Download or read book Estimation of Sockeye Salmon Escapement Into McLees Lake Unalaska Island Alaska 2008 written by Derek R. Hildreth and published by . This book was released on 2009 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sockeye salmon were counted with the use of a picket weir from June 3 to July 20, 2008 at the outlet of McLees Lake on Unalaska Island.
Download or read book Estimation of Sockeye Salmon Escapement Into McLees Lake Unalaska Island Alaska 2007 written by Jeffry L. Anderson and published by . This book was released on 2008 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sockeye salmon were counted with the use of a picket weir from June 1 to July 27, 2007 at the outlet of McLees Lake on Unalaska Island.
Download or read book Estimation of Sockeye Salmon Escapement Into McLees Lake Unalaska Island Alaska 2006 written by Michael R. Edwards and published by . This book was released on 2006 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sockeye and pink salmon were counted with the use of a picket weir from May 30 to July 28, 2006 at the outlet of McLees Lake on Unalaska Island.
Download or read book Estimation of Sockeye Salmon Escapement Into McLees Lake Unalaska Island Alaska 2005 written by Michael R. Edwards and published by . This book was released on 2005 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Estimation of the Sockeye Salmon Escapement Into McLees Lake Unalaska Island Alaska 2002 written by Douglas E. Palmer and published by . This book was released on 2003 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Estimation of Sockeye Salmon Escapement Into McLees Lake Unalaska Island 2004 written by Michael R. Edwards and published by . This book was released on 2005 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: A picket weir was operated from June 1 to July 26 McLees Lake on the north side of Unalaska Island to enumerate daily passage, describe run-timing, estimate sex and age composition, and estimate mean length.
Download or read book Estimation of the Sockeye Salmon Escapement Into McLees Lake Unalaska Island Alaska 2001 written by Douglas E. Palmer and published by . This book was released on 2002 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Estimation of the Sockeye Salmon Escapement Into McLees Lake Unalaska Island 2003 written by Kenneth S. Gates and published by . This book was released on 2004 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book McLees Lake Salmon Escapement Monitoring Report 2012 2017 written by Colton G. Lipka and published by . This book was released on 2017 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: A fish counting weir was installed and operated in the McLees Lake outlet during June and July of 2012-2017 by the Alaska Department of Fish and Game (ADF&G) to enumerate sockeye salmon Oncorhynchus nerka escapement into McLees Lake. Escapement was enumerated through a picket weir daily from early June through late July. The total sockeye salmon escapement through the McLees Lake weir in 2012 was 15,111 fish, in 2013 was 15,688 fish, in 2014 was 12,424 fish, in 2015 was 20,248 fish, in 2016 was 39,892 fish, and in 2017 was 13,195 fish. In 2012, personnel issues delayed the installation of the weir until July 10. By this time, a large portion of the escapement had already entered McLees Lake and the missed escapement was interpolated. Sockeye salmon escapement met the lower end of the goal by July 1 in 2013, 2014, 2015, and 2016, so emergency orders were issued by department staff to reduce waters closed to subsistence salmon fishing to the outlet stream terminus of McLees Lake. In 2017 sockeye salmon escapement had not met the lower end of the escapement goal by July 1. Subsequently, the department issued emergency orders extending the regulatory closed waters within 500 yards of the stream outlet terminus with the ocean shoreline to subsistence fishing until July 22. Sockeye salmon subsistence harvest in the Reese Bay (Wislow Island) area near McLees Lake ranged from 48% to 89% of all Unalaska Island sockeye salmon subsistent harvest from 2012-2016. Subsistence harvest data from 2017 is still being received and was not finalized by the time of this report. Sampling for zooplankton was conducted at one station in each year to assess freshwater rearing conditions.
Download or read book Estimating Escapement of Western Alaskan Sockeye Salmon for Western Alaska Salmon Stock Identification Program Reporting Groups 2006 to 2008 written by Douglas Murrell Eggers and published by . This book was released on 2012 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Western Alaska Salmon Stock Identification Program (WASSIP) was initiated in 2006 with a memorandum of understanding executed by an Advisory Panel of 11 signatories, including Alaska Department of Fish and Game, and stakeholders from throughout western Alaska. The purpose of WASSIP was to identify stock contributions of sockeye (Oncorhynchus nerka) and chum salmon (O. keta) to commercial and subsistence fisheries from Chignik northward to Kotzebue Sound, and to extend those estimates to stock-specific harvest rates. This report describes the regional fishery model and estimation of escapement and harvest rates for sockeye salmon. Escapements and associated uncertainties were estimated for each of the WASSIP sockeye salmon regional reporting groups (Chignik, South Peninsula, North Peninsula, Bristol Bay, Kuskokwim Bay), and subregional reporting groups (i.e., stocks). The 2006 to 2008 escapement estimates were based on information available in annual area management reports, other monitoring and assessment reports, and department databases.
Download or read book Hetta Lake Subsistence Sockeye Salmon Project written by Jan Marie Conitz and published by . This book was released on 2010 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discusses the results of the 2008 subsistence harvest survey and sockeye salmon escapement count of Hetta Lake on Prince of Wales Island. Lake temperature, light profiles, and zooplankton populations were also measured, and hydroacoustic and trawl surveys were also conducted to estimate small fish populations in the lake.
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 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 Stock Assessment of Sockeye Salmon in the Buskin River 2014 2017 written by Mark J. Witteveen and published by . This book was released on 2018 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Alaska Department of Fish and Game, Division of Sport Fish, has assessed the annual run of Buskin River sockeye salmon (Oncorhynchus nerka) on Kodiak Island, Alaska since 1990. Buskin River sockeye salmon weir counts were 13,976; 8,718; 11,297; and 7,219 fish for 2014-2017, respectively. Weir counts for Lake Louise were 925, 280, 156, and 141 sockeye salmon for 2014-2017, respectively. Reported annual subsistence harvests for the Buskin River Section were 5,616; 3,920; and 4,767 sockeye salmon for 2014-2016, respectively; harvest is not available for 2017 at this time. Mixed stock analysis of genetic samples from the Buskin River sockeye salmon subsistence fishery showed 91-97% of the 2014-2017 harvests were of Buskin Lake origin sockeye salmon and 0.5-4.1% were of sockeye salmon bound for Lake Louise. In interviews conducted from 2014 through 2017, an average of 89% of subsistence users reported each year that the Buskin River was a traditional fishing location, and an average of 79% reported each year that they subsistence fished in other areas. Enumerated sockeye salmon spawning escapement for the entire drainage was 14,901; 8,998; 11,453; and 7,360 fish for 2014-2017, respectively. Based on a Bayesian spawner-recruitment analysis, estimated spawning escapement for maximum sustained yield is about 6,500 fish (95% credibility interval 5,100-8,400). A sustained yield probability analysis supports the current Buskin Lake system biological escapement goal (BEG) range of 5,000-8,000 sockeye salmon. Age-1.3, -2.2, and -2.3 sockeye salmon composed 90-99% of the subsistence harvests for 2014-2017 and composed 76-96% of the Buskin River and 50-100% of the Lake Louise escapements. Male to female ratios for the Buskin River were between 0.7 and 1.1 to 1 for 2014-2017; they were 1.3-2.5 to 1 for Lake Louise, and 0.8-1.5 to 1 for the subsistence harvest.
Download or read book Alaska Peninsula Salmon Enumeration and Escapement Sampling Procedures 2023 2025 written by William S. Middleton and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the Alaska Peninsula Management Area (Area M), weirs are a primary mode of enumeration for sockeye salmon Oncorhynchus nerka escapements into some area streams. Annually, the Alaska Department of Fish and Game (ADF&G) samples adult sockeye salmon escapements at the Nelson, Bear, Sandy, Ilnik, and Orzinski rivers, and McLees Lake for age, sex, and length (ASL) data. Out-migrating juvenile sockeye salmon (smolt) are also sampled for age, weight, and length (AWL) at Nelson, Bear, and Orzinski river weirs. The biological information collected from salmon escapements provide the foundation for preseason run forecasts, escapement goal evaluation, and accurate assignment of the run to stock-of-origin (run reconstruction) to some Alaska Peninsula systems. The use of this data assists with long-term management of sockeye salmon stocks while daily monitoring of the sockeye salmon escapements helps ensure that escapement goals are met. Operation guidelines for the six Area M ADF&G weir camps are presented, including weir installation instructions, salmon enumeration and sampling procedures, and general camp policies.
Download or read book Estimation of Sockeye Salmon Escapement in Mortensens Creek Izembek National Wildlife Refuge 2006 and 2001 to 2006 Run Comparisons written by Jeffry L. Anderson and published by . This book was released on 2007 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stock Assessment of Sockeye Salmon in the Buskin River 2018 2021 written by Mark J. Witteveen 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, Division of Sport Fish, has assessed the annual run of Buskin River sockeye salmon (Oncorhynchus nerka) on Kodiak Island, Alaska, since 1990. Buskin River sockeye salmon weir counts were 4,284, 12,297, 7,741, and 2,330 fish for 2018–2021, respectively. Weir counts for Lake Louise were 83, 73, 53, and 1,896 sockeye salmon for 2018–2021, respectively. Reported annual subsistence harvests for the Buskin River Section were 474, 836, and 1,620 sockeye salmon for 2018–2020, respectively; accurate harvest is not available for 2021 at this time. In interviews conducted with 11 subsistence users in 2019, 100% reported that the Buskin River was a traditional fishing location, and 73% reported that they subsistence fished in other areas. Interviews were not conducted in 2018 due to a low run or in 2020 and 2021 due to COVID-19. Enumerated sockeye salmon spawning escapement for the entire drainage (Buskin Lake and Louise Lake weirs) was 4,367, 12,370, 7,794, and 4,226 fish for 2018–2021, respectively. Based on a Bayesian spawner–recruitment analysis of the Buskin Lake system, estimated spawning escapement for maximum sustained yield is about 5,700 fish (95% credibility interval = 4,300–8,000). A sustained yield probability analysis supports the current Buskin Lake system biological escapement goal (BEG) range of 5,000–8,000 sockeye salmon. Age-1.2, -1.3, -2.2, and -2.3 sockeye salmon composed 93–99% of the Buskin River run. Male to female ratios for the Buskin River were between 0.6 and 1.1 to 1 for 2018–2021. Samples taken from the Lake Louise sockeye salmon run and the subsistence harvest were too low to provide reliable estimates of age and sex composition.
