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- W2031920578 abstract "We developed a new approach for directly quantifying selection parameters for fishing gear using a dual underwater video camera apparatus and employed the method to estimate gill net retention probability for walleye (Sander vitreus). The method allows observation of fish behavior around fishing gear and estimation of the absolute probability of fish encountering, contacting, or being retained by the gear. We demonstrated the applicability of this method by quantifying the probability that walleye were retained in multifilament nylon gill nets after contacting the nets. Walleye with total lengths 2.49 times the perimeter of the mesh were most likely to be retained, and retention probability peaked at 0.60 (95% confidence interval 0.410.90), meaning 40% of walleye that were the ideal size for a given mesh escaped after contacting the net. Our empirically derived retention curve exhibited a steep ascending limb and strong positive skew because of walleye morphology and the tendency for larger walleye to be captured by tangling. Most walleye that avoided capture did not fully enter the mesh or backed out of the mesh after they became temporarily wedged or tangled." @default.
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- W2031920578 date "2004-02-01" @default.
- W2031920578 modified "2023-10-02" @default.
- W2031920578 title "Using underwater video to directly estimate gear selectivity: the retention probability for walleye (<i>Sander vitreus</i>) in gill nets" @default.
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- W2031920578 doi "https://doi.org/10.1139/f03-166" @default.
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