California Sea Lions and Steelhead Trout at the Chittenden Locks, Seattle, Washington
Author : Mark A. Fraker
Publisher :
Page : 98 pages
File Size : 46,45 MB
Release : 1994
Category : California sea lion
ISBN :
Author : Mark A. Fraker
Publisher :
Page : 98 pages
File Size : 46,45 MB
Release : 1994
Category : California sea lion
ISBN :
Author :
Publisher :
Page : 124 pages
File Size : 39,80 MB
Release : 1989
Category :
ISBN :
Author :
Publisher :
Page : 228 pages
File Size : 33,94 MB
Release : 1993
Category : Fishery resources
ISBN :
Author :
Publisher :
Page : 280 pages
File Size : 23,18 MB
Release : 1991
Category : Fisheries
ISBN :
Author : National Research Council
Publisher : National Academies Press
Page : 472 pages
File Size : 37,55 MB
Release : 1996-07-17
Category : Technology & Engineering
ISBN : 0309176204
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.
Author : Committee on Scientific Issues in the Endangered Species Act
Publisher : National Academies Press
Page : 289 pages
File Size : 47,76 MB
Release : 1995-10-27
Category : Science
ISBN : 0309176190
The Endangered Species Act (ESA) is a far-reaching law that has sparked intense controversies over the use of public lands, the rights of property owners, and economic versus environmental benefits. In this volume a distinguished committee focuses on the science underlying the ESA and offers recommendations for making the act more effective. The committee provides an overview of what scientists know about extinction--and what this understanding means to implementation of the ESA. Habitat--its destruction, conservation, and fundamental importance to the ESA--is explored in detail. The book analyzes Concepts of species--how the term "species" arose and how it has been interpreted for purposes of the ESA. Conflicts between species when individual species are identified for protection, including several case studies. Assessment of extinction risk and decisions under the ESA--how these decisions can be made more effectively. The book concludes with a look beyond the Endangered Species Act and suggests additional means of biological conservation and ways to reduce conflicts. It will be useful to policymakers, regulators, scientists, natural-resource managers, industry and environmental organizations, and those interested in biological conservation.
Author :
Publisher :
Page : 394 pages
File Size : 27,18 MB
Release : 1990
Category : Bird surveys
ISBN :
Author : Food and Agriculture Organization of the United Nations
Publisher : Food & Agriculture Org.
Page : 124 pages
File Size : 17,47 MB
Release : 2018-08-29
Category : Young Adult Nonfiction
ISBN : 9251306435
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 :
Page : 170 pages
File Size : 23,33 MB
Release : 1992
Category : Fisheries
ISBN :
Author : Anita L. Lopez
Publisher :
Page : 326 pages
File Size : 15,94 MB
Release : 1999
Category : Endangered species
ISBN :