QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Purchase Article View Shopping Cart Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Stickney, R. R. Articles by Andrews, J. W. Search for Related Content PubMed Articles by Stickney, R. R. Articles by Andrews, J. W.

Combined Effects of Dietary Lipids and Environmental Temperature on Growth, Metabolism and Body Composition of Channel Catfish (Ictalurus punctatus)¹

Skidaway Institute of Oceanography, 55 West Bluff Road, Savannah, Georgia 31406

A study of the interaction of five environmental temperatures (20, 24, 26, 30 and 33°), and three types of dietary lipids (beef tallow, safflower oil, and menhaden oil) on the growth and body composition of channel catfish, Ictalurus punctatus, indicated that maximum growth was obtained at 30° for fish fed each lipid supplement for a 70-day experimental period. At all temperatures, higher gains were obtained from beef tallow and menhaden oil than safflower oil supplements; likewise, lower food conversion rates were obtained from beef tallow and menhaden oil. The lipid level in fish carcasses increased with increasing temperatures up to 30° for all dietary supplements. At the optimum temperature for growth (30°), fish fed beef tallow contained less lipid than those fed the other supplements. The fatty acid composition of the diets was reflected in both liver and carcass lipids.

KEY WORDS: • lipids • environmental temperature • catfish

¹ Adapted from part of a dissertation submitted by Robert R. Stickney in partial fulfillment of the requirements for the Doctor of Philosophy degree at the Department of Oceanography, Florida State University, Tallahassee, Florida.

Manuscript received 12 April 1971.