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Book Age Composition and Spawning Escapement of Chinook Salmon in the Karluk Ayakulik and Chignik Rivers Alaska 1997 and 1998

Download or read book Age Composition and Spawning Escapement of Chinook Salmon in the Karluk Ayakulik and Chignik Rivers Alaska 1997 and 1998 written by Mark Clapsadl and published by . This book was released on 2002 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Age Composition and Spawning Escapement of Chinook Salmon in the Karluk Ayakulik and Chignik Rivers Alaska 1995 and 1996

Download or read book Age Composition and Spawning Escapement of Chinook Salmon in the Karluk Ayakulik and Chignik Rivers Alaska 1995 and 1996 written by Tim Motis and published by . This book was released on 1997 with total page 69 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Age Composition and Spawning Escapement of Chinook Salmon in the Karluk Ayakulik and Chignik Rivers Alaska 1993 and 1994

Download or read book Age Composition and Spawning Escapement of Chinook Salmon in the Karluk Ayakulik and Chignik Rivers Alaska 1993 and 1994 written by Len J. Schwarz and published by . This book was released on 1996 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Fishery Data Series

Download or read book Fishery Data Series written by and published by . This book was released on 1997 with total page 612 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Fall Chinook Oncorhynchus Tshawytscha

Download or read book Fall Chinook Oncorhynchus Tshawytscha written by Jim Waldvogel and published by . This book was released on 2006 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Book Postseason Sockeye and Chinook Salmon Escapement Estimates for the Karluk and Ayakulik Rivers and Dog Salmon Creek 1998

Download or read book Postseason Sockeye and Chinook Salmon Escapement Estimates for the Karluk and Ayakulik Rivers and Dog Salmon Creek 1998 written by Nicholas H. Sagalkin and published by . This book was released on 2000 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book A Historical Summary of Harvest Age Composition and Escapement Information of Copper River Chinook Salmon 1969 1998

Download or read book A Historical Summary of Harvest Age Composition and Escapement Information of Copper River Chinook Salmon 1969 1998 written by Matthew J. Evenson and published by . This book was released on 1999 with total page 77 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Age Sex and Length Distributions of Chinook Salmon Escapement Samples from the Goodnews Kanektok and Togiak Rivers Togiak National Wildlife Refuge Alaska 1997

Download or read book Age Sex and Length Distributions of Chinook Salmon Escapement Samples from the Goodnews Kanektok and Togiak Rivers Togiak National Wildlife Refuge Alaska 1997 written by Rob MacDonald and published by . This book was released on 1998 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Spawning Escapement of Chinook Salmon in the Stikine River 2022 2024

Download or read book Spawning Escapement of Chinook Salmon in the Stikine River 2022 2024 written by Kristin Courtney and published by . This book was released on 2022 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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).

Book Chinook Salmon Age Sex and Length Analysis from Selected Escapement Projects on the Yukon River

Download or read book Chinook Salmon Age Sex and Length Analysis from Selected Escapement Projects on the Yukon River written by Karen Hyer and published by . This book was released on 2005 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: Anecdotal information from fishers along the Yukon River suggests that the length of chinook salmon harvested and the proportion of female Chinook salmon in the run have decreased over time. To determine whether sex composition, size, age, and size-at-age of chinook salmon in spawning escapements have experienced a basin-wide decline over time, we examined escapement data from the Andreafsky, Anvik, Gisasa, Salcha, Chena, and Big Salmon Rivers. The scope of the analysis is limited to a relatively small number of spawning tributaries over a relatively short time period during which both fisheries and environmental changes have occurred confounding the ability to establish the sources of the decreasing size trend in Yukon River Chinook salmon.

Book Spawning Abundance of Chinook Salmon in the Taku River in 2003

Download or read book Spawning Abundance of Chinook Salmon in the Taku River in 2003 written by and published by . This book was released on 2006 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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

Book Escapements of Chinook Salmon in Southeast Alaska and Transboundary Rivers in 2022

Download or read book Escapements of Chinook Salmon in Southeast Alaska and Transboundary Rivers in 2022 written by Philip Richards and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Estimates of Chinook salmon Oncorhynchus tshawytscha spawning escapement in 2022 will be summarized for 11 Southeast Alaska river systems: Situk River, Alsek River, Chilkat River, Taku River, King Salmon River, Stikine River, Unuk River, Chickamin River, Blossom River, Keta River, and Andrew Creek. Spawning escapements will be estimated using aerial surveys, foot surveys, mark–recapture studies, and weirs. The Alaska Department of Fish and Game and Fisheries and Oceans Canada use these data, along with age composition data to make terminal and regional management decisions, and the Pacific Salmon Commission uses these data for coastwide management and stock assessment.