GROWTH OF CHANNEL CATFISH IN RESPONSE TO ORAL TRIIODOTHYRONINE AND KETOTESTOSTERONE.

C. D. Cochran, K.B. Davis, B.A. Simco and N.C. Parker. Ecological Research Center, Department of Biology, Memphis State University, TN, and USDI-FWS, Southeastern Fish Cultural Lab., Marion, AL.

Fingerling channel catfish were fed ketotestosterone (KT) at 2 mg/kg or trilodothyronine (T3) at 10 mg/kg for 10 weeks either daily, on alternate days, or the two hormones alternating daily. Only two treatments differed from controls. Fish fed KT on alternate days were significantly heavier and longer when compared to controls. Feeding T3 daily resulted in significantly smaller fish than controls. Condition factor, mesenteric lipid and muscle lipid content were not affected by any treatment. Supported in part by USDI-FWS 14-16-0009-89-929.