Global ETD Search
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Showing 1 to 18 of 18 for “"sea lion"”.
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Galápagos Sea Lion (Zalophus wollekaeki) Play Behaviors on San Cristóbal Island, Ecuador
… of play activities from videotapes of Galápagos sea lions on San Cristóbal Island from mid-summer of 2008. I begin with a discussion of ideas about play and types of play, elaborate the conceptual system of projects and routines in play, and provide a brief description of sea lion taxonomy and …
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BRANCHED CHAIN FATTY ACIDS (BCFA) IN NATURE: FISH, FERMENTED FOODS, AND SEA LION VERNIX CASEOSA
… anecdotal reports of BCFA-rich vernix caseosa in sea lions. Twenty-seven wild fishes collected from fresh waters in the northeastern United States were analyzed. BCFA was only 1% ± 0.5% (mean ± SD) of total fatty acids, contributing only a small amount of BCFA per serving to the diet. …
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Effects of weaning age on body composition and growth of ex situ California sea lion (Zalophus californianus) pups
… development. Three groups of ex situ California sea lion (Zalophus californianus) pups were examined during the initial period of independence after they were weaned at approximately five, seven, and nine months of age. Absolute growth rates of pups were calculated and changes in body composition …
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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
… specific behaviors have been identified in grey seals (Robinson et al., 2015; Twiss & Franklin, 2010; Twiss, Culloch & Pomeroy, 2011; Twiss, Cairns, Culloch, Richards & Pomeroy, 2012). Furthermore, the context component of definitions of personality is not often assessed, despite evidence that …
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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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Scientific Acoustic Data from Commercial Fishing Vessels: Eastern Bering Sea Walleye Pollock (Theragra chalcogramma)
… International Council on the Exploration of the Sea Working Group on Fisheries Acoustics, Science and Technology provided guidance on using commercial fishing vessels for collecting opportunistic acoustic data (OAD), an approach for working with these non-traditional datasets has not been …
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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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Eulachon past and present
… suggest increases in shrimp and hake catches, seal and sea lion abundance, and sea surface temperatures were weakly associated with the declines. But contrary to expectations, adult hake biomass showed a positive association with four eulachon relative abundance time-series, suggesting that …
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Alutiiq Engineering: The Mechanics and Design of Skeletal Technologies in Alaska's Kodiak Archipelago
… long bones, and the limb bones of the California sea lion. Cervid compact limb tissue is stiff, strong, and brittle, while reindeer antler is flexible and highly fracture-resistant (tough). Air-drying hardens all skeletal tissues, and greatly increases investment times for creating tool blanks of …
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Iceberg-keel ploughmarks on the seafloor of Antarctic continental shelves and the North Falkland Basin: implications for palaeo-glaciology
… Pine Island Trough and outermost Weddell Sea shelf regions of Antarctica, detailed analysis of >13,000 iceberg-keel ploughmarks was undertaken. By considering the draft of icebergs calved from Antarctica today, calculated from detailed satellite altimetric datasets by this work, almost all …
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Diet quality and season affect physiology and energetic priorities of captive Steller sea lions during and after periods of nutritional stress
… ability of animals to contend with unpredictable seasonal shifts in quality and quantity of prey has implications for the conservation of wildlife. Steller sea lions(Eumetopias jubatus) were subjected to different quantities and qualities of food to determine what physiological and endocrine …
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Mobility and hydrodynamic implications of the long neck in plesiosaurs
… evidence, this would provide support for a more sea lion-like morphology. Bending the neck evenly in lateral flexion showed greatest turning radius and drag in long-necked plesiosaurs and least in short-necked forms, demonstrating short-necked plesiosaurs were more likely to make faster neck …
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Effects Of Food Deprivation On Blood Lipid Concentration And Composition In Steller Sea Lions (eumetopias Jubatus)
Steller sea lions, the largest Otariid, fast during their breeding season; during this time they refrain from ingesting food for a period of 12-43 days. Fasting, while undertaking an extremely energetically demanding activity (breeding and pupping), requires specific physiological adaptations. This …
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Sea sparing, sea sharing, and production at least cost to the planet
… also vital for food security, with over 3.2 billion people relying on fish for a significant part of their diet. With growing international support for protecting 30% of the planet by 2030, no-take marine protected areas (MPAs) that exclude fishing from certain areas entirely have emerged as a …
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First detection of otarine herpesvirus-1 in South America: Characterizing the epidemiology in a Peruvian pinniped population
… urogenital carcinoma in free-ranging California sea lions (Zalophus californianus), but rarely considered a conservation concern in the southern hemisphere. The objective of this study was to survey free-ranging South American sea lions (Otaria byronia) and Peruvian fur seals (Arctocephalus …