Groundfish Population Trends from the Prince William Sound Bottom Trawl Survey, 1991 to 2015

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Total Pages : 0 pages
Book Rating : 4.:/5 (135 download)

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Book Synopsis Groundfish Population Trends from the Prince William Sound Bottom Trawl Survey, 1991 to 2015 by : Michael Morgan Byerly

Download or read book Groundfish Population Trends from the Prince William Sound Bottom Trawl Survey, 1991 to 2015 written by Michael Morgan Byerly and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report summarizes the groundfish catch from the Prince William Sound bottom trawl survey conducted from 1991 to 2015. Although the purpose of the trawl survey is to assess Tanner crab Chionoecetes bairdi abundance, many groundfish species are also captured, thus providing opportunities to examine population and biological trends over the time series. The catch composition for all species is first characterized at the taxonomic class level and then for fish species at the family level. Time series are then presented for biomass estimates, biological data trends, and spatial trends in CPUE for select commercial and recreationally harvested groundfish species, including rougheye and blackspotted rockfish Sebastes aleutianus and S. melanostictus, Pacific cod Gadus macrocephalus, walleye pollock G. chalcogrammus, sablefish Anoplopoma fimbria, longnose skate Raja rhina, big skate Beringraja binoculata, and Bering skate Bathyraja interrupta. Relatively precise biomass estimates were obtained for most species, although precision was more variable for Pacific cod and sablefish. Following a decline in the early 1990s, rougheye/blackspotted rockfish biomass has remained relatively stable since 1997, fluctuating at or below the long-term average, whereas walleye pollock displayed a more pronounced cyclic trend. Biomass estimates for all skate species have increased since 2007. Biomass estimates were also contrasted with those from the National Oceanic and Atmospheric Administration, Gulf of Alaska bottom trawl survey. Similarities in relative biomass trends between Prince William Sound and the Gulf of Alaska were evident for all species at varying degrees.

Data Report

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ISBN 13 :
Total Pages : 179 pages
Book Rating : 4.:/5 (73 download)

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Book Synopsis Data Report by : Nate W. Raring

Download or read book Data Report written by Nate W. Raring and published by . This book was released on 2011 with total page 179 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scientists of the Groundfish Assessment Program of Alaska Fisheries Science Center's Resource Assessment and Conservation Engineering (RACE) Division conducted the second biennial groundfish assessment survey of the Gulf of Alaska during the summer of 2001. These surveys extend the series of surveys, previously conducted every 3 years between 1984 and 1999, which constitute the time series used in stock assessments of Gulf of Alaska groundfish resources. The survey area covered the continental shelf and upper continental slope to 500 m in the Gulf of Alaska from Islands of Four Mountains (170° W long.) to the east end of Prince William Sound (132° 40' W long.). The survey was conducted aboard three chartered commercial trawlers, and the FV Morning Star and the FV Vesteraalen. Trawl haul samples were collected successfully at 489 survey stations using standard RACE Division Poly Nor'Eastern high-opening bottom trawl nets with rubber bobbin roller gear. The primary survey objectives were to define the distribution and estimate the relative abundance of the principal groundfish within the survey area and to collect data to estimate biological parameters useful to groundfish researchers and managers including age, growth, length-weight relationships, feeding habits, and size, sex, and age composition. The survey also collected ancillary data requested by other research groups. More than 138 fish and 304 invertebrate species were captured in survey tows. The species highest in total catch abundance (by weight) over the entire survey area were arrowtooth flounder (Atheresthes stomias), Pacific ocean perch (Sebates alutus), Pacific halibut (Hippoglossus stenolepis) and northern rockfish (Sebastes polyspinis). Survey results are presented including estimates of catch per unit of effort, biomass, population size composition, and length-weight relationships, as well as charts depicting the distribution of catch for commercially important species encountered during the survey.

