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Fall‐Winter Growth of Young Channel Catfish in Response to Quantity and Source of Dietary Lipid
Author(s) -
Gatlin Delbert M.,
Stickney Robert R.
Publication year - 1982
Publication title -
transactions of the american fisheries society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.696
H-Index - 86
eISSN - 1548-8659
pISSN - 0002-8487
DOI - 10.1577/1548-8659(1982)111<90:fgoycc>2.0.co;2
Subject(s) - catfish , ictalurus , tallow , fish oil , soybean oil , food science , fish <actinopterygii> , biology , lipid accumulation , fatty acid , chemistry , zoology , biochemistry , fishery
Age‐0 channel catfish Ictalurus punctatus demonstrated no significant growth differences over 20 weeks during fall and winter when fed, in indoor tanks, semipurified diets containing 6, 8, 10, 12, or 14% lipid in the form of beef tallow, soