Author: William J. McNeilPublisher:
ISBN:
Category : Fishes
Languages : en
Pages : 20
Book Description
Distribution of Spawning Pink Salmon in Sashin Creek, Southeastern Alaska, and Survival of Their Progeny
Author: William J. McNeilPublisher:
ISBN:
Category : Fishes
Languages : en
Pages : 20
Book Description
Distribution of Spawning Pink Salmon in Sashin Creek, Southeastern Alaska, and Survival of Their Progeny (Classic Reprint)
Author: William J. McneilPublisher: Forgotten Books
ISBN: 9780666065162
Category : Business & Economics
Languages : en
Pages : 24
Book Description
Excerpt from Distribution of Spawning Pink Salmon in Sashin Creek, Southeastern Alaska, and Survival of Their Progeny Although the upper area was highly productive of pink salmon fry, it has had intensive spawning only in years when the density of spawners was high. When the density was low, spawners tended to concentrate in the lower area. The validity of the supposition that only highly productive spawning beds are used when escapements are small is questioned. The observations at Sashin Creek indicate that relatively large escapements help ensure complete use of productive spawning beds. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Transplanting Adult Pink Salmon to Sashin Creek, Baranof Island, Alaska, and Survival of Their Progeny
Author: William J. McNeilPublisher:
ISBN:
Category : Baranof Island (Alaska)
Languages : en
Pages : 20
Book Description
Return and Behavior of Adults of the First Filial Generation of Transplanted Pink Salmon and Survival of Their Progeny, Sashin Creek, Baranof Island, Alaska
Author: Robert J. EllisPublisher:
ISBN:
Category : Baranof Island (Alaska)
Languages : en
Pages : 24
Book Description
Special Scientific 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.
The Forest Ecosystem of Southeast Alaska
Author: William R. MeehanPublisher:
ISBN:
Category : Fishes
Languages : en
Pages : 52
Book Description
The Forest Ecosystem of Southeast Alaska
Author: Hydrological Conditions in Clear Lake, Texas, 1958-66
Author: Edward J. PullenPublisher:
ISBN:
Category : Estuaries
Languages : en
Pages : 582
Book Description
Yakima River Basin and Canyon Ferry
Author: United States. Congress. House. Committee on Natural Resources. Subcommittee on Oversight and InvestigationsPublisher:
ISBN:
Category : Law
Languages : en
Pages : 352
Book Description