Ministry of Environment
EcoCat:The Ecological Reports Catalogue
EcoCat Image

Report: Assessment of the 2009 outmigration of Coho salmon smolts from the Englishman River

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

  • No files available


  • If you have any questions on the information presented, or require additional report data or attachments, please contact the Report Contact

The current program contributes to a series of studies that has assessed the overall coho smolt production in the Englishman River and quantified the portion originating in constructed and natural off-channel habitats. The 2009 coho smolt outmigration from the Englishman River was assessed through a mark-recapture program conducted between April 20 and June 11

Author:  Taylor, J.A.; Wright, M.; J.A. Taylor and Associates Ltd.;Fisheries and Oceans Canada

Date Published:  Aug 2010

Report ID:  23751

Audience:  Government and Public

Coho juveniles, migrating from the Clay Young side channel, were enumerated at a counting fence and a number of these fish were marked on each of 8 occasions, representing 5 temporal strata, during the outmigration. The movement of smolts from the Englishman River, including marked fish, was monitored using a rotary screw trap (RST) fishing in the lower river. The overall efficiency of capture during the study was 6.7%, higher than that recorded at this site in the previous year of this program. Total smolt production in the Englishman River system in 2009 was derived using a stratified Petersen estimator, with pooling of individual strata estimates due to significant temporal variation in capture probabilities. The estimate for the Englishman system was 85,467 (95% CI 78,241- 92,692). The count of coho juveniles originating from the side channel, adjusted to incorporate that portion not sampled by the counting fence, was 36,100 individuals. This represents an unprecedented contribution of 42% of total production from the side channel. This project was funded by the Oceans, Habitat and Enhancement Branch of Fisheries and Oceans Canada and the BC Living Rivers Program

Report Type
  Fish and Aquatic Habitat Information
  Fish Species - Coho Salmon - Oncorhynchus kisutch
  Region - Vancouver Island
  Fish and Fish Habitat - Stock Assessment
  Watershed Groups - 920 - Vancouver Island (East) Rivers

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.