Download or read book Hugh Smith Lake Sockeye Salmon Stock Assessment 2019 written by Malika T. Brunette and published by . This book was released on 2020 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 2019, long-term population studies designed to evaluate adult sockeye salmon abundance and juvenile production at Hugh Smith Lake continued. An estimated 25,000 sockeye salmon smolt were counted through the smolt weir and an estimated 56% of smolt were freshwater-age-1 and 43% were freshwater-age-2. The escapement was counted through a weir, a mark-recapture study was conducted to confirm the weir count, and biological data were collected to estimate the age, length, and sex composition of the adult sockeye salmon escapement. The 2019 weir count of 2,241 adult sockeye salmon was below the optimal escapement goal range of 8,000-18,000 adult sockeye salmon and was the fourth lowest escapement since 1980. Age-1.3 adults were the most abundant adult age class, representing an estimated 82% of the total spawning population. Sockeye salmon spawn in 2 inlet streams, Buschmann Creek and Cobb Creek. Counts of live sockeye salmon in Buschmann Creek (not including mouth estimates) only exceeded 250 fish during peak spawn timing from 14 to 22 September (peak count 475 fish on 14 September). Counts of live sockeye salmon in Cobb Creek peaked at 56 fish on 15 September and all other counts were less than 25 fish. Reported subsistence harvest was 521 fish and accounted for an estimated 19% of the terminal run. The estimated minimum harvest rate in the District 101-108 commercial net fisheries was 77% in 2019.

Download or read book Hugh Smith Lake Sockeye Salmon Stock Assessment 2021 written by Teresa M. Fish and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 2021, long-term population studies designed to evaluate adult sockeye salmon (Oncorhynchus nerka) abundance and juvenile production at Hugh Smith Lake continued. The smolt weir count of 9,000 sockeye salmon smolt was the lowest count on record. An estimated 75.7% of smolt were freshwater age-1, and 24.3% were freshwater age-2. Escapement was counted through a weir, a mark–recapture study was conducted to confirm the weir count, and biological data were collected to estimate the age, length, and sex composition of adult sockeye salmon returning to Hugh Smith Lake. The 2021 weir count of 3,235 adult sockeye salmon was below the optimal escapement goal range of 8,000–18,000 and was the 7th lowest escapement in the 1980–2021 data series. Age-1.3 fish were the most abundant age class, representing an estimated 73.8% of the total spawning population. Counts of live sockeye salmon in Buschmann Creek (not including mouth estimates) only exceeded 300 fish during 3 of 12 surveys from 20 August to 31 October (including a peak count 510 live fish on 14 September). Counts of live sockeye salmon in Cobb Creek peaked at only 40 fish on 13 September; most other counts were of 10 or less fish. Reported subsistence harvest was 111 fish, which accounted for an estimated 3.3% of the terminal run. The estimated minimum harvest rate in the District 101–108 commercial net fisheries was 79.3% in 2021.

Download or read book Hugh Smith Lake Sockeye Salmon Stock Assessment 2020 written by Teresa M. Fish and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 2020, long-term population studies designed to evaluate adult sockeye salmon (Oncorhynchus nerka) abundance and juvenile production at Hugh Smith Lake continued. The smolt weir count of 16,000 sockeye salmon smolt was tied for the 2nd lowest count on record. An estimated 48% of smolt were freshwater age-1 and 52% were freshwater age-2. The escapement was counted through a weir, a mark–recapture study was conducted to confirm the weir count, and biological data were collected to estimate the age, length, and sex composition of the adult sockeye salmon escapement. The 2020 weir count of 3,860 adult sockeye salmon was below the optimal escapement goal range of 8,000–18,000 adult sockeye salmon and was the 9th lowest escapement since 1980. Age-2.2 fish were the most abundant age class, representing an estimated 40% of the total spawning population. Counts of live sockeye salmon in Buschmann Creek (not including mouth estimates) only exceeded 250 fish during 4 of 18 surveys from 19 August to 7 November (peak count 556 fish on 27 October). Counts of live sockeye salmon in Cobb Creek peaked at only 27 fish on 30 September and all other counts there were less than 20 fish. Reported subsistence harvest was 70 fish and accounted for an estimated 2% of the terminal run. The estimated minimum harvest rate in the District 101–108 commercial net fisheries was 38% in 2020.

