Oceanic Feeding Habits of the Sockeye Salmon, Oncorhynchus Nerka (Walbaum), in Aleutian Waters PDF Download
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Author: Michael B. Dell
Publisher:
ISBN:
Category : Salmon
Languages : en
Pages : 52
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Author: Michael B. Dell
Publisher:
ISBN:
Category : Salmon
Languages : en
Pages : 52
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Author:
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 242
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 428
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Author: Bruce Charles McIntosh
Publisher:
ISBN:
Category : Decapoda (Crustacea)
Languages : en
Pages : 190
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Book Description
"The diet and feeding behavior of maturing sockeye salmon (Oncorhynchus nerka) were investigated during the final marine phase of the spawning migration, prior to reentering natal streams. The stomach contents of commercially caught sockeye salmon, migrating within the nearshore waters of the Kodiak Archipelago during 1998 and 1999, were examined to determine the level of feeding activity and taxa of dominant prey items. Samples were collected throughout the majority of the migration (early June to late August) from areas known to be used principally as migration corridors, and from areas proximate to several natal streams. Dominant prey of sockeye salmon were decapod larvae, Pacific sandlance (Ammodytes hexapterus), and the pteropod Limacina helicina. Feeding activity levels and dominant prey taxa varied both between areas and within areas over time. Feeding activity levels for the population appear to gradually diminish, rather than abruptly ceasing, as sockeye approach their natal streams to spawn"--Leaf iii.
Author: F. Favorite
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 312
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Author:
Publisher:
ISBN:
Category : Continental shelf
Languages : en
Pages : 780
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Author: Albert V. Tyler
Publisher:
ISBN:
Category : Decapoda (Crustacea)
Languages : en
Pages : 34
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Book Description
"The diet and feeding behavior of maturing sockeye salmon (Oncorhynchus nerka) were investigated during the final marine phase of the spawning migration, prior to reentering natal streams. The stomach contents of commercially caught sockeye salmon, migrating within the nearshore waters of the Kodiak Archipelago during 1998 and 1999, were examined to determine the level of feeding activity and taxa of dominant prey items. Samples were collected throughout the majority of the migration (early June to late August) from areas known to be used principally as migration corridors, and from areas proximate to several natal streams. Dominant prey of sockeye salmon were decapod larvae, Pacific sandlance (Ammodytes hexapterus), and the pteropod Limacina helicina. Feeding activity levels and dominant prey taxa varied both between areas and within areas over time. Feeding activity levels for the population appear to gradually diminish, rather than abruptly ceasing, as sockeye approach their natal streams to spawn"--Leaf iii.
Author: Cornelis Groot
Publisher: UBC Press
ISBN: 9780774803595
Category : Nature
Languages : en
Pages : 602
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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.
Author: Richard Gard
Publisher:
ISBN:
Category : Sockeye salmon
Languages : en
Pages : 428
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Author: William J. McNeil
Publisher: Oregon State University Press
ISBN:
Category : Nature
Languages : en
Pages : 358
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