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概要

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The preceding paper showed that the mesh selectivity, i.e. relative efficiency, of gillnet was expressed as a function of the ratio of mesh size m to body length l in certain ranges of mesh size and length, and that the application of the above method to McCOMBIE and FRYs, and ISHIDAs data gave different master curves according to the groups of smaller and greater length ranges. In order to account for these phenomena, an analysis is made with REGIERand ROBSONs data on the comparative fishing experiments for lake whitefish, Coregonus clupeaformis. It is seen that the mesh selectivity of gillnet for whitefish is approximately presented as a function of (m-m0)/(l-l0) in certain ranges of mesh size and length, where m0 and l0 are constants. The mesh selectivity curve determined by the present method is in an agreement with that obtained by REGIER and ROBSONs one.
日本水産學會の論文