North Pacific Anadromous Fish Commission

Technical Report 15

Table of Contents

Comparison of Coded-wire Tagging with Parentage-based Tagging and Genetic Stock Identification in Large-scale Coho Salmon Fisheries Applications in British Columbia, Canada

Authors:
Terry D. Beacham, Colin Wallace, Kim Jonsen, Brenda McIntosh, John R. Candy, David Willis, Cheryl Lynch, Jean-Sébastien Moore, Louis Bernatchez, and Ruth E. Withler

Abstract Excerpt:
Since the late 1990s, all coho salmon (Oncorhynchus kisutch) released from many hatcheries in southern British Columbia (BC), Washington, and Oregon have received an adipose fin clip (termed mass marking) in order to facilitate mark-selective fisheries intended to harvest hatchery salmon only, with most clipped individuals carrying no coded-wire tag (CWT). This approach has resulted in reduced exploitation of naturally-spawned coho salmon, especially in sport fisheries, but the presence of many adipose-clipped salmon without a CWT has impaired the efficiency of CWT recovery. In spite of implementation of an electronic tag detection system to pre-screen a portion of the commercial catch to identify salmon with a CWT, the processing of many heads without a CWT from voluntary recreational recoveries and the increasing costs of CWT application and recovery have caused degradation of the information obtained from the current Canadian coho salmon assessment program.

*This is the first paragraph of an extended abstract. Download the full abstract below.

DOI:
https://doi.org/10.23849/npafctr15/173.175.

Citation

Beacham, T.D., C. Wallace, K. Jonsen, B. McIntosh, J.R. Candy, D. Willis, C. Lynch, J. Moore, L. Bernatchez, and R.E. Withler.  2019.  Comparison of coded-wire tagging with parentage-based tagging and genetic stock identification in large-scale coho salmon fisheries applications in British Columbia, Canada.  N. Pac. Anadr. Fish Comm. Tech. Rep. 15: 173–175.  https://doi.org/10.23849/npafctr15/173.175.