Host–parasite associations were reported for K. dispar, K. papillipes and K. sphyrnae. Kroyeria specimens were collected from the gill filaments... -
Distribution of Contracaecum (Nematoda: Anisakidae) larvae in freshwater fish from the northern regions of South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Sareh Tavakol --- Department of Biodiversity, University of Limpopo, South Africa Willem J Smit --- Department of Biodiversity, University of Limpopo, South Africa Joseph R Sara --- Department of Biodiversity, University of Limpopo, South Africa Ali Halajian --- Department of Biodiversity, University of Limpopo, South Africa Wilmien J Luus-Powell --- Department of Biodiversity, University of Limpopo, South AfricaA total of 1 847 fishes (16 species) from 14 reservoirs in northern and north-eastern regions of South Africa were collected and examined for larval Contracaecum spp. between 2005 and 2013. This study, the first to examine several potential second... -
Baited remote underwater video system (BRUVs) survey of chondrichthyan diversity in False Bay, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: L De Vos --- Marine Research Institute, Department of Biological Sciences, South Africa RGA Watson --- Marine Research Institute, Department of Biological Sciences, South Africa A Götz --- Elwandle Node, South African Environmental Observation Network (SAEON), South Africa CG Attwood --- Marine Research Institute, Department of Biological Sciences, South AfricaGlobal declines in chondrichthyan populations necessitate evidence‑based planning for their conservation. False Bay, in south‑west South Africa, has a high diversity of marine biota, with Atlantic and Indian Ocean influences, but its chondrichthyan fauna is poorly described ecologically. False Bay... -
A comparison of point counts with a new acoustic sampling method: a case study of a bird community from the montane forests of Mount Cameroon
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Ondřej Sedláček --- Department of Ecology, Faculty of Science, Czech Republic Jana Vokurková --- Department of Ecology, Faculty of Science, Czech Republic Michal Ferenc --- Department of Ecology, Faculty of Science, Czech Republic Eric Nana Djomo --- Department of Ecology, Faculty of Science, Czech Republic Tomáš Albrecht --- Department of Zoology, Faculty of Science, Czech Republic David Hořák --- Department of Ecology, Faculty of Science, Czech RepublicAcoustic signals are frequently used for estimating avian species richness, abundance and community composition. However, sampling by traditional methods of bird surveys is often limited by availability of experienced researchers in the field, especially in the tropics. New bioacoustic approaches... -
Introduction, establishment and spread of the Southern mouthbrooder Pseudocrenilabrus philander in the Baakens River, Eastern Cape, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Cuen Muller --- Zoology Department, South Africa Olaf LF Weyl --- South African Institute for Aquatic Biodiversity, South Africa Nadine A Strydom --- Zoology Department, South AfricaThis paper provides evidence for the extralimital establishment and spread of Pseudocrenilabrus philander in the Baakens River, Eastern Cape, South Africa. Since the first occurrence record at a single locality in 1994 this species has now spread throughout the river... -
The role of estuarine type in characterizing early stage fish assemblages in warm temperate estuaries, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: N.A. Strydom --- Department of Ichthyology and Fisheries Science, South Africa A.K. Whitfield --- South African Institute for Aquatic Biodiversity, South Africa T.H. Wooldridge --- Department of Zoology, South AfricaAssemblages of early stage fishes (larval and early juvenile stages) were investigated and compared in seven permanently open and five intermittently open estuarine systems on the warm temperate Eastern Cape coast of South Africa. Estuarine type, by virtue of mouth... -
Molecular and bioacoustic divergence in Mantidactylus granulatus and M. zavona n.sp. (Anura: Mantellidae): bearings for the biogeography of northern Madagascar
Item type: Journal Article • Journal: African Zoology • Authors: Miguel Vences --- Institute for Biodiversity and Ecosystem Dynamics, Netherlands Franco Andreone --- Museo Regionale di Scienze Naturali, Sezione di Zoologia, Italy Frank Glaw --- Zoologische Staatssammlung, Germany Jasmin E. Randrianirina --- Parc Botanique et Zoologique de Tsimbazaza, MadagascarWe analysed the genetic and bioacoustic variability in Mantidactylus granulatus, a semi arboreal frog species endemic to the northern portion of Madagascar. Advertisement calls had a longer note duration in northeastern as compared to northwestern populations. Specimens from mid altitudes... -
>Utilization of shallow subtidal bays associated with warm temperate rocky shores by the late-stage larvae of some inshore fish species, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Nadine A. Strydom --- South African Institute for Aquatic Biodiversity, South Africa>This work describes the utilization of shallow, subtidal bays, associated with rocky shores, by the late-stage larvae and early juveniles of some common inshore fishes. Larval and early juvenile fishes were collected in seven small bays (30–50 m wide) between... -