Data Report

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ISBN 13 :
Total Pages : 249 pages
Book Rating : 4.:/5 (957 download)

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Book Synopsis Data Report by : Paul Gunnar Von Szalay

Download or read book Data Report written by Paul Gunnar Von Szalay and published by . This book was released on 2016 with total page 249 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This report presents data from the 2015 Gulf of Alaska groundfish survey conducted by the Alaska Fisheries Science Center of the National Marine Fisheries Service. It contains detailed descriptions of the survey planning and operations, species distribution and abundance charts, length frequency plots, tables of estimated biomass, catch per unit effort, average weight and length estimates, length frequency plots, length-weight regression parameters, lists of identified species, survey strata specifications and charts, and trawl descriptions and diagrams"--Preface. [doi:10.7289/V5/TM-AFSC-325 (http://dx.doi.org/10.7289/V5/TM-AFSC-325)]

A Summary of Estimated Population Trends of Seven Most Abundant Groundfish Species in Trawl Surveys Conducted by Alaska Department of Fish and Game in the Kodiak and Alaska Peninsula Areas, 1988 Through 1993

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ISBN 13 :
Total Pages : 28 pages
Book Rating : 4.:/5 (156 download)

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Book Synopsis A Summary of Estimated Population Trends of Seven Most Abundant Groundfish Species in Trawl Surveys Conducted by Alaska Department of Fish and Game in the Kodiak and Alaska Peninsula Areas, 1988 Through 1993 by : James E. Blackburn

Download or read book A Summary of Estimated Population Trends of Seven Most Abundant Groundfish Species in Trawl Surveys Conducted by Alaska Department of Fish and Game in the Kodiak and Alaska Peninsula Areas, 1988 Through 1993 written by James E. Blackburn and published by . This book was released on 1994 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Distribution, Abundance, and Biological Characteristics of Groundfish in the Eastern Bering Sea Based on Results of the U.S. Bottom Trawl Survey During June-September 1991

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ISBN 13 :
Total Pages : 324 pages
Book Rating : 4.:/5 (342 download)

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Book Synopsis Distribution, Abundance, and Biological Characteristics of Groundfish in the Eastern Bering Sea Based on Results of the U.S. Bottom Trawl Survey During June-September 1991 by : Pamela Goddard

Download or read book Distribution, Abundance, and Biological Characteristics of Groundfish in the Eastern Bering Sea Based on Results of the U.S. Bottom Trawl Survey During June-September 1991 written by Pamela Goddard and published by . This book was released on 1993 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Visualization of Ontogenetic and Interannual Distributional Shifts of Groundfish from the Alaska Fisheries Science Center Eastern Bering Sea Bottom Trawl Survey, 1982-2015

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ISBN 13 :
Total Pages : 330 pages
Book Rating : 4.:/5 (982 download)

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Book Synopsis Visualization of Ontogenetic and Interannual Distributional Shifts of Groundfish from the Alaska Fisheries Science Center Eastern Bering Sea Bottom Trawl Survey, 1982-2015 by : Steven J. Barbeaux

Download or read book Visualization of Ontogenetic and Interannual Distributional Shifts of Groundfish from the Alaska Fisheries Science Center Eastern Bering Sea Bottom Trawl Survey, 1982-2015 written by Steven J. Barbeaux and published by . This book was released on 2017 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since 1982, the Alaska Fisheries Science Center has conducted standardized bottom trawl surveys of the eastern Bering Sea (EBS) shelf area between 20 m and 200 m in summer (May - August). During these surveys researchers have collected species composition and bottom temperature for all tows as well as measurements from all fish species encountered. These data have been used to create visualizations of spatial distribution and distribution by bottom depth and temperature by length bins for all available surveys for 22 groundfish and skate species. This provides a unique look at the spatial and environmental preferences of a wide variety of species, as well as ontogenetic shifts in spatial distribution and environmental preferences over 34 years. The visualizations provided in this paper are meant to facilitate a better understanding of the life histories of these species over time and space and provide clues to how climate change may potentially impact species at different life stages. [doi:10.7289/V5/TM-AFSC-348 (https://doi.org/10.7289/V5/TM-AFSC-348)]

Results of the 2015 Eastern Bering Sea Continental Shelf Bottom Trawl Survey of Groundfish and Invertebrate Resources

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ISBN 13 :
Total Pages : 154 pages
Book Rating : 4.:/5 (987 download)

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Book Synopsis Results of the 2015 Eastern Bering Sea Continental Shelf Bottom Trawl Survey of Groundfish and Invertebrate Resources by : Jason Conner

Download or read book Results of the 2015 Eastern Bering Sea Continental Shelf Bottom Trawl Survey of Groundfish and Invertebrate Resources written by Jason Conner and published by . This book was released on 2017 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Resource Assessment and Conservation Engineering Division of the Alaska Fisheries Science Center conducts annual bottom trawl surveys to monitor the condition of the demersal fish and crab stocks of the eastern Bering Sea continental shelf. The standard study area encompasses a major portion of the eastern Bering Sea shelf (depths between 20 and 200 m) from the Alaska Peninsula north to approximately the latitude of St. Matthew Island (60° 50' N). In 2015, two chartered trawlers, the 38-m FV Vesteraalen and the 43.5-m FV Alaska Knight, surveyed this area. Demersal populations were sampled by trawling for 30 minutes at stations centered within 37.04 × 37.04 km (20 × 20 naultical mile (nmi)) grids covering the survey area. At each station, species composition of the catch was determined, and length distributions and age structure samples were collected from ecologically and commercially important species. Three-hundred seventy-six standard survey stations were sampled successfully. A total of 101 fish species and 235 invertebrate taxa were identified in catches from the EBS survey. The combined biomass of walleye pollock (Gadus chalcogrammus), Pacific cod (Gadus macrocephalus), yellowfin sole (Limanda aspera), and northern rock sole (Lepidopsetta polyxystra) was estimated to be 10.8 million metric tons (t), which was 82% of the total fish biomass. The biomass of invertebrates was composed primarily of echinoderms (1.4 million t) and crustaceans (0.7 million t). Survey results presented in this report include abundance estimates for fishes and invertebrates, geographic distributions and size compositions of selected fish species, and contour plots of surface and bottom temperatures during the survey sampling period. Appendices provide station data, catch data summarized by station, taxon listings, and detailed analyses of abundance and biological data of the sampled populations. [doi:10.7289/V5/TM-AFSC-353 (https://doi.org/10.7289/V5/TM-AFSC-353)]

Data Report

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ISBN 13 :
Total Pages : 231 pages
Book Rating : 4.:/5 (959 download)

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Book Synopsis Data Report by : Nate W. Raring

Download or read book Data Report written by Nate W. Raring and published by . This book was released on 2016 with total page 231 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scientists of the Groundfish Assessment Program of Alaska Fisheries Science Center's Resource Assessment and Conservation Engineering (RACE) Division conducted the seventh biennial groundfish assessment survey of the Gulf of Alaska during the summer of 2011. These surveys extend the series of surveys, previously conducted every 3 years between 1984 and 1999, which constitute the time series used in stock assessments of Gulf of Alaska groundfish resources. The survey area covered the continental shelf and upper continental slope to 700 m in the Gulf of Alaska from Islands of Four Mountains (170° W long.) and continued eastward approximately 2,800 km across the Gulf of Alaska to Dixon Entrance (133° 25' W long.). The survey was conducted aboard two chartered commercial trawlers, the FV Ocean Explorer and the FV Sea Storm. Trawl haul samples were successfully collected at 670 survey stations using standard RACE Division Poly Nor'Eastern high-opening bottom trawl nets with rubber bobbin roller gear. The primary survey objectives were to define the distribution and estimate the relative abundance of the principal groundfish within the survey area and to collect data to estimate biological parameters useful to groundfish researchers and managers including age, growth, length-weight relationships, feeding habits, and size, sex, and age composition. The survey also collected ancillary data requested by other research groups. More than 150 fish and 360 invertebrate species were captured in survey tows. The species highest in total catch abundance (by weight) over the entire survey area were arrowtooth flounder (Atheresthes stomias), Pacific ocean perch (Sebastes alutus), Pacific cod (Gadus macrocephalus), and Pacific halibut (Hippoglossus stenolepis). Survey results are presented including estimates of catch per unit of effort, biomass, population size composition, and lengthweight relationships, as well as charts depicting the distribution of catch for commercially important species encountered during the survey. [doi:10.7289/V5/TM-AFSC-330 (http://dx.doi.org/10.7289/V5/TM-AFSC-330)]

