Download or read book Detection of Sea Otters in Boat based Surveys of Prince William Sound Alaska written by Mark Steven Udevitz and published by . This book was released on 1995 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Boat based Population Surveys of Sea Otters Enhydra Lutris in Prince William Sound Alaska Following the Exxon Valdez Oil Spill written by Douglas M. Burn and published by . This book was released on 1994 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Prince William Sound Marine Bird Surveys Synthesis and Restoration written by Aly McKnight and published by . This book was released on 2008 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: Small boat surveys were conducted to estimate marine bird and sea otter populations in Prince William Sound, Alaska during March and July 2007, using methods developed in 1989-1991. Biologists examined trends of marine birds in the oiled and unoiled areas of the sound from 1989-2007. Data indicated that most taxa for which injury was previously demonstrated were not recovering. During winter three taxa had increasing population trends, while fourteen taxa did not exhibit any trend toward recovery. During summer three taxa showed trends consistent with a recovering population, and fifteen taxa showed no trend toward recovery. Densities of sea otters in March and July surveys showed no trend toward recovery. The study focused on seabirds, but also included other birds and various marine mammals.
Download or read book Habitat Associations and Photo identification of Sea Otters in Simpson Bay Prince William Sound Alaska written by Andrea Karin Gilkinson and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Habitat associations of sea otters during resting and feeding were investigated in Simpson Bay, Prince William Sound, Alaska during the summer months of 2001-2003. Sea otter locations collected during boat surveys were overlaid on bathymetry and sediment maps and water depth, sediment type, distance from shore, and position in the bay (peripheral vs. central) was determined for each. Logistic regression analysis was used to determine whether sea otter habitat use was non-random according to any of these habitat variables. Water depth was the most significant habitat association for feeding behavior, with the majority of feeding dives occurring in shallow water less than 20m deep. Position in the bay was the most significant habitat association for resting behavior, with more otters resting in the center of the bay. In addition, digital images taken of the sea otters during the boat surveys of 2002 and 2003 were used to examine the potential of using nose scars to photo-identify individual sea otters. Both male and female sea otters bore nose scars. Forty-five percent of all individuals encountered were considered identifiable from nose scars and a total of 114 individuals were identified. This compares favorably with the results of photo-identification studies of other marine mammals, suggesting that photo-identification may be a useful tool for the individual identification of sea otters as well.
Download or read book Estimates of Marine Bird and Sea Otter Abundance in Lower Cook Inlet Alaska During Summer 1993 and Winter 1994 written by and published by . This book was released on 1995 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Otters written by Hans Kruuk and published by OUP Oxford. This book was released on 2006-08-17 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt: Otters are highly charismatic and popular animals of very considerable concern to conservationists worldwide. Written by the pre-eminent authority in the field, this book builds on the reputation of the author's landmark monograph of the European otter, Wild Otters (OUP, 1995). Furthermore, its broader scope to include all species of otter in North America as well as Europe and elsewhere leads to a deeper synthesis that greatly expands the book's overall relevance and potential readership. Aimed at naturalists, scientists and conservationists, its personal style and generously illustrated text will appeal to amateurs and professionals alike. It emphasises recent research and conservation management initiatives for all 13 species of otter worldwide, incorporates recent molecular research on taxonomy and population genetics, and discusses the wider implications of otter studies for ecology and conservation biology. As well as enchanting direct observations of the animals, there is guidance about how and where to watch and study them. From otters in the British and American lakes and rivers, to sea otters in the Pacific Ocean, giant otters in the Amazon and other species in Africa and Asia, this book provides an engaging approach to their fascinating existence, to the science needed to understand it, and to the very real threats to their survival.
Download or read book Sea Otter Symposium written by David Jonathan Cooper and published by . This book was released on 1990 with total page 944 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book 1993 Trial Aerial Survey of Sea Otters in Prince William Sound Alaska written by James Lee Bodkin and published by . This book was released on 1996 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sea Otter Symposium written by Keith Bayha and published by . This book was released on 1991 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aquatic Sciences and Fisheries Abstracts written by and published by . This book was released on 1995-05 with total page 814 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Marine Mammals and Noise written by W. John Richardson and published by Academic Press. This book was released on 2013-10-22 with total page 593 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many marine mammals communicate by emitting sounds that pass through water. Such sounds can be received across great distances and can influence the behavior of these undersea creatures. In the past few decades, the oceans have become increasingly noisy, as underwater sounds from propellers, sonars, and other human activities make it difficult for marine mammals to communicate. This book discusses, among many other topics, just how well marine mammals hear, how noisy the oceans have become, and what effects these new sounds have on marine mammals. The baseline of ambient noise, the sounds produced by machines and mammals, the sensitivity of marine mammal hearing, and the reactions of marine mammals are also examined. An essential addition to any marine biologist's library, Marine Mammals and Noise will be especially appealing to marine mammalogists, researchers, policy makers and regulators, and marine biologists and oceanographers using sound in their research.
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 Steller Sea Lion and Northern Fur Seal Research written by and published by . This book was released on 2007 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Steller Sea Lion and Northern Fur Seal Research Purpose and need Alternatives Affected environment Environmental consequences National Environmental Policy Act compliance implementation and recommendations List of preparers List of agencies organizations and persons whom the draft EIS was sent References Index written by United States. National Marine Fisheries Service. Office of Protected Resources. Permits Division and published by . This book was released on 2007 with total page 1128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sea Otter Mortality in Orca Inlet Prince William Sound Alaska Winter 1995 96 written by Brenda Elizabeth Ballachey and published by . This book was released on 2002 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Our objective was to evaluate sea otter mortality in Orca Inlet in the late winter of 1996 by examining (1) the demographic pattern of the die-off, using carcass surveys, (2) the physical condition, evidence of disease, and causes of death, by necropsy, (3) changes in abundance in sea otters using aerial surveys, and (4) contributing causes, including weather and adverse interactions with area fisheries"--P. 1.
Download or read book Restoration Update written by and published by . This book was released on 1994 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wildlife Review written by and published by . This book was released on 1995 with total page 606 pages. Available in PDF, EPUB and Kindle. Book excerpt:
