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 20 for “"pinniped"”.
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First detection of otarine herpesvirus-1 in South America: Characterizing the epidemiology in a Peruvian pinniped population
… over three years (2011, 2014, 2015) from live pinnipeds tested positive with a pan-herpesvirus conventional PCR. Sequencing revealed 99% homology to OtHV-1 at the DNA polymerase gene. Urogenital, conjunctival, and oropharyngeal swabs collected from 136 live pinnipeds at Punta San Juan between …
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Morphometric analysis of ears in two families of pinnipeds
Pinniped (seal and sea lion) auditory systems operate in two acoustically distinct environments, air and water. Piniped species differ in how much time they typically spend in water. They therefore offer an exceptional opportunity to investigate aquatic versus terrestrial hearing mechanisms. The …
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Management of seal tourism in New Zealand – tourism and the New Zealand fur seal in the Bay of Plenty
Pinniped (seal, sea lion and walrus) tourism is an expanding industry, popularized due to the playful and interactive nature of seals. The industry can have positive outcomes for pinnipeds, through education and the promotion of conservation issues, or negative outcomes, such as causing the animals …
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Disentangling entanglement in Cape fur seals for better management of plastic pollution impacts
… incidents. Entanglement is a frequent threat to pinniped species leading to suffering and potential death of affected individuals. I use a long-term dataset to investigate temporal trends in entanglement rates as well as to describe the most common material, type and probable source of …
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Spatio-Temporal Variation in Ringed Seal (Pusa Hispida) Density and Habitat Use in the Last Ice Area
… (Pusa hispida) are an abundant ice-associated pinniped species with a habitat range spanning the circumpolar region, making them an ideal study species for exploring ecological changes under changing environmental conditions. Using observations from aerial surveys, this thesis provides the …
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Do Pinnipeds Have Personality? Coding Harbor Seal (<i>Phoca vitulina</i>) and California Sea Lion (<i>Zalophus californianus</i>) Behavior Across Contexts
… patterns of contextual consistency in two pinniped species.</p>
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Understanding adaptive regulation of skeletal muscle physiology in the Weddell seal: a proteomics approach
… of paramount importance due to the fact that the pinniped genome is largely unidentified, and established a 2DE protocol tailored to suit the unique properties of diving mammal skeletal muscle tissue. To our knowledge, this was the first study in which proteomics was applied to study the proteome …
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Entanglement of Cape Fur Seals (Arctocephalus pusillus pusillus) in South Africa
… the ocean. Endemic to the African continent, the pinniped species, Cape fur seal (Arctocephalus pusillus pusillus), are vulnerable to entanglement due to their curious nature and thick fur. Entanglement data were available from systematic photographic surveys of six colonies in South Africa …
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IDENTIFICATION AND CHARACTERISATION OF POTENTIALLY NOVEL HERPESVIRUSES IN VERTEBRATE SPECIES
… and alphaherpesviruses found in reptiles and pinnipeds, where there is considerable viral diversity but insufficient genomic resources. Consequently, the classification of these viruses often lacks clarity and precision, making species and strain-level identification especially challenging. A …
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Feeling out Your Food: A Histological Analysis of the Whisker System in Seals
… is especially important in deep-diving mammals. Pinnipeds (seals, sea lions, and walruses) have highly sensitive whiskers that are used to follow hydrodynamic trails created by their swimming prey. Each pinniped vibrissa is surrounded by a tripartite blood sinus system composed of an upper …
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The effects of white shark presence on the behaviour of Cape fur seals at Geyser Rock, Gansbaai, South Africa
… unidentified in previously studied white shark/pinniped systems. Together these results provide empirical support for both the risk-allocation hypothesis and refugia hypotheses within marine predator-prey systems.
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Genetic Dissection of Anthropogenic Impacts on a Declining Antarctic Fur Seal Population
… and environmental factors. <br /><br /> Pinnipeds are well suited to exploring these questions. Many pinniped species were commercially exploited by 18th to early 20th century sealers, bringing some species to the brink of extinction, whereas others had barely any contact with humans. …
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Harbor Seal (Phoca vitulina) Reproductive Advertisement Behavior And The Effects Of Vessel Noise
… seals (Phoca vitulina) are a widely distributed pinniped species that mate underwater. Similar to other aquatically mating pinnipeds, male harbor seals produce vocalizations during the breeding season that function in male-male interactions and possibly as an attractant for females. I …
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The effect and conservation implications of the re-establishment of a Cape fur seal Arctocephalus pusillus pusillus breeding colony at Vondeling Island, Saldanha Bay
… for forage resources between sympatric pinniped and seabird species. The results of at-sea competition provide a coarse resolution of a critical question in species interaction within the BCLME. Further research efforts should be built around this foundation to better understand the …
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The biogeography of Striated Caracaras Phalcoboenus australis
… as glacial refuges for colonial seabirds and pinnipeds, as well as for the ancestors of Striated Caracaras. On these islands, Striated Caracaras developed a dependence on the food resources that seabird and pinniped colonies provide, and a preference for their habitat - seacoasts fringed with …
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Assessing the sustainability of seal tourism at Duiker Island, Hout Bay
Pinniped focused tourism has grown rapidly both globally and in South Africa. In a 2002 survey South Africa was identified as having earned the most revenue from seal ecotourism of all the countries that engage in this activity. Seal tourism includes approaching colonies on foot, by kayak, on large …
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Causes and consequences of genetic diversity in pinnipeds
… ecology and microbiology in wild populations. Pinnipeds are an extraordinary group of marine mammals for exploring such wide-ranging questions. From the tropical waters of the Central Pacific to the wild seas of the Southern Ocean, pinnipeds inhabit nearly every marine environment in the world. …
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Pinnipeds as sentinels of antimicrobial resistance: mapping antimicrobial resistance genes in the waters of the United Kingdom
… AMR, many of which feed into the marine habitat. Pinnipeds are often used as sentinels of ocean health because they are long lived, apex predators that forage over wide areas and thus can represent the food web over large regions. They can also be relatively easily sampled when they are on land. …
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Effects of weaning age on body composition and growth of ex situ California sea lion (Zalophus californianus) pups
Pinnipeds exhibit a wide range of lactation strategies that vary from just a few days to nearly three years in duration. Phocids have a relatively short, intense nursing period culminating with weaning after just a few days or weeks, while dependent otariids generally take several months of …