The Salmon Purse Seine - Competition And Information Among
By Max Ledbetter, Sat Dec 10th
In British Columbia, Canada, salmon purse seiners line up atfishing access points, forming well defined queues. These queueswere measured over time, using a one-dimensional recordingscale. Sixty-one overflights of Johnstone Strait and QueenCharlotte Strait were attempted; 51 flights were completed.
Two models were presented for exploitation rates in relation toqueuing patterns. The overflight model was fit to the line-updistributions. One underlying assumption was that the skipperspossessed fairly accurate information regarding the distributionof catches (analysis of variance methods utilizing skippers'logbook data showed that line-up lengths reflected catch rates).The model fit well and the parameter estimates reflectedanecdotal and statistical information about fish behavior. Theexploitation rates saturated at an effort level of 100 vessels(whereas the maximum effort observed was 363 boats) andindicated that (at saturation)
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