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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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The upper Sustut River steelhead population was
enumerated from July 31 to October 1, 2003, using a floating PVC fence.
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Author: Diewert Consulting Services
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Old Reference Number: sk136
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Old Reference System: Skeena Fisheries Report
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Date Published: Apr 2004
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Report ID: 2642
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Audience: Government and Public
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The upper Sustut River steelhead population was
enumerated from July 31 to October 1, 2003, using a floating PVC fence. The first steelhead migrated past the fence on August 3 and by September 30, a total of 1,115 steelhead had been counted moving upstream. The fence count to September 30 is the standardized value used for all inter annual comparisons and stock trend analyses. An additional 50 steelhead were observed downstream of the fence and three migrated past the fence on October 1 making the estimated spawning escapement to the upper Sustut River 1,168 steelhead. The 2003 fence count was the highest on record and was above the estimated carrying capacity for the upper Sustut system for steelhead. Between July 30 and October 1, a total of 1,106 chinook salmon, 4,992 sockeye salmon, 119 coho salmon, 21 bull trout, 12 resident rainbow trout and 55 Rocky Mountain whitefish were counted through the fence. Nine steelhead tagged at the upper Sustut River fence in 2001 were recaptured in 2003 indicating that a minimum of 1.2 percent of the 2001 run returned as potential repeat spawners. Both the percentage of repeat spawners and the
average growth between spawning events were below the long term average. No steelhead have been tagged at the fence since 2001. The ratio of female to male steelhead was 1.39 to 1. A total of 12.1 percent of all steelhead sampled at the fence for length and or scales exhibited gillnet marks.
This falls in the middle of historical values, which have ranged from 2.0 to 23.0 percent and averaged 11.5 percent since 1992. Female steelhead exhibited a higher gillnet mark rate than males.
With the addition of the 2003 data point, the upper Sustut River steelhead fence count was no longer significantly correlated with the cumulative Tyee
Test Fishery index to August 10.
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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 - 490 - Sustut River |
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