Abundance, Distribution, and Migration Patterns of Summer Chum Salmon in the Yukon River Drainage, 2014-2015 PDF Download
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Author: Sean Larson
Publisher:
ISBN:
Category : Chum salmon
Languages : en
Pages : 16
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Book Description
Summer chum salmon (Oncorhynchus keta) in the Yukon River support robust commercial and subsistence fisheries; however, fishery managers have had incomplete information about their run timing, spawning distribution, stock composition, and abundance. To address this, a radiotelemetry study was implemented on summer chum salmon in 2014 and 2015. A total of 1,232 (2014) and 1,199 (2015) summer chum salmon were fitted with radio transmitters. Radiotagged summer chum salmon were mapped, travel rates were estimated, and proportions of tagged fish recovered within different tributaries were determined. Basic mark-recapture assumptions were tested and abundance above the tagging site was estimated. Summer chum salmon were found to be widely distributed within the Yukon River drainage. Although a few tagged fish were observed in most locations, roughly 50% of tagged fish were observed in the Anvik, Koyukuk, and Bonasila rivers each year. Summer chum salmon destined for upper river spawning areas traveled faster than those to lower river areas. Summer chum salmon tended to recover quickly after being tagged, and traveled relatively fast within the mainstem Yukon River, but slowed down after entering their spawning tributaries. The 2014 mark-recapture abundance estimate was about 2,100,000 fish, which corresponded with summer chum salmon passage at the mainstem Yukon River sonar near Pilot Station. The 2015 mark-recapture abundance estimate was also about 2,100,000 fish, which was larger than the summer chum salmon passage at the sonar near Pilot Station. Results from this study help to evaluate sonar passage estimates and provide fishery managers with more detailed information about distribution and migratory patterns of individual summer chum salmon stocks within the Yukon River drainagewide population.
Author: Sean Larson
Publisher:
ISBN:
Category : Chum salmon
Languages : en
Pages : 16
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Book Description
Summer chum salmon (Oncorhynchus keta) in the Yukon River support robust commercial and subsistence fisheries; however, fishery managers have had incomplete information about their run timing, spawning distribution, stock composition, and abundance. To address this, a radiotelemetry study was implemented on summer chum salmon in 2014 and 2015. A total of 1,232 (2014) and 1,199 (2015) summer chum salmon were fitted with radio transmitters. Radiotagged summer chum salmon were mapped, travel rates were estimated, and proportions of tagged fish recovered within different tributaries were determined. Basic mark-recapture assumptions were tested and abundance above the tagging site was estimated. Summer chum salmon were found to be widely distributed within the Yukon River drainage. Although a few tagged fish were observed in most locations, roughly 50% of tagged fish were observed in the Anvik, Koyukuk, and Bonasila rivers each year. Summer chum salmon destined for upper river spawning areas traveled faster than those to lower river areas. Summer chum salmon tended to recover quickly after being tagged, and traveled relatively fast within the mainstem Yukon River, but slowed down after entering their spawning tributaries. The 2014 mark-recapture abundance estimate was about 2,100,000 fish, which corresponded with summer chum salmon passage at the mainstem Yukon River sonar near Pilot Station. The 2015 mark-recapture abundance estimate was also about 2,100,000 fish, which was larger than the summer chum salmon passage at the sonar near Pilot Station. Results from this study help to evaluate sonar passage estimates and provide fishery managers with more detailed information about distribution and migratory patterns of individual summer chum salmon stocks within the Yukon River drainagewide population.
Author: Alida Trainor
Publisher:
ISBN:
Category : Alllakaket (Alaska)
Languages : en
Pages : 74
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Book Description
This report summarizes the results of research conducted in 2014 on the local traditional knowledge of Chinook and chum salmon freshwater spawning and migration patterns in four Yukon River drainage communities. Researchers worked with respondents in Anvik, Huslia, Allakaket, and Fort Yukon to map environmental changes that may have affected salmon migration and spawning. Respondents interviewed for this study shared their lifetime experiences traveling, hunting, and fishing on the land and waters around their communities and shared their personal observations of change and changes they had heard of from others in their community or in neighboring communities. The study communities were chosen because of their proximity to an existing or an historical enumeration project. Proximity to enumeration projects gave researchers the opportunity to compare local observations of fluctuating salmon presence with existing data sets. Although this study intended to document possible changes to Chinook salmon spawning and migration, an abundance of environmental and ecological changes were also recorded. Over time, and especially in recent years, respondents have observed a variety of ecological changes. Some of these changes have impeded respondents' ability to participate in subsistence harvesting activities. Although more research is needed to explore each of these observations and their possible effects on Chinook salmon, it is clear that the environment that respondents are living in is rapidly changing and affecting all aspects of the natural world that they rely upon.
Author: Canada. Department of Fisheries and Oceans. Pacific Region. Field Services Branch
Publisher: New Westminster, B.C. : Fisheries and Oceans, Canada
ISBN:
Category : Chum salmon
Languages : en
Pages : 141
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Book Description
Author: P. A. Milligan
Publisher:
ISBN:
Category :
Languages : en
Pages : 131
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Book Description
Author: Jeffrey L. Estensen
Publisher:
ISBN:
Category : Chum salmon
Languages : en
Pages : 21
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Book Description
Author: Ted R. Spencer
Publisher:
ISBN:
Category : Chum salmon
Languages : en
Pages : 28
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Book Description
The goal of this cooperative study between the Alaska Department of Fish and Game and National Oceanic and Atmospheric Administration Fisheries was to investigate the migratory characteristics and provide preliminary information on the escapement distribution of Yukon River summer chum salmon Oncorhynchus keta. In addition to providing new information on run timing, movement patterns, and spawning distribution, these data will be used to address the management questions regarding the contribution of Anvik River and Tanana River summer chum stocks.
Author: Richard G. Bakkala
Publisher:
ISBN:
Category : Chum salmon
Languages : en
Pages : 100
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Author: Canada. Department of Fisheries and Oceans
Publisher:
ISBN:
Category : Chum salmon
Languages : en
Pages : 0
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Book Description
Author: Gary L. Todd
Publisher:
ISBN:
Category : Biotelemetry
Languages : en
Pages : 38
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Book Description
Author: Katherine W. Myers
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 32
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Book Description
