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Energetics And Development Of Northern Fur Seal Callorhinus Ursinus Pups
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Book Synopsis Energetics and Development of Northern Fur Seal, Callorhinus Ursinus Pups by : Mary Jill Donohue
Download or read book Energetics and Development of Northern Fur Seal, Callorhinus Ursinus Pups written by Mary Jill Donohue and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Energetics and Development of Northern Fur Seal, Callorhinus Ursinus Pups by : Mary Jill Donohue
Download or read book Energetics and Development of Northern Fur Seal, Callorhinus Ursinus Pups written by Mary Jill Donohue and published by . This book was released on 1998 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Growth Hormone Concentrations in Northern Fur Seal (Callorhinus Ursinus) Pups and Adults by : Vivian Rosa Casanas
Download or read book Growth Hormone Concentrations in Northern Fur Seal (Callorhinus Ursinus) Pups and Adults written by Vivian Rosa Casanas and published by . This book was released on 1996 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Does tagging and handling affect the growth of northern fur seal pups (Callorhinus ursinus)? by : A.W. TRITES
Download or read book Does tagging and handling affect the growth of northern fur seal pups (Callorhinus ursinus)? written by A.W. TRITES and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ontogeny of swimming and diving in northern fur seal (Callorhinus ursinus) pups by : J.D. BAKER
Download or read book Ontogeny of swimming and diving in northern fur seal (Callorhinus ursinus) pups written by J.D. BAKER and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Opportunistic Feeding of the Northern Fur Seal, Callorhinus Ursinus, in the Eastern North Pacific Ocean and Eastern Bering Sea by : Hiroshi Kajimura
Download or read book Opportunistic Feeding of the Northern Fur Seal, Callorhinus Ursinus, in the Eastern North Pacific Ocean and Eastern Bering Sea written by Hiroshi Kajimura and published by . This book was released on 1984 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Northern Fur Seal (Callorhinus Ursinus) by : Teresa Clocksin
Download or read book The Northern Fur Seal (Callorhinus Ursinus) written by Teresa Clocksin and published by . This book was released on 1985 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: 1327 citations of publications dealing with the northern fur seal (Callorhinus ursinus). Includes subject index. Draft copy.
Book Synopsis Early Migratory Behavior of Northern Fur Seal (Callorhinus Ursinus) Pups from Bering Island, Russia by : Olivia Astillero Lee
Download or read book Early Migratory Behavior of Northern Fur Seal (Callorhinus Ursinus) Pups from Bering Island, Russia written by Olivia Astillero Lee and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: I examined the population trends of northern fur seals (Callorhinus ursinus) using an age-specific metapopulation model that allowed migration between rookeries. Mortality and birth rates were modified to simulate future population trends. I also examined the early migratory behavior and habitat associations of pups from Bering Island (BI), Russia. I instrumented 35 pups with Mk10-AL satellite tags and stomach temperature telemeters which provided diving, foraging and location data. I hypothesized that some aspects of pup behavior from the stable BI population differed from the behavior of pups from the unstable Pribilof Islands (PI). The population model revealed that emigration did not contribute significantly to the current PI population decline. However, large source populations contributed significantly to population growth in newly colonized rookeries. A stabilization of the PI population was predicted with a 10 to 20% reduction in both juvenile and adult female mortality rates. The diving behavior of pups showed a general progression towards longer and deeper dives as pups aged, particularly between 1600 - 0400 (local time), that was similar to PI pup behavior. However, unlike pups from the PI, I found three main diving strategies among BI pups: 1) shallow daytime divers (mean depth = 3.56 m), 2) deep daytime divers (mean depth = 6.36 m) and 3) mixed divers (mean depth = 4.81 m). The foraging behavior of pups showed that most successful ingestion events occurred between 1600 - 0400, with successful ingestion events lasting 25.36 ± 27.37 min. There was no significant difference among the three strategies in the depth of successful foraging dives. I also examined the foraging search strategies in adult females and pups. Both pups and adults conducted Levy walks, although pups foraged in smaller patches (1 km scales). Using a logistic model to determine habitat associations, I found that pup locations were positively correlated with increasing chlorophyll a concentrations, distances from shore, and sea surface temperatures, and were negatively correlated with depth. There was no significant relationship between all pup locations and the regions (peripheries or centers) or types (cyclonic or anti-cyclonic) of eddies, but ingestion event locations were related to mesoscale eddy peripheries.
Book Synopsis Pup weight and survival of northern fur seals Callorhinus ursinus by : J.D. BAKER
Download or read book Pup weight and survival of northern fur seals Callorhinus ursinus written by J.D. BAKER and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evidence of Intermittent Residency in the Northern Fur Seal (Callorhinus Ursinus) by : Megan Foley
Download or read book Evidence of Intermittent Residency in the Northern Fur Seal (Callorhinus Ursinus) written by Megan Foley and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This study found evidence of intermittent, multi-year residency periods in northern fur seals (Callorhinus ursinus) using stable isotope ratios in vibrissae and canine teeth. Northern fur seals migrate from the Bering Sea during summer months to lower latitudes and slightly warmer waters of the northeastern Pacific Ocean and California Current in the winter. To determine the length of time spent away from the Bering Sea, growth rate was estimated using the covarying oscillations ?13C and ?15N, estimated to be 0.09 mm/day. The ?13C and ?15N in vibrissae from 30 male fur seals showed a minimum of 13 separate periods of stable covariance covering 3.25+ cm, indicating at least 1 year in warmer, less productive waters of the northeastern Pacific Ocean. The vibrissae isotope ratios were used in conjunction with ?18O from tooth dentin growth layer groups of 20 male northern fur seals; they showed significant enrichment in ?18O in 50% of the animals at age 1-2 years, which indicates extended periods of time spent in lower latitudes in the North Pacific Ocean as ?18O is typically enriched in warmer, less productive waters. Significant changes in ?18O were found to be ̃0.2‰ enrichment per 10º south latitude, while longitude was found to have 0.2‰ enrichment per 50˚ East longitude. These data show that latitudinal changes, those related to the southerly migration from the Bering Sea to the northeastern Pacific Ocean, are a stronger factor in the shifts in dentinal ?18O than longitudinal shifts. These intermittent periods of occupation are important when estimating population abundance of northern fur seals, especially pups and juveniles.
