Download or read book Foraging Ecology of the Sea Otter Enhydra Lutris in a Soft Sediment Community written by Jennifer M. Jolly and published by . This book was released on 1997 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Community Ecology of Sea Otters written by Glenn R. VanBlaricom and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 261 pages. Available in PDF, EPUB and Kindle. Book excerpt: The impetus for this volume comes from two sources. The first is scientific: by virtue of a preference for certain large benthic invertebrates as food, sea otters have interesting and significant effects on the structure and dynamics of nearshore communities in the North Pacific. The second is political: be cause of the precarious status of the sea otter population in coastal California, the U.S. Fish and Wildlife Service (USFWS) announced, in June 1984, a proposal to establish a new population of sea otters at San Nicolas Island, off southern California. The proposal is based on the premise that risks of catastrophic losses of sea otters, due to large oil spills, are greatly reduced by distributing the population among two geographically separate locations. The federal laws of the U.S. require that USFWS publish an Environmental Impact Statement (ElS) regarding the proposed translocation of sea otters to San Nicolas Island. The EIS is intended to be an assessment of likely bio logical, social, and economic effects of the proposal. In final form, the EIS has an important role in the decision of federal management authority (in this case, the Secretary of the Interior of the U.S.) to accept or reject the proposal.
Download or read book The Sea Otter Enhydra Lutris written by Marianne Riedman and published by . This book was released on 1991 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ethology and Behavioral Ecology of Sea Otters and Polar Bears written by Randall W. Davis and published by Springer Nature. This book was released on 2021-07-03 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sea otters and polar bears are carnivorous marine mammals that still resemble their terrestrial ancestors. Compared with Cetacea (whales and dolphins), Sirenia (dugongs and manatees), and Pinnipedia (seals, sea lions, and walrus), they are less adapted for an aquatic life and the most recently evolved among marine mammals. Sea otters are amphibious but seldom come ashore, and polar bears primarily occur on sea ice or along the shore. When at sea, both species spend most of their time swimming at the surface or making short, shallow dives when foraging or pursuing prey. Indeed, polar bears rarely pursue seals in water. Nevertheless, polar bears are powerful swimmers and will stalk seals from the water. As with many other large carnivores, they are solitary hunters. Although sea otters are gregarious and form aggregations at sea called rafts, they are primarily asocial. Except during mating, the principal interaction among sea otters occurs between a female and offspring during the six-month dependency period. In large carnivores (e.g., wolves and lions) that feed on ungulates, sociality and cooperation are favored because of the need to capture large prey and defend carcasses. Polar bears, which are the largest terrestrial carnivore, are solitary hunters of seals and are neither gregarious nor social. Males and females briefly associate during courtship and mating. During this time, males aggressively compete for females. At other times, males generally avoid each other except for aggregations of males that form while summering on land, and females with cubs avoid males, which are known for infanticide. As with sea otters, the interaction of polar bears outside of mating occurs between a female and her offspring during the 2-3 year dependency period. This interaction is critically important when altricial cubs are born in the winter den. This book provides new insight into the ethology and behavioral ecology of sea otters and polar bears. Each chapter reviews the discoveries of previous studies and integrates recent research using new techniques and technology. The authors also address historic and current anthropogenic challenges for their survival as climate change alters entire marine ecosystems.
Download or read book Sources of Variation in the Foraging Behavior and Demography of the Sea Otter Enhydra Lutris written by Martin Tim Tinker and published by Ann Arbor, Mich. : University Microfilms International. This book was released on 2004 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Journal of Experimental Biology written by and published by . This book was released on 2007 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Tool Use in Animals written by Crickette M. Sanz and published by Cambridge University Press. This book was released on 2013-03-07 with total page 325 pages. Available in PDF, EPUB and Kindle. Book excerpt: The last decade has witnessed remarkable discoveries and advances in our understanding of the tool using behaviour of animals. Wild populations of capuchin monkeys have been observed to crack open nuts with stone tools, similar to the skills of chimpanzees and humans. Corvids have been observed to use and make tools that rival in complexity the behaviours exhibited by the great apes. Excavations of the nut cracking sites of chimpanzees have been dated to around 4-5 thousand years ago. Tool Use in Animals collates these and many more contributions by leading scholars in psychology, biology and anthropology, along with supplementary online materials, into a comprehensive assessment of the cognitive abilities and environmental forces shaping these behaviours in taxa as distantly related as primates and corvids.
