Genetic stock composition analysis of chinook salmon bycatch samples from the 2010 Bering Sea trawl fisheries PDF Download
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Author: Charles. M. Guthrie
Publisher:
ISBN:
Category : Bycatches (Fisheries)
Languages : en
Pages : 22
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Book Description
Author: Charles. M. Guthrie
Publisher:
ISBN:
Category : Bycatches (Fisheries)
Languages : en
Pages : 22
Get Book Here
Book Description
Author: Charles. M. Guthrie
Publisher:
ISBN:
Category : Bycatches (Fisheries)
Languages : en
Pages : 28
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Book Description
A genetic analysis of samples from the Chinook salmon (Oncorhynchus tshawytscha) bycatch of the 2011 Bering Sea-Aleutian Island (BSAI) and Gulf of Alaska (GOA) pollock trawl fisheries was undertaken to determine the stock composition of the sample set. Samples were genotyped for 43 single nucleotide polymorphism (SNP) DNA markers and results were estimated using the Alaska Department of Fish and Game (ADF&G) SNP baseline. In 2011, genetic samples from the Bering Sea were collected using a systematic random sampling protocol from one out of every 10 Chinook salmon encountered. Based on the analysis of 2,473 Chinook salmon bycatch samples collected throughout the 2011 BSAI walleye pollock (Theragra chalcogramma) trawl fishery, Coastal Western Alaska stocks dominated the sample set (68%) with smaller contributions from North Alaska Peninsula (9%), British Columbia (8%), and U.S. west coast (6%) stocks. Analysis of temporal groupings within the pollock "A" and "B" seasons revealed changes in stock composition during the course of the year with lower contributions of North Alaska Peninsula and Yukon River stocks during the "B" season. Genetic samples were also collected from Chinook salmon taken in the bycatch of the 2011 Gulf of Alaska (GOA) pollock trawl fisheries. In contrast with the Bering Sea, genetic samples were collected opportunistically in the GOA during 2011; consequently, the resulting stock composition estimates should be considered as stock compositions of the sample set rather than a representative composition of the entire GOA Chinook salmon bycatch. Based on the analysis of 240 Chinook salmon bycatch samples, British Columbia (40%) and U.S. west coast (26%) stocks comprised the largest stock groups with smaller contributions from Northwest GOA (15%) and Coastal Southeast Alaska (14%) stocks.
Author: Charles. M. Guthrie
Publisher:
ISBN:
Category : Bycatches (Fisheries)
Languages : en
Pages : 33
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Book Description
A genetic analysis of samples from the Chinook salmon (Oncorhynchus tshawytscha) bycatch of the 2012 Bering Sea-Aleutian Island (BSAI) and Gulf of Alaska (GOA) trawl fisheries for walleye pollock (Gadus chalcogrammus) was undertaken to determine the stock composition of the sample set. Samples were genotyped for 43 single nucleotide polymorphism (SNP) DNA markers and results were estimated using the Alaska Department of Fish and Game (ADF&G) SNP baseline. In 2012, genetic samples from the Bering Sea were collected using a systematic random sampling protocol where one out of every 10 Chinook salmon encountered was sampled. Based on the analysis of 1,111 Chinook salmon bycatch samples collected throughout the 2012 BSAI walleye pollock trawl fishery, Coastal Western Alaska stocks dominated the sample set (63%) with smaller contributions from North Alaska Peninsula (11%), British Columbia (10%), and West Coast U.S. (OR/CA/WA) (7%) stocks.
Author:
Publisher:
ISBN:
Category : Bycatches (Fisheries)
Languages : en
Pages : 29
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Book Description
Author: Charles. M. Guthrie
Publisher:
ISBN:
Category : Bycatches (Fisheries)
Languages : en
Pages : 21
Get Book Here
Book Description
A genetic analysis of samples from the Chinook salmon (Oncorhynchus tshawytscha) bycatch of the 2013 Bering Sea - Aleutian Island (BSAI) trawl fishery for walleye pollock (Gadus chalcogrammus) was undertaken to determine the overall stock composition of the bycatch. Samples were genotyped for 43 single nucleotide polymorphism (SNP) DNA markers and results were estimated using the Alaska Department of Fish and Game (ADF&G) SNP baseline. In 2013, genetic samples from the Bering Sea were collected using a systematic random sampling protocol where one out of every 10 Chinook salmon encountered was sampled. Based on the analysis of 1,246 Chinook salmon bycatch samples collected throughout the 2013 BSAI walleye pollock trawl fishery, Coastal Western Alaska stocks dominated the sample set (50 %) with smaller contributions from British Columbia (16 %), North Alaska Peninsula (14 %), and West Coast U.S. (OR/CA/WA) (7 %) stocks. Analysis of temporal groupings within the pollock "A" and "B" seasons revealed changes in stock composition during the course of the year with lower contributions of North Alaska Peninsula and Upper Yukon stocks and higher contributions of West Coast U.S. and NW Gulf of Alaska stocks during the "B" season .
Author: Charles. M. Guthrie
Publisher:
ISBN:
Category : Bycatches (Fisheries)
Languages : en
Pages : 25
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Book Description
A genetic analysis of samples from the Chinook salmon (Oncorhynchus tshawytscha) bycatch of the 2014 Bering Sea-Aleutian Island (BSAI) trawl fishery for walleye pollock (Gadus chalcogrammus) was undertaken to determine the overall stock composition of the bycatch. Samples were genotyped for 43 single nucleotide polymorphism (SNP) DNA markers and results were estimated using the Alaska Department of Fish and Game (ADF&G) SNP baseline. In 2014, genetic samples from the Bering Sea were collected using a systematic random sampling protocol where one out of every 10 Chinook salmon encountered was sampled. Based on the analysis of 1,385 Chinook salmon bycatch samples collected throughout the 2014 BSAI walleye pollock trawl fishery, Coastal Western Alaska stocks dominated the sample set (49%) with smaller contributions from North Alaska Peninsula (18%), British Columbia (14%), and West Coast U.S. (WA/OR/CA) (7%) stocks. Analysis of temporal groupings within the pollock "A" and "B" seasons revealed changes in stock composition during the course of the year with lower contributions of Coastal Western Alaska, North Alaska Peninsula and Yukon stocks and higher contributions of West Coast U.S. (WA/OR/CA), British Columbia, NW Gulf of Alaska and Coastal Southeast Alaska stocks during the "B" season. [doi:10.7289/V5/TM-AFSC-310 (http://dx.doi.org/10.7289/V5/TM-AFSC-310)]
Author: Charles. M. Guthrie
Publisher:
ISBN:
Category : Bycatches (Fisheries)
Languages : en
Pages : 33
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Book Description
A genetic analysis of samples from the Chinook salmon (Oncorhynchus tshawytscha) bycatch of the 2015 Bering Sea-Aleutian Island (BSAI) trawl fishery for walleye pollock (Gadus chalcogrammus) was undertaken to determine the overall stock composition of the bycatch. Samples were genotyped for 43 single nucleotide polymorphism (SNP) DNA markers and results were estimated using the Alaska Department of Fish and Game (ADF&G) SNP baseline. In 2015, genetic samples from the Bering Sea were collected using a systematic random sampling protocol where one out of every 10 Chinook salmon encountered was sampled. Based on the analysis of 1,757 Chinook salmon bycatch samples collected throughout the 2015 BSAI walleye pollock trawl fishery, Coastal Western Alaska stocks dominated the sample set (40%) with smaller contributions from British Columbia (22%), West Coast U.S. (WA/OR/CA) (15%), and North Alaska Peninsula (11%) stocks. Analysis of temporal groupings within the pollock "A" and "B" seasons revealed changes in stock composition during the course of the year with lower contributions of Coastal Western Alaska, North Alaska Peninsula, and Upper Yukon stocks and higher contributions of West Coast U.S. (WA/OR/CA), British Columbia, NW Gulf of Alaska, and Coastal Southeast Alaska stocks during the "B" season. [doi:10.7289/V5/TM-AFSC-342 (http://dx.doi.org/10.7289/V5/TM-AFSC-342)]
Author: Charles. M. Guthrie
Publisher:
ISBN:
Category : Bycatches (Fisheries)
Languages : en
Pages : 32
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Book Description
A genetic analysis of samples from the Chinook salmon (Oncorhynchus tshawytscha) bycatch of the 2016 Bering Sea-Aleutian Island (BSAI) trawl fishery for walleye pollock (Gadus chalcogrammus) was undertaken to determine the overall stock composition of the bycatch. Samples were genotyped for 43 single nucleotide polymorphism (SNP) DNA markers and results were estimated using the Alaska Department of Fish and Game (ADF&G) SNP baseline. In 2016, genetic samples from the Bering Sea were collected using a systematic random sampling protocol where one out of every 10 Chinook salmon encountered was sampled. Based on the analysis of 1,910 Chinook salmon bycatch samples collected throughout the 2016 BSAI walleye pollock trawl fishery, Coastal Western Alaska and British Columbia regions (34% and 29% respectively) dominated the sample set with smaller contributions from West Coast US (14%), and North Alaska Peninsula (13%) regions. Analysis of temporal groupings within the pollock "A" and "B" seasons revealed changes in stock composition during the course of the year with lower contributions of Coastal Western Alaska and North Alaska Peninsula regions and higher contributions of West Coast US, British Columbia, and NW Gulf of Alaska, regions during the "B" season when compared to the "A" season. . [doi:10.7289/V5/TM-AFSC-365 (https://doi.org/10.7289/V5/TM-AFSC-365)]
Author: Christine M. Kondzela
Publisher:
ISBN:
Category : Chum salmon
Languages : en
Pages : 39
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Book Description
A genetic analysis of samples from the chum salmon (Oncorhynchus keta) bycatch from the 2011 Bering Sea walleye pollock (Theragra chalcogramma) trawl fishery was undertaken to determine the overall stock composition of the sample set. Samples were genotyped for 11 microsatellite markers and results were estimated using the current chum salmon microsatellite baseline. In 2011, genetic samples were collected systematically as part of a special project to reduce sample biases that exist in collections from previous years that have the potential to affect stock composition analysis results. One genetic sample was collected for every 31.1 chum salmon caught in 97% of the midwater trawl fishery that was sampled. Evaluation of sampling based on time, location, and vessel indicated that the genetic samples were representative of the total bycatch. Based on the analysis of 1,472 chum salmon bycatch samples collected throughout the 2011 Bering Sea trawl fishery, the Eastern Gulf of Alaska (GOA)/Pacific Northwest (PNW) stocks dominated the sample set (38%), with moderate contributions from East Asian (17%), North Asian (18%), and Western Alaska (16%) stocks, and smaller contributions from Upper/Middle Yukon River (9%) stocks. The estimates for the 2011 chum salmon bycatch sample set differed from the 2005-2010 estimates, indicating a change in the consistency of the regional stock contributions across the previous 6 years, possibly due to the larger proportion of bycatch caught later in the season and in the more southeastern NMFS reporting areas in 2011. There were significant spatial differences in stock distribution, with the Asian stocks dominating the central Bering Sea area and the Eastern GOA/PNW stocks dominating the southeastern Bering Sea. Analysis of temporal groupings revealed changes in stock composition during the course of the season with decreasing contribution of East Asia and Upper/Middle Yukon stocks and increasing contribution of Eastern GOA/PNW stocks over time.
Author: Jeffrey Robert Guyon
Publisher:
ISBN:
Category : Bycatches (Fisheries)
Languages : en
Pages : 26
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Book Description
The genetic stock composition of Chinook salmon (Oncorhynchus tshawytscha) samples from the 2013 U.S. Gulf of Alaska (GOA) trawl fishery for walleye pollock (Gadus chalcogrammus) was prepared to estimate stock-specific harvests. Genetic samples were collected in 2013 from Chinook salmon taken as bycatch in this fishery predominantly from NMFS statistical areas 620, 630, and 640. Samples were genotyped for 43 single nucleotide polymorphism (SNP) DNA markers and the results were estimated using the available coastwide baseline of SNP markers for Chinook salmon. While sample sizes varied widely and did not achieve the 10% target used to sample bycatch in the Bering Sea, by using a stratified estimator weighted by stratum-specific bycatch, it was possible to estimate the stock composition of the by catch with acceptable accuracy and precision for NMFS statistical areas 620, 630, and 640, areas which comprised 84% of the bycatch in 2013. Based on the analysis of 693 Chinook salmon bycatch samples, the proportions of reporting groups were determined to be as follows: British Columbia ( 43%), U.S. West Coast (42%), coastal Southeast Alaska (11%), Northwest GOA (3%), and others (