Ecology of metazoan parasites of Clarias gariepinus (Osteichthyes: Clariidae) from the Nwanedi-Luphephe Dams of the Limpopo River System, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: G.N. Madanire-Moyo --- Department of Biodiversity, South Africa W.J. Luus-Powell --- Department of Biodiversity, South Africa P.A.S. Olivier --- Department of Biodiversity, South AfricaA total of 7748 parasites, belonging to 17 metazoan species, was recorded from 45 specimens of Clarias gariepinus (Burchell, 1822) caught from the Nwanedi-Luphephe Dams, Limpopo River System, South Africa. All host specimens were parasitized by one or more metazoan... -
Effects of a fast-burning spring fire on the ground-dwelling spider assemblages (Arachnida: Araneae) in a central South African grassland habitat
Item type: Journal Article • Journal: African Zoology • Authors: Charles R Haddad --- Department of Zoology and Entomology, South Africa Stefan H Foord --- Department of Zoology, Chair in Biodiversity Value and Change, South Africa René Fourie --- Department of Zoology and Entomology, South Africa Anna S Dippenaar-Schoeman --- Biosystematics: Arachnology, Agricultural Research Council–Plant Protection Research Institute, South AfricaFire is widely used as a management strategy in grasslands to maintain vegetation structure and improve grazing quality for large herbivores. The impacts of burning on invertebrates in South Africa remain poorly understood. A study was initiated in spring 2005... -
Siphonostomatoid copepods infecting Squalus acutipinnis Regan, 1908 off South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SM Dippenaar --- Department of Biodiversity, South Africa RA Molele --- Department of Biodiversity, South AfricaSqualus acutipinnis (previously included in S. megalops) individuals caught off the east, south and west coasts of South Africa were examined for siphonostomatoid copepod infection. Collected siphonostomatoids were fixed and preserved in 70% ethanol and studied under microscopes using both... -
Seasonal elevational movements of Eastern Olive Sunbird
Cyanomitra olivacea in the Uluguru Mountains, TanzaniaItem type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Chacha Werema --- Department of Zoology and Wildlife Conservation, TanzaniaLittle is known about the seasonal elevational movements for most tropical avifauna species. Seasonal elevational movements of the Eastern Olive Sunbird Cyanomitra olivacea were studied along an elevational gradient from 600 to 1 500 m above sea level in the Uluguru... -
Influence of prey abundance and abiotic factors on the long-term home-range and movement dynamics of spotted grunter Pomadasys commersonnii in an intermittently open estuary
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: BA Maree --- Department of Ichthyology and Fisheries Science, South Africa PD Cowley --- Department of Ichthyology and Fisheries Science, South Africa TF Næsje --- South African Institute for Aquatic Biodiversity, South Africa A-R Childs --- Department of Ichthyology and Fisheries Science, South Africa AI Terörde --- Arcus Consulting, South Africa EB Thorstad --- Norwegian Institute for Nature Research, NorwayLong-term home-range and movement dynamics of spotted grunter Pomadasys commersonnii and the distribution of their dominant prey, the sandprawn Callichirus kraussi, were investigated in the intermittently open East Kleinemonde Estuary, South Africa. In addition, the effects of fish length, diel... -
Comparative performance of four survey methods for assessing Lilian’s Lovebird abundance in Liwonde National Park, Malawi
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Tiwonge I Mzumara --- School of Life Sciences, South Africa Michael R Perrin --- School of Life Sciences, South Africa Colleen T Downs --- School of Life Sciences, South AfricaMonitoring abundance of threatened species is important for conservation planning. Lilian’s Lovebird Agapornis lilianae is a near-threatened small parrot found in mopane Colophospermum mopane woodland. Its population has not been investigated in any part of its range. We investigated the... -
Population estimates of the breeding birds of the Tinhosas islands (Gulf of Guinea), the only major seabird colony of the eastern tropical Atlantic
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Simon Valle --- Division of Biology and Conservation Ecology, School of Science and the Environment, UK Nuno Barros --- Portuguese Society for the Study of Birds, Marine Department, Portugal Iván Ramírez --- BirdLife International, Belgium Ross M Wanless --- Seabird Division, BirdLife South Africa, South AfricaThe Tinhosas islands, in São Tomé e Príncipe, host the most important seabird breeding colony in the Gulf of Guinea, but information on its conservation status was hitherto unpublished or anecdotal, the last assessment having been performed in 1997. A... -
Wintering waterbird assemblages in the central part of the Gulf of Gabès in southern Tunisia
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Foued Hamza --- Département des Sciences de la Vie, Faculté des Sciences de Gabès, Tunisia Abdessalem Hammouda --- Département des Sciences de la Vie, Faculté des Sciences de Gabès, Tunisia Slaheddine Selmi --- Département des Sciences de la Vie, Faculté des Sciences de Gabès, TunisiaAlthough the Gulf of Gabès is recognised as an Important Bird Area, several aspects of the ecology of waterbirds inhabiting this area still need to be investigated. We observed how waterbird foraging guilds varied among habitats. In total, 49 species... -
