Download or read book A Bottom Trawl Survey for Tanner Crab in Kachemak Bay 2017 written by Wyatt J. Rhea-Fournier and published by . This book was released on 2020 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: A bottom trawl survey was conducted from August 29 to September 6, 2017, to estimate density and infer abundance of Tanner crab Chionoecetes bairdi in Kachemak Bay within the Southern District of the Cook Inlet Area. The survey was conducted aboard ADF&G's research vessel Pandalus using a 400-mesh Eastern otter trawl (large-mesh trawl). The survey caught 1,481 male Tanner crab of which 137 (9%) were of legal size (114 mm carapace width or greater) to produce a mean CPUE of 10.13 crab/nmi (CV = 0.52) and yielded an abundance estimate of 124,965 legal crab. Legal male Tanner crab were caught at 11 of the 38 stations with 90% of the total legal males caught at only 5 stations. The survey caught 1,350 female Tanner crab of which 348 (26%) were mature to produce a mean CPUE of 24.08 crab/nmi (CV = 0.50) and yielded an abundance estimate of 297,126 mature crab. Abundance estimates of legal male and mature female Tanner crab were well below the long-term average of the survey time series.

Download or read book A Bottom Trawl Survey for Tanner Crab in Kachemak Bay 2018 and 2019 written by Wyatt J. Rhea-Fournier and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A bottom trawl survey was conducted in 2018 and 2019 to estimate density and infer abundance of Tanner crab Chionoecetes bairdi in Kachemak Bay. The survey was conducted aboard the Alaska Department of Fish and Game (ADF&G) research vessel Pandalus using a 400-mesh Eastern otter trawl (large-mesh trawl). In 2018, the survey caught 12,568 male Tanner crab of which 348 were of legal size, ≥114mm (4.5 in), to produce a mean catch per unit effort (CPUE) of 18.06 legal-size crab/nmi and yielded an abundance estimate of 222,852 legal-size crab. In 2019, the survey caught 1,682 male Tanner crab of which 421 were of legal size to produce a mean CPUE of 22.17 legal-size crab/nmi and yielded an abundance estimate of 273,511 legal-size crab. The 2017, 2018, and 2019 survey results produced a 3-year mean of 207,109 legal-size male crab which allowed the standard noncommercial fisheries to occur for the 2019–2020 season. In 2018, the survey caught 4,193 female Tanner crab of which 1,566 were mature to produce a mean CPUE of 82.25 mature female crab/nmi and yielded an abundance estimate of 1,014,869 mature female crab. In 2019, the survey caught 2,660 female Tanner crab of which 2,295 were mature to produce a mean CPUE of 120.66 mature female crab/nmi and yielded an abundance estimate of 1,488,880 mature female crab. Abundance estimates of legal-size male Tanner crab were slightly above the long-term mean, and mature female Tanner crab were substantially above the long-term mean of the survey time series.

Download or read book A Bottom Trawl Survey for Tanner Crab in Prince William Sound 2020 written by Wyatt J. Rhea-Fournier and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A large-mesh bottom trawl survey of Tanner crab Chionoecetes bairdi was conducted in 2020 in the Prince William Sound Area (PWSA; Registration Area E) with the objective of establishing protocols for generating Tanner crab abundance estimates for a newly established survey area. New survey areas in PWSA were developed to assess new commercial fishery districts that were proposed at the 2021 Alaska Board of Fisheries meeting. Proposed fishery districts encompass historical fishing areas and areas fished in the recent commissioner’s permit fishery. Methodology from the historical PWSA trawl survey was applied to develop new trawl stations with the goal of calculating catch per unit effort (CPUE) to estimate abundance of historical legal size and legal-size male Tanner crab in the surveyed area. The 2020 survey produced a CPUE for male Tanner crab that were of the historical legal size of 28.4 crab per nmi2, which was the third lowest observation for any Alaska Department of Fish and Game trawl survey in the PWSA. The estimated abundance of historical legal-size male Tanner crab was 8,214 crab in the survey area, and the estimated abundance for legal-size male Tanner crab was 35,920 crab in the survey area.

Download or read book A Bottom Trawl Survey for Tanner Crab in Prince William Sound 2021 written by Wyatt J. Rhea-Fournier and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A large-mesh bottom trawl survey of Tanner crab Chionoecetes bairdi was conducted in 2021 in the Prince William Sound Area (PWSA; Registration Area E) with the objective of establishing protocols for generating Tanner crab abundance estimates for a newly established survey area. New survey areas in PWSA were developed to assess new commercial fishery districts that were proposed at the 2021 Alaska Board of Fisheries meeting. Proposed fishery districts encompass historical fishing areas and areas fished in the recent Commissioner's permit fishery. Methodology from the historical PWSA trawl survey was applied to develop new trawl stations with the goal of calculating catch per unit effort (CPUE) to estimate abundance of historical legal-size and legal-size male Tanner crab in the surveyed area. The 2021 survey produced a CPUE for male Tanner crab that were of the historical legal size of 11.6 crab per nmi2 and was the lowest observation for any Alaska Department of Fish and Game trawl survey in the PWSA. The estimated abundance of historical legal-size male Tanner crab was 6,242 crab in the survey area, and the estimated abundance for current legal-size male Tanner crab was 40,289 crab in the survey area.