Download or read book Hugh Smith Lake Sockeye Salmon Stock Assessment 2017 2018 written by Malika T. Brunette and published by . This book was released on 2019 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 2017 and 2018, long-term population studies designed to evaluate adult sockeye salmon abundance and juvenile production at Hugh Smith Lake continued. An estimated 80,000 sockeye salmon smolt were counted through the smolt weir in 2017, and 63,000 sockeye smolt were counted through the smolt weir in 2018. In 2017, an estimated 88% of smolt were freshwater age-1 and 12% were freshwater age-2. In 2018, an estimated 57% of smolt were freshwater age-1 and 42% were freshwater age-2. Biological data were collected to estimate the age, length, and sex composition of the adult sockeye salmon escapement, the escapement was counted through a weir, and a mark-recapture study was conducted to confirm the weir count. The 2017 weir count of 14,748 adult sockeye salmon fell within the optimal escapement goal range of 8,000-18,000 adult sockeye salmon. Conversely, the 2018 weir count of 2,039 adult sockeye salmon was the third lowest escapement since 1980 and well below goal. Age-1.3 adults were the most abundant adult age class to return in 2017, representing an estimated 78% of the total spawning population. Conversely, age-1.2 adults were the most abundant returning adult age class in 2018, representing an estimated 48% of the total spawning population. Numbers of fish observed spawning in Buschmann and Cobb creeks were extremely low during the normal peak spawn timing in 2018 due to extreme low water flow through most of September. Reported subsistence harvest in 2017 (617 fish) was the third largest harvest on record and the number of permit days fished was the highest on record. Conversely, reported subsistence harvest and participation dropped to very low levels in 2018 due to extremely low abundance. Estimated minimum harvest rates in the District 101-108 commercial net fisheries were 47% in 2017 and 66% in 2018.

Download or read book Sockeye Salmon Stock Status and Escapement Goal for Hugh Smith Lake in Southeast Alaska written by Harold J. Geiger and published by . This book was released on 2003 with total page 71 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Hugh Smith Lake Sockeye Salmon Studies 2014 written by Malika T. Brunette and published by . This book was released on 2015 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report reviews stock assessment and long-term population studies designed to evaluate adult sockeye salmon abundance and juvenile production at Hugh Smith Lake.

Download or read book Hugh Smith Lake Sockeye Salmon Studies 2013 written by Malika T. Brunette and published by . This book was released on 2015 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report reviews stock assessment and long-term population studies designed to evaluate adult sockeye salmon abundance and juvenile production at Hugh Smith Lake.

Download or read book Hugh Smith Lake Sockeye Salmon Adult and Juvenile Studies 2008 written by Andrew W. Piston and published by . This book was released on 2009 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report reviews the stock assessment and rehabilitation efforts of sockeye salmon at Hugh Smith Lake.

Download or read book Hugh Smith Lake Sockeye Salmon Studies 2011 written by Malika T. Brunette and published by . This book was released on 2012 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report reviews stock assessment and long-term population studies designed to evaluate adult sockeye salmon abundance and juvenile production at Hugh Smith Lake.

Download or read book Hugh Smith Lake Sockeye Salmon Studies 2012 written by Malika T. Brunette and published by . This book was released on 2013 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report reviews stock assessment and long-term population studies designed to evaluate adult sockeye salmon abundance and juvenile production at Hugh Smith Lake.

Download or read book Hugh Smith Lake Sockeye Salmon Adult and Juvenile Studies 2009 written by Andrew W. Piston and published by . This book was released on 2010 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report reviews the stock assessment and rehabilitation efforts of sockeye salmon at Hugh Smith Lake.

Download or read book Hugh Smith Lake Sockeye Salmon Studies 2010 written by Malika T. Brunette and published by . This book was released on 2011 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report reviews stock assessment and long-term population studies designed to evaluate adult sockeye salmon abundance and juvenile production at Hugh Smith Lake.

Download or read book Hugh Smith Lake Sockeye Salmon 2016 written by Malika T. Brunette and published by . This book was released on 2017 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 2016, we continued long-term sockeye salmon population studies at Hugh Smith Lake designed to evaluate adult sockeye salmon abundance and juvenile production. An estimated 32,000 sockeye salmon smolt were counted through a smolt weir operated at the outlet of the lake from 20 April to 4 June. We estimated 85% of the smolt were freshwater age-1 and 14% were freshwater age-2. From 17 June to 13 November we enumerated the adult salmon escapement through a weir, conducted an ancillary mark-recapture study to confirm the weir count, and collected biological information to estimate the age, length, and sex composition of the sockeye salmon escapement. The weir count of 12,868 adult sockeye salmon was the 12th escapement in the past 14 years to exceed the lower bound of the optimal escapement goal range of 8,000-18,000 adult sockeye salmon. Age-1.3 adults were the dominant returning age class, representing an estimated 67% of the total spawning population. A count of 1,810 live spawners was observed in Buschmann Creek on 15 September. The reported subsistence harvest (404 fish) was the fifth largest harvest on record. Results from genetic stock identification analysis were used to estimate the contribution of Hugh Smith Lake sockeye salmon to southern Southeast Alaska commercial net fisheries. We estimated 35,600 Hugh Smith Lake fish were harvested in District 101-108 net fisheries in 2016 at an estimated commercial harvest rate of 73%.

Download or read book Stock Assessment Study of Chilkoot Lake Sockeye Salmon 2016 2019 written by Shane R. Ransbury and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: From 2016 to 2019, the Alaska Department of Fish and Game, Division of Commercial Fisheries, continued a stock assessment program that began in 1976 to estimate escapements and harvests of Chilkoot Lake sockeye salmon (Oncorhynchus nerka). Sockeye salmon were counted through a weir near the outlet of Chilkoot Lake, and age, length, and sex data were collected and analyzed each year. Sockeye salmon escapements at the weir were 86,721 fish in 2016, 43,098 fish in 2017, 85,463 fish in 2018, and 140,378 fish in 2019, all of which fell within or exceeded the sustainable escapement goal range of 38,000–86,000 fish. Ocean-age-3 sockeye salmon (ages 1.3 and 2.3 combined) of both sexes were the shortest in length since scale sampling began in 1982. The stock compositions of sockeye salmon harvested annually in the District 15 commercial drift gillnet fishery were estimated through scale pattern analysis (2016) and genetic stock identification (2017–2019). Estimated commercial harvests of Chilkoot Lake sockeye salmon were 119,843 fish in 2016, 1,933 fish in 2017, 33,969 fish in 2018, and 149,586 fish in 2019. Estimated harvest rates (including subsistence and sport harvests) were 59% in 2016, 9% in 2017, 31% in 2018, and 52% in 2019. Estimated fall sockeye salmon fry populations at Chilkoot Lake were 42% above average in 2016, 45% below average in 2017, and at or slightly below average in 2018 and 2019, respectively. Average May–September zooplankton density and biomass at Chilkoot Lake were nearly double the long-term average, and zooplankton density in 2019 and biomass in 2016 were the highest recorded since sampling began in 1987.

