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Ovarian activity and early embryonic development in the rusty bat, Pipistrellus rusticus
Item type: Journal Article • Journal: African Zoology • Authors: M. van der Merwe --- Mammal Research Institute, Department of Zoology and Entomology, South Africa T. Mostert --- Mammal Research Institute, Department of Zoology and Entomology, South AfricaThe reproductive pattern of the female rusty bat, Pipistrellus rusticus, was investigated by means of a histological examination of the ovarian follicles as well as early embryonic development. Bats were collected from two localities in Limpopo Province. Female rusty bats... -
A new species of Graemontia Lawrence, 1931, from the Western Cape, South Africa, with notes on the relationships of the genus (Opiliones: Laniatores: Triaenonychidae)
Item type: Journal Article • Journal: African Zoology • Authors: Adriano B. Kury --- Departamento de Invertebrados, BrazilGraemontia viridiceps n.sp., is described from the southwestern part of South Africa. This is the seventh species of the genus and the second species for which male genitalia are described and illustrated. A key is given to all species of... -
Aspects of reproduction in the seasonally breeding African yellow bat, Scotophilus dinganii (A. Smith, 1833)
Item type: Journal Article • Journal: African Zoology • Authors: M. van der Merwe --- Mammal Research Institute, Department of Zoology and Entomology, South Africa N. J. van der Merwe --- Faculty of Veterinary Science, University of Pretoria, South Africa B. L. Penzhorn --- Faculty of Veterinary Science, University of Pretoria, South AfricaMonthly collections of the African yellow bat, Scotophilus dinganii, were made in the Kruger National Park. Examination of serially sectioned reproductive tracts of females showed that the African yellow bat is a monoestrous species and that insemination, ovulation and fertilization... -
Amniogenesis in the African yellow bat, Scotophilus dinganii
Item type: Journal Article • Journal: African Zoology • Authors: M. van der Merwe --- Department of Zoology and Entomology, South AfricaThe African yellow house bat, Scotophilus dinganii, was found to be seasonally monestrus, carrying a single foetus in each of the two uterine horns of the bicornuate uterus. Implantation was superficial, with amniogenesis initiated early during embryogenesis. The amnion in... -
Decline of large mammals in the Katavi-Rukwa ecosystem of western Tanzania
Item type: Journal Article • Journal: African Zoology • Authors: Tim Caro --- Department of Wildlife, Fish and Conservation Biology, U.S.A.In the Katavi-Rukwa ecosystem of western Tanzania, aerial censuses carried out between 1988 and 2002 show that populations of several large ungulate species had declined. Five competing factors that could be responsible for these changes were investigated. (i) Rainfall increased... -
Lion predation on elephants in the Savuti, Chobe National Park, Botswana
Item type: Journal Article • Journal: African Zoology • Authors: R. John Power --- Carnivore Conservation Group, Endangered Wildlife Trust, De Beers Venetia Limpopo Nature Reserve, South Africa R. X. Shem Compion --- Carnivore Conservation Group, Endangered Wildlife Trust, De Beers Venetia Limpopo Nature Reserve, South AfricaLions rarely prey on elephants. Botswana‘s Savuti lions, however, switch to preying on elephants during the late dry season (August–November), and the frequency of this has increased in the last two decades (1985–2005). An opportunity to document this phenomenon was... -
The effects of pastoralism and protection on lion behaviour, demography and space use in the Mara Region of Kenya
Item type: Journal Article • Journal: African Zoology • Authors: Niels L. Mogensen --- Department of Biology, Denmark Joseph. O. Ogutu --- International Livestock Research Institute, Kenya Torben Dabelsteen --- Department of Biology, DenmarkContraction of their historic geographic ranges and conflicts with humans underpins declines in large carnivore populations worldwide. These declines, which characterize pastoral systems where carnivores, people and livestock live in close contact, may be paralleled by changes in carnivore behaviour... -
The role of gold bullion in South African balanced portfolios
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: D. Bradfield --- Department of Statistical Sciences, South Africa B. Munro --- Head of Multi Assets, Cadiz Asset Management, South AfricaThe objective of this paper is to establish the structural features that gold bullion brings to South African global–balanced portfolios and to establish a strategic weight for this potential asset. We consider two methodological approaches based on a 40-year history... -
Application of metaheuristic algorithms in DC-optimal power flow
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Oluwafemi Ajayi --- , South Africa Nnamdi Nwulu --- , South Africa Uyikumhe Damisa --- , South AfricaThis paper presents the application of two metaheuristic algorithms (Exchange Market Algorithm and Ant Lion Optimizer) in solving the DC optimal power flow problem. The objective of this study is to minimize fuel costs associated with electricity generation. Advanced Interactive... -
Adding economic and ecological value to communal pastoralism: lessons from implementing a Herding for Health model in the Okavango Delta, Botswana
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Edwin I Mudongo --- Communities Living Among Wildlife Sustainably (CLAWS) Botswana, Botswana Mathata Tomeletso --- Communities Living Among Wildlife Sustainably (CLAWS) Botswana, Botswana Kelebogile Motshoi --- Communities Living Among Wildlife Sustainably (CLAWS) Botswana, Botswana Paul Dube --- Communities Living Among Wildlife Sustainably (CLAWS) Botswana, Botswana Charles Chibidika --- , Botswana Andrew B Stein --- Communities Living Among Wildlife Sustainably (CLAWS) Botswana, BotswanaThe Herding for Health (H4H) model integrates ecosystem restoration with improved livestock management to address rangeland degradation, livestock losses, and market constraints in pastoral communities. This four-year case study evaluates the implementation of H4H in Eretsha, Botswana, where annual cattle...