Now showing items 31-40 of 53
Aspects of the biology and population dynamics of freshwater mussels in Lake Kariba and Lake McIlwaine.
Following preliminary observations in 1975 the Lake Kariba Fisheries Research Institute implemented a research program in March 1976 to investigate various aspects of the biology and population dynamics of the mussel ...
Potential of established pastures in the winter rainfall region.
The seasonal production of 11 pastures was evaluated in dryland and irrigated trials at eight sites in the Winter Rainfall Region. These data were related to ...
Dormancy and germination of the Manketti nut, Ricinodendron rautanenii.
The distribution of Ricinodendron rautanenii trees is confined to a fairly distinct band across southern Africa. This stretches from South West Africa in the west, through Botswana and Zimbabwe, to Mozambique in the ...
A study of the blackshouldered kite Elanus caeruleus.
No abstract available.
A revision of the genus Ancilla Lamarck, 1799 (Mollusca : Olividae : Ancillinae)
The genus Ancilla Lamarck, 1799, contains 34 valid species and subspecies; 41 names previously applied to the group are reduced to 23, and 11 new species described (Kilburn, 1977, 1980, 1981). A provisional subgeneric ...
An evaluation of irrigated ryegrass/clover pastures for fat lamb production in the Highland Sourveld of Natal.
The primary objective of this study was to increase net farm income in the Highland Sourveld of Natal by developing pasture based fat lamb production systems. Secondary objectives included (a) determination of ...
Tissue culture studies on Peperomia clusifolia Hook. and Strongylodon macrobotrys A. Gray.
Tissue culture studies were carried out on two ornamental plant species, Strongylodon macrobotrys A. Gray and Peperomia clusifolia Hook. Successful in vitro regeneration of plantlets was achieved in the latter species, using ...
Selected aspects of the adaptive biology and ecology of the Namib Desert golden mole (Eremitalpa granti Namibensis)
Eremitalpa granti namibensis is a small blind subterranean insectivore (Chrysochloridae) endemic to the Namib Desert sand dunes. This study of the biology and ecology of the Namib mole assesses its adaptive strategies ...
Aspects of the biology of the caracal (Felis caracal Schreber, 1776) in the Cape Province, South Africa.
Felis caracal, despite heavy hunting pressure, is common and widespread throughout the Cape Province. Caracal are considered to be the principal wild predator of domestic livestock (goats and sheep) by most farmers ...
The influence of turbidity on fish distribution in Natal estuaries.
Studies In other parts of the world have proved that turbidity affects aquatic life and work In Australia and North America has shown that the distribution of some fish species may be determined by the level of turbidity ...