Pelage and Surface Topography of the Northern Fur Seal PDF Download
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Author: Victor B. Scheffer
Publisher:
ISBN:
Category : Fur
Languages : en
Pages : 576
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Author: Victor B. Scheffer
Publisher:
ISBN:
Category : Fur
Languages : en
Pages : 576
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Book Description
Author: Roger L. Gentry
Publisher: Princeton University Press
ISBN: 1400864720
Category : Science
Languages : en
Pages : 409
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Book Description
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.
Author: Teresa Clocksin
Publisher:
ISBN:
Category : Northern fur seal
Languages : en
Pages : 212
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Book Description
1327 citations of publications dealing with the northern fur seal (Callorhinus ursinus). Includes subject index. Draft copy.
Author: Victor B. Scheffer
Publisher:
ISBN:
Category : Molting
Languages : en
Pages : 44
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Author:
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 136
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Book Description
Author: Howard A. Loeb
Publisher:
ISBN:
Category : Carp
Languages : en
Pages : 682
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Author:
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 676
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Book Description
Author: U.S. Fish and Wildlife Service
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 574
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Book Description
Author: D. Renouf
Publisher: Springer Science & Business Media
ISBN: 9401131007
Category : Science
Languages : en
Pages : 424
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Book Description
We teach our students of behavioural science that one first defines a research problem, and then the most appropriate animal is selected to investigate hypotheses. The reverse order of events is improper: a particular class of animals should not be studied for its own sake. In the case of the Pinnipeds (seals, sea lions, fur seals and walruses) the organism and the problem are essentially the same. The research questions presented in this volume in one way or another relate to survival in two worlds, the ocean for foraging, and the terrain at its edge or frozen above it for breeding. The evolution of Pinniped behaviour and the mechanisms which underlie it are a consequence of having to cope with two seemingly incompatible sets of environmental constraints. The physiological adaptations for concomitant functioning in two media with very different physical characteristics have produced correlated behav ioural modifications. The energetic demands of reproduction and foraging are idiosyncratic because each activity occurs on opposite sides of the air/water interface. As a result, the mating system must reconcile aquatic design for such functions as locomotion and thermoregulation, with the terrestrial requirements for successful pupping. Similarly, the ecology of this dual habitat prescribes the rules governing the behaviour of the neonate and its interactions with its mother.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 144
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Book Description