Download or read book Biology of the Hard Clam written by J.N. Kraeuter and published by Gulf Professional Publishing. This book was released on 2001-04-26 with total page 780 pages. Available in PDF, EPUB and Kindle. Book excerpt: Systematics and taxonomy / M.E. Harte -- Shell structure and age determination / Lowell W. Fritz -- Embryogenesis and organogenesis of veligers and early juveniles / Melbourne R. Carriker -- Anatomy and histology of Mercenaria mercenaria / Albert F. Eble -- Reproduction in Mercenaria mercenaria / Arnold G. Eversole -- Genetics of hard clams, Mercenaria mercenaria / Thomas J. Hilbish -- Functional morphology and behavior of shelled veligers and early juveniles / Melbourne R. Carriker -- Physiological ecology of Mercenaria mercenaria / Raymond E. Grizzle, V. Monica Bricelj and Sandra E. Shumway -- Demography and dynamics of hard clam populations / Stephen R. Fegley -- Integrating nutritional physiology and ecology to explain interactions between physics and biology in Mercenaria mercenaria / Charles H. Peterson -- Predators and predation / John N. Kraeuter -- Pests, parasites, diseases, and defense mechanisms of the hard clam, Mercenaria mercenaria / Susan E. Ford -- Management of hard c ...
Download or read book The Sea Otter Enhydra Lutris written by Marianne Riedman and published by . This book was released on 1990 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: A current review of the biology, ecology, and behavior of the sea otter (Enhydra lutris). Emphasis is placed on the populations and habitat in central California but results of studies in Alaska, Canada, and the Soviet Union are also covered. Management and conservation problems such as conflicts with shellfisheries and concerns about oil pollution are also touched on.
Download or read book Wild Mammals of North America written by George A. Feldhamer and published by JHU Press. This book was released on 2003-11-19 with total page 1250 pages. Available in PDF, EPUB and Kindle. Book excerpt: Table of contents
Download or read book Sea Otter Conservation written by Shawn Larson and published by Academic Press. This book was released on 2014-12-23 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sea otters are good indicators of ocean health. In addition, they are a keystone species, offering a stabilizing effect on ecosystem, controlling sea urchin populations that would otherwise inflict damage to kelp forest ecosystems. The kelp forest ecosystem is crucial for marine organisms and contains coastal erosion. With the concerns about the imperiled status of sea otter populations in California, Aleutian Archipelago and coastal areas of Russia and Japan, the last several years have shown growth of interest culturally and politically in the status and preservation of sea otter populations. Sea Otter Conservation brings together the vast knowledge of well-respected leaders in the field, offering insight into the more than 100 years of conservation and research that have resulted in recovery from near extinction. This publication assesses the issues influencing prospects for continued conservation and recovery of the sea otter populations and provides insight into how to handle future global changes. - Covers scientific, cultural, economic and political components of sea otter conservation - Provides guidance on how to manage threats to the sea otter populations in the face of future global changes - Highlights the effects that interactions of coastal animals have with the marine ecosystem
Download or read book Fishery Bulletin written by and published by . This book was released on 1983 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physiological Capabilities and Behavioral Strategies for Marine Living by the Smallest Marine Mammal the Sea Otter Enhydra Lutris written by Laura Carleen Yeates and published by . This book was released on 2006 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The World Marine Mammal Science Conference Monaco 20 24 January 1998 written by and published by . This book was released on 1998 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aquatic Mammals written by and published by . This book was released on 1998 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Marine Mammals Ashore written by Joseph R. Geraci and published by National Aquarium in Baltimore. This book was released on 2005 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprehensive manual for understanding and carrying out marine mammal rescue activities for stranded seals, manatees, dolphins, whales, or sea otters.
