Assessment of the Canadian and Alaskan Sockeye Stocks Harvested in the Northern Boundary Fisheries Using Run Reconstruction Techniques, 1982-2001 PDF Download
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Author:
Publisher:
ISBN:
Category : Fish populations
Languages : en
Pages : 104
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Book Description
Author:
Publisher:
ISBN:
Category : Fish populations
Languages : en
Pages : 104
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Book Description
Author: Canada. Department of Fisheries and Oceans
Publisher: [Prince Rupert, B.C.] : Fisheries and Oceans Canada
ISBN:
Category : Fish stock assessment
Languages : en
Pages : 132
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Book Description
Author: Julie Bednarski
Publisher:
ISBN:
Category : Escapement (Fisheries)
Languages : en
Pages : 18
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Book Description
The 2021 forecast of Stikine River sockeye salmon, Oncorhynchus nerka, run abundance is poor and we anticipate very little harvesting opportunity for either U.S. or Canadian fisheries. Since 1994, we have almost exclusively relied on the Canadian lower river commercial fishery to provide the migratory timing information that is used to complete the mixed stock run reconstruction for Stikine River sockeye salmon. It is highly likely there will be no fishing opportunity in 2021 to gather this pertinent information. To obtain stock composition data necessary to estimate the inriver abundance, we are initiating a sockeye salmon stock assessment program at Kakwan Point. The project will be conducted in conjunction with the existing Stikine River Chinook salmon, O. tshwaytscha, assessment program, and will extend the project through the end of the sockeye salmon run in late August. Tissue samples will be collected from sockeye salmon for genetic mixed stock analysis and for use in a genetic mark–recapture study to estimate inriver abundance based on an expansion of the Tahltan stock that is monitored via weir. We will also gather daily catch per unit effort (CPUE) information and estimate the age, sex and length (ASL) composition for sockeye salmon captured. This stock assessment program is designed to capture sockeye salmon in proportion to abundance during immigration; therefore, it is expected that it will provide an unbiased estimate of abundance. This estimate will be assessed by TTC postseason for use in the Stikine River sockeye salmon run reconstruction.
Author: Richard A. Bloomquist
Publisher:
ISBN:
Category : Fish stock assessment
Languages : en
Pages : 30
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Book Description
Sockeye salmon (Oncorhynchus nerka) harvested in 2002 in southern Southeast Alaska's gillnet and purse seine fisheries were classified to nation or stock group of origin by using linear discriminant function analysis of scale patterns, coupled with age composition data. The general groups were Alaskan, Canadian, and transboundary river stocks. Separate Canadian stock contribution estimates (Nass River, Skeena River, and other south-migrating stocks) are presented for some districts. Stock contribution estimates are presented by age class and week for all major fisheries.
Author: Craig W. Farrington
Publisher:
ISBN:
Category : Fish stock assessment
Languages : en
Pages : 92
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Book Description
"Sockeye salmon Oncorhynhus nerka harvested in southern Southeast Alaska's 1992 gillnet and purse seine fisheries were classified to nation and/or stock of origin using linear discriminant function analysis of scale patterns and age composition data"--Abstract.
Author: James Everett Andel
Publisher:
ISBN:
Category : Fish populations
Languages : en
Pages : 180
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Book Description
Annual mark-recapture studies of adult Taku River sockeye salmon (Oncorhyncus nerka) stocks were conducted by the Alaska Department of Fish and Game, the Canadian Department of Fisheries and Oceans and the Taku River First Nation from 1998 to 2002. The objectives of the program were: to provide annual inseason estimates of the inriver abundance of sockeye salmon and to document biological characteristics (migratory timing, migratory rates and age, sex, and size composition) of Taku River sockeye stocks. Marked-to unmarked ratios of salmon harvested in the Canadian inriver gillnet fisheries were used to develop estimates of the inriver abundance of sockeye. During the years 1998 to 2002, an annual averageof 5,349 sockeye salmon were tagged in fish wheels located at Canyon Island, Alaska, of which an average of 1,080 (20.2%) sockeye were subsequently recovered in fisheries or on the spawning grounds.The annual post-season inriver runestimates of sockeye salmon past Canyon Island from 1998 to 2002 was estimated to be 91,548, 113,705, 115,693, 192,269, and 135,233, fish respectively. Annual inriver Canadian commercial, aboriginal and test fisheries combined harvested 19,038, 20,681, 27,942, 47,998, and 31,053 sockeye salmon during those same years (1998 to 2002). The resulting annual spawning escapement estimtes for Taku River sockeye salmon from 1998 to 2002 was 72,271, 95,562, 87,298, 144,071, 103,343, fish respectively.The migratory timing (mean dates and standard deviation of migration) and run timing of the sockeye salmon run was similar to the 15 year average. The Kuthai Lake sockeye salmon stocks dominated the early portion, the Little Trapper Lake the middle portion, and the Tatsamenie Lake and mainstem stocks the late portion of the Taku River sockeye salmon run. Pink fish wheel catches were strong in 1998 and 1999 but below average in 2000 to 2002. Chum salmon fish wheel catches for this 5-year period continued to exhibit the trend of low catches that began in the mid-1980's.
Author: Craig W. Farrington
Publisher:
ISBN:
Category : Fish stock assessment
Languages : en
Pages : 87
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Book Description
"Sockeye salmon Oncorhynhus nerka harvested in southern Southeast Alaska's 1991 gillnet and purse seine fisheries were classified to nation and/or stock of origin using linear discriminant function analysis of scale patterns and age composition data"--Abstract.
Author: Craig W. Farrington
Publisher:
ISBN:
Category : Fish stock assessment
Languages : en
Pages : 128
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Book Description
"Sockeye salmon Oncorhynhus nerka harvested in southern Southeast Alaska's 1990 gillnet and purse seine fisheries were classified to nation and/or stock of origin using linear discriminant function analysis of scale patterns and age composition data"--Abstract.
Author: Andrew W. Barclay
Publisher:
ISBN:
Category : Fish stock identification
Languages : en
Pages : 34
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Book Description
Genetic mixed stock analysis has been used to estimate the stock compositions of sockeye salmon Oncorhynchus nerka harvested in commercial fisheries in Upper Cook Inlet (UCI), Alaska, since 2005. Here we report the genetic mixed stock analysis of samples representing 90.5% of the 2014 UCI commercial fishery harvests. Postseason analyses were performed using a previously reported baseline of 69 populations and 96 single nucleotide polymorphic markers, with the addition of 2 populations in the West reporting group (Harriet Creek and Packers Lake late run). Some stock composition patterns in the commercial fishery were similar to previous years. Drift gillnet and eastern fisheries captured greater proportions of Kenai and Kasilof rivers fish than western and northern fisheries; western set gillnet fisheries harvested a greater proportion of fish from the west side of Cook Inlet, but the drift gillnet fishery harvested greater numbers of west side fish; set gillnet fisheries closer to the Kenai or Kasilof river mouths harvested larger proportions of fish from those rivers; and set gillnet fishing areas in the Northern District generally harvested fish from nearby rivers. Unexpectedly, Susitna River fish made up a higher fraction of the drift gillnet harvest when the fleet was restricted to eastern Cook Inlet waters than when they were not restricted to eastern waters. Estimates of stock-specific harvests for UCI commercial fisheries in 2014 build upon previous years in refining understanding of productivity and the effect of management actions on the stock composition of commercial sockeye salmon harvests.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 73
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Book Description
It has long been known that sockeye salmon returning to the Skeena River as maturing adults are harvested in numerous fisheries both in B.C. and Alaska. Since 1982, several investigations have been carried out, designed to provide estimates of the proportion of the catch taken in major net fisheries in northern B.C. and southern southeast Alaska that was of Skeena River origin. This study used these estimates of stock composition to reconstruct the total size of the return of sockeye salmon to the Skeena River for brood years from 1965-82. Age structure information was used to apportion the catch and escapement to the appropriate brood year. The proportion of the catch in each of the major interception fisheries from 1982-87 was based on a series of studies using tagging, genetic, scale pattern and parasite markers. Three different procedures were used to estimate stock composition for the years prior to 1982 and for 1988. The total run size estimates from each of the 3 procedures are compared.
