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UNEXPECTED GROWTH OF PISTIA STRATIOTES IN SANYATI GORGE, LAKE KARIBA
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: R.F. du Toit --- University Lake Kariba Research Station, ZimbabweDuring early 1984, the floating plant Pistia stratiotes grew unexpectedly and very rapidly in the Sanyati Gorge of Lake Kariba. Measurements of phosphorus and nitrogen in the surface waters revealed a pattern of nutrient concentrations along the gorge that could... -
CLEANING BEHAVIOUR BETWEEN THE CICHLID FISH TILAPIA RENDALLI FENDALLI BOULENGER 1896 AND THE CYPRINID, LABEO CYLINDRICUS PETERS, 1852
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: J.L. Minshull --- , ZimbabweA case of interspecific cleaning behaviour is described between a cichlid host Tilapia rendalli rendalli and a Juvenile cyprinid Labeo cylindricus, in captivity. The host fish initiated the cleaning behaviour with a ‘head down’ display. -
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... -
CATCH AND EFFORT IN THE LAKE KARIBA SARDINE FISHERY
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: B.E. Marshall --- Department of Biological Sciences, ZimbabweThe fishery for Limnothrissa on Lake Kariba, which produced nearly 25 000 t in 1985, is backed by a comprehensive statistical system which increases the chance of using catch and effort models to manage it. The way in which effort... -
OBSERVATIONS ON THE DISTRIBUTION, EMERGENCE AND BEHAVIOUR OF CENTRAL AFRICAN CHAOBORIDAE
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: SA Mitchell --- Unit for Limnology, South AfricaThe distribution of four species of Chaoboras over selected parts of Zimbabwe is given. The effect of temperature on the duration of the larval life cycle is discussed in relation to the generation time and the lunar periodicity of the... -
The zooplankton community of Lake Kariba in 1962/63 following impoundment of the Zambezi River
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: D Harding NA RaynerLake Kariba, bordered by Zambia in the north and Zimbabwe in the south, was formed following the impoundment of the the Zambezi River in 1955. Pre- and post-impoundment studies, which were undertaken on Lake Kariba by the Joint Fisheries Research... -
Prosobranch mollusc species- and size-preferences of Sargochromis codringtonii (Cichlidae) in Lake Kariba, Zimbabwe
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: J Brodersen MJ Chimbari H MadsenFrom the stomach contents of 28 wild-caught Sargochromis codringtonii from Lake Kariba the size and species of snails consumed were estimated from opercula found. An energetic cost/benefit ratio of the various sizes of the most frequent prey, Bellamya capillata, was... -
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... -
Temporal effects of biocontrol processes on nutrient dynamics in a shallow lake: Case study of Lake Xini, Okavango Delta in Botswana
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: CN Kurugundla --- , Botswana JC Buru --- , AustraliaLittle is known about the effects of weeds on nutrient concentration changes in aquatic environments. We examined alterations to nutrient dynamics from the biocontrol process of Salvinia molesta by the weevil Cyrtobagous salviniae in the Lake Xini of Okavango, Botswana... -
The bio-invasion and population dynamics of Cherax quadricarinatus in Zambian waters
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Eva Nambeye --- University of Zambia, Zambia Chibwe Katapa --- University of Zambia, Zambia Bernadette Chimai Mulenga --- University of Zambia, Zambia Hangoma Gordon Mudenda --- University of Zambia, Zambia Marjatta Eilitta --- , United States Michael A Rice --- University of Rhode Island, United StatesSince the 1990s, the exotic Australian redclaw crayfish, Cherax quadricarinatus, has been spreading in the Zambezi River basin in Zambia. The population structure of crayfish was determined at locations along the north shore of Lake Kariba 'near Siavonga' and the...