| |
Report: Enumeration of Adult Steelhead in the Upper Sustut River 2000
| Report Documents
|
|
|
| |
| Map Plotfiles
|
-
No files of this type available
|
| |
| Data Files
|
-
No files of this type available
|
| |
| Digital Map Files
|
-
No files of this type available
|
| |
| Image Document
|
-
No files of this type available
|
| |
| Video Files
|
-
No files of this type available
|
| |
|
All Documents
|
|
|
| Contact
|
|
-
If you have any questions on the information presented, or require additional report data or attachments, please contact the Report Contact
|
|
|
The upper Sustut River steelhead population was
enumerated from July 31 to September 30, 2000, using a floating PVC fence.
|
Author: Diewert Consulting Services
|
Old Reference Number: sk128
|
Old Reference System: Skeena Fisheries Report
|
Date Published: Dec 2000
|
Report ID: 2628
|
Audience: Government and Public
|
The upper Sustut River steelhead population was
enumerated from July 31 to September 30, 2000, using a floating PVC fence. The first steelhead migrated past the fence on August 8 and by September 30, a total of 377 steelhead had been tagged and released upstream. This value was
defined as the upper Sustut River steelhead index for 2000. An additional 85 steelhead were observed downstream of the fence on September 28. Between this final visual survey and the last day of fence operation on September 30, 14 steelhead migrated past the fence making the estimated spawning escapement for upper Sustut steelhead 448 fish. The population index for 2000 was the
lowest on record and only slightly more than half of the long term average while the spawning escapement was 43 percent of the estimated carrying capacity for the upper Sustut system. Between July 31 and September 30, a total of 896 chinook salmon, 476 sockeye salmon, 12 coho salmon, 11 bull trout, 2 resident rainbow trout and 15 Rocky Mountain whitefish were counted passing upstream of the fence. Four steelhead tagged at the upper Sustut River fence in 1998 were
recaptured in 2000 indicating that a minimum of 0.4 percent of the 1998 run returned as potential repeat spawners. Both the percentage of repeat spawners
and the growth between spawning events were less than the long term average. The ratio of female to male steelhead was 1.64 to 1. The average fork
length of males and females was 82.7 cm and 74.1 cm, respectively. A total of 14.1 percent of all steelhead handled at the fence exhibited gillnet marks. The cumulative gillnet mark rate remained stable during the run but when pooled by week greater variability was evident with peaks occurring during statistical weeks 8-3 and 9-2. Females showed a higher gillnet mark rate than males. The upper Sustut steelhead population index continued to be positively correlated with the cumulative Tyee test fishery index to August 10. However, the inclusion of the 2000 data point resulted in much greater spread in the data and reduced the reliability of the predictive relationship.
|
Report Type
| |
Fish and Aquatic Habitat Information |
| |
Subject
| |
Fish Species - Steelhead - Oncorhynchus mykiss |
| |
Region - Skeena |
| |
Fish and Fish Habitat - Stock Assessment |
| |
Watershed Groups - 490 - Sustut River |
| |
|
|
|
|
Warranty Disclaimer
This information is provided as a public service by the Government of British Columbia, Box 9411, Victoria, British Columbia, Canada V8W 9V1.
This Web site and all of the information it contains are provided "as is" without warranty of any kind, whether express or implied. All implied warranties, including, without limitation, implied warranties of merchantability, fitness for a particular purpose, and non-infringement, are hereby expressly disclaimed.
Limitation of Liabilities
Under no circumstances will the Government of British Columbia be liable to any person or business entity for any direct, indirect, special, incidental, consequential, or other damages based on any use of this Web site or any other Web site to which this site is linked, including, without limitation, any lost profits, business interruption, or loss of programs or information, even if the Government of British Columbia has been specifically advised of the possibility of such damages.
|