How well do bird atlas reporting rates reflect bird densities? Correlates of detection from the Fynbos biome, South Africa, with applications for population estimation
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Alan TK Lee --- Climate Change BioAdaptation, Kirstenbosch Research Centre, South Africa Phoebe Barnard --- Climate Change BioAdaptation, Kirstenbosch Research Centre, South AfricaRelationships between true population densities and reporting indices from atlas data are important for the calculation of population sizes, though these relationships are remarkably little-known and likely confounded by issues of detection. We examine issues of detection for a single-observer... -
Temporal dynamics and relationship between climate, limnological variables and zooplankton composition in climate-sensitive Lake Bosumtwi, Ghana
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: PO Sanful --- Department of Fisheries and Water Resources, School of Natural Resources, Ghana S Aikins --- Department of Theoretical and Applied Biology, Ghana E Frempong --- Department of Theoretical and Applied Biology, Ghana RI Hall --- Department of Biology, Canada RE Hecky --- Biology Department and Large Lakes Observatory, USAThe community composition and the factors affecting seasonal and interannual dynamics of zooplankton in Lake Bosumtwi were studied biweekly at a central index station during 2005 and 2006. The lake zooplankton community was species poor. Mesocyclops bosumtwii was numerically superior... -
Estimating Cape hare occupancy and abundance in southern Tunisia using spotlighting data
Item type: Journal Article • Journal: African Zoology • Authors: Chammem Mohsen --- Laboratoire d’Elevage et de la Faune Sauvage, Tunisia Karssene Yamna --- Laboratoire d’Elevage et de la Faune Sauvage, Tunisia Jarray Mohsen --- Laboratoire d’Elevage et de la Faune Sauvage, Tunisia Khorchani Touhami --- Laboratoire d’Elevage et de la Faune Sauvage, TunisiaThis study outlines the importance of integrating spotlighting data and occupancy modelling to estimate the spatial occupancy, abundance and habitat preferences of Cape hares Lepus capensis in southern Tunisia. Exploring the spatial distribution pattern of this species is problematic because... -
Phytoplankton primary productivity seasonality and changes in a small African lake, Lake Hora-Kilole, Ethiopia
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: R Abate --- Aquatic Sciences, Fisheries and Aquaculture Stream, Department of Zoological Sciences, China D Kifle --- Aquatic Sciences, Fisheries and Aquaculture Stream, Department of Zoological Sciences, Ethiopia YH Gao --- School of Life Sciences and State Key Laboratory of Marine Environmental Science, ChinaThe seasonality of primary productivity by phytoplankton in relation to physico-chemical and biological variables was studied in Lake Hora-Kilole from August 2007 to May 2008. In 1989, the Mojo River was temporarily diverted to flow into the lake, which substantially... -
Benthic freshwater nematode community dynamics under conditions of Tilapia aquaculture in Egypt
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: AEA Abada --- Zoology Department, Egypt NF Ghanim --- Zoology Department, Egypt AH Sherif --- Department of Fish diseases, Kafrelsheikh Provincial Laboratory, Egypt NA Salama --- Zoology Department, EgyptStudies of the influence of fish aquaculture on benthic freshwater nematode assemblages are scarce, but could provide a way of gauging environmental effects. The abundance and diversity of nematode assemblages in response to Oreochromis niloticus aquaculture were investigated in Kafr... -
Two cases of probable hybridisation between the pufferfishes Arothron meleagris (Anonymous 1798) and A. nigropunctatus (Bloch and Schneider 1801) on a fringing reef at Réunion Island
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: P Bourjon --- Les Sentinelles du Récif, réseau d’observateurs volontaires de la Réserve Naturelle Marine de La Réunion [‘Sentinels of the Reef’, Volunteer Observers Network of the Réunion Marine Park] (GIP–RNMR), Réunion Island B Chanet --- Institut de Systématique, FranceTwo individuals displaying mixed features of the colour patterns distinctive of Arothron meleagris and A. nigropunctatus were observed on the fringing reef at Réunion Island, between September 2012 and August 2013. Because many hybrid fish have been first identified through... -
Multi-stakeholder collaboration yields valuable data for cetacean conservation in Gamba, Gabon
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: G Minton --- WWF Gabon, Gabon JR Kema Kema --- WWF Gabon, Gabon A Todd --- Gabon Biodiversity Program, Center for Conservation and Sustainability, Gabon L Korte --- Gabon Biodiversity Program, Center for Conservation and Sustainability, Gabon PB Maganga --- WWF Gabon, Gabon JR Migoungui Mouelet --- Brigade de Peche de Gamba/Department des Pêches et d’Aquaculture, Gabon AM Nguema --- Agence National des Parc Nationaux, Gabon E Moussavou --- Brigade de Peche de Gamba/Department des Pêches et d’Aquaculture, Gabon GK Nguélé --- Agence National des Parc Nationaux, GabonPrivate industry, the Government of Gabon and two international NGOs collaborated to conduct marine surveys off the coast of Gabon, Central Africa. Surveys addressed multiple objectives of surveillance and monitoring, the documentation of the distribution of and threats to the... -
The impact of river flooding and high flow on the demersal fish assemblages of the freshwater-dominated Great Fish Estuary, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: P Nodo --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa NC James --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa A-R Childs --- Department of Ichthyology and Fisheries Science, South Africa MDV Nakin --- Department of Biological and Environmental Sciences, South AfricaFreshwater inflow has a strong impact on the biological, chemical and physical characteristics of estuaries, which in turn affect the distribution and abundance of estuarine organisms. Increased climatic variability associated with climate change is predicated to modify precipitation patterns, which... -
Wood anatomical and chemical properties related to the pulpability of Eucalyptus globulus: a review
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Isabel Carrillo --- Laboratorio de Recursos Renovables, Centro de Biotecnología, Chile Claudia Vidal --- Laboratorio de Recursos Renovables, Centro de Biotecnología, Chile Juan P Elissetche --- Laboratorio de Recursos Renovables, Centro de Biotecnología, Chile Regis T Mendonça --- Laboratorio de Recursos Renovables, Centro de Biotecnología, ChileEucalyptus globulus is one of the most important hardwood species used by the pulp and paper industry due to its high pulp yield, high wood density, excellent fibre quality and good handsheet properties. However, the wood is a highly variable... -
Suppression of the aquatic weed Hydrilla verticillata (L.f.) Royle (Hydrocharitaceae) by a leaf-cutting moth Parapoynx diminutalis Snellen (Lepidoptera: Crambidae) in Jozini Dam, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: A Bownes --- Agricultural Research Council Plant-Protection Research Institute (ARC-PPRI), South AfricaA classical biological control programme against Hydrilla verticillata (L.f.) Royle (Hydrocharitaceae) was initiated in South Africa following the discovery of extensive mats in Jozini Dam in northern KwaZulu-Natal (KZN) in 2006. However, in mid-2008, high densities of a phytophagous insect,... -
Seasonality, habitat type and locality influenced bird assemblage structure in Nigeria
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Sulaiman I Muhammad --- Department of Biological Sciences, Nigeria Rosli Ramli --- Institute of Biological Sciences, Faculty of Science, Malaysia Amy Y Then --- Institute of Biological Sciences, Faculty of Science, MalaysiaThis is the first report of the avian assemblage in the study area of Dutse, Nigeria. In addition to recording bird species, the effects of season, dominant vegetation structure, locality and anthropogenic activities on bird abundance, species richness and diversity... -
Population fluctuations of Cerithidea decollata (Gastropoda: Potamididae) in mangrove habitats of the St Lucia Estuary, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: JL Raw --- , South Africa GM Rishworth --- , South Africa R Perissinotto --- , South Africa JB Adams --- , South AfricaMangrove macrobenthos species are used as ecological indicators as they are sensitive to changes in sediment properties. In this study, the population density of the common mangrove whelk Cerithidea decollata was assessed during different environmental conditions in the St Lucia... -
Densities and population sizes of raptors in Uganda’s conservation areas
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Derek Pomeroy --- Department of Zoology, Uganda Micheal Kibuule --- Department of Zoology, Uganda Dianah Nalwanga --- NatureUganda, Uganda George Kaphu --- Uganda Wildlife Authority, Uganda Michael Opige --- NatureUganda, Uganda Phil Shaw --- School of Biology, UKProjected increases in Africa's human population over the next 40 years point to further, large-scale conversion of natural habitats into farmland, with far-reaching consequences for raptor species, some of which are now largely restricted to protected areas (PAs). To assess... -
Spatial considerations when monitoring reef fishes
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: D Parker --- Branch: Fisheries Management, Department of Agriculture, Forestry and Fisheries (DAFF), South Africa H Winker --- Branch: Fisheries Management, Department of Agriculture, Forestry and Fisheries (DAFF), South Africa ATF Bernard --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa MKS Smith --- South African National Parks, Rondevlei Scientific Services, South Africa A Götz --- South African Environmental Observation Network (SAEON), South AfricaSpatial dependence can obscure relationships between response and explanatory variables because of structuring within the residuals reducing variance and biasing coefficient estimates. Here, we highlight the influence of the spatial component, in the presence of spatial dependence, on abundance trends... -
Diatoms associated with two South African kelp species: Ecklonia maxima and Laminaria pallida
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: NAS Mayombo --- Department of Biodiversity and Conservation Biology, South Africa R Majewska --- Unit for Environmental Sciences and Management, School of Biological Sciences, South Africa AJ Smit --- Department of Biodiversity and Conservation Biology, South AfricaKelp forests are believed to host a large biomass of epiphytic fauna and flora, including diatoms, which constitute the base of aquatic food webs and play an important role in the transfer of energy to higher trophic levels. Epiphytic diatom... -
Effects of human disturbance and altitudinal gradient on myriapod species richness and abundance at Mount Kala, central Cameroon
Item type: Journal Article • Journal: African Zoology • Authors: PS Mbenoun Masse --- Laboratoire de Zoologie, Cameroon SD Makon --- Laboratoire de Zoologie, CameroonMyriapods are remarkably diverse and encompass many endemic species, yet they remain poorly studied in Cameroon. We investigated the influence of anthropogenic activities on myriapod assemblage structures along an altitudinal gradient at Mount Kala. Myriapods were collected by pitfall trapping,... -
The influence of pruning height on symbiotic nitrogen fixation in a tree-based fodder production system
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Thabo I Makhubedu --- School of Agricultural, Earth and Environmental Sciences, South Africa Brigid A Letty --- School of Agricultural, Earth and Environmental Sciences, South Africa Paramu L Mafongoya --- School of Agricultural, Earth and Environmental Sciences, South Africa Peter F Scogings --- School of Life Sciences, South AfricaWoody species, especially dinitrogen-fixing species, can provide multiple products including food, fuelwood and fodder. In cut-and-carry silvopastoral systems, woody trees are often severely pruned for harvesting nitrogen (N)-rich fodder. However, very few studies have assessed the influence of this management... -
Bucking the trend: the African Black Oystercatcher as a recent conservation success story
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Mark Brown --- School of Life Sciences, South Africa Brittany Arendse --- Nature’s Valley Trust, Nature’s Valley, South Africa Bruno Mels --- Nature’s Valley Trust, Nature’s Valley, South Africa Alan TK Lee --- School of Life Sciences, South AfricaThe African Black Oystercatcher Haematopus moquini is a charismatic, southern African near-endemic, wader species, that is often seen as a flagship species for coastal bird conservation, as it was recently down-listed regionally to Least Concern on the IUCN Red List... -
Monitoring the effects of spatial protection on the reef fish communities of the Pondoland Marine Protected Area, Eastern Cape Province, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: BQ Mann --- , South Africa JQ Maggs --- , New Zealand SN Porter --- , South Africa WN Dalton --- , South AfricaMonitoring marine protected areas (MPAs) is critical for evaluating their effectiveness and for improving management. In this study, a single-camera baited remote underwater video system (mono-BRUVS) was deployed quarterly at four sites (10–30-m depths) to quantify the reef fish communities... -
Seasonal abundance and distribution of Red-capped Robin Chat Cossypha natalensis in the Eastern Arc Mountains, Tanzania
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Chacha Werema --- , TanzaniaIn Africa, the migratory status of the Red-capped Robin Chat Cossypha natalensis is still not well understood. In some areas, this species has been regarded as either a full or a partial migrant, whereas in other parts of its range,... -
Changing patterns of Schistosoma host snail population densities in Maun, Botswana
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: MJ Chimbari --- , South Africa C Kalinda --- , South Africa N Siziba --- , ZimbabweChanges in the inflow of water into the Thamalakane River had been predicted to alter snail population dynamics and influence the risk of schistosomiasis transmission in Maun. We determined the abundance of schistosome intermediate host snails along the Thamalakane River... -
The role of size and number of forest patches in the conservation of bird species in a fragmented landscape
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Kwaku Brako Dakwa --- , Ghana Bright Opoku --- , Ghana Judith Toku --- , GhanaWe used presence data to evaluate the role of small patches in bird conservation in the Cape Coast Metropolis of Ghana by surveying 24 forest patches. Cumulative species-area and number curves were plotted by ordering patch size from large to... -
Intercolony health evaluation of wild African penguins Spheniscus demersus, in relation to parasites, along the southwest coast of South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: MPA Espinaze --- , South Africa C Hui --- , South Africa L Waller --- , South Africa S Matthee --- , South AfricaClinical parameters of African penguins Spheniscus demersus have been recorded mostly from birds admitted to rehabilitation centres and are typically presented as mean values across a region. It is uncertain whether these values are representative of wild penguins and whether... -
Common dolphin Delphinus delphis occurrence off the Wild Coast of South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Caputo --- , South Africa PW Froneman --- , South Africa S Plön --- , South AfricaDespite their typical large group sizes, limited research exists on the occurrence of common dolphins Delphinus delphis because of the pelagic, offshore nature of this species and the lack of barriers to their movement in this environment. The main purpose... -
