Coastal Migration Characteristics and Spawning Distribution of Chum and Coho Salmon in Eastern Norton Sound Fisheries PDF Download
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Author: Luke Henslee
Publisher:
ISBN:
Category : Chum salmon
Languages : en
Pages : 32
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Book Description
Historical research and local knowledge suggest that salmon vulnerable to harvest by fisheries in Subdistricts 5 and 6 of the Norton Sound management area represent a mixed stock, with unique populations migrating through marine waters and into spawning streams throughout the area and beyond. Incomplete understanding of salmon harvest composition and migration characteristics in Norton Sound has constrained managers’ ability to direct stock-specific persecution of fisheries. Consequently, fisheries in Subdistricts 5 and 6 are managed as a single unit and salmon are assigned to stocks based on the subdistrict in which they were harvested. This strategy has raised concern among local stakeholders that proportional harvest rates are being obscured and salmon caught in Subdistricts 5 and 6 could be bound for spawning streams in other subdistricts in the Norton Sound area. This project will use acoustic telemetry to address the critical management assumption that chum and coho stocks vulnerable to harvest in Subdistricts 5 and 6 are bound for spawning streams within those subdistricts and should be managed concurrently. This project will attempt to mimic the timing and location of nearshore salmon fisheries in Subdistricts 5 and 6 to tag chum and coho salmon such that the tagged fish are reasonably representative of the available mixed stocks. Sequential acoustic detection of tagged salmon by coastal marine and inriver hydrophone receivers will be used to estimate the spawning distribution of mixed stocks and describe spatiotemporal characteristics of nearshore migration. Results of this project are intended to inform management decisions by clarifying salmon stocks available for harvest in subdistricts 5 and 6 and stock-specific migration characteristics through those subdistricts so that stocks with harvestable surpluses can be targeted while minimizing impacts to less productive stocks.
Author: Luke Henslee
Publisher:
ISBN:
Category : Chum salmon
Languages : en
Pages : 32
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Book Description
Historical research and local knowledge suggest that salmon vulnerable to harvest by fisheries in Subdistricts 5 and 6 of the Norton Sound management area represent a mixed stock, with unique populations migrating through marine waters and into spawning streams throughout the area and beyond. Incomplete understanding of salmon harvest composition and migration characteristics in Norton Sound has constrained managers’ ability to direct stock-specific persecution of fisheries. Consequently, fisheries in Subdistricts 5 and 6 are managed as a single unit and salmon are assigned to stocks based on the subdistrict in which they were harvested. This strategy has raised concern among local stakeholders that proportional harvest rates are being obscured and salmon caught in Subdistricts 5 and 6 could be bound for spawning streams in other subdistricts in the Norton Sound area. This project will use acoustic telemetry to address the critical management assumption that chum and coho stocks vulnerable to harvest in Subdistricts 5 and 6 are bound for spawning streams within those subdistricts and should be managed concurrently. This project will attempt to mimic the timing and location of nearshore salmon fisheries in Subdistricts 5 and 6 to tag chum and coho salmon such that the tagged fish are reasonably representative of the available mixed stocks. Sequential acoustic detection of tagged salmon by coastal marine and inriver hydrophone receivers will be used to estimate the spawning distribution of mixed stocks and describe spatiotemporal characteristics of nearshore migration. Results of this project are intended to inform management decisions by clarifying salmon stocks available for harvest in subdistricts 5 and 6 and stock-specific migration characteristics through those subdistricts so that stocks with harvestable surpluses can be targeted while minimizing impacts to less productive stocks.
Author: Gary L. Todd
Publisher:
ISBN:
Category : Biotelemetry
Languages : en
Pages : 38
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Book Description
Author: United States. Minerals Management Service. Alaska OCS Region
Publisher:
ISBN:
Category : Continental shelf
Languages : en
Pages : 730
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Author: Donald Wilbur Hood
Publisher:
ISBN:
Category : Marine resources
Languages : en
Pages : 648
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Author:
Publisher:
ISBN:
Category : Power resources
Languages : en
Pages : 1226
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Author: Richard G. Bakkala
Publisher:
ISBN:
Category : Chum salmon
Languages : en
Pages : 100
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Author: Peter Mallon Cleary
Publisher:
ISBN:
Category : Chum salmon
Languages : en
Pages : 48
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Book Description
In 2009, the Alaska Department of Fish and Game began a 4-year spawning distribution and abundance estimation study in response to concerns over the status of the Susitna River chum (Oncorhynchus keta) and coho (O. kisutch) salmon stocks. This report summarizes results of mark-recapture abundance and distribution assessments completed during 2012. Four fish wheels were used at river mile (RM) 22 in the Susitna River to capture and tag chum and coho salmon with dart tags in July and August 2012. Two fish wheels were used at RM 6 in the Yentna River and 2 fish wheels were used at RM 34 in the mainstem Susitna River to sample salmon for tags. Estimated spawning abundance of chum salmon was 229,903 (SE 155,193) fish for the mainstem Susitna River and 99,442 (SE 84,876) fish for the Yentna River. Estimated spawning abundance of coho salmon was 90,397 (SE 36,701) fish for the mainstem Susitna River and 93,919 (SE 10,688) fish for the Yentna River. A total of 799 radio tags were placed in chum and coho salmon. Their movements were tracked using 10 ground tracking stations, 15 aerial surveys of the mainstem Susitna River, 6 aerial surveys of the Yentna River, and 2 drainagewide aerial surveys. All but 50 of the radio tags were relocated, and 716 (89.6%) were assigned a putative spawning location. Both chum and coho salmon exhibited bank orientation at the tagging site.
Author: Peter Mallon Cleary
Publisher:
ISBN:
Category : Chum salmon
Languages : en
Pages : 52
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Book Description
In 2009, the Alaska Department of Fish and Game began a 4-year spawning distribution and abundance estimation study in response to concerns over the status of the Susitna River chum (Oncorhynchus keta) and coho (O. kisutch) salmon stocks. This report summarizes results of mark-recapture abundance and distribution assessments completed during 2011. Four fish wheels were used to capture and tag chum and coho salmon with dart tags at river mile (RM) 22 in the Susitna River in July and August 2011. Two fish wheels were used at RM 7 in the Yentna River and 2 fish wheels were used at RM 34 in the mainstem Susitna River to sample salmon for tags. Estimated abundance of chum salmon was 1,473,969 (SE 123,933) fish for the mainstem Susitna River and 278,063 (SE 42,780) fish for the Yentna River. Estimated abundance of coho salmon was 131,878 (SE 24,146) fish for the mainstem Susitna River and 84,677 (SE 9,981) fish for the Yentna River. A total of 734 radio tags were placed in chum and coho salmon. Their movements were tracked using 6 ground tracking stations, 7 aerial surveys of the mainstem Susitna River, 6 aerial surveys of the Yentna River, and 3 drainagewide aerial surveys. All but 31 of the radio tags were relocated and 635 (86.5%) were assigned a putative spawning location. Both chum and coho salmon exhibited bank orientation at the tagging site.
Author: Richard A. J. Merizon
Publisher:
ISBN:
Category : Chum salmon
Languages : en
Pages : 34
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Book Description
Results of the first year of a 4-year spawning distribution study of the lower Susitna River chum Oncorhynchus keta and coho O. kisutch salmon stocks, in which four fish wheels were used to capture and radio-tag chum and coho salmon from July through August 2009.
Author: Donald Wilbur Hood
Publisher:
ISBN:
Category : Marine resources
Languages : en
Pages : 650
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Book Description
