Abstract

Abstract This project was designed to allow adjustment in length-frequency calculations for walleye (Stizo-stedion vitreum), white bass (Morone chrysops), and gizzard shad (Dorosoma cepedianum), based on the efficiency of the gill-net mesh size. Such adjustments in length frequency have effects on calculation of Proportional Stock Density (PSD) and Relative Stock Density (RSD). Mesh-size efficiencies of the standard gill-net complement used by the Kansas Fish and Game Commission were determined by plotting absolute catch of these three species in 25-, 38-, and 64-mm mesh (bar measure) monofilament gill nets. Catches in 19-, 32-, and 51-mm nets also were plotted to ensure that fish were available at lengths in the valleys between the peaks (effective catch) of the standard complement catch. An adjustment line was plotted from peak to peak of absolute catch in the three mesh sizes (adjusted for effort). Correction factors up to this adjustment line were developed by centimeter length groups for all three sp...

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