Population and breeding patterns of the pest rodent: Mastomys natalensis in a maize dominated agroecosystem in Lake Victoria crescent zone, Eastern Uganda
Item type: Journal Article • Journal: African Zoology • Authors: Alex Mayamba --- , Uganda Robert Modest Byamungu --- , Tanzania Herwig Leirs --- , Belgium Isabirye Moses --- , Uganda Rhodes H Makundi --- , Tanzania Didas N Kimaro --- , Tanzania Apia W Massawe --- , Tanzania David Kifumba --- , Uganda Alice Nakiyemba --- , Uganda Mshaka E Mdangi --- , Tanzania Brian E Isabirye --- , Kenya Loth S Mulungu --- , TanzaniaMultimammate mice (Mastomys natalensis) are a key rodent pest species to cereal crop production in Sub-Saharan Africa. This study aimed at generating information on the population fluctuation and breeding patterns of M. natalensis in a maize dominated agro-ecosystem in the... -
Species composition and distribution of mayflies (Ephemeroptera) in relation to land use systems along the Thika River, Kenya
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: C Maina --- , Kenya BM Mwangi --- , Kenya JJ Jumbe --- , KenyaMayflies (order Ephemeroptera) are widely distributed and commonly used in biological assessment of water quality because of their sensitivity. Their application as bio-indicators in tropical streams and rivers, however, is hampered by lack of adequate information about their status in... -
Stakeholders’ perceptions of mammal occurrence and abundance on agricultural properties bordering the Boland Mountain Complex, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Willem A Nieman --- , South Africa Brittany C Schultz --- , South Africa Anita Wilkinson --- , South Africa Alison J Leslie --- , South AfricaThe encroachment of agricultural landscapes on natural ecosystems poses a significant threat to native wildlife persistence. In the Boland Mountain Complex (BMC), the presence of mammals was well documented in the 20th century, but an updated account is lacking. This... -
Short-term recovery of macroinvertebrate communities following a flash flood in an urban river: a case study of the Palmiet River in Durban, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: N Khumalo --- , South Africa S Mdluli --- , South Africa J Lebepe --- , South AfricaExtreme floods have become frequent in the urban Palmiet River due to exacerbating climate change. Therefore, the current study aimed to explore a short-term recovery of macroinvertebrate communities following a flash flood in the Palmiet River, KwaZulu-Natal, South Africa. Different... -
Rotifers in the Niger River, Niger: diversity and abundance in relation to environmental parameters
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: H Souley Adamou --- , France B Alhou --- , Niger M Tackx --- , France F Azémar --- , FranceA first study of the rotifers of the Niger River in Niger is reported here. Two surveys took place under contrasting hydrological conditions: low-water level (16 April to 8 May 2018) and high-water level (1 to 15 February 2019). Zooplankton... -
The effect of rainbow trout (Oncorhynchus mykiss) invasions on native fish communities in the subtropical Blyde River, Mpumalanga province, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Lerato T Maimela --- , South Africa Christian T Chimimba --- , South Africa Tsungai A Zengeya --- , South AfricaThis study investigated the effects of rainbow trout (Oncorhynchus mykiss) invasion on native fish communities in the upper Blyde River catchment. A fish survey was undertaken between September 2017 and October 2018 from 11 sites in the Blyde and Treur... -
Small mammal species diversity and distribution in the Selous ecosystem, Tanzania
Item type: Journal Article • Journal: African Zoology • Authors: Aenea Saanya --- , United Republic of Tanzania Apia Massawe --- , United Republic of Tanzania Rhodes Makundi --- , United Republic of TanzaniaThreats to ecosystems are ever increasing from different drivers mostly being linked to anthropogenic activities. This has brought about various measures to restore/protect the wildlife in these areas. Considering the background of most protected areas in East Africa, small mammals... -
Weed species composition and abundance in the main coffee production systems and regions of Ethiopia
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Abera Daba --- , Ethiopia Mekuria Tadesse --- , Ethiopia Selamawit Negassa Chawaka --- , Ethiopia Gezahegn Berecha --- , EthiopiaA weed population survey was carried out to assess the variability in weed species composition and abundance in the main coffee production systems and regions of Ethiopia. A total of 168 coffee fields were assessed using a quadrat count in... -
Primate diversity and species’ distributions in Maze National Park, southern Ethiopia
Item type: Journal Article • Journal: African Zoology • Authors: Muluneh Dansa --- , Ethiopia Wondimagegnehu Tekalign --- , EthiopiaInformation on animal diversity and distribution is essential for designing management plans for conservation. This study aimed to investigate primate diversity and species’ distributions in the Maze National Park, southern Ethiopia. The study was conducted during the dry season (January–March)... -
Aspects of the nonbreeding ecology of the Tree Pipit Anthus trivialis in and around Amurum Forest Reserve, Jos Plateau, Nigeria
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Taiwo A Adams --- University of Jos Biological Conservatory, Nigeria Samuel T Ivande --- University of Jos Biological Conservatory, Nigeria Mark Wilson --- , United KingdomTo advance our knowledge about the nonbreeding ecology of the Tree Pipit Anthus trivialis, this study investigated its population dynamics, habitat utilisation and foraging behaviour, from October to December 2018, in and around the Amurum Forest Reserve, located in the... -
The chemistry of the pedoderm – part 4: grasslands and savannas within Mokala National Park, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Anthony J Mills --- , South Africa Klaus Kellner --- , South AfricaTreed savannas and treeless grasslands occur across Mokala National Park, South Africa. To identify soil properties potentially underpinning these marked differences in vegetation structure, we analysed the soil chemistry of 27 composite pedoderm samples in both savannas and grasslands. Savannas... -
Herpetofaunal utilisation of riparian buffer zones in an agricultural landscape near Mtunzini, South Africa
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: Bryan Maritz --- University of the Witwatersrand, South Africa GrahamJ. Alexander --- University of the Witwatersrand, South AfricaWe measured herpetofaunal species richness and abundance in riparian and non‐riparian habitats of an agriculture‐dominated landscape to compare herpetofaunal utilisation of these two habitat types. Riparian areas hosted higher mean species richness and abundance than non‐riparian areas. Riparian and non‐riparian... -
Breaking ground: Quantitative fossorial herpetofaunal ecology in South Africa
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Bryan Maritz --- University of the Witwatersrand, South Africa GrahamJ. Alexander --- University of the Witwatersrand, South AfricaBasic ecological data are lacking for many species of herpetofauna, particularly fossorial species. Quantitative analyses of the factors that may influence the occurrence of fossorial herpetofaunal species are rare, with minimal work conducted in southern Africa. We mapped the absolute... -
Estimating population changes in humpback whales Megaptera novaeangliae migrating past Cape Vidal, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: C Wilkinson --- Cape Peninsula University of Technology, South Africa E Seyboth --- Cape Peninsula University of Technology, South Africa J Olbers --- , South Africa E Vermeulen --- University of Pretoria, South Africa R Kramer --- WILDTRUST, South Africa K Findlay --- Cape Peninsula University of Technology, South AfricaShore-based surveys of humpback whales Megaptera novaeangliae were performed from Cape Vidal, on the east coast of South Africa (iSimangaliso Marine Protected Area, Indian Ocean), from two independent platforms between 27 June and 7 August in 2018 and 2019, to... -
Diversity of euglenoids in a drinking water source in Burkina Faso (West Africa): implications for sustainability and water quality
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Minata Ouattara --- University Joseph Ki-Zerbo, Burkina Faso Frédéric Zongo --- University Joseph Ki-Zerbo, Burkina Faso Bilassé Zongo --- University Joseph Ki-Zerbo, Burkina FasoEuglenophyta are a group of algae that occur in water polluted by organic matter, which makes them a good indicator for organic pollution. This study aimed to determine the diversity of Euglenophyta, the environmental conditions favourable to their development and... -
Spatio-temporal variation in phytoplankton community structure in backwaters of the Ketar River, central Ethiopia
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Yadesa Chibsa --- Wachemo University, Ethiopia Seyoum Mengistou --- Addis Ababa University, Ethiopia Demeke Kifle --- Addis Ababa University, EthiopiaThis study assessed the spatio-temporal dynamics of the phytoplankton community in backwaters of the Ketar River, central Ethiopia, in relation to water quality and macrophyte coverage. Phytoplankton samples and physicochemical information were collected at six sites along the river over... -
The effects of suspended bivalve culture on benthic community structure and sediment fluxes in Saldanha Bay, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: TA Probyn --- Fisheries and the Environment (DFFE), South Africa M Pretorius --- Fisheries and the Environment (DFFE), South Africa F Daya --- Fisheries and the Environment (DFFE), South Africa A du Randt --- Fisheries and the Environment (DFFE), South Africa A Busby --- Fisheries and the Environment (DFFE), South AfricaThis study provides a follow-up to prior measurements of the impact of mussel Mytilus galloprovincialis farming on benthic macrofauna and biogeochemistry and includes the first measurements of the effect of oyster Crassostrea gigas farming in Saldanha Bay, South Africa. The... -
Population size, habitat use and foraging habits of wild Helmeted Guineafowl Numida meleagris in southwestern Ethiopia
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Yihenew Aynalem --- Addis Ababa University, Ethiopia Afework Bekele --- Addis Ababa University, Ethiopia Bezawork Afework Bogale --- Addis Ababa University, EthiopiaThe Helmeted Guineafowl Numida meleagris is a widespread and abundant resident gamebird species in sub-Saharan Africa. It is hunted throughout the region, including in Ethiopia. However, knowledge of the species’ ecology and behaviour in many parts of the country is... -
Geographical and seasonal patterns in the diet of Cape fur seals Arctocephalus pusillus pusillus in Namibia, based on extensive scat analyses
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: DN Mwaala --- University of Namibia, Namibia MR Wilhelm --- University of Namibia, Namibia SP Kirkman --- Fisheries and the Environment (DFFE): Branch Oceans and Coasts, South Africa J-P Roux --- Ministry of Fisheries and Marine Resources, NamibiaNamibia's population of Cape fur seals Arctocephalus pusillus pusillus is a major constituent of top predator biomass in the northern Benguela upwelling system. Understanding their diet is key to comprehending their role in the ecosystem and potential drivers of recent... -
Spatial patterns and environmental drivers of demersal fish assemblages in the Swartkops and Sundays estuarine to marine seascapes, South Africa
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: P Nodo --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa AR Childs --- Rhodes University, South Africa P Pattrick --- Nelson Mandela University, South Africa NC James --- South African Institute for Aquatic Biodiversity (SAIAB), South AfricaEstuaries are often observed as the boundary between the ocean and the river, separating coastal environments, rather than being seen as a continuum. Owing to insufficient research on demersal fish communities across nearshore marine to estuarine habitats, particularly in South... -
Influence of physico-chemical parameters on benthic macroinvertebrate community dynamics in Isiukhu River, Kenya
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Emmanuel Mzungu --- Kenya Fisheries Service (Western Region), Kenya William A Shivoga --- Masinde Muliro University of Science and Technology, Kenya Dorothy K Lukhabi --- Africa Centre of Excellence in Coastal Resilience (ACECoR), Ghana Anthony W Sifuna --- Masinde Muliro University of Science and Technology, KenyaThe current study investigated the influence of physico-chemical parameters on macroinvertebrates distribution, abundance and diversity throughout the Isiukhu River. The sampling sites were selected along the Isiukhu River based on distinct land use types at the upstream, midstream and downstream... -
Occurrence and persistence of Blacksmith Lapwings Vanellus armatus and Crowned Lapwings V. coronatus and their reproductive success in an urban mosaic landscape
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Feziwe Phoswa --- School of Life Sciences, University of KwaZulu-Natal, South Africa S Thobeka Gumede --- School of Life Sciences, University of KwaZulu-Natal, South Africa Colleen T Downs --- School of Life Sciences, University of KwaZulu-Natal, South AfricaUrbanised landscapes continue to expand globally, leading to increased habitat fragmentation, which creates a mosaic of natural and managed landscapes. These environmental changes have an impact on bird populations, and are reflected in the declining populations of open-habitat species. Despite... -
Effects of forest cover and fragmentation on bird functional guilds in understorey birds in shade coffee habitats of southwest Ethiopia
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Gelaye Gebremichael --- College of Natural Sciences, Jimma University, Ethiopia Anagaw Atickem --- Colleges of Natural Sciences, Addis Ababa University, Ethiopia Seid Tiku Mereta --- Jimma University, Ethiopia Luc Lens --- Ghent University, BelgiumHabitat loss and fragmentation, as consequences of anthropogenic land use changes, are the main drivers of global biodiversity loss. In this study, we evaluate the response of functional guilds in forest understorey bird communities to the amount of forest cover... -
Cape Gannet Morus capensis year-round presence off the southern Cape coast of South Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Zanri Strydom --- , South Africa Tiaan Strydom --- , South AfricaThe year-round presence and abundance of Cape Gannets Morus capensis in the greater Wilderness waters (Western Cape, South Africa) were monitored through a land-based observational study, 330 km (straight-line distance) from the nearest breeding colony, Bird Island Algoa Bay. Between... -
Updates on population status of vultures in Nazinga Game Ranch, Burkina Faso
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Clément Daboné --- Animal Biology and Ecology, University Centre of Tenkodogo/Thomas Sankara University, Burkina Faso Idrissa Ouédraogo --- Laboratory of Animal Biology and Ecology, Joseph Ki-Zerbo University, Burkina Faso Idrissa Ouédraogo --- Laboratory of Animal Biology and Ecology, Joseph Ki-Zerbo University, Burkina Faso Adama Ouéda --- Laboratory of Animal Biology and Ecology, Joseph Ki-Zerbo University, Burkina Faso Wendengoudi Guenda --- Laboratory of Animal Biology and Ecology, Joseph Ki-Zerbo University, Burkina Faso Peter DM Weesie --- Integrated Research on Energy, Environment and Society, University of Groningen, The NetherlandsIn the early 2000s, the ornithological community was alerted to the vulture population decline in West Africa. Since then, the situation of vultures in this area has not been updated, specifically in Burkina Faso’s protected areas. To find out more,...