Download or read book Chilkat Lake Sockeye Salmon Escapement Goal Review written by Sara E. Miller and published by . This book was released on 2018 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: We reviewed the escapement goal for the Chilkat Lake sockeye salmon (Oncorhynchus nerka) run, which is intensely harvested in the District 15 commercial drift gillnet fishery in Lynn Canal, Southeast Alaska. The current biological escapement goal of 70,000 to 150,000 sockeye salmon was established in 2009, based on a spawner-recruit analysis with weir counts converted to mark-recapture units. We fit age-structured state-space spawner-recruit models to updated 1976-2016 data on abundance, harvest, age composition, and coefficients of variation to examine the effect of autocorrelation and fry plants on recruits and to recommend a new biological escapement goal in Dual-frequency Identification Sonar (DIDSON) units. Historical mark-recapture and weir counts were considered indices of escapement, while the DIDSON counts (2008-2016) were considered 'true' counts of escapement. Fishery management reference points as well as optimal yield, optimal recruitment, and overfishing profiles were estimated from the final state-space Ricker model. Estimates derived from the state-space Ricker model suggest that the probability of achieving yields greater than 90% of maximum sustained yield from escapements at the current upper and lower bounds is 62% and 34%, respectively, and an average 65% over the entire escapement goal range. Therefore, we recommend maintaining the current biological escapement goal of 70,000 to 150,000 sockeye salmon counted at the Chilkat Lake weir site with the DIDSON sonar.

Download or read book A Comprehensive Review of Chilkat Lake and River Sockeye Salmon Stock Assessment Studies written by Julie Bednarski and published by . This book was released on 2017 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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).

Download or read book Review of Salmon Escapement Goals in Southeast Alaska 2014 written by Steven C. Heinl and published by . This book was released on 2014 with total page 77 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Speel Lake Sockeye Salmon Stock Status and Escapement Goal Review written by Steven C. Heinl and published by . This book was released on 2014 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Stock Status and Escapement Goals for Chilkat Lake Sockeye Salmon in Southeast Alaska written by Douglas Murrell Eggers and published by . This book was released on 2010 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Review of Salmon Escapement Goals in Southeast Alaska 2020 written by Steven C. Heinl and published by . This book was released on 2021 with total page 93 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Operational Plan written by Nicole L. Zeiser and published by . This book was released on 2020 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Chilkat 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, (2) provide information for inseason fishery management, and (3) reconstruct runs and assess stock status. The Chilkat Lake sockeye salmon run is managed for a biological escapement goal of 70,000–150,000 fish, which is enumerated with a Dual-Frequency Identification Sonar (DIDSON) system operated in conjunction with a standard picket weir located just downstream of the lake outlet. Genetic mixed stock analysis of weekly sockeye salmon harvests in the District 15 commercial drift gillnet fishery provides stock composition estimates that guide inseason management of the fishery (detailed in a separate Chilkoot Lake sockeye salmon operational plan). Biological sampling, along with escapement enumeration and stock-specific harvest data, allows for total run reconstruction required for escapement goal review. This project also supports the collection of basic limnology information at Chilkat Lake.

Download or read book Summary of Pacific Salmon Escapement Goals in Alaska with a Review of Escapements from 2014 to 2022 written by Andrew Roy Munro and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report summarizes statewide Pacific salmon escapement goals in effect in 2022 and documents escapements for all species and stocks with goals from 2014 through 2022. Annual escapements are compared against escapement goals in place at the time to assess outcomes, with summaries by the Division of Commercial Fisheries regions. We list methods used to enumerate escapements and to develop current escapement goals (with brief descriptions) for each monitored stock. For the 2021–2022 Alaska Board of Fisheries meeting cycle, escapement goals were reviewed for the Southeast Region and Prince William Sound Management Area, which had been postponed from the 2020–2021 meeting cycle because of the COVID-19 pandemic. As a result of these reviews, there were 7 escapement goal changes for 2022. In the Southeast Region, 2 escapement goals were updated (1 coho and 1 sockeye salmon), and in Prince William Sound, 4 escapement goals were updated (2 coho and 2 sockeye salmon) and the Copper River Chinook salmon escapement goal was revised from a lower-bound SEG to an SEG with an upper and lower bound. The number of salmon escapement goals in Alaska remained at 264. In 2022, 67% of the escapement goals in Alaska were met or exceeded and 33% of the stocks did not meet minimum escapement goals.

Download or read book Escapement Goal Review for Susitna River Sockeye Salmon 2009 written by Lowell F. Fair and published by . This book was released on 2009 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report is a summary of reviews and recommendations for the Susitna River sockeye salmon escapement goals in Upper Cook Inlet, Alaska.

Download or read book Review of Salmon Escapement Goals in Bristol Bay Alaska 2021 written by Stacy L. Vega and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Alaska Department of Fish and Game interdivisional escapement goal review committee reviewed Pacific salmon Oncorhynchus spp. escapement goals for the major river systems in Bristol Bay. There were 13 escapement goals reviewed in the Bristol Bay management area for this review. The committee evaluated spawner-return data for all Bristol Bay sockeye salmon O. nerka and Chinook salmon O. tshawytscha stocks with escapement goals. For this escapement goal review, the committee recommends that all sockeye salmon escapement goals in the Bristol Bay management area remain the same. After the development of a run reconstruction model recommended at the last cycle, the committee also recommends no change to the Nushagak River Chinook salmon escapement goal for this cycle and that a run reconstruction-based escapement goal be considered during the next Board of Fisheries cycle.

Download or read book Review of Salmon Escapement Goals in Southeast Alaska 2017 written by Steven C. Heinl and published by . This book was released on 2017 with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Alaska Department of Fish and Game interdivisional escapement goal review committee reviewed Pacific salmon Oncorhynchus spp. escapement goals for Southeast Alaska in 2017. As of 2016, 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 changes to escapement goals to the directors of the divisions of Commercial Fisheries and Sport Fish as follows: (1, 2, 3) replace escapement goal ranges for Chickamin, Blossom, and Keta river Chinook salmon, which are expressed in index survey counts, with ranges expressed as total escapement; (4) eliminate the Klukshu (Alsek) River Chinook salmon goal; (5) eliminate the combined East Alsek-Doame river sockeye salmon biological escapement goal (13,000-26,000 fish) and replace it with a sustainable escapement goal (range 9,000-24,000 fish) germane only to the East Alsek River; (6) eliminate the Lost River sockeye salmon goal; (7) eliminate the Alsek River sockeye salmon goal (8); change the Berners River coho salmon biological escapement goal from 4,000-9,200 fish to 3,600-8,100 fish; (9) change the Tsiu-Tsivat river coho salmon goal from a biological escapement goal to a sustainable escapement goal while maintaining the same goal of 10,000-29,000 fish; (10) eliminate the Ford Arm Creek coho salmon goal; (11) eliminate the Situk River pink salmon goal; and (12) change the aggregate Northern Southeast Inside summer-run chum salmon lower bound sustainable escapement goal from 119,000 to 107,000 fish. As a result of these recommendations, a total of 47 Southeast Alaska escapement goals would be established for 11 Chinook, 12 sockeye, 13 coho, 3 pink, and 8 chum salmon stocks.

Download or read book Escapement Goal Review for Kenai River Late run Sockeye Salmon written by John H. Clark and published by . This book was released on 2007 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Review of Salmon Escapement Goals in Upper Cook Inlet Alaska 2019 written by Timothy R. McKinley and published by . This book was released on 2020 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Alaska Department of Fish and Game interdivisional escapement goal review committee reviewed Pacific salmon (Oncorhynchus spp.) escapement goals for the major river systems in Upper Cook Inlet. Escapement goals were reviewed for 21 Chinook salmon, 1 chum salmon, 4 coho salmon, and 9 sockeye salmon stocks. The committee recommended to the Commercial Fisheries and Sport Fish division directors updates to 7 Chinook salmon goals (Deshka River, Alexander Creek, Chulitna River, Chuitna River, Theodore River, Little Susitna River, and Crooked Creek), consolidation of 10 Chinook salmon goals into 3 goals (Eastside Susitna, Talkeetna River, and Yentna River), a discontinuation of 11 Chinook salmon goals (Goose Creek, Little Willow Creek, Montana Creek, Sheep Creek, Willow Creek, Clear [Chunilna] Creek, Prairie Creek, Talachulitna River, Lake Creek, Peters Creek, and Lewis River), updates to 3 coho salmon goals (Fish Creek, Jim Creek, and Little Susitna River), and updates to 3 sockeye salmon goals (Kasilof River, Kenai River, and late-run Russian River).

Download or read book Review of Salmon Escapement Goals in the Kodiak Management Area 2016 written by Kevin L. Schaberg and published by . This book was released on 2016 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: An interdivisional team of staff from the Alaska Department of Fish and Game met 3 times beginning in March 2016 to review existing Pacific salmon Oncorhynchus spp. escapement goals in the Kodiak Management Area (KMA), for the purpose of making recommendations to the directors of the divisions of Commercial Fisheries and Sport Fish. The KMA salmon escapement goals had previously been reviewed in 2013. The review team recommends 18 goals remain unchanged, the elimination of 2 goals (Uganik Lake sockeye salmon O. nerka lower-bound sustainable escapement goal, and Mainland District chum salmon O. keta aggregate lower-bound sustainable escapement goal), and the revision of 4 goals (Ayakulik Chinook salmon O. tshawytscha biological escapement goal range 4,800?8,400, Karluk River early-run sockeye salmon biological escapement goal range 150,000?250,000, Karluk River late-run sockeye salmon biological escapement goal range 200,000?400,000, and Kodiak Archipelago chum salmon aggregate lower-bound sustainable escapement goal 101,000). When combined with existing escapement goals, these staff recommendations to the directors of the divisions of Commercial and Sport Fisheries result in 22 escapement goals for the KMA in 2017: 12 for sockeye salmon, 2 for Chinook salmon, 4 for coho salmon O. kisutch, 3 for pink salmon O. gorbuscha, and 1 for chum salmon.

Download or read book Review of Salmon Escapement Goals in Bristol Bay Alaska 2006 written by Timothy T. Baker and published by . This book was released on 2006 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report contains recommendations after the Alaska Department of Fish and Game Escapement Goal Review Committee reviewed Pacific salmon, Oncorhynchus spp., escapement goals for the major river systems in Bristol Bay. Spawner-return data were evaluated for: sockeye salmon, O. nerka, in the Ugashik, Egegik, Kvichak, Naknek, Alagnak, Wood, Nushagak, Igushik, Togiak, and Kulukak Rivers; chinook salmon, O. tshawytscha, in the Nushagak, Togiak, Alagnak, Naknek, and Egegik Rivers; chum salmon, O. keta, in the Nushagak River; coho salmon, O. kisutch, in the Togiak, Nushagak, and Kulukak Rivers; and pink salmon, O. gorbuscha, in the Nushagak River.

Download or read book Review of Salmon Escapement Goals in Upper Cook Inlet Alaska 2016 written by Jack W. Erickson and published by . This book was released on 2017 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Alaska Department of Fish and Game interdivisional escapement goal review committee reviewed Pacific salmon Oncorhynchus spp. escapement goals for the major river systems in Upper Cook Inlet. Escapement goals were reviewed for 21 Chinook salmon O. tshawytscha, 1 chum salmon O. keta, 4 coho salmon O. kisutch, and 9 sockeye O. nerka salmon stocks. The committee recommended to the Divisions of Commercial Fisheries and Sport Fish directors changes to 2 Chinook salmon goals (early- and late- run Kenai River), 1 chum salmon goal (Clearwater Creek), and 4 sockeye salmon goals (Chelatna, Judd, and Larson lakes and Fish Creek). The committee also recommended creating 1 Chinook salmon (Little Susitna River; weir-based goal) and 1 coho salmon (Deshka River) escapement goal.

Download or read book A Review of Limnology and Fishery Data and a Sockeye Salmon Escapement Goal Evaluation for Saltery Lake on Kodiak Island written by Steven G. Honnold and published by . This book was released on 2001 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: