Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 22 for “"African elephant"”.
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African elephant conservation and population genetics
… to conservation and management entities. African elephants are in decline and the research here aims to answer important questions relevant to conservation efforts. (1) Phylogeographic patterns between nuclear and mitochondrial DNA in African elephants are often incongruent, which has been …
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The Efficacy of Downlisting the African Elephant under CITES: A Critical Assessment
… animals as the rhino, leopard, tiger, and the African elephant. The African elephant's plight has arguably been the most popular. Due to trade in its ivory, African elephant populations declined so dramatically that experts claimed the elephant would be extinct by 2010. This paper examines the …
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Characterizing African Elephant (<i>Loxodonta Africana</i>) Population Dynamics and Distribution in Botswana
The African elephant (Loxodonta africana) is an iconic species that is globally threatened. Of the total continental population, 37% is found in Botswana, the highest number and density of elephants in Africa. Elephant management in this country remains challenging and complex as the population …
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Wire Netting Reduces African Elephant (<i>LOXODONTA AFRICANA</i>) Impact to Selected Large Trees in South Africa
<p>African elephants (<em>Loxodonta africana</em>) are ecosystem engineers in that they substantially alter the environment through their unique foraging and feeding habits. At high densities, elephants potentially have negative impacts on the environment, specifically to large trees. Because of …
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Control of testosterone secretion, musth and aggressive behaviour in African elephant (Loxodonta Africana) bulls using a GnRH vaccine
… management problem for captive and free-ranging African elephant bulls, and can endanger the lives of both animals and man where such elephants are kept. Generally, bulls in musth have to be restrained to such an extent that it becomes an animal welfare issue. Often euthanasia constitutes the …
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Annals of ivory : perspectives on African elephant Loxodonta africana (Blumenbach 1797) feeding ecology from a multi-decadal record.
This thesis explores the dietary responses of African elephants (Loxodonta africana) to environmental change by testing the hypothesis that diet switching (from predominantly browse-based to more grass-rich diets) is driven by cyclical patterns of climate and habitat change in a southern African …
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Conservation genetics of African elephants
Elephant population numbers are plummeting across the African continent. Habitat loss as a consequence of anthropogenic landscape transformation, and the poaching of elephants for the illegal ivory trade, has reduced and fragmented elephant populations to a fraction of their former population size …
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An Assessment of Perceived Crop Damage in a Tanzanian Village Impacted by Human-Elephant Conflict and an Investigation of Deterrent Properties of African Elephant (Loxodonta Africana) Exudates Using Bioassays
Human-elephant conflict (HEC) is on the rise in East Africa as habitat that was formerly occupied by elephants and other wildlife is being converted to farmland. African elephants (Loxodonta africana) will raid agricultural fields to feed on crops, and many agriculturalists attribute the majority …
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Waterhole Dynamics and Chemical Signals of African Elephants (<i> Loxodonta Africana </i>)
… is influenced by abiotic and biotic factors. The African savanna experiences distinct wet and dry seasons. Species become spatially restricted around water resources during the dry season, resulting in increased intraspecies and interspecies resource-based aggregation. A dominate species, such as …
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Chemical Signaling and Resource Use by African Elephants (Loxodonta Africana)
… polygynous, sexually dimorphic species like the African elephant, Loxodonta africana, resource distribution influences female dispersion, while the location of females shapes male dispersion. Human constriction of viable habitat has affected elephant movements and impact. Elephants travel in …
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Movement patterns of African elephants (Loxodont africana, Blumenbach) in a seasonally variable ecosystem in south-eastern Chad
African elephant (Loxodonta africana) range and numbers have declined over the past century as a result of increasing human populations, agricultural development, and illegal hunting for ivory. Understanding the dynamics of wide-ranging animal migrations is important for the conservation of these …
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Visual and olfactory recognition of familiar humans and elephants by African elephants
African elephants (Loxodonta africana) distinguish between familiar and non-familiar conspecifics through olfaction and human ethnic groups through vision and olfaction. We investigated whether elephants recognize individual familiar humans and elephants through vision and olfaction in two captive …
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Prevalence of bacterial zoonoses in selected trophy hunted species, and the potential of human health risk in Bwabwata National park, Namibia
… in selected trophy hunted species Loxodonta Africana (African Elephant), Syncerus caffer (African Buffalo), Tragelaphus strepsiceros (Kudu), Hippopotamus amphibious (Hippopotamus), Hippotragus niger (Sable antelope), and Hippotragus equinus (Roan antelope), and the potential human health risk …
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The other animal : poems
… which chronicled the making of a showcase on the African elephant. The rigours involved in filming such unpredictable subjects featured strongly in the interviews with each member of the film crew : the length of time required to develop a relationship of trust with the animals, the ever-present …
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Spatio-Temporal Effects of Land Use Changes in A Savanna Wildlife Area of Kenya
… I studied land use changes and their effects on elephant habitat quality in Amboseli Basin, Kenya. I used visual interpretation to analyze land use changes from satellite images for 1975, 1988, and 1993. I determined that during the evaluation period, conversion of areas to agricultural land has …
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Maximising Return on Investment for Species Conservation
… approach can be applied at species level, using African elephants as a case study. In order to model the effects of investment, an important first step is being able to estimate current levels of spend accurately. I used annual spend data, collected for 192 protected areas across sub-Saharan …
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Chemosensory Behavior and Development of African Male Elephants (Loxodonta Africana)
African elephants are a polygynous species that raise offspring in a matriarchal society. Males disperse, spend time in male groups, and search for mates when mature. Urinary chemical signals play an important role in detecting reproductively active females. African male elephants develop movement, …
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The Conundrum of Causal Reasoning in Elephants
… causal reasoning in a tool-use task with elephants and concluded that elephants were not capable of causal reasoning. The current study, a modified replication, yielded results that were not congruent with Nissani’s (2006) manuscript. Additionally, it was very unlikely that the Nissani …
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Age Effects on Social and Investigative Behaviors in a Closed Population of African Elephants
In this study of African elephants (Loxodonta africana), I examined two competing hypotheses to explain the development of social and reproductive behaviors. The reproductive hypothesis states that behaviors change around the time when an individual begins successfully reproducing, while the social …
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