Tag Archives: Purse seine

Analysis of existing CPUE data from Canadian Commercial ITQ fisheries for the possible integration into run-size models for Fraser River sockeye and pink salmon

This project proposes to analyse the relationship between sockeye and pink salmon abundance and existing CPUE data from Canadian purse seine ITQ fisheries, years 2010-2014. This will entail: 1) obtaining catch data by set and location from individual purse seiners in Area 12 and comparing with indices of abundance by area. 2) Examining the special case situation in Area 29 where ITQ seiners have fished on delaying Fraser River sockeye (2010, 2014) and pink salmon (2013). 3) Exploring evidence for density dependence catchability in the ITQ fishery dynamics. 4) In consultation with PSC Staff, incorporate the above (if useful) within a Bayesian hierarchical methodology. 5) Review compliance with the requirements identified in the Kowal Letter to the Fraser River Panel (2002) and also with the Run-size estimation workshop (2003). And finally, 6) Develop a plan for additional sampling opportunities for the Panel’s consideration for implementation in future years.


Mixed Stock Analysis of U.S. Districts 101, 102, and 103 Sockeye Seine Fisheries

Annual stock-specific run reconstructions (catch plus escapements) are required to accurately estimate relative contribution of each stock caught in Northern Boundary Area fisheries. Estimates of national origin of contributing stocks provides the most reliable information currently available to complete these run reconstructions, and are used to evaluate stock-specific productivity and revise pre-season forecasts. While the catch of Nass and Skeena sockeye salmon is only subject to treaty harvest-sharing annexes in the Alaska District 101 gillnet and Alaska District 104 purse seine fisheries, the harvest of these stocks in all fisheries, and their escapements, needs to be estimated in order to calculate the total run and the percentage caught in the annexed fisheries.
This project will complete genetic stock identification (GSI) analysis on sockeye salmon tissue samples collected from the 2016 commercial purse seine fisheries in Districts 101, 102, and 103 in Southeast Alaska. This project is a complement to the ongoing project at the Auke Bay Laboratory for Northern Boundary Area sockeye salmon GSI in Districts 101 and 104, and continuing work by DFO in Areas 3, 4, and 5; and will allow for complete assessment of the catches of Nass and Skeena sockeye salmon in all major Northern Boundary Area fisheries for run reconstructions. Estimates will be provided for up to 3 time strata in District 101, up to 3 time strata in District 102, and over the entire season in District 103, for a total of 1,500 samples analyzed.