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Bio-Economic Model of Genomic Technologies as a Fishery Management Tool: Interior Fraser Coho case study Public Deposited

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  • Even in the absence of commercial fishing, Coho salmon (Onchorhynchus kisutch) originating from the Interior Fraser River (IFR) watershed have yet to recover from the low returns experienced since 1992. Coho are in a low productivity regime in which the number of recruits per spawner (R/S) averages around one, coupled with a low rate of marine survival and exploitation from bycatch and U.S. interceptions. New fishery management tools based on genomic technology have been developed and may soon be implemented to address the low returns of IFR Coho. Parentage based tagging (PBT) and genomic stock identification (GSI) are used as a way to identify the origin and age of individuals caught in a mixed-stock fishery. These tools are becoming vital for decisions on the timing and fishing areas for salmon, and to minimize bycatch of endangered stocks. Additionally, these genomic technologies provide insight into proper enhancement rearing practices and improve the ability of hatchery fish to survive to adulthood with minimal genetic and ecological impacts. Here, we present how these genomic technologies can provide a more accurate and cost-effective alternative to the coded-wire tag (CWT) recovery system in place today. By minimizing bycatch and improving the efficacy of hatchery enhancement efforts, IFR Coho abundance could grow back to levels capable of commercial fishing and allow for economic opportunities within the coastal communities of southern British Columbia.
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  • Seattle, Washington, USA
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