Mesh Selection in Herring Gill Nets

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Abstract
A method described by Holt (1957) to determine the effect of mesh selection in gill nets, has been applied to a material of herring collected in Newfoundland waters in 1957–58.The method requires simultaneous operation of two or more nets, differing slightly in mesh size, but identical in every other respect.The selection curve for herring nets was found to be fairly sharply peaked and slightly skewed to the right.Simultaneous samples of catches taken by three different mesh sizes and adjusted accordingly for the effect of mesh selection did not, in general, differ significantly in length composition over the main range of length distribution.

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