Download or read book Bottom Trawl Surveys for Tanner Crab in Lower Cook Inlet and Prince William Sound 1990 2015 with Harvest Strategy Recommendations for Prince William Sound written by Kenneth James Goldman and published by . This book was released on 2018 with total page 93 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report summarizes bottom trawl survey data used to assess Tanner crab Chionoecetes bairdi abundance within the Alaska Department of Fish and Game's Central Region. Trawl surveys replaced pot surveys as the primary method of assessing Tanner crab in Central Region in the early 1990s. Data for the Central Region were collected from 2 management districts in the Lower Cook Inlet Management Area: 1) the Southern District (1990-2013), and 2) the Kamishak Bay and Barren Islands Districts (1990-2012). Data were also collected from the Prince William Sound Management Area (1991-2015). Since 1993 in the Southern District, and 1990 in the Kamishak Bay and Barren Islands Districts, the estimated abundance of legal male Tanner crab has not exceeded the minimum stock size threshold defined in regulation that is necessary to open a commercial fishery (Alaska Administrative Code 5 AAC 35.408). Bottom trawl survey methods have changed through the history of the survey and those changes are documented in this report. Abundance trends of legal and sublegal male and female Tanner crab are also described along with trends in recruitment. Analysis and harvest strategy recommendations to create a management plan for commercial and noncommercial Tanner crab fisheries in the Prince William Sound Management Area are presented.

Download or read book Operational Plan written by Wyatt J. Rhea-Fournier and published by . This book was released on 2020 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary objective of the 2020 Tanner crab, Chionoecetes bairdi, large-mesh bottom trawl survey is to develop a new survey area in the inside waters of Prince William Sound. Methodology from the historical trawl survey will be applied to develop new trawl stations with the goal of generating abundance estimates for the surveyed area. Abundance estimates will be generated for current and historical legal-size male Tanner crab for management purposes. Male Tanner crab biological measurements will be collected for estimating size at morphological maturity and mature male crab will be tagged for observing season movement.

Download or read book Operational Plan Bottom Trawl Survey for Tanner Crab in Prince William Sound 2021 written by Wyatt J. Rhea-Fournier and published by . This book was released on 2021 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary objective of the 2021 Tanner crab, Chionoecetes bairdi, large-mesh bottom trawl survey is to develop a new survey area in the outside, southwest waters of Prince William Sound. Methodology from the historical trawl survey will be applied to develop new trawl stations with the goal of generating abundance estimates for the surveyed area. Abundance estimates will be generated for current and historical legal-size male Tanner crab for management purposes. Male Tanner crab biological measurements will be collected for estimating size at morphological maturity and mature male crab will be tagged for observing season movement.

Download or read book A Bottom Trawl Survey for Crabs and Groundfish in the Prince William Sound Management Area 16 26 August 1997 written by William R. Bechtol and published by . This book was released on 1999 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt: Survey objectives were: estimate the abundance of Tanner crab (Chionoecetes bairdi) in the Prince William Sound Management Area; document size and shell age for crabs captured; determine the clutch fullness and egg condition of the female crabs caught; record size and number of groundfish by-catch.

Download or read book A Bottom Trawl Survey for Crabs in the Prince William Sound Management Area August 3 13 1992 written by Charles E. Trowbridge and published by . This book was released on 1992 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: Survey objectives were: determine Tanner crab (Chionoecetes bairdi) stock abundance in the Prince William Sound Management Area; document size and shell age for crabs caught in the region; determine corresponding egg condition of the females caught; record size and number of Pacific cod and other groundfish species in the region.

Download or read book A Bottom Trawl Survey for Crabs in the Prince William Sound Management Area August 20 30 1991 written by Al Kimker and published by . This book was released on 1992 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Survey objectives were: determine Tanner crab (Chionoecetes bairdi) stock abundance in the Prince William Sound Management Area; document size and shell age for crabs caught in the region; determine corresponding egg condition of the females caught; record size and number of Pacific cod and other groundfish species in the region.

Download or read book The 2007 Eastern Bering Sea Continental Shelf Bottom Trawl Survey written by Elizabeth Ann Chilton and published by . This book was released on 2008 with total page 85 pages. Available in PDF, EPUB and Kindle. Book excerpt: The eastern Bering Sea bottom trawl survey has been conducted by the National Marine Fisheries Service Resource Assessment and Conservation Engineering group on an annual basis since 1971. The purpose of this survey is to collect data on the distribution and abundance of crab and groundfish resources in the eastern Bering Sea. These data will be used to estimate population abundances for the management of commercially important species in the region. In 2007, 376 standard stations were surveyed and an additional 32 stations were resampled in Bristol Bay at the end of the standard survey due to the offset in timing of the survey and the reproductive maturity of the female red king crab. The point estimate of Bristol Bay red king crab (Paralithodes camtschaticus) legal-sized male abundance was 6% greater in 2007 than 2006, and exceeded the average of 9.6 million crab for the previous 20 years. The point estimate of Pribilof District blue king crab (P. platypus) legal-sized male abundance was 0.1 million crab, which was well below the average of 0.6 million for the previous 20 years. The point estimate of Tanner crab (Chionoecetes bairdi) legal-sized male abundance was 12.1 million crab which is a decrease of 6% from 2006. The point estimate of the large male snow crab (C. opilio) abundance was 495.2 ± 134.8 million crab.

