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Browsing by Supervisor "De Bruyn, P.J. Nico"
Now showing items 1-13 of 13
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(University of Pretoria, 2013)Genetic parameters such as genetic variability, gene flow, relatedness and migration were determined between two South African coastal delphinid species, Cephalorhynchus heavisidii (Heaviside’s dolphin) and Tursiops aduncus ...
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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, 2023)Southern elephant seals (SES), Mirounga leonina, are large capital breeding marine predators that have a circumpolar distribution in the Southern Ocean. Female SES typically give birth to a single pup each year, however, ...
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(University of Pretoria, 2020-02)Environmental perturbations impose selection pressures on organisms. The adaptive physiological mechanisms employed by species to survive in their changing environments are fundamental for their persistence. It is postulated ...
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(University of Pretoria, 2021-05)Inter- and intra-annual variation of environmental conditions arises from climatic variability, resulting in the temporal variation of resources. Variations in the distribution and abundance of food resources affect animal ...
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(University of Pretoria, 2015)The study focuses on the introduction/reintroduction of iconic animals in selected SANParks namely Addo Elephant, Karoo, and Mountain Zebra National Park. The purpose of the study was firstly to determine the relative ...
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(University of Pretoria, 2021-02-15)Marine mammals breeding in sympatry use resources differently depending on their time-activity budgets and prey distribution. We measured isotopic values and patterns of δ15N and δ13C in keratinous whiskers of satellite-tagged ...
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(University of Pretoria, 2014-03)Craniometrics is a very reliable and effective tool for studying the difference in animal morphology. Previously, traditional craniometrics were conducted with the aid of calipers in two dimensional format (2D). Such ...
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(University of Pretoria, 2013)Foraging forms the cornerstone of an animal’s life-history. An individual's foraging success shapes the demography and health of a population. Understanding key facets of maternal foraging behaviour are crucial to get a ...
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(University of Pretoria, 2011)Heaviside‟s dolphins, Cephalorhynchus heavisidii, are among the least known cetaceans. They are endemic to the coastal waters along the west coast of southern Africa. The occurrence, behaviour and group dynamics were ...
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(University of Pretoria, 2012)The broad objective of the study is to examine mass change as related to other life history parameters of southern elephant seals Mirounga leonina at Marion Island. It has been argued that mass plays a fundamental role in ...
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(University of Pretoria, 2023)Lanternfish (Myctophidae) are abundant mesopelagic fishes in the Southern Ocean ecosystem and represent a large dietary component for sentinel marine predators, such as seals and seabirds. Their contribution to diets of ...
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(University of Pretoria, 2010-10-18)Please read the abstract in the section 00front of this document.
Now showing items 1-13 of 13