Ecosystem-Based Fisheries Management

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Publisher : Oxford University Press
ISBN 13 : 0192655434
Total Pages : 672 pages
Book Rating : 4.1/5 (926 download)

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Book Synopsis Ecosystem-Based Fisheries Management by : Jason S. Link

Download or read book Ecosystem-Based Fisheries Management written by Jason S. Link and published by Oxford University Press. This book was released on 2021-11-15 with total page 672 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ecosystem-based fishery management (EBFM) is rapidly becoming the default approach in global fisheries management. The clarity of what EBFM means is sharpening each year and there is now a real need to evaluate progress and assess the effectiveness and impacts. By examining a suite of over 90 indicators (including socioeconomic, governance, environmental forcing, major pressures, systems ecology, and fisheries criteria) for 9 major US fishery ecosystem jurisdictions, the authors systematically track the progress the country has made towards advancing EBFM and making it an operational reality. The assessment covers a wide range of data in both time (multiple decades) and space (from the tropics to the poles, representing over 10% of the world's ocean surface area). The authors view progress towards the implementation of EBFM as synonymous with improved management of living marine resources in general, and highlight the findings from a national perspective. Although US-centric, the lessons learned are directly applicable for all parts of the global ocean. Much work remains, but significant progress has already been made to better address many of the challenges facing the sustainable management of our living marine resources. This is an essential and accessible reference for all fisheries professionals who are currently practicing, or progressing towards, ecosystem-based fisheries management. It will also be of relevance and use to researchers, teachers, managers, and graduate students in marine ecology, fisheries biology, biological oceanography, global change biology, conservation biology, and marine resource management.

Assessment of Groundfish Stocks Based on Bottom Trawl Survey Results

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ISBN 13 :
Total Pages : 110 pages
Book Rating : 4.:/5 (191 download)

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Book Synopsis Assessment of Groundfish Stocks Based on Bottom Trawl Survey Results by : Northwest Atlantic Fisheries Organization

Download or read book Assessment of Groundfish Stocks Based on Bottom Trawl Survey Results written by Northwest Atlantic Fisheries Organization and published by . This book was released on 1993 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Assessment of Groundfish Stocks Based on Bottom Trawl Survey Results

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ISBN 13 :
Total Pages : 105 pages
Book Rating : 4.:/5 (191 download)

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Book Synopsis Assessment of Groundfish Stocks Based on Bottom Trawl Survey Results by : Northwest Atlantic Fisheries Organization

Download or read book Assessment of Groundfish Stocks Based on Bottom Trawl Survey Results written by Northwest Atlantic Fisheries Organization and published by . This book was released on 1996 with total page 105 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Data Report

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ISBN 13 :
Total Pages : 233 pages
Book Rating : 4.:/5 (959 download)

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Book Synopsis Data Report by : Nate W. Raring

