Forecasting Abundance of Quality‐Size Yellow Perch in Indiana Waters of Lake Michigan

摘要: Abstract Because the yellow perch Perca flavescens is a valuable sport and commercial species in southern Lake Michigan, forecasts for abundance of quality-size fish would be beneficial. We analyzed time series annual index trawl catch per unit effort (CPUE) order to identify model that could used forecasting. Relative stock-size (≥130 mm) (≥200 Indiana waters Michigan varied by about two orders magnitude from 1975 1996 declined low level during 1990s. Cross-correlation was strong positive relation between CPUE (S) year t (Q) + 2. This described linear model, √Q t+2 = 2.68 0.00572·S , due survival growth sub-quality–stock-size The quality predicted closely approximated trend observed values. relative yell...