Download or read book Southeast Alaska Coho Stock Assessment 2022 2024 written by Justin T. Priest and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This project provides stock assessment information for Southeast Alaska coho salmon (Oncorhynchus kisutch) indicator stocks at Berners River and Hugh Smith Lake. Coho salmon smolt at the Berners River and Hugh Smith Lake are captured, implanted with a coded wire tag (CWT), sampled for age and length, adipose fin clipped, and released unharmed. Concurrent to smolt tagging, a project to collect scales of a known age requires capturing and implanting a CWT into coho salmon fry, later to be recovered as smolt and adults. Returning adult coho salmon are examined for the presence of CWTs, enumerated, and sampled for age, length, and sex. These data are used in combination with estimates of harvest of tagged fish by Alaska Department of Fish and Game port sampling and Mark, Tag and Age Laboratory programs to estimate a variety of parameters for the stocks. These programs, conducted continuously since the 1980s, provide detailed information on long-term population dynamics useful for establishing escapement goals and for managing commercial fisheries that target coho salmon."--Page 1

Download or read book Stock Assessment Study of Chilkat Lake and River Sockeye Salmon 2017 2020 written by Shane R. Ransbury and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: From 2017 to 2020, the Alaska Department of Fish and Game, Division of Commercial Fisheries, conducted stock assessment programs to estimate the escapement and harvest of Chilkat Lake sockeye salmon (Oncorhynchus nerka). Escapement was estimated with a Dual-frequency Identification Sonar (DIDSON) and weir near the outlet of Chilkat Lake, and age, length, and sex data were collected and analyzed each year. Sockeye salmon escapements, based on expanded DIDSON counts, were 88,197 fish in 2017, 108,047 fish in 2018, 136,091 fish in 2019, and 50,746 fish in 2020. Estimated escapements fell within the biological escapement goal range of 70,000–150,000 sockeye salmon in all but one year (2020). A pair of fish wheels were operated on the Chilkat River to provide inseason information on Chilkat sockeye salmon run strength to assist in management of the District 15 commercial drift gillnet fishery. Genetic stock identification was conducted to determine the stock composition of sockeye salmon harvested annually in the District 15 commercial drift gillnet fishery. Estimated commercial harvests of Chilkat Lake sockeye salmon were 5,698 fish in 2017, 19,235 fish in 2018, 40,935 fish in 2019, and 8,776 fish in 2020. Estimated annual harvest rates (not including subsistence or sport harvests) ranged from 6.1% (2017) to 23.1% (2019), and Chilkat Lake sockeye salmon accounted for an estimated 14.3% (2017) to 23.5% (2018) of the annual commercial sockeye salmon harvest in District 15. Zooplankton populations at Chilkat Lake have improved steadily since the late 2000s; historical peaks in the abundance of copepods and cladocerans (particularly Daphnia), the preferred prey of juvenile sockeye salmon, were observed in 2020 and 2019, respectively.

Download or read book Stock Assessment Study of Chilkoot Lake Sockeye Salmon 2020 2021 written by Shelby M. Flemming and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 2020 and 2021, the Alaska Department of Fish and Game, Division of Commercial Fisheries, continued a stock assessment program that began in 1976 to estimate escapements and harvests of Chilkoot Lake sockeye salmon (Oncorhynchus nerka). Sockeye salmon were counted through a weir near the outlet of Chilkoot Lake, and age, length, and sex data were collected and analyzed each year. Sockeye salmon escapements at the weir were 60,218 fish in 2020 and 98,672 fish in 2021, which fell within or exceeded the sustainable escapement goal range of 38,000–86,000 fish. Age-1.2 male sockeye salmon in 2020 were larger than the 1982–2019 average, whereas both male and female fish of other ages fell below this average. Genetic stock identification was conducted to determine the stock composition of sockeye salmon harvested annually in the District 15 commercial drift gillnet fishery. Estimated commercial harvests of Chilkoot Lake sockeye salmon were 24,878 fish in 2020, and 50,219 fish in 2021. Estimated harvest rates (including subsistence and excluding sport harvests) were 32% in 2020 and 35% in 2021, and Chilkoot Lake sockeye salmon accounted for an estimated 50% (2020) and 59% (2021) of the annual commercial sockeye salmon harvest in District 15. The estimated fall sockeye salmon fry population at Chilkoot Lake was 66% below average in 2020 (no surveys were conducted in 2021). Average May–September zooplankton density and biomass at Chilkoot Lake were above average in 2020 and below average in 2021.