S. H. Newton

Fingerling channel catfish (lctalurus punctatus) fed a 25% crude protein practical feed grew as well as or better than fingerlings fed a 35% crude protein practical feed in both Mississippi and Arkansas ponds during 2 consecutive winters. Fingerlings in Texas grew better on the 35% protein feed, although poor survival may have affected the results. The 35% protein feed provided no growth advantage to adult fish in Mississippi. Both feeds had equivalent energy to essential amino acid ratios and both contained 12% fish meal. There were minimal differences in feed conversion ratios and...

Rainbow trout (Salmo gairdneri) were fed 38% protein experimental diets which contained either sunflower or soybean meal. Fish were reared in 2 sets of tanks under controlled and ambient water temperatures during January-April 1982. With controlled water temperature, fish fed the sunflower meal diet had a significantly higher final weight, average gains and food conversion ratio. Under ambient water temperature conditions, trout fed sunflower meal diet also had significantly higher final weight and average gain than trout fed soybean meal diets. A 35% protein sunflower meal adequately...