Download or read book 1990 and 1991 Southern District Kachemak Bay Dungeness Crab Pot Surveys Including Comparison to Trawl Survey Catch written by Al Kimker and published by . This book was released on 1991 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Kachemak Bay Dungeness crab survey objectives were: identify the annual timing of the molt(s); document the percentage of soft shell males; document the sex, size and shellage of the catch, and the egg condition of all females; establish an index of abundance; document the incidental catch of king and Tanner crabs.

Download or read book Tanner Crab and Bottomfish Trawl Survey of Northern Shelikof Strait Pavlof Bay the Chignik Area and Barnabas Gully During July and August 1984 written by James E. Blackburn and published by . This book was released on 1985 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Operational Plan Large mesh Bottom Trawl Survey of Crab and Groundfish Kodiak Chignik South Peninsula and Eastern Aleutian Management Districts standard Protocol 2021 2025 written by Michael Knutson and published by . This book was released on 2021 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of the large-mesh bottom trawl survey is to provide fishery managers with current stock status information for Tanner crab Chionoecetes bairdi, red king crab Paralithodes camtschaticus, and commercially important groundfish stocks in the Kodiak, Chignik, South Peninsula, and Eastern Aleutian Tanner crab districts of Westward Registration Area J. The large-mesh bottom trawl survey utilizes a 400-mesh eastern otter trawl to survey these districts and provide crab abundance estimates, size frequency distributions, density estimates, and spatial distribution of commercially important crab and groundfish to support fisheries management.

Download or read book The 2007 Eastern Bering Sea Continental Shelf Bottom Trawl Survey written by and published by . This book was released on 2008 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The eastern Bering Sea bottom trawl survey has been conducted by the National Marine Fisheries Service Resource Assessment and Conservation Engineering group on an annual basis since 1971. The purpose of this survey is to collect data on the distribution and abundance of crab and groundfish resources in the eastern Bering Sea. These data will be used to estimate population abundances for the management of commercially important species in the region. In 2007, 376 standard stations were surveyed and an additional 32 stations were resampled in Bristol Bay at the end of the standard survey due to the offset in timing of the survey and the reproductive maturity of the female red king crab. The point estimate of Bristol Bay red king crab (Paralithodes camtschaticus) legal-sized male abundance was 6% greater in 2007 than 2006, and exceeded the average of 9.6 million crab for the previous 20 years. The point estimate of Pribilof District blue king crab (P. platypus) legal-sized male abundance was 0.1 million crab, which was well below the average of 0.6 million for the previous 20 years. The point estimate of Tanner crab (Chionoecetes bairdi) legal-sized male abundance was 12.1 million crab which is a decrease of 6% from 2006. The point estimate of the large male snow crab (C. opilio) abundance was 495.2 ± 134.8 million crab.

Download or read book Project Report to the Aleutians East Borough Summarizing Results of the 2013 2016 South Peninsula Exploratory Tanner Crab Trawl Survey written by Kally Spalinger and published by . This book was released on 2017 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: Exploratory bottom trawl hauls were conducted by Alaska Department of Fish and Game (ADF&G) in areas of the South Peninsula Tanner crab management district previously unsurveyed by ADF&G large-mesh bottom trawl surveys to assess the presence of commercially important crab and groundfish species. Funding was provided by the Aleutians East Borough. Trawl hauls were conducted in Unimak Bight in 2013 and 2014, southwest of Kupreanof Peninsula in 2015, and west of Cherni Island in 2015 and 2016. Trawl hauls were evaluated for species catch composition, abundance estimates of commercially important crabs, and catch per unit effort (CPUE) of commercially important groundfish. The estimated legal male Tanner crab Chionoecetes bairdi abundance was low in each of the three areas and arrowtooth flounder Atheresthes stomias and flathead sole Hippoglossoides elassodon dominated the groundfish catch. The sizes of Tanner crab captured from these areas were similar to sizes of crab captured from nearby annually surveyed areas, but the number of crab captured was lower in Unimak Bight and Cherni Island and higher southwest of Kupreanof Peninsula. Based on 2013-2016 survey data, inclusion of these exploratory survey areas would not substantially change the abundance estimate of Tanner crab in the South Peninsula District.

Download or read book A Bottom Trawl Survey for Crabs and Groundfish in the Southern Kamishak Bay and Barren Islands Districts of the Cook Inlet Management Area 20 25 June and 10 17 July 2000 written by William R. Bechtol and published by . This book was released on 2005 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: