Habitat-based methods to estimate escapement goals for data limited Chinook salmon stocks in British Columbia, 2004
Skeena Salmon Program Escapement Goals, Models, stock assessmentAbstract Fisheries and Oceans Canada requires escapement goals for Chinook salmon (Oncorhynchus tshawytscha) stocks to evaluate their status and achieve objectives established by international agreements and domestic policy. Unfortunately the…
Evaluation of a mark-recapture procedure to assess the catchability rate of the Tyee test fishing gill-net
Skeena Salmon Program Models, stock assessmentEstimates of the Tyee test fishery catchability rate (i.e., the fraction of fish present which are captured during a fishing period) are combined with the number of steelhead captured to produce an estimate of total number of steelhead entering…
In-season indicators of run-strength and survival for northern British Columbia coho
Skeena Salmon Program Indicators, Models, stock assessmentAbstract In providing forecasts of run-strength and survival for the coho of northern British Columbia for 2000, Holtby et al. (2000) concluded that modest incidental catches of coho from the upper Skeena would not pose a significant risk of…
Retrospective analysis of harvest management performance for Bristol Bay and Fraser River sockeye salmon (Oncorhynchus nerka)
harvest management, ModelsAbstract Given current knowledge of mean stock-recruitment relationships and variation in past recruitment, yield of sockeye salmon (Oncorhynchus nerka) in Bristol Bay, Alaska, and Fraser River, British Columbia, might have been at least 100%-300%…
Considerations for Defining Reference Points for Semelparous Species, with Emphasis on Anadromous Salmonid Species Including Iteroparous Salmonids
Skeena Salmon Program Benchmarks, Biological Status, Life History, Models, Precautionary Approach Framework, Reference Points, Science Advice, stock assessment, Wild Salmon PolicyAbstract The document was prepared in support of an advisory process meeting to produce a technical guidance document to assist science practitioners responsible for developing the science elements of the Precautionary Approach (PA) framework.…
Utility of the steelhead harvest analysis in determining population trends and estimating escapement
Skeena Salmon Program habitat-based model, Models, SHA, steelhead harvest analysis, stock assessmentExecutive Summary Previous work has shown the Steelhead Harvest Analysis (SHA) to be biased because it is derived from mail out surveys, thus actual total catch and effort are difficult to determine. However, often it is assumed that catch-per-angler…
An exploratory investigation on possible approaches used to minimize terminal fishery impacts on the Skeena River steelhead population
Bycatch, Commercial Fishery, ModelsThis report investigates the utility of using a numerical simulation model to identify the frequency, timing and magnitude of fishery openings that can protect 80% of the steelhead run from terminal fishing impacts, with 90% certainty, while…