Book Synopsis Behavior and Ecology of the Northern Fur Seal by : Roger L. Gentry
Download or read book Behavior and Ecology of the Northern Fur Seal written by Roger L. Gentry and published by Princeton University Press. This book was released on 2014-07-14 with total page 409 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covering the behavior and ecology of the northern fur seal, this book is a model long-term study of marine mammals, one that tests theory through both observation of undisturbed behavior and manipulative experiments on individuals. Here Roger Gentry draws on nearly two decades of research on three different islands to show how behavior among these seals changes with population size, sex ratio, and environment, to explain the behavior of the population beginning with individuals, and to generalize the results to other members of the eared seal family. In so doing, he offers one of the most comprehensive studies of its kind on any marine mammal species to date. Gentry shows that the species is driven by very different behavioral traits than have been assumed for it in the past. His book analyzes behavior on scales of hours to lifetimes, investigates the mating system, considers processes that underlie the mating system (site fidelity, behavioral estrus, and the development of territoriality), and addresses specific aspects of maternal strategy (female attendance behavior, pup growth, seasonal influences, and the effects of continental shelf width). Gentry contributes to knowledge about marine mammals by providing a very specific basis for interspecies comparisons, and he suggests a link between population trend and environmental regime shifts. He also guides the debate over seal mating systems from an interpretive to an empirical or experimental basis. Originally published in 1997. The Princeton Legacy Library uses the latest print-on-demand technology to again make available previously out-of-print books from the distinguished backlist of Princeton University Press. These editions preserve the original texts of these important books while presenting them in durable paperback and hardcover editions. The goal of the Princeton Legacy Library is to vastly increase access to the rich scholarly heritage found in the thousands of books published by Princeton University Press since its founding in 1905.
Book Synopsis On the estimation of numbers of northern fur seal, Callorhinus ursinus, pups born on St Paul Island, 1980-86 by : A.E. YORK
Download or read book On the estimation of numbers of northern fur seal, Callorhinus ursinus, pups born on St Paul Island, 1980-86 written by A.E. YORK and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Migration of Northern Fur Seal "Callorhinus Ursinus" Pups in the Bering Sea by : Timothy J. Ragen
Download or read book Migration of Northern Fur Seal "Callorhinus Ursinus" Pups in the Bering Sea written by Timothy J. Ragen and published by . This book was released on 1990 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides information on the migratory timing and route followed by fur seal (Callorhinus ursinus) pups upon their seasonal departure from St. Paul Island in the St. George Basin of the Bering Sea.
Book Synopsis Comparison of Foraging Patterns Between Northern Fur Seal (Callorhinus Ursinus) Pups and Adult Females from San Miguel Island, California Using Stable Isotope Analysis by : Tanner Howard
Download or read book Comparison of Foraging Patterns Between Northern Fur Seal (Callorhinus Ursinus) Pups and Adult Females from San Miguel Island, California Using Stable Isotope Analysis written by Tanner Howard and published by . This book was released on 2018 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ecogeochemistry has become a useful tool in studying foraging ecology of marine mammals and other consumers. Ratios of stable carbon ([delta]13C) and nitrogen ([delta]15N) isotopes in consumer tissues can reflect foraging history over longer time spans than traditional methods of dietary analysis. To better understand overall foraging patterns and potential stable isotope relationships between individuals from different age groups within the same population, I measured stable isotope values from unrelated northern fur seal (Callorhinus ursinus) pups and post-parturient adult females from San Miguel Island, California. Fur seals at San Miguel Island can be severely impacted by climate events such as the El Niño Southern Oscillation, increasing the need to further understand their foraging ecology. I analyzed sequential [delta]13C and [delta]15N values along single whiskers from five pups and five adult females, estimated pup and in utero whisker growth rates, and reconstructed stable isotope profiles over time for each vibrissa. I then performed correlation tests on the stable isotope profiles to compare mean [delta]13C and [delta]15N values from pups and adult females. Pups had significantly lower [delta]13C values and significantly higher [delta]15N values than adult females over an overlapping 50-day period prior to tissue collection. Stable isotope profiles for pups were significantly correlated, but there were no correlations among adult female stable isotope profiles. My results suggest large inter-individual variation among adult female foraging patterns, no significant relationship between stable isotope values from unrelated pups and adult females, and potentially distinct stable isotope minima indicating the birth event for pups.
Book Synopsis The Northern Fur Seal by : Ralph C. Baker
Download or read book The Northern Fur Seal written by Ralph C. Baker and published by . This book was released on 1970 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Booklet describing early history of fur sealing; the distribution and movement of northern fur seals; Callorhinus Ursinus, their food, physical characteristics, reproduction and mortality and disease, management and research; sealing on the Pribilof Islands and processing and sale of fur seal skins.
Book Synopsis Journal of Experimental Biology by :
Download or read book Journal of Experimental Biology written by and published by . This book was released on 2005 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Conservation Plan for the Northern Fur Seal, Callorhinus Ursinus by :
Download or read book Conservation Plan for the Northern Fur Seal, Callorhinus Ursinus written by and published by . This book was released on 1993 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: