Author: Steven C. Heinl
Publisher:
ISBN:
Category : Escapement (Fisheries)
Languages : en
Pages : 49
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Review of the sockeye salmon escapement goal for Speel Lake, a small system located approximately 50 km southeast of Juneau, Alaska, that contributes to commercial drift gillnet fisheries in Southeast Alaska District 11.
Author: Rich Brenner
Publisher:
ISBN:
Category : Escapement (Fisheries)
Languages : en
Pages : 34
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Chilkoot Lake, located in upper Lynn Canal near the city of Haines, supports one of the largest runs of sockeye salmon (Oncorhynchus nerka) in southeast Alaska. This stock is currently managed as a sustainable escapement goal range with a lower bound of 38,000 and an upper bound of 86,000 spawners. Escapement is monitored by the Alaska Department of Fish and Game with a weir on the Chilkoot River, and stock of origin from the District 15 commercial drift gillnet fishery harvest is determined using scale pattern analysis. We used Ricker spawner-recuit models in a Bayesian framework to fit data from brood years 1976-2010. Given significant autocorrelation at lag-1, we chose an autoregressive Ricker model for this assessment. Based on model results, maximum sustainable yield would be achieved with an escapement of approximately 52,900 sockeye salmon (median of spawning abundance at maximum sustained yield), and a range of 45,000-60,000 spawners would result in a greater than 80% probability of achieving at least 90% of maximum sustainable yield. This range of escapements fits within the current escapement goal range and, given considerable uncertainty in parameter estimates, we do not recommend changes to the goal at this time. However, some large escapements since 2012 will provide contrast to the existing data once the resulting recruits can be enumerated; thus, we recommend reassessing this escapement goal prior to the Alaska Board of Fisheries meeting in 2021.
Author: Edward O. Otis
Publisher:
ISBN:
Category : Escapement (Fisheries)
Languages : en
Pages : 0
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The Alaska Department of Fish and Game (ADF&G) interdivisional escapement goal review committee (committee) reviewed 41 escapement goals for Pacific salmon Oncorhynchus spp. stocks in Lower Cook Inlet (LCI). Escapement goals were reviewed based on the Policy for the Management of Sustainable Salmon Fisheries (5 AAC 39.222) and the Policy for Statewide Salmon Escapement Goals (5 AAC 39.223) adopted by the Alaska Board of Fisheries into regulation in 2001. All of the existing goals were adopted in 2017, except for 1 chum salmon O. keta stock (McNeil River, adopted 2007) and 2 sockeye salmon O. nerka stocks (Bear and English Bay Lakes, adopted 2001). Except for 2 Chinook salmon O. tshawytscha stocks (Anchor and Ninilchik Rivers) and 4 sockeye salmon stocks (English Bay, Bear, Mikfik, and Chenik Lakes), salmon escapements in LCI are primarily monitored by single or multiple aerial and/or foot surveys of appropriate stream reaches. The resulting escapement indices do not provide absolute abundance estimates suitable for estimating biological escapement goals (BEG). Consequently, all LCI goals are sustainable escapement goals (SEG). There are no escapement goals for coho salmon O. kisutch in LCI. To improve management flexibility and consistency between management areas in Alaska, the committee supported LCI transitioning from stock-specific SEGs for pink (O. gorbuscha, 18 stocks) and chum (12 stocks) salmon to aggregate escapement goals for each of the 3 LCI districts with commercial fisheries targeting these species (Southern, Outer, and Kamishak). ADF&G will continue managing LCI Chinook (3 stocks) and sockeye (8 stocks) salmon using stock-specific SEGs, with 2 Chinook (Anchor and Ninilchik Rivers) and 2 sockeye salmon (Bear and English Bay Lakes) goals changing during this review period.
Author: Steven C. Heinl
Publisher:
ISBN:
Category : Escapement (Fisheries)
Languages : en
Pages : 93
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The Alaska Department of Fish and Game interdivisional escapement goal review committee reviewed Pacific salmon Oncorhynchus spp. escapement goals for Southeast Alaska in August of 2019 and again early in 2020. Escapement goals were reviewed based on the Policy for the Management of Sustainable Salmon Fisheries (5 AAC 39.222) and the Policy for Statewide Escapement Goals (5 AAC 39.223) adopted by the Alaska Board of Fisheries into regulation in 2001. There is a total of 47 escapement goals in Southeast Alaska for 11 Chinook, 12 sockeye, 13 coho, 3 pink, and 8 chum salmon stocks. The Southeast escapement goal review committee recommended changes to these goals to the directors of the Divisions of Commercial Fisheries and Sport Fish as follows: (1) change the Taku River sockeye salmon sustainable escapement goal range of 71,000–80,000 fish (based on a historical dataset) to a biological escapement goal range of 40,000–75,000 fish based on a revised dataset; and (2) change the Situk River coho salmon biological escapement goal range of 3,300–9,800 fish to a sustainable escapement goal range of 3,800–9,600 fish based on percentiles of historical survey counts. Detailed analyses of Chilkoot, Speel, and Redoubt Lakes sockeye salmon escapement goals are also documented here, although the committee did not recommend changes to those goals.
Author: Steven C. Heinl
Publisher:
ISBN:
Category : Escapement (Fisheries)
Languages : en
Pages : 77
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The Alaska Department of Fish and Game interdivisional escapement goal review committee reviewed Pacific salmon Oncorhynchus spp. escapement goals for Southeast Alaska in 2014. As specified in the Pacific Salmon Treaty, escapement goal recommendations for transboundary Alsek and Klukshu river Chinook and sockeye salmon runs underwent bilateral U.S./Canada review, and recommended changes were adopted by the Transboundary River Panel of the Pacific Salmon Commission in 2013. Thus, as of 2013, escapement goals were established for 12 Chinook, 14 sockeye, 14 coho, 4 pink, and 8 chum salmon stocks. The Southeast escapement goal review committee recommended to the directors of the divisions of Commercial Fisheries and Sport Fish that all but 5 of those escapement goals remain unchanged. The committee recommended (1) changing the Speel Lake sockeye salmon goal from a biological escapement goal range of 4,00-13,000 fish to a sustainable escapement goal range of 4,000-9,000 fish; (2) changing the Lost River coho salmon goal from a lower-bound sustainable escapement goal of 2,200 fish to a sustainable escapement goal range of 1,400-4,200 fish, and changing the name of the goal to Tawah Creek (Lost River); (3-4) increasing aggregate lower-bound sustainable escapement goals for summer-run chum salmon in the Southern Southeast and Northern Southeast Outside subregions to account for the addition of new index streams to those stock groups; and, finally, (5) changing the Chilkat River fall-run chum salmon sustainable escapement goal range of 75,000-170,000 fish to a range of 75,000-250,000 fish.
Author: Douglas Murrell Eggers
Publisher:
ISBN:
Category : Escapement (Fisheries)
Languages : en
Pages : 46
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This work represents a review of escapement goals for sockeye salmon stocks (Oncorhynchus nerka) in the Southeast Alaska and Yakutat area.
Author: Edward O. Otis
Publisher:
ISBN:
Category : Escapement (Fisheries)
Languages : en
Pages : 77
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The Alaska Department of Fish and Game (ADF&G) interdivisional escapement goal review committee (committee) reviewed Pacific salmon Oncorhynchus spp. escapement goals for major river systems in Lower Cook Inlet (LCI). There were 41 escapement goals evaluated in LCI during this review. Except for 2 Chinook salmon Oncorhynchus tshawytscha stocks (Anchor and Ninilchik rivers) and 4 sockeye salmon O. nerka, stocks (English Bay, Bear, Mikfik, and Chenik lakes), salmon escapements in LCI are primarily monitored by single or multiple aerial and/or foot surveys of appropriate stream reaches. The resulting escapement indices do not provide absolute abundance estimates suitable for estimating biological escapement goals (BEG). Consequently, ADF&G developed sustainable escapement goals (SEG) for 3 Chinook, 12 chum O. keta, 18 pink O. gorbuscha, and 8 sockeye salmon stocks monitored in LCI. There are no escapement goals for coho salmon O. kisutch in LCI. Escapement performance for Chinook, chum, pink, and sockeye salmon relative to the existing goals has been good during the past 4 years, with a harvestable surplus available in 33--100% of streams during most years. Because most of the current goals were implemented 15 years ago and new methods were recently developed for establishing SEGs, the committee recommended changing 37 of 41 escapement goals for salmon stocks in LCI to incorporate the additional escapement data and new methods.
Author: Harold J. Geiger
Publisher:
ISBN:
Category : Escapement (Fisheries)
Languages : en
Pages : 29
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Author: Philip John Joy
Publisher:
ISBN:
Category : Escapement (Fisheries)
Languages : en
Pages : 48
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This report is a summary of escapement goal recommendations for major salmon stocks of the Upper Copper River and Prince William Sound Management Areas. Escapement goals were reviewed based on the Policy for the Management of Sustainable Salmon Fisheries (5 AAC 39.222) and the Policy for Statewide Salmon Escapement Goals (5 AAC 39.223) adopted by the Alaska Board of Fisheries into regulation in 2001. The escapement goal committee reviewed 29 existing escapement goals, including 1 Chinook Oncorhynchus tshawytscha, 5 chum O. keta, 2 coho O. kisutch, 16 pink O. gorbuscha (8 goals for each even- and odd-year brood line), and 5 sockeye O. nerka salmon stocks. The escapement goal committee recommends escapement goals be updated for 5 stocks: Copper River Chinook salmon, Copper River Delta and Bering River coho salmon, and Bering River and Coghill Lake sockeye salmon. The escapement goal committee recommends that no modifications be made to the other existing salmon escapement goals and that no goals be eliminated or created at this time.
Author: Douglas Murrell Eggers
Publisher:
ISBN:
Category : Escapement (Fisheries)
Languages : en
Pages : 21
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