Author: Michael L. McCurdyPublisher:
ISBN:
Category : Salmon fisheries
Languages : en
Pages : 107
Book Description
Bristol Bay Sockeye Salmon (Oncorhynchus Nerka), 1968
Author: Michael L. McCurdyPublisher:
ISBN:
Category : Salmon fisheries
Languages : en
Pages : 107
Book Description
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 Bulletin
Author: Proceedings of the North Pacific Aquaculture Symposium
Author: 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
Freshwaters of Alaska
Author: Alexander M. MilnerPublisher: Springer Science & Business Media
ISBN: 9780387943794
Category : Nature
Languages : en
Pages : 776
Book Description
Alaska's great size is mirrored by the large number and diversity of its freshwater ecosystems. This volume reviews and synthesizes research on a variety of Alaskan freshwaters including lakes, rivers and wetlands. The vast range of Alaskan habitats ensures that the chapters in this book will provide valuable information for readers interested in freshwaters, particularly nutrient dynamics, biotic adaptations, recovery mechanisms of aquatic biota, stream succession and the management of human-induced changes in aquatic habitats.
Catalogue of Accessioned Publications
Author: World Data Center A--OceanographyPublisher:
ISBN:
Category : Oceanography
Languages : en
Pages : 104
Book Description
General Technical Report PNW-GTR
Author: Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 990
Book Description
Author: 
Author: