Stock Assessment and Restoration of the Afognak Lake Sockeye Salmon Run PDF Download
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Author: Robert T. Baer
Publisher:
ISBN:
Category : Fish populations
Languages : en
Pages : 62
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Book Description
This report summarizes the fishery and limnological results from the 2004 to 2006 season and compiles all of the available historical data associated with the Afognak Lake system.
Author: Robert T. Baer
Publisher:
ISBN:
Category : Fish populations
Languages : en
Pages : 62
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Book Description
This report summarizes the fishery and limnological results from the 2004 to 2006 season and compiles all of the available historical data associated with the Afognak Lake system.
Author: Steven G. Honnold
Publisher:
ISBN:
Category : Alaska Maritime National Wildlife Refuge (Alaska)
Languages : en
Pages : 28
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Book Description
Presents data collected in 2004 for a three-year study (2004-2006) assessing smolt abundance, spawning and rearing habitats of sockeye salmon in Afognak Lake.
Author: Robert T. Baer
Publisher:
ISBN:
Category : Afognak Lake (Alaska)
Languages : en
Pages : 54
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Book Description
This report provides the 2008 fishery and limnology results from the Afognak Lake system and fulfills annual reporting requirements to the US Fish and Wildlife Service Office of Subsistence Management, the funding agent for this project (project 07-401).
Author: Robert T. Baer
Publisher:
ISBN:
Category : Afognak Lake (Alaska)
Languages : en
Pages : 52
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Book Description
This report provides the 2007 fishery and limnology results from the Afognak Lake study and fulfills annual reporting requirements to the US Fish and Wildlife Service Office of Subsistence Management, the funding agent for this project (project 07-401).
Author: Robert T. Baer
Publisher:
ISBN:
Category : Afognak Lake (Alaska)
Languages : en
Pages : 62
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Book Description
The Afognak Lake sockeye salmon Oncorhynchus nerka run severely declined in 2001 and has remained low since. Concerns expressed by local subsistence users to the Alaska Department of Fish and Game and the US Fish and Wildlife Service Office of Subsistence Management prompted an investigation of the lake's rearing environment in 2003 followed by subsequent annual studies. This report provides 2009 project results, a summary of results from 2007 and 2008, and an evaluation of limnology conditions and their effects upon smolt production.
Author: Darin Ruhl
Publisher:
ISBN:
Category : Fish populations
Languages : en
Pages : 0
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Book Description
"This operational plan provides the instruction and procedures to properly operate the Afognak Lake adult salmon escapement weir and successfully meet each project objective. The primary function of maintaining a weir at Afognak River is to enumerate sockeye salmon Oncorhynchus nerka returning to Afognak Lake for the Alaska Department of Fish and Game (ADF&G) management of the Afognak Bay commercial, subsistence, and sport fishery. All fish passing upstream or downstream through the weir are identified, enumerated, and reported to the ADF&G office in Kodiak daily. Enumeration at the weir serves a secondary purpose by providing run timing and escapement information for Kodiak Regional Aquaculture Association (KRAA), which uses Afognak Lake sockeye salmon as an early-run brood stock source for various enhancement projects on Kodiak Island. Project activities at Afognak River weir include installation, operation, and maintenance of the weir, salmonid enumeration, record daily physical weather observation, and the collection of age, sex, and length (ASL) samples and corresponding data."--Page 1
Author: Julie Bednarski
Publisher:
ISBN:
Category : Fish populations
Languages : en
Pages : 64
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Book Description
Since 1967 the Alaska Department of Fish and Game, Division of Commercial Fisheries, has operated a stock assessment program to estimate escapements and harvests of Chilkat sockeye salmon (Oncorhynchus nerka). Sockeye salmon were counted through a weir near the outlet of Chilkat Lake, and age, length, and sex data were collected and analyzed each year. Since 1994, mark-recapture studies were conducted to estimate Chilkat sockeye salmon escapements. Since the start of the 2008 season, DIDSON sonar has been used at the weir site to directly enumerate adult sockeye salmon escapement into Chilkat Lake. Visual scale pattern analysis was conducted to determine the proportion of Chilkat sockeye salmon harvested annually in the District 15 commercial drift gillnet fishery. In addition, limnological sampling was conducted in Chilkat Lake and analyzed each year. The intent of this report was to review Chilkat sockeye salmon stock assessment data from 1971 to 2016. The visual and DIDSON weir counts provide an index of escapement; however concerns regarding mark-recapture as a reliable index of abundance lead us to recommend eliminating mark-recapture studies in 2017 and, instead, maintain the DIDSON to estimate escapement into Chilkat Lake. We also recommend reviewing the current Chilkat Lake biological escapement goal to ensure that the goal and escapement estimates are in the same units, which is currently based on mark-recapture units. An average of 77,800 Chilkat Lake sockeye salmon were harvested annually in the District 15 commercial drift gillnet fishery (1976-2016). A comparison of historical fish wheel counts to Chilkat Lake escapement estimates demonstrates that the fish wheel project provides a rough indication of Chilkat Lake run strength. Zooplankton samples from Chilkat Lake were composed primarily of one species of copepod (Cyclops columbianus) and three species of cladocerans (Bosmina longerostris, Daphnia longiremus, and Daphnia rosea).
Author: Nicole L. Zeiser
Publisher:
ISBN:
Category : Escapement (Fisheries)
Languages : en
Pages : 48
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Book Description
The Chilkoot Lake sockeye salmon (Oncorhynchus nerka) run, which spawns near Haines, is one of the largest in Southeast Alaska and contributes substantially to harvests in the District 15 commercial drift gillnet fishery in Lynn Canal. This operational plan outlines objectives, methods, and timelines for conducting sockeye salmon stock assessment designed to (1) estimate annual escapement and harvest, (2) provide information for inseason fishery management, and (3) reconstruct runs and assess stock status. The Chilkoot Lake run is managed for a biological escapement goal of 38,000–86,000 fish, which is enumerated through a standard picket weir located just downstream of the lake outlet. Weir counts of sockeye salmon are compared to weekly escapement targets to determine inseason run strength. Genetic mixed stock analysis of weekly sockeye salmon harvests in the District 15 commercial drift gillnet fishery provides stock composition estimates that also guide inseason management of the fishery. Biological sampling, along with escapement enumeration and stock-specific harvest data, allows for total run reconstruction required for escapement goal review.
Author: Jeff A. Wadle
Publisher:
ISBN:
Category : Fishery resources
Languages : en
Pages : 41
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Book Description
Author: Lorne E. White
Publisher:
ISBN:
Category : Fish populations
Languages : en
Pages : 43
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Book Description
