Author: Len J. Schwarz
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 88

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Author: Mark Clapsadl
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 64

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Author: Tim Motis
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 69

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Author: Donn Tracy
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 59

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Author: Donn Tracy
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 86

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Author: Julia S. Schmidt
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 41

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Author: Donn Tracy
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 48

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Author:
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 612

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Author: Jim Waldvogel
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 48

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Book Description
Age analysis for 22 years (1980 excluded) showed that the overall percentages for female spawners was 53% (4-year olds), 38% (3-year olds), and 9% (5-year olds). The age composition of male spawners showed a high degree of variability throughout the study. Male chinook of age 2, 3 and 4 were dominant annually, but 5- and 6- year old fish were present in most spawning seasons. All chinook carcasses from which scales were collected were also measured for length (over 120 samples in 22 years). Decreases in mean length were documented for all age classes for each of the El Nino episodes that occurred during the study (1982-1984; 1992-1993; 1997-1998). The decreases in mean length appeared to carry forward for each cohort's age class. The total number of chinook redds was tabulated by counting "fresh" redds during weekly spawning surveys. The mean number of redds was 117 for the 23-year period with a mean of 0.9 redds per adult salmon or 1.8 redds per female.

Author: Kristin Courtney
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 45

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The inriver abundance of large (fish =660 mm mid eye to tail fork [METF] length) Chinook salmon Oncorhynchus tshawytscha above the U.S./Canada border (border) will be estimated annually from 2022 to 2024 in the Stikine River, near Wrangell, Alaska. A modified Petersen 2-event mark–recapture project will be conducted using drift gillnets to mark large Chinook salmon in the first event, and collection of samples in the Canadian commercial fishery, Little Tahltan River video weir, and on the spawning grounds will serve as the second event. Additional project objectives are to a) estimate the annual spawning escapement of large Chinook salmon above the border, b) estimate the age, sex, and length composition of both the inriver run and spawning escapement, and c) estimate the proportion of large radiotagged Chinook salmon that cross the border. The Alaska Department of Fish and Game (ADF&G) and Fisheries and Oceans Canada (DFO) use these data to make terminal and regional management decisions, and the Pacific Salmon Commission (PSC) uses the data for coastwide management and stock assessment through the Chinook Technical Committee (CTC 2021).