Author: Alaska. Division of State Libraries and Museums. Documents SectionPublisher:
ISBN:
Category : Government publications
Languages : en
Pages : 186
Book Description
State and Local Publications Received
Author: Alaska. Division of State Libraries and Museums. Documents SectionPublisher:
ISBN:
Category : Government publications
Languages : en
Pages : 186
Book Description
ADF&G Technical Data Report
Author: Pacific Salmon Life Histories
Author: Cornelis GrootPublisher: UBC Press
ISBN: 9780774803595
Category : Nature
Languages : en
Pages : 602
Book Description
Pacific salmon are an important biological and economic resource of countries of the North Pacific rim. They are also a unique group of fish possessing unusually complex life histories. There are seven species of Pacific salmon, five occurring on both the North American and Asian continents (sockeye, pink, chum, chinook, and coho) and two (masu and amago) only in Asia. The life cycle of the Pacific salmon begins in the autumn when the adult female deposits eggs that are fertilized in gravel beds in rivers or lakes. The young emerge from the gravel the following spring and will either migrate immediately to salt water or spend one or more years in a river or lake before migrating. Migrations in the ocean are extensive during the feeding and growing phase, covering thousands of kilometres. After one or more years the maturing adults find their way back to their home river, returning to their ancestral breeding grounds to spawn. They die after spawning and the eggs in the gravel signify a new cycle. Upon this theme Pacific salmon have developed many variations, both between as well as within species. Pacific Salmon Life Histories provides detailed descriptions of the different life phases through which each of the seven species passes. Each chapter is written by a scientist who has spent years studying and observing a particular species of salmon. Some of the topics covered are geographic distribution, transplants, freshwater life, ocean life, development, growth, feeding, diet, migration, and spawning behaviour. The text is richly supplemented by numerous maps, illustrations, colour plates, and tables and there is a detailed general index, as well as a useful geographical index.
Fishery Research Bulletin
Author: Informational Leaflet
Author: Dictionary Catalog of the Department Library
Author: United States. Department of the Interior. LibraryPublisher:
ISBN:
Category : Library catalogs
Languages : en
Pages : 722
Book Description
Book catalog of the Library and Information Services Division
Author: Environmental Science Information Center. Library and Information Services DivisionPublisher:
ISBN:
Category :
Languages : en
Pages : 444
Book Description
Book Catalog of the Library and Information Services Division: Subject index
Author: Environmental Science Information Center. Library and Information Services DivisionPublisher:
ISBN:
Category : Earth sciences
Languages : en
Pages : 438
Book Description
Departments of State, Justice, Commerce, the Judiciary, and Related Agencies Appropriations for 1972, Hearings . . . 92d Congress, 1st Session
Author: United States. Congress. House AppropriationsPublisher:
ISBN:
Category :
Languages : en
Pages : 1576
Book Description
Grant-in-aid for Fisheries Program Activities
Author: United States. National Marine Fisheries ServicePublisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 628
Book Description