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Report: Enumeration of Adult Steelhead in the Upper Sustut River 1993
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This report summarizes enumeration of adult steelhead in the Upper Sustut River system during the 1993 field season. The report is 36 pages long and contains several area maps.For a report summary see the long description.
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Author: Saimoto, R.S.
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Old Reference Number: sk87
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Date Published: Feb 1994
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Report ID: 1700
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Audience: Government and Public
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The Upper Sustut River steelhead stock was enumerated in the fall of 1993 for the second consecutive year. The enumeration methods
included the use of the Johanson Creek and Upper Sustut migration fences and snorkel counts for 5 km below the fences to the Moosevale Creek junction. Seven total counts of steelhead at the Upper Sustut River were accomplished from September 3rd to 26th.Results showed a decrease in new arrivals toward the end of September and estimated the Upper Sustut stock to consist of 476 steelhead in the fall of 1993. The first steelhead arrived in the Upper Sustut River in early August and continued to aggregate in the 1.5 km section of river below the Johanson confluence through most of September. Steelhead moved up the Sustut River through the Sustut fence at a low and inconsistent rate. Only 26 steelhead (11 males, 15 females) moved through the Sustut fence toward Sustut Lake. However, steelhead moved up Johanson Creek through the Johanson fence at a comparatively steady rate. A total of 182 steelhead (65 males, 117 females) moved through the Johanson fence toward Johanson Lake. When fences were removed on September 28th, there were still 276 steelhead below the fences. The final migration of these steelhead appeared to be delayed by extremely low discharge and possibly cool water temperatures that dropped below 4 C. I recommend that the Ministry of Environment continue to use the Upper Sustut River as a steelhead index stream and to work in coordination with the Department of Fisheries and Oceans to maintain practical and shared expenses to this project. The necessity for the operation of both fences is emphasized and it is suggested that future snorkel surveys include records of varying turbidity. It is also important that the Upper Sustut River is better monitored for an assessment of the impact of the Native fishery.
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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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