Estimation of the Abundance of Chinook Salmon, Oncorhynchus Tshawytscha, in the Upper Yukon River Basin Using Mark-recapture Methods, 1990-95 PDF Download
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Author: Publisher: ISBN: Category : Languages : en Pages : 98
Book Description
Fisheries & Oceans Canada has conducted mark-recapture studies on adult Yukon River chinook salmon since 1982. In some of these studies, up to 2,174 upstream migrants were spaghetti tagged annually at two fishwheels located just upstream from the Canada/US border. Recaptures were made in a commercial fishery upstream. This report presents results from the chinook mark-recapture program for 1990 to 1995. Background on the Yukon River, its chinook population & fishery, and mark-recapture & data analysis methods begins the report. Results are presented with regard to the biological characteristics of salmon captured, abundance estimates using three estimation methods, fishery catches & spawning escapement, harvest rates, and migration rates. The final section discusses problems with respect to the abundance estimators used and makes recommendations for further research.
Author: Publisher: ISBN: Category : Languages : en Pages : 98
Book Description
Fisheries & Oceans Canada has conducted mark-recapture studies on adult Yukon River chinook salmon since 1982. In some of these studies, up to 2,174 upstream migrants were spaghetti tagged annually at two fishwheels located just upstream from the Canada/US border. Recaptures were made in a commercial fishery upstream. This report presents results from the chinook mark-recapture program for 1990 to 1995. Background on the Yukon River, its chinook population & fishery, and mark-recapture & data analysis methods begins the report. Results are presented with regard to the biological characteristics of salmon captured, abundance estimates using three estimation methods, fishery catches & spawning escapement, harvest rates, and migration rates. The final section discusses problems with respect to the abundance estimators used and makes recommendations for further research.
Author: Ted R. Spencer Publisher: ISBN: Category : Chinook salmon Languages : en Pages : 50
Book Description
Discusses the mark-recapture abundance estimates that were developed for Yukon River Chinook salmon as part of a basin-wide telemetry study conducted in 2000-2004.
Author: Ted R. Spencer Publisher: ISBN: Category : Chinook salmon Languages : en Pages : 54
Book Description
The goal of this multi-year (1999-2002) cooperative study between the Alaska Department of Fish and Game and the National Marine Fisheries Service was to determine the migratory characteristics and escapement distribution of Yukon River chinook salmon. Primary objectives in 2000 and 2001 were to assess and refine fish capture and radio-tracking methods for a full-scale program in 2002, and to estimate drainage-wide population size using mark-recapture techniques.
Author: Milligan, P. A Publisher: Whitehorse : Department of Fisheries and Oceans ISBN: Category : Chinook salmon Languages : en Pages : 161
Book Description
Funded by the Yukon River Basin Committee. Objectives of the study were to quantify the number of chinook salmon returning to the Canadian portion of the Yukon River and to examine the distribution, relative abundance and migratory behaviour of specific spawning stocks.
Author: Publisher: ISBN: Category : Chinook salmon Languages : en Pages : 178
Book Description
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: Jan L. Weller Publisher: ISBN: Category : Chinook salmon Languages : en Pages : 40
Book Description
This report estimates the abundance of medium and large chinook salmon Oncorhynchus tshawytscha that returned to spawn in the Unuk River in 2004, using a two-event mark-recapture experiment.
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Author: Johnson, Y
Author: Ted R. Spencer
Author: Ted R. Spencer
Author: Ted R. Spencer
Author: Robbin L. Hunka
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Author: Milligan, P. A
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Author: Jan L. Weller