M. G. McElroy

A 2-phase study of 6 variations of hoop nets was conducted in 3 Louisiana lakes to determine if mesh size or the addition of escape rings could be used to regulate the catch of channel catfish (Ictalurus punctatus) in hoop nets. Commercial and recreational fishermen in Louisiana must abide by a 279.4-mm minimum total length restriction during a year long season. A total of 10,226 channel catfish were caught in 1,033 net days during both phases of the study. In Phase 1, 25.4-, 28.6-, and 31.8-mm (bar) mesh hoop nets were fished. For all channel catfish total lengths, the catch per unit...

Diet composition was investigated in 3 channel catfish (lctalurus punctatus) populations in southeastern Louisiana, 2 of which were characterized by slow growth and reduced length at maturity. Multivariate analyses revealed that diets of catfish exhibiting slow growth were predominantly composed of marine prey. particularly engraulids, Corophium sp., and Penaeus sp., and were superior in quantity, diversity, and apparent nutritional value compared to diets of faster growing catfish from the Atchafalaya Basin. Slow growth and early maturity at reduced lengths did not appear to be forage-...