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Report: Rates of Movement and Timing of Migrations of Steelhead Trout to and within the Skeena River, 1988
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If you have any questions on the information presented, or require additional report data or attachments, please contact the Report Contact
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This report summarizes a study done on migration of steelhead in the Skeena river watershed. The report is 25 pages long. For a summary, see the long description.
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Author: C.R. Spence
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Old Reference Number: sk62
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Date Published: May 1989
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Report ID: 1679
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Audience: Government and Public
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Report summary: Summer-run steelhead (Oncorhychus mykiss) returning to the Skeena River system were radio-tagged to determine their rates of movement through commercial salmon fisheries near the river mouth. The run timing of individual spawning populations was also investigated as were riverine migrations through sport fisheries on the mainstem Skeena. Steelhead (n=140) were collected using a commercial seine vessel and either radio-tagged (n=55) or spaghetti tagged (n=80). Radio-tagged steelhead were monitored from aircraft or with stationary receivers as they entered freshwater. Additional data were obtained by examining the date and location of capture of tagged fish intercepted by the commercial fleet. The net rate of travel (km/day) towards the Skeena River was calculated from the times and distances between tagging and recapture locations. Only 39 (70.9% of total) radio-tagged steelhead were eventually accounted for of which 6 were reported caught in the commercial fishery. The average rate of travel from points of tagging to the river was approximately 8 km/day. It was estimated that steelhead took 12 days to migrate through the entire commercial fishing area. Travel through the river mouth where the highest gillnet catches of steelhead occur, took 2 - 3 days. Rates of movement in the Skeena mainstem averaged 10.4 km/day for the area downstream of the Zymoetz River, and 20.2 km/day between the Zymoetz River and Bulkley River. Individual fish travelled as quickly as 32.0 km/day in the upper Skeena River beyond its confluence with the Bulkley. The study failed to outline differences in the run timing of separate stocks within the Skeena River drainage, largely because of limited sample sizes and the fact nearly all radio tags were disbursed over a two day period.
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Report Type
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Fish and Aquatic Habitat Information |
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Subject
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Fish Species - Steelhead - Oncorhynchus mykiss |
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Region - Skeena |
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Fish and Fish Habitat - Stock Assessment |
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Watershed Groups - 400 - Skeena River |
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