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1981 Evaluation Of The Population Status Of Harbor Seals In Aialik Bay Kenai Fjords National Park
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Book Synopsis 1981 Evaluation of the Population Status of Harbor Seals in Aialik Bay, Kenai Fjords National Park by : Anne Hoover
Download or read book 1981 Evaluation of the Population Status of Harbor Seals in Aialik Bay, Kenai Fjords National Park written by Anne Hoover and published by . This book was released on 1982 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Harbor Seal Surveys in Kenai Fjords National Park by : C. C. Bignell
Download or read book Harbor Seal Surveys in Kenai Fjords National Park written by C. C. Bignell and published by . This book was released on 1994 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Fragile Beauty by : Theodore Catton
Download or read book A Fragile Beauty written by Theodore Catton and published by . This book was released on 2010 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Status Review written by John L. Sease and published by . This book was released on 1992 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Harbor Seal Monitoring in Southern Kenai Peninsula Fjords by : Anne Hoover-Miller
Download or read book Harbor Seal Monitoring in Southern Kenai Peninsula Fjords written by Anne Hoover-Miller and published by . This book was released on 2008 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Objectives of this study were to use remotely controlled video cameras in Aialik Bay to continue monitoring long term population trends of harbor seals, assess the influence of environmental conditions on seal attendance, evaluate effects of vessel traffic (particularly kayaks) on harbor seals, and test the feasibility of using still digital cameras to monitor seals in Day Harbor"--P. 1.
Book Synopsis Alaska Harbor Seal Research Plan 2000 by : United States. National Marine Fisheries Service
Download or read book Alaska Harbor Seal Research Plan 2000 written by United States. National Marine Fisheries Service and published by . This book was released on 2000 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: Examines statewide harbor seal population abundance estimation, stock identification, trends in abundance, general biology and life history, and human interactions.
Book Synopsis Foraging Ecology, Diving Behavior, and Migration Patterns of Harbor Seals (Phoca Vitulina Richardii) from a Glacial Fjord in Alaska in Relation to Prey Availability and Oceanographic Features by : Jamie Neil Womble
Download or read book Foraging Ecology, Diving Behavior, and Migration Patterns of Harbor Seals (Phoca Vitulina Richardii) from a Glacial Fjord in Alaska in Relation to Prey Availability and Oceanographic Features written by Jamie Neil Womble and published by . This book was released on 2012 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding the movement behavior and foraging strategies of individuals across multiple spatial and temporal scales is essential not only for understanding the biological requirements of individuals but also for linking individual strategies to population level effects. Glacial fjords scattered throughout south-central and southeastern Alaska host some of the largest seasonal aggregations of harbor seals (Phoca vitulina richardii) in the world, and an estimated 15% of the harbor seal population in Alaska is found seasonally at these glacial ice sites. Over the last two decades, the number of harbor seals has declined at two of the primary glacial fjords, in Aialik Bay in south-central Alaska and in Glacier Bay in southeastern Alaska, thus raising concerns regarding the viability of seal populations in glacial fjord environments. From 2004-2009, the foraging ecology, diving behavior, and migration patterns of harbor seals from Glacier Bay National Park, Alaska were examined in relation to prey availability and oceanographic features in Glacier Bay and the surrounding regions of southeastern Alaska. Time-depth recorders, very high frequency transmitters, and satellite-linked transmitters were used to quantify the vertical and horizontal movement patterns of harbor seals in the marine environment. Specifically, (1) I characterized the diving behavior, foraging areas, and foraging strategies of female harbor seals from terrestrial and glacial ice sites relative to prey availability during the breeding season (May-June) in Glacier Bay, (2) I quantified the intra-population variation in