Distribution of Chum Salmon in the Taku River Drainage, 2004 PDF Download
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Author: James Everett Andel
Publisher:
ISBN:
Category : Chum salmon
Languages : en
Pages : 18
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Author: James Everett Andel
Publisher:
ISBN:
Category : Chum salmon
Languages : en
Pages : 18
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Author: James Everett Andel
Publisher:
ISBN:
Category : Fish populations
Languages : en
Pages : 72
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Author:
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 178
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A cooperative study involving the Department of Fisheries and Oceans Canada, the Alaska Department of Fish and Game, and the Taku River Tlingit First Nation was conducted to estimate the number of spawning Chinook salmon Oncorhynchus tshawytscha in the Taku River in 2003 with a mark-recapture experiment. Fish were captured at Canyon Island on the lower Taku River with fish wheels from May through August and were individually marked with back-sewn, solid-core spaghetti tags. All tagged fish were also batch marked with an opercle punch plus removal of the left axillary appendage. Sampling on the spawning grounds in tributaries was used to estimate the fraction of the population that had been marked. The estimated spawning abundance of small Chinook salmon ( 400 mm long; mid-eye to fork of tail) was 3,489 (SE = 1,052). Spawning abundance of medium-size Chinook salmon (401-659 mm) was estimated to be 16,780 (SE = 2,274). Finally, spawning abundance of large-size fish (= 660 mm) was estimated to be 36,435 (SE = 6,705), and the estimated total of all fish was 56,704 (SE = 7,158). The sum of the peak aerial survey counts of large spawning Chinook salmon conducted at five index tributaries of the Taku River was 16% of the mark-recapture estimate. Age 1.3 fish (1998 brood year) constituted an estimated 40% of the spawning population, followed by age 1.2 fish (1999 brood year), which constituted an estimated 29% of the population
Author:
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ISBN:
Category : Fish populations
Languages : en
Pages : 68
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Author: P. A. Milligan
Publisher:
ISBN:
Category :
Languages : en
Pages : 131
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Author:
Publisher:
ISBN:
Category : Escapement (Fisheries)
Languages : en
Pages : 186
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Author: I. Boyce
Publisher:
ISBN:
Category : Fish populations
Languages : en
Pages : 72
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Author: Jeffrey T. Williams
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 0
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Book Description
Chinook salmon Oncorhynchus tshawytscha smolt abundance and adult escapement will be estimated for the Taku stock of Chinook salmon originating from the Canadian portions of the Taku River drainage above the U.S./Canada border. This large glacial river flows into Taku Inlet about 30 km northeast of Juneau, Alaska. A modified Petersen estimator will be used to estimate smolt abundance for the 2020-2022 brood years, which are the smolt leaving the system during 2022-2024. Chinook salmon smolt will be captured from April through June, systematically sampled to estimate mean length and weight, and all healthy fish will be implanted with a coded wire tag and marked with an adipose fin clip. Escapement of large (≥660 mm; mid eye to fork of tail) and medium (401-659 mm; mid eye to fork of tail) Taku River adult Chinook salmon in 2022-2024 will be estimated using mark-recapture methodology. Adult Chinook salmon will be captured and marked near Canyon Island in the lower Taku River using fish wheels and drift gillnets from late April through early August. Each healthy fish will be tagged with a uniquely numbered, solid-core spaghetti tag and two secondary marks will be applied. Fish will be sampled for data used in age, sex, and length composition estimates of the spawning escapement.
Author:
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ISBN:
Category : Fisheries
Languages : en
Pages : 508
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Author:
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ISBN:
Category : Pacific salmon
Languages : en
Pages : 210
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