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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 August 1, 1999 to September 30, 1999 for the eighth consecutive year.
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Author: British Columbia Conservation Foundation
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Old Reference Number: sk126
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Old Reference System: Skeena Fisheries Report
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Date Published: Mar 2000
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Report ID: 2626
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Audience: Government and Public
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The upper Sustut River steelhead population was
enumerated from August 1, 1999 to September 30, 1999 for the eighth consecutive year. A floating PVC fence located approximately 500 m. upstream
of the confluence of the Sustut River with Moosevale Creek, was used for enumeration. 731 adult steelhead were passed through the fence between August 18 and September 30. An additional 169 steelhead were counted downstream of the fence to the tail out of the Moosevale
Creek confluence pool on September 29. Accounting for 4 steelhead that migrated through the fence after the visual survey, the total estimated steelhead escapement to the upper Sustut River was 896 fish. The 1999 escapement was more than twice the number of fish required for maximum sustainable yield, and was 86 percent of the estimated carrying capacity for the Upper
Sustut system. The steelhead mortality rate due to handling at the fence was 0.3 percent. In 1999, 8.5 percent of steelhead had gillnet marks. The percentage of gillnet marked fish peaked at 11.4 percent on September 12 and 8.5 percent of
the total run had gillnet marks. Between July 29 and September 30, a total of 609 chinook salmon, 221 sockeye salmon, 30 coho salmon, 7 bull trout, 5 resident rainbow trout and 10 Rocky Mountain whitefish were counted passing upstream of the fence. The first steelhead arrived at the fence on August 18 and by September 17, 50 percent of steelhead had moved upstream. In the one week period between September 14 and 20th more than
52 percent of the run passed the fence. Female steelhead run timing lagged behind males by one day. Eighteen previously tagged upper Sustut steelhead were recaptured in 1999. Fifteen were
repeat spawners from 1997 that were counted at the fence in 1999. Two 1997 Sustut fence tags were recovered in a First Nations fishery on the Skeena River just upstream of the Kispiox River mouth. The last fish had a Sustut fence tag, but the tag was lost in the trap box before it was recovered. Male steelhead were significantly longer than female steelhead. In 1999, 6.1 percent of male steelhead and 9.9 percent of female steelhead passing the fence were gillnet marked. The forklengths of gillnet marked and unmarked fish were similar for each sex.
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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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