at-sea post-breeding season (September-April) distribution and movement patterns of female harbor seals in relation to oceanographic features, (3) I quantified the post-breeding season migration patterns of female harbor seals relative to the boundaries of the marine protected area of Glacier Bay National Park, and (4) I characterized the use of the continental shelf region of the eastern Gulf of Alaska by female harbor seals from Glacier Bay, both as a foraging area and as a migratory corridor in relation to oceanographic features. During the breeding season, there was a substantial degree of intra-population variation in the diving behavior and foraging areas of juvenile and adult female seals from glacial ice and terrestrial sites in Glacier Bay. The presence of multiple diving strategies suggests that differences in the relative density and depth of prey fields in glacial ice and terrestrial habitats in addition to seal age and reproductive status may influence diving and foraging behavior of harbor seals. During the post-breeding season, juvenile and adult female harbor seals ranged extensively beyond the boundaries of the marine protected area of Glacier Bay National Park, throughout the northern inshore waters of southeastern Alaska and the continental shelf region of the eastern Gulf of Alaska between Cross Sound and Prince William Sound, Alaska (up to 900 kilometers away). Seals exhibited a relatively high degree of intra-population variation in their at-sea post-breeding season distribution patterns that may be a function of extrinsic factors such as oceanographic characteristics, which can influence prey availability as well as intrinsic factors including previous experience with foraging areas and seal condition and age. Use of the continental shelf region of the eastern Gulf of Alaska by harbor seals as a foraging area may be due to enhanced biological productivity which may be associated with ephemeral hydrographic and/or static bathymetric features. Despite extensive migrations of seals from Glacier Bay during the post-breeding season, there was a high degree of inter-annual site fidelity of seals to Glacier Bay the following breeding season after seals were captured.
Book Synopsis Behavior and Ecology of Harbor Seals (Phoca Vitulina Richardsi) Inhabiting Glacial Ice in Aialik Bay, Alaska by : Agnes Anne Hoover
Download or read book Behavior and Ecology of Harbor Seals (Phoca Vitulina Richardsi) Inhabiting Glacial Ice in Aialik Bay, Alaska written by Agnes Anne Hoover and published by . This book was released on 1983 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :United States. Congress. House. Committee on Merchant Marine and Fisheries. Subcommittee on Fisheries and Wildlife Conservation and the Environment Publisher : ISBN 13 : Total Pages :924 pages Book Rating :4.0/5 (1 download)
Book Synopsis Alaska National Interest Lands by : United States. Congress. House. Committee on Merchant Marine and Fisheries. Subcommittee on Fisheries and Wildlife Conservation and the Environment
Download or read book Alaska National Interest Lands written by United States. Congress. House. Committee on Merchant Marine and Fisheries. Subcommittee on Fisheries and Wildlife Conservation and the Environment and published by . This book was released on 1979 with total page 924 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hearings on House bill H.R. 39 that was introduced January 15, 1979 by the 96th Congress (it was an reintroduced version of House Bill H.R. 39 originally passed May 19, 1978). The 1979 version of H.R. 39 led to the December 1980 enactment of the Alaska National Interest Lands Conservation Act.
Book Synopsis Status Review by : Alaska Fisheries Science Center Nationa
Download or read book Status Review written by Alaska Fisheries Science Center Nationa and published by BiblioGov. This book was released on 2013-06 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the 1970's the National Oceanic and Atmospheric Administration (NOAA) was made to manage our oceanic and atmospheric resources. The Alaska Fisheries Science Center is the research branch for marine life and coastal oceans off parts of the U.S. west coast and Alaska. This includes the Eastern Bering Sea where some the worlds most important commercial fishing takes place. Their mission is to develop and maintain scientific exploration to help understand and manage that region's environment. Over the years there have been many reports published which discuss their findings; this is one of them.
Book Synopsis Population Evaluation of the Harbor Seal (P̀hoca Vitulina Richardi)́ in the Waters of the State of Washington by : Murray L. Johnson
Download or read book Population Evaluation of the Harbor Seal (P̀hoca Vitulina Richardi)́ in the Waters of the State of Washington written by Murray L. Johnson and published by . This book was released on 1977 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Assessing the Health of Harbor Seals in Alaska by : Stephen John Trumble
Download or read book Assessing the Health of Harbor Seals in Alaska written by Stephen John Trumble and published by . This book was released on 2003 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Declining populations of pinnipeds in the Gulf of Alaska, possibly resulting from changes in prey quality, prompted research to determine the population health status of harbor seals (Phoca vitulina) using blood chemistry and digestive constraints. Blood chemistry and morphology reference range values between two harbor seal pup populations in Alaska, one population in continued decline, Prince William Sound, and another in recent increase, Tugidak Island, offered clues that blood values can vary on the population scale and that health assessment must utilize an appropriate set of reference values for valid comparisons. Subsequently, a captive study involving harbor seals yielded changes in ten blood chemistry or hematology values as a function of season and diet. These data provided evidence that populations may have distinct "identities" based on blood chemistry values. The "metabolic identity" of a population provides evidence of the relationship between environmental stressors and the genetic capacity of the animal to respond to metabolic demands. This made it possible to better understand population level differentiation in plasma chemistry values and thus assess the health of animals occupying the outlier regions of populations, since these regions are often suggestive of poor health. A captive study involving harbor seals, which are known to consume the low quality prey (pollock) implicated in the declines of many species of birds and mammals in the Gulf of Alaska, yielded consistent dry matter digestibility resulting in greater gut fill from pollock than from herring. Digestible energy intakes from pollock were greater than from either herring or the mixed diet. Lipid digestibility of herring declined from 90% to 50% when lipid intake exceeded 60 g kg −07̇5 d−1. Results of this study imply that a flexible digestive system for harbor seals can compensate for ingesting a prey of low energy density by increasing gut fill and enhancing protein and lipid assimilation, to sustain digestible energy intake. In other words, harbor seals can offset differences in prey quality if prey availability and abundance does not limit the physiological plasticity of their digestive system to maintain their supply of energy and nutrients"--Leaves iii-iv.
Book Synopsis Recent History and Demography of Harbor Seals on Tugidak Island, Alaska by : Lauri A. Jemison
Download or read book Recent History and Demography of Harbor Seals on Tugidak Island, Alaska written by Lauri A. Jemison and published by . This book was released on 1997 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Population Status and Condition of the Harbor Seal P̲h̲o̲c̲a̲ V̲i̲t̲u̲l̲i̲n̲a̲ R̲i̲c̲h̲a̲r̲d̲s̲i̲, in the Waters of the State of Washington: 1975-1980 by : Steven J. Jeffries
Download or read book Population Status and Condition of the Harbor Seal P̲h̲o̲c̲a̲ V̲i̲t̲u̲l̲i̲n̲a̲ R̲i̲c̲h̲a̲r̲d̲s̲i̲, in the Waters of the State of Washington: 1975-1980 written by Steven J. Jeffries and published by . This book was released on 1990 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluation of Alaska Harbor Seal (Phoca Vitulina) Population Surveys by : Milo Douglas Adkinson
Download or read book Evaluation of Alaska Harbor Seal (Phoca Vitulina) Population Surveys written by Milo Douglas Adkinson and published by . This book was released on 2001 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: Examines harbor seal population surveys in the portion of the Gulf of Alaska affected by the Exxon Valdez oil spill using computer simulation in order to evaluate alternative survey designs and effects of animal movement, variation in molt timing, inter-site trend variability, and other factors thought to affect the surveys.
Book Synopsis Seasonal Abundance, Distribution, and Ecology of the Harbor Seal, Phoca Vitulina Richardsi, on San Miguel Island, California by : Brent S Stewart
Download or read book Seasonal Abundance, Distribution, and Ecology of the Harbor Seal, Phoca Vitulina Richardsi, on San Miguel Island, California written by Brent S Stewart and published by . This book was released on 1981 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Research Study of the Reactions of Wildlife to Boating Activity Along Kenai Fjords Coastline by : Edward C. Murphy
Download or read book Research Study of the Reactions of Wildlife to Boating Activity Along Kenai Fjords Coastline written by Edward C. Murphy and published by . This book was released on 1981 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
