Sockeye Salmon Mark-recapture and Radio Telemetry Studies at McDonald Lake in 2007 PDF Download

Author: Steven C. Heinl
Publisher:
ISBN:
Category : Fish populations
Languages : en
Pages : 39

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Author: Steven C. Heinl
Publisher:
ISBN:
Category : Fish populations
Languages : en
Pages : 22

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Author: Andrew J. McGregor
Publisher:
ISBN:
Category : Escapement (Fisheries)
Languages : en
Pages : 48

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Author: Malika T. Brunette
Publisher:
ISBN:
Category : Fish populations
Languages : en
Pages : 42

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Due to a persistent decline in escapement, the McDonald Lake sockeye salmon run was classified a stock of management concern in 2009, and an action plan was developed to rebuild the stock. Measures to reduce commercial harvest and improve stock assessment were established, and a new program to evaluate information from a recent stocking program was developed. Southern Southeast Regional Aquaculture Association collected eggs from McDonald Lake (2007-2009), thermal marked and reared the fry at Burnett Inlet Hatchery then released them as full-term smolt in McDonald Lake (2009-2011). To obtain potentially improved information on the timing and distribution of McDonald Lake sockeye salmon in commercial fisheries affected by the action plan, we analyzed otoliths from sockeye salmon harvested in southern Southeast Alaska purse seine and drift gillnet fisheries (2011-2014). Although few thermal marked McDonald Lake sockeye salmon were recovered in most fisheries, peak harvests occurred in the District 106 drift gillnet and District 101-outside purse seine fisheries during and immediately after the weeks of action plan fishery closures, which corroborated results from a recent genetic stock identification analysis and previous tagging studies. Migratory timing of thermal marked fish indicated shifting the action plan later by one statistical week could improve its efficacy. Otoliths from the McDonald Lake escapement were also analyzed (2011-2014). Annual contributions of stocked fish ranged from 0.5% (2014) to 19% (2012) of the escapement. Estimated smolt-to-adult survival was highest for the 2007 brood year (7.5%) and very poor for the 2008 brood year (

Author: Stan R. Carlson
Publisher:
ISBN:
Category : Escapement (Fisheries)
Languages : en
Pages : 46

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From July 21 to September 13, 1997, a fish counting weir was operated below the outlet of Larson Lake, a major producer of sockeye salmon (Oncorhynchus nerka) in the Susitna River Watershed. A mark-recapture (M-R) experiment revealed that the type and method of primary and secondary tagging may be critical to success of recovery sampling conducted in spawning grounds.

Author: James Everett Andel
Publisher:
ISBN:
Category : Fish populations
Languages : en
Pages : 53

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Author: Cornelis Groot
Publisher: UBC Press
ISBN: 9780774803595
Category : Nature
Languages : en
Pages : 602

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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: David H. Johnson
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 504

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This is the first publication to collect, standardize, and recommend a scientifically rigorous set of field protocols for monitoring and assessing salmon and trout populations. Includes five additional techniques that can be used with any of the 13 principle methods to supplement information gathered.Over four dozen fisheries experts throughout the U.S. Pacific Northwest and beyond contributed their time to pick, write, and review the most reliable protocols for enumerating salmonids in the field. Presented in an easy to use format, each of the 18 peer-reviewed protocols covers objectives, sample design, data handling, personnel and operational requirements, and field and office techniques, including survey forms.Standardized monitoring protocols will improve data reliability, maximize opportunities for data sharing and data set comparability, and ultimately improve the ability to assess status and trends. The Handbook will also support consistency in data collection for salmonids at the international level.

Author: Noah S. Adams
Publisher:
ISBN: 9781934874264
Category : Fishes
Languages : en
Pages : 543

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Author: IUCN/SSC Tortoise and Freshwater Turtle Specialist Group
Publisher: IUCN
ISBN: 2880329868
Category : Nature conservation
Languages : en
Pages : 210

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