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THE FOOD OF BARBUS MATTOZI GUIMARAES. 1884, (PISCES: CYPRINIDAE) IN A ZIMBABWE IMPOUNDMENT
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: B.G. Donnelly --- , ZimbabweThe food from the gut contents of 853 Barbus mattozi of various sizes were examined and analysed. The results showed a dietary transition from planktonivorous and omnivorous to piscivorous with increasing size of fish. At sizes larger than 230 nm... -
A COMPARISON OF CYPRINID FISH POPULATIONS IN THREE LARGE TRANSKEI RESERVOIRS WITH RESPECT TO ABUNDANCE AND REPRODUCTION
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: M. Schramm --- Zoology Department, South AfricaGill net catches of fish in three turbid reservoirs (Lakes Xonxa and Lubisi on the Kei River system and Lake Umtata on the Mtata River) between 1982 and 1985 were dominated by two cyprinids the common carp, Cyprinus carpio, and... -
GENETIC VARIATION BETWEEN FOUR WHITEFISH BARBUS ANDREWI (PISCES: CYPRINI-DAE) POPULATIONS AND POSSIBLE IMPLICATIONS FOR CONSERVATION MANAGEMENT
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: N. D. Impson --- , P. Bloomer --- , ,The endemic whitefish, Barbus andrewi, from the Western Cape Province of South Africa is threatened due to the impacts of predatory alien fishes and unsustainable use of its riverine habitat. A study was undertaken to determine the extent of genetic... -
The biology of Barbus mattozi Guimaraes (Teleostei: Cyprinidae) in a Zimbabwean reservoir 4: Reproduction
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: BG Donnelly BE MarshallSpawning of Barbus mattozi in the Mtsheleli Dam, Zimbabwe, is highly seasonal and timed to take place with the first floods. In December 1974, the Mtsheleli River flooded after heavy rain and the entire adult population of B. mattozi migrated... -
The biology of Barbus mattozi Guimaraes (Teleostei: Cyprinidae) in a Zimbabwean reservoir. 2. Growth
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: BG Donnelly --- Department of National Parks and Wildlife Management, Zimbabwe BE Marshall --- Department of Biological Sciences, ZimbabweThe growth of Barbus mattozi was investigated in the Mtsheleli Dam, a small Zimbabwean reservoir. Scale rings were found to be a suitable method of determining growth, the rings being laid down in October, just before the rainy season. There... -
Predicting the potential distribution of invasive silver carp Hypophthalmichthys molitrix in South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: N Lübcker --- Department of Zoology and Entomology, South Africa TA Zengeya --- Department of Zoology and Entomology, South Africa J Dabrowski --- Department of Paraclinical Sciences, Faculty of Veterinary Science, South Africa MP Robertson --- Department of Zoology and Entomology, South AfricaPredicting the potential geographical distribution and spread of non-native species is of major concern to ecologists. Silver carp Hypophthalmichthys molitrix, ranked as one of the world's 100 worst invasive species, were introduced into South Africa in 1975, but the potential... -
Deep genetic divergence between geographically isolated populations of the goldie barb (Barbus pallidus) in South Africa: potential taxonomic and conservation implications
Item type: Journal Article • Journal: African Zoology • Authors: Albert Chakona --- South African Institute for Aquatic Biodiversity, South Africa Willem S Malherbe --- South African Institute for Aquatic Biodiversity, South Africa Gavin Gouws --- South African Institute for Aquatic Biodiversity, South Africa Ernst R Swartz --- South African Institute for Aquatic Biodiversity, South AfricaBarbus pallidus as it is presently defined has a disjunct distribution that is divided between northern and southern populations in South Africa. Sequence data from the cytochrome b gene region showed two distinct lineages that correspond to these geographically distant... -
New evidence of homoplasy within the African genus Varicorhinus (Cyprinidae): an independent origin of specialized scraping forms in the adjacent drainage systems of Ethiopia inferred from mtDNA analysis
Item type: Journal Article • Journal: African Zoology • Authors: Boris A. Levin --- Institute of Biology of Inland Waters, Russian Academy of Sciences, Russia Alexander S. Golubtsov --- Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, Russia Yuri Yu. Dgebuadze --- Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, Russia Nikolai S. Mugue --- Koltsov Institute of Developmental Biology, Russian Academy of Sciences, RussiaInterrelationships of the two specialized scraping periphyton-feeders, Varicorhinus beso and V. jubae, and some large African barbs, Labeobarbus spp., inhabiting three main regions of Ethiopia (the Western and Eastern Plateaus, and the Rift Valley separating them) were investigated using the... -
Validation of growth zone deposition in otoliths of two large endemic cyprinids in Lake Gariep, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Henning Winker --- Department of Ichthyology and Fisheries Science, South Africa Bruce R. Ellender --- Department of Ichthyology and Fisheries Science, South Africa Olaf L.F. Weyl --- South African Institute for Aquatic Biodiversity, South Africa Anthony J. Booth --- Department of Ichthyology and Fisheries Science, South AfricaWe tested the hypothesis that growth zones in the astericus otoliths of smallmouth yellowfish (Labeobarbus aeneus) and Orange River mudfish (Labeo capensis) were deposited annually. Two methods, fluorochrome marking and edge analysis of otoliths were used. For fluorochrome marking, specimens...