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 116 for “"QL Zoology"”.
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Bat Skull Evolution: the Impact of Echolocation
Morphological adaptations of the mammalian skull are influenced by a variety of functional, environmental and behavioural factors. Skulls of echolocating species, such as bats, also face the challenge of optimizing sound emission and propagation. A strong association between bat skull morphology …
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Mechanisms facilitating coexistence between leopards (Panthera pardus) and their competitors in the Okavango Delta, Botswana
Large carnivores provide key ecological services to ecosystems, and full species assemblages are thought to be important in maintaining full ecosystem function. The African large carnivore guild represents one of the last functionally intact guilds of large carnivores on Earth, but relatively …
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The Influence of Forest Structure on Sumatran Orangutan Nesting and Densities in the Lowland Dipterocarp Forests of North Sumatra
Prior studies on Bornean orangutans have suggested that orangutans were primarily selecting nest sites that provided more stable and sheltered platforms thereby offering greater comfort rather than selecting for nests which reduced the risk of predation by limiting access to ground predators …
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Ranging patterns and resource use in samango monkeys
Loss and fragmentation of habitat can have significant negative consequences for forest-dwelling species. Understanding how a species uses space in an increasingly fragmented and human-dominated landscape is important to determine the extent to which they can persist in such landscapes. How animals …
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The Role of the Preoptic Area in Social Interaction in Zebrafish
The proposed “Social Decision Making Network” (SDMN) is a network of conserved, interconnected brain areas believed to regulate social behaviour across vertebrate taxa. While the role of the SDMN in complex social behaviours is relatively well understood, we know comparatively little about the role …
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Anthropogenic influences on the behavioural ecology of urban vervet monkeys
An animal’s behaviour is dependent upon its ability to adapt to environmental changes and available resources; consequently, generalist omnivorous species thrive in the continually developing urban landscape and preferentially choose the urban setting over its rural counterpart. Our understanding …
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Phobic finches: Investigating neophobia reactions in a colour polymorphic specialist, the Gouldian finch, Erythrura gouldiae.
Unpredictable changes to familiar environmental conditions, owing to Human Induced Rapid Environmental Change (HIREC), are increasingly presenting novel stimuli and creating strong selection pressures on specialist species to adapt to these changes. Neophobia is an ecologically relevant and …
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To mix or not to mix? Evaluating breeding productivity in mixed species bird enclosures within European zoos.
Housing animals within mixed species aggregations is often believed to offer a more naturalistic captive environment by providing behavioural and social enrichment, and has become an integral design feature for many zoos across the world. There is however, a common perception among zoo …
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Prioritization of conservation areas using species distribution modeling based on current data of butterflies in Johor
Rapid disappearance of habitats and species justifies the need to study species range and distributions so that high-priority conservation areas can be identified. Species distribution modeling (SDM) is an approach that can overcome the time and budget constraints of protected area management. This …
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Host-seeking behaviour in the malaria vector Anopheles Gambiae
In sub-Saharan Africa, 90% of malaria cases are the result of transmission by the Anopheles gambiae species complex, causing 600,000 deaths annually. Increasingly, An. gambiae demonstrate behavioural and physiological resistance to control interventions and this, coupled with inadequate sampling …
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Non-chemical control of the Red-billed Quelea (Quelea Quelea) and use of the birds as a food resource
The Red-billed Quelea Quelea quelea is the most numerous terrestrial bird and the most destructive avian pest of small-grain crops throughout sub-Saharan Africa. The birds occur in 60% of the cereal production areas of Tanzania almost every year. Quelea can cause serious local damage to millet, …
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Phylogenies of the sunbirds, spiderhunters and flowerpeckers (Nectariniidae) based on analyses of vocalisations
The phylogeny and affinities of the flowerpeckers (sometimes separated from the Nectariniidae into the family Dicaeidae), sunbirds and spiderhunters (Family Nectariniidae) are controversial and have been much debated by ornithologists from the perspectives of both the biological species and …
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Genetic and ecological investigations of European populations of the pool frog, Rana lessonae (Camerano, 1882) with allied, osteological and species identification methods
Current identification methods for distinguishing north-west European brown and water frogs are discussed and tested, to allow the presentation here, of more accurate guidance on their separation. Novel methods for the identification of species and individuals including novel, non-invasive, …
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The lumbricidae in the Hebrides
Summary: p. i.
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Biochemistry of sulphur-containing amino acids in trichomonads
No abstract available.
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The stability of model ecosystems
Ecologists would like to understand how complexity persists in nature. In this thesis I have taken two fundamentally different routes to study ecosystem stability of model ecosystems: classical community ecology and classical population ecology. In community ecology models, we can study the …
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Reproductive dynamics of the male Norway lobster, Nephrops norvegicus (L.)
The aim of this research was to examine various aspects of the reproductive biology of male Nephrops norvegicus. Due to differnces in the reproductive behaviour between the sexes males suffer greater fishing mortality. A reduction in the numbers and size of males within a fished population may have …
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