California Sea Lion (Zalophus Californianus) and Steller Sea Lion (Eumetopias Jubatus) Interactions with Vessels in Pacific Rim National Park Reserve PDF Download

Author: Wendy Renee Szaniszlo
Publisher:
ISBN:
Category : California sea lion
Languages : en
Pages : 138

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Author: Todd J. Braje
Publisher: Univ of California Press
ISBN: 0520267265
Category : Nature
Languages : en
Pages : 328

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“The bones recovered from the middens of the northeastern Pacific shorelines have important stories to tell biologists, marine mammalogists, and those concerned with marine conservation. This volume unearths a wealth of information about the historical ecology of seals, sea lions, and sea otters in the North Pacific that spans thousands of years. It provides fascinating insights into how the world once looked, and how it may one day look again as seals, sea lions, and sea otters reclaim and recolonize their former haunts.”—Andrew Trites, Director, Marine Mammal Research Unit, University of British Columbia “Braje and Rick have assembled a compelling set of case studies on the long-term and complex interactions between people, marine mammals, and environments in the Northeast Pacific. The promise of zooarchaeology as historical science is on full display, as researchers use geochemistry, aDNA, morphometrics, and traditional analytic methods to address questions of utmost importance to the long-term health of coastal ecosystems. If this book doesn't convince conservation biology about the need to take the long view of animal histories and ecosystems into account in developing conservation management plans, I'm not sure what will.”—Virginia L. Butler, Department of Anthropology, Portland State University

Author: Aaron J. Poe
Publisher: University of Arizona Press
ISBN: 0816537607
Category : Nature
Languages : en
Pages : 384

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When the Exxon Valdez oil tanker ran aground on Bligh Reef in Alaska in 1989 and spilled 11 million gallons of oil, it changed Prince William Sound forever. The catastrophe disrupted the region’s biological system, killing countless animals and poisoning habitats that to this day no longer support some of the local species. The effects have also profoundly altered the way people use this region. Nearly three decades later, changes in recreation use run counter to what was initially expected. Instead of avoiding Prince William Sound, tourists and visitors flock there. Economic revitalization efforts have resulted in increased wilderness access as new commercial enterprises offer nature tourism in remote bays and fjords. This increased visitation has caused concerns that the wilderness may again be threatened—not by oil but rather by the very humans seeking those wilderness experiences. In Sustaining Wildlands, scientists and managers, along with local community residents, address what has come to be a central paradox in public lands management: the need to accommodate increasing human use while reducing the environmental impact of those activities. This volume draws on diverse efforts and perspectives to dissect this paradox, offering an alternative approach where human use is central to sustaining wildlands and recovering a damaged ecosystem like Prince William Sound. Contributors: Brad A. Andres, Chris Beck, Nancy Bird, Dale J. Blahna, Harold Blehm, Sara Boario, Bridget A. Brown, Courtney Brown, Greg Brown, Milo Burcham, Kristin Carpenter, Ted Cooney, Patience Andersen Faulkner, Maryann Smith Fidel, Jessica B. Fraver, Jennifer Gessert, Randy Gimblett, Michael I. Goldstein, Samantha Greenwood, Lynn Highland, Marybeth Holleman, Shay Howlin, Tanya Iden, Robert M. Itami, Lisa Jaeger, Laura A. Kennedy, Spencer Lace, Nancy Lethcoe, Kate McLaughlin, Rosa H. Meehan, Christopher Monz, Karen A. Murphy, Lisa Oakley, Aaron J. Poe, Chandra B. Poe, Karin Preston, Jeremy Robida, Clare M. Ryan, Gerry Sanger, Bill Sherwonit, Lowell H. Suring, Paul Twardock, Sarah Warnock, and Sadie Youngstrom

Author: Michael A. Bigg
Publisher: Fisheries and Oceans, Scientific Information and Publications Branch
ISBN:
Category : California sea lion
Languages : en
Pages : 32

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Aerial censuses were undertaken for Steller sea lions (Eumetopias jubatus) and California sea lions (Zalophus californianus) during 1971-84, and a review was made of published and unpublished data on numbers seen and numbers killed since 1913. These data were used to describe the location of haulout sites, season of occupation at haulout sites, regional movement patterns, and trends in numbers seen for each species during this century.

Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 316

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"Education, arts and social sciences, natural and technical sciences in the United States and Canada".

Author:
Publisher:
ISBN:
Category : Rare mammals
Languages : en
Pages : 108

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Author: Nathan James Soboleff
Publisher:
ISBN:
Category : Steller's sea lion
Languages : en
Pages : 248

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"Are spatial and temporal patterns of Steller sea lion declines consistent with development of certain state-managed commercial fisheries and vessel activity? This question motivated our analysis of data from the National Marine Fisheries Service count database and the Alaska Department of Fish and Game's (ADF & G) Fish Ticket database on state managed commercial fisheries from 1976 to 2002. Rookery groupings for Steller sea lions were formed based on spatial patterns of covariation of similar population declines. Using query reports from ADF & G, commercial fisheries statistical areas were selected within 50-nm radii of rookery groupings and analyzed for potential fisheries interactions. Negative correlations between state-managed fisheries for groundfish and salmon fisheries were found but few were statistically significant. Low statistical power constrained some of these tests. Many state-managed fisheries for shellfish (shrimp, king, and Tanner crab) were positively correlated with Steller sea lion declines, but again few were statistically significant. Rather than suggesting that somehow sea lions benefit from these fisheries, positive correlations are more likely to be indicative of covariation of sea lions and fisheries with common environmental factors. Field research into groundfish and salmon fisheries interactions, perhaps coupled with experimental management, is necessary to confirm causes of Steller sea lion declines"--Leaf iii.

Author: Dana J. Seagars
Publisher:
ISBN:
Category : California sea lion
Languages : en
Pages : 72

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Author:
Publisher:
ISBN:
Category : California sea lion
Languages : en
Pages : 88

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Author: National Research Council
Publisher: National Academies Press
ISBN: 0309086329
Category : Science
Languages : en
Pages : 217

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For an unknown reason, the Steller sea lion population in Alaska has declined by 80% over the past three decades. In 2001, the National Research Council began a study to assess the many hypotheses proposed to explain the sea lion decline including insufficient food due to fishing or the late 1970s climate/regime shift, a disease epidemic, pollution, illegal shooting, subsistence harvest, and predation by killer whales or sharks. The report's analysis indicates that the population decline cannot be explained only by a decreased availability of food; hence other factors, such as predation and illegal shooting, deserve further study. The report recommends a management strategy that could help determine the impact of fisheries on sea lion survival-establishing open and closed fishing areas around sea lion rookeries. This strategy would allow researchers to study sea lions in relatively controlled, contrasting environments. Experimental area closures will help fill some short-term data gaps, but long-term monitoring will be required to understand why sea lions are at a fraction of their former abundance.