California Sea Lions and Steelhead Trout at the Chittenden Locks, Seattle, Washington PDF Download
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Author: Mark A. Fraker
Publisher:
ISBN:
Category : California sea lion
Languages : en
Pages : 98
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Book Description
Author: Mark A. Fraker
Publisher:
ISBN:
Category : California sea lion
Languages : en
Pages : 98
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 124
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Book Description
Author:
Publisher:
ISBN:
Category : Fishery resources
Languages : en
Pages : 228
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Book Description
Author:
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 280
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Book Description
Author: Food and Agriculture Organization of the United Nations
Publisher: Food & Agriculture Org.
ISBN: 9251306435
Category : Young Adult Nonfiction
Languages : en
Pages : 124
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Book Description
The workshop discussed current knowledge on marine mammal bycatch questions, evaluated the efficacy of measures for mitigating bycatch, reviewed techniques across different gear types and recommended that FAO develop Technical Guidelines.
Author:
Publisher:
ISBN:
Category : Bird surveys
Languages : en
Pages : 394
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Book Description
Author: Claudio Campagna
Publisher: Springer Nature
ISBN: 3030591840
Category : Nature
Languages : en
Pages : 667
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Book Description
This book is focused on the marine mammalian groups the Otariidae and the Odobenidae, otherwise known as fur seals, sea lions and the walrus. In 30 chapters, more than 60 authors from 30 institutions and 13 nationalities, discuss a broad suite of topics from maternal care and mating behavior, through play, cognition and personality, to adaptation to life in the Anthropocene. The authors explore the behaviors that have allowed these semi-aquatic mammals to thrive in the marine realm. Many populations have recovered following historical decimation, with interesting evolutionary consequences which are explored. Detailed, selected, individual species descriptions are also provided, showcasing the behavioral diversity of this engaging, adaptive and highly successful group of marine mammals.
Author: Anita L. Lopez
Publisher:
ISBN:
Category : Endangered species
Languages : en
Pages : 326
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Book Description
Author: Peggy J. Busby
Publisher:
ISBN:
Category : Endangered species
Languages : en
Pages : 482
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Book Description
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309176204
Category : Technology & Engineering
Languages : en
Pages : 472
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Book Description
The importance of salmon to the Pacific Northwestâ€"economic, recreational, symbolicâ€"is enormous. Generations ago, salmon were abundant from central California through Idaho, Oregon, and Washington to British Columbia and Alaska. Now they have disappeared from about 40 percent of their historical range. The decline in salmon numbers has been lamented for at least 100 years, but the issue has become more widespread and acute recently. The Endangered Species Act has been invoked, federal laws have been passed, and lawsuits have been filed. More than $1 billion has been spent to improve salmon runsâ€"and still the populations decline. In this new volume a committee with diverse expertise explores the complications and conflicts surrounding the salmon problemâ€"starting with available data on the status of salmon populations and an illustrative case study from Washington state's Willapa Bay. The book offers specific recommendations for salmon rehabilitation that take into account the key role played by genetic variability in salmon survival and the urgent need for habitat protection and management of fishing. The committee presents a comprehensive discussion of the salmon problem, with a wealth of informative graphs and charts and the right amount of historical perspective to clarify today's issues, including: Salmon biology and geographyâ€"their life's journey from fresh waters to the sea and back again to spawn, and their interaction with ecosystems along the way. The impacts of human activitiesâ€"grazing, damming, timber, agriculture, and population and economic growth. Included is a case study of Washington state's Elwha River dam removal project. Values, attitudes, and the conflicting desires for short-term economic gain and long-term environmental health. The committee traces the roots of the salmon problem to the extractive philosophy characterizing management of land and water in the West. The impact of hatcheries, which were introduced to build fish stocks but which have actually harmed the genetic variability that wild stocks need to survive. This book offers something for everyone with an interest in the salmon issueâ€"policymakers and regulators in the United States and Canada; environmental scientists; environmental advocates; natural resource managers; commercial, tribal, and recreational fishers; and concerned residents of the Pacific Northwest.