Download or read book Data Report written by Nate W. Raring and published by . This book was released on 2016 with total page 233 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fourth biennial groundfish survey of groundfish and invertebrate resources of the Gulf of Alaska (GOA) was conducted during the summer of 2005 by the National Marine Fisheries Service's (NMFS) Alaska Fisheries Science Center (AFSC). Scientists from the Groundfish Assessment Program of AFSC's Resource Assessment and Conservation Engineering (RACE) Division in Seattle, Washington, were responsible for the survey’s design and operations. The biennial regimen extends the series begun in 1984, previously conducted every 3 years between 1984 and 1999, which have provided a time series of distribution, abundance, and biological characteristics of GOA groundfish resources for the purpose of stock assessment and management. In this report, we document the operations and results of the 2005 GOA bottom trawl survey. Results of routine analyses of distribution, relative abundance, size composition, and biological characteristics are shown for the principal groundfish species in each of the five International North Pacific Fisheries Commission (INPFC) statistical areas in the GOA: Shumagin, Chirikof, Kodiak, Yakutat, and Southeastern. These results provide stock assessment scientists and resource managers the most current information to be used for subsequent stock assessments and fishery evaluations. Only the 2005 survey results are presented and no comparisons are made to the results of previous GOA surveys. [doi:10.7289/V5/TM-AFSC-329 (http://dx.doi.org/10.7289/V5/TM-AFSC-329)]

Review of 1993 Groundfish Fisheries in Prince William Sound

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ISBN 13 :
Total Pages : 40 pages
Book Rating : 4.:/5 (858 download)

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Book Synopsis Review of 1993 Groundfish Fisheries in Prince William Sound by : William R. Bechtol

Download or read book Review of 1993 Groundfish Fisheries in Prince William Sound written by William R. Bechtol and published by . This book was released on 1994 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Prince William Sound Registration Area E Groundfish Management Report, 1996-2005

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ISBN 13 :
Total Pages : 44 pages
Book Rating : 4.:/5 (277 download)

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Book Synopsis Prince William Sound Registration Area E Groundfish Management Report, 1996-2005 by : Robert S. Berceli

Download or read book Prince William Sound Registration Area E Groundfish Management Report, 1996-2005 written by Robert S. Berceli and published by . This book was released on 2008 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: Harvest statistics of the commercial groundfish fisheries within the Prince William Sound (PWS) Registration Area E. The PWS area includes waters of Alaska from Cape Sucking to Cape Fairfield and is divided into the Inside and Outside management districts. The Inside District only includes waters of PWS; the Outside District includes waters of the Gulf of Alaska within 3 nmi of shore including offshore islands. The Outside District is further divided into two management sections; the Eastern Section which extends from Cape Suckling at 144° W. longitude to 147° W. longitude and the Western Section which extends from 147° W. longitude to Cape Fairfield at 148° 50'.25 W. longitude.

Data Report

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ISBN 13 :
Total Pages : 219 pages
Book Rating : 4.:/5 (958 download)

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Book Synopsis Data Report by : Nate W. Raring

Download or read book Data Report written by Nate W. Raring and published by . This book was released on 2016 with total page 219 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scientists of the Groundfish Assessment Program of Alaska Fisheries Science Center's Resource Assessment and Conservation Engineering (RACE) Division conducted the third biennial groundfish assessment survey of the Gulf of Alaska during the summer of 2003. These surveys extend the series of surveys, previously conducted every 3 years between 1984 and 1999, which constitute the time series used in stock assessments of Gulf of Alaska groundfish resources. The survey area covered the continental shelf and upper continental slope to 700 m in the Gulf of Alaska from Islands of Four Mountains (170° W long.) and continued eastward approximately 2,800 km across the Gulf of Alaska to Dixon Entrance (133° 25' W long.). The survey was conducted aboard three chartered commercial trawlers, the FV Gladiator, the FV Northwest Explorer and the FV Sea Storm. Trawl haul samples were collected successfully at 809 survey stations using standard RACE Division Poly Nor'Eastern high-opening bottom trawl nets with rubber bobbin roller gear. The primary survey objectives were to define the distribution and estimate the relative abundance of the principal groundfish within the survey area and to collect data to estimate biological parameters useful to groundfish researchers and managers including age; growth; length-weight relationships; feeding habits; and size, sex, and age composition. The survey also collected ancillary data requested by other research groups. More than 176 fish and 362 invertebrate species were captured in survey tows. The species highest in total catch abundance (by weight) over the entire survey area were arrowtooth flounder (Atheresthes stomias), Pacific halibut (Hippoglossus stenolepis), Pacific ocean perch (Sebastes alutus), and walleye pollock (Theragra chalcogramma). Survey results are presented including estimates of catch per unit of effort, biomass, population size composition, and lengthweight relationships, as well as charts depicting the distribution of catch for commercially important species encountered during the survey. [doi:10.7289/V5/TM-AFSC-328 (http://dx.doi.org/10.7289/V5/TM-AFSC-328)]

Prince William Sound Registration Area E Groundfish Fisheries Management Report, 2017-2020

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ISBN 13 :
Total Pages : 70 pages
Book Rating : 4.:/5 (123 download)

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Book Synopsis Prince William Sound Registration Area E Groundfish Fisheries Management Report, 2017-2020 by : Jan Rumble

Download or read book Prince William Sound Registration Area E Groundfish Fisheries Management Report, 2017-2020 written by Jan Rumble and published by . This book was released on 2021 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Alaska Department of Fish and Game (ADF&G) Division of Commercial Fisheries manages commercial groundfish fisheries within Prince William Sound Registration Area E (PWS) that includes territorial waters of Alaska from Cape Sucking at 144°00'W long to Cape Fairfield at 148°50.25'W long. Harvests of sablefish Anoplopoma fimbria, walleye pollock Gadus chalcogrammus, lingcod Ophiodon elongates, and Pacific cod Gadus macrocephalus are managed by season for specific guideline harvest levels (GHL). Rockfish species (genera Sebastes and Sebastolobus) are managed collectively as bycatch to other directed fisheries. Miscellaneous groundfish species including flatfish, sharks, and skates, as well as shellfish species including octopus and squid, are also landed incidentally in the directed groundfish fisheries. ADF&G also has management authority of lingcod and black rockfish Sebastes melanops in federal waters of the exclusive economic zone (EEZ) from 3 nmi to 200 nmi offshore. The 2019 state-managed groundfish harvest totaled 8.0 million lb. The directed pollock trawl harvest was 6.5 million lb, 99% of the GHL. The total Pacific cod harvest from both parallel and state-waters fisheries was 0.5 million lb, the lowest since 2008 due to the decline in the Gulf of Alaska (GOA) stock, associated federal quota, and corresponding GHL. The 2019 directed sablefish harvest of 85,796 lb was 64% of the 134,000 lb GHL, with a steadily increasing trend since the lowest harvest of 16,910 lb in 2015. In 2019, the rockfish harvest retained as bycatch to other directed fisheries was 71,976 lb, well below the historical average and less than half of the GHL, primarily due to the decrease in directed Pacific cod harvest. Lingcod harvest was 26,408 lb in 2019, similar to the historical average. In 2019, walleye pollock generated the highest exvessel value of $897,152, followed by Pacific cod at $266,291, and sablefish at $178,456; all groundfish harvested in PWS had a combined value of $1.4 million.

Review of Prince William Sound Management Area Groundfish Fisheries, 2008

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ISBN 13 :
Total Pages : 32 pages
Book Rating : 4.:/5 (2 download)

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Book Synopsis Review of Prince William Sound Management Area Groundfish Fisheries, 2008 by :

Download or read book Review of Prince William Sound Management Area Groundfish Fisheries, 2008 written by and published by . This book was released on 2008 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Harvest statistics of the commercial groundfish fisheries within Prince William Sound Registration Area E that includes territorial waters of Alaska from Cape Sucking at 144° 00ʹ W. longitude to Cape Fairfield at 148° 50ʹ 25ʺ W. longitude.