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Browsing Zoology and Entomology by Type "Dissertation"
Now showing items 1-20 of 251
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(University of Pretoria, 2011-02-09)Killer whales are the oceans’ apex predator and are known to have important effects on ecosystems. At Subantarctic Marion Island, southern Indian Ocean, they have only been studied opportunistically, resulting in limited ...
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(University of Pretoria, 2010-04-26)Please read the abstract in the section 00front of this document
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(University of Pretoria, 2013-11)Although protected areas have been used as principal conservation tools, most of them are suffering from human-induced threats. Consequently, a good understanding of such human-driven threats on biodiversity and identifying ...
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(University of Pretoria, 2008)The elephant debate deals largely with population size, how elephant numbers change over time, how they may affect vegetation, and how their populations should be managed. Trends in elephant numbers frequently motivate ...
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(University of Pretoria, 2007-08-16)The discovery of the honeybee-specific ectoparasitic mite Varroa destructor in South Africa in October 1997 raised the spectre of massive honeybee colony losses as has occurred in most parts of the world where the varroa ...
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(University of Pretoria, 2014-07)Patterns of invertebrate species richness and body size across elevational gradients have been well-documented in a variety of studies. However, very little is known about the factors that govern these patterns along ...
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(University of Pretoria, 2017)Human population growth generally causes carnivore declines. The rapid expansion of urban landscapes creates both biotic and abiotic changes that are known to negatively impact carnivore populations (Šálek, Drahníková & ...
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(University of Pretoria, 2008-08-19)The systematic status and geographic distribution of spiny mice of the genus Acomys I. Geoffroy, 1838 in northern Tanzania is uncertain. This study assesses the systematic and geographic distribution of Acomys from northern ...
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(University of Pretoria, 2009-12-08)Invasive alien species are considered the second greatest threat to global biodiversity after habitat loss. South Africa is not immune from such threats and it is estimated that 10 million ha (8.28%) of land has been invaded ...
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(University of Pretoria, 2007-07-03)African mole-rats (Bathyergidae) exhibit a wide range of social structures ranging from solitary to eusocial. This allows for studies looking at links between sociality and measurable characteristics such as spatial learning ...
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(University of Pretoria, 1973)The study set out to determine some of the bioecological relationships of the sable antelope Hippotragus niger niger (Harris, 1838) in the Rhodes Matopos National Park, Rhodesia. The vegetation of the area is divided into ...
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(University of Pretoria, 2007-11-08)Please read the abstracts included at the beginning of chapters 2 to 5, of this document
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(University of Pretoria, 2024-07-08)Marine mammals are subject to a variety of anthropogenic and natural stressors. However, it is still poorly understood how these stressors may affect physiological adaptations including affecting reproductive biology. ...
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(University of Pretoria, 2021-04)Southern right whales (Eubalaena australis) in South Africa have been extensively studied since 1979 through annual photo-identification surveys. The resulting database revealed an increased rate of reproductive failure ...
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(University of Pretoria, 2021-11)Alien freshwater crayfish have been translocated into regions outside their native range causing negative impacts on biodiversity and human well-being. These negative impacts have necessitated the need to control and manage ...
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(University of Pretoria, 2014-01)Captive-breeding has been identified as an integral part of the conservation of threatened species. The black rhinoceros (Diceros bicornis) as a species is currently listed by the IUCN as critically endangered (CR), while ...
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(University of Pretoria, 2021)This study investigated variation in activity, relative abundance, and body condition of Blasius’s horseshoe bat (Rhinolophus blasii) in relation to temperature, season, rainfall, and wind speed across seven years at the ...
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(University of Pretoria, 2023)African savanna elephants, Loxodonta africana, occur across most of Africa. Elephants are water-dependent species, and will travel to great lengths to visit desired water sources. Whether these water sources are supplemented ...
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(University of Pretoria, 2013)Mating systems are classifications of the outcome of individual strategies aimed at maximising reproductive success. These systems have two components; one describes how individuals socially relate and bond to mating ...
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(University of Pretoria, 2013)Ground pangolins Smutsia temminckii are inconspicuous, mainly nocturnal mammals that occur at low population densities. As a result, there is scant information available on the ecology and physiology of this species. To ...
Now showing items 1-20 of 251