Yellow Perch in South Dakota: Population Variability and Predicted Effects of Creel Limit Reductions and Minimum Length Limits

摘要: Abstract We collected annual gill-net samples of yellow perch Perca flavescens in six South Dakota lakes over 4–5 years. also simulated the effects reductions daily creel limits for (i.e., from 25 fish/angler to 5, 10, or 15 fish/angler) and use minimum total length (229 254 mm). Population indices varied widely among years within extent that any individual year were largely uninformative. Creel surveys indicated few anglers typically achieved a limit perch. Except Waubay Lake, lowering 5 would be necessary achieve harvest 25% more most fisheries we examined. Minimum projected improve size age structure, but often exceeded 50% yield declined only slightly increased (by ≤13%). Yellow these had much their full growth potential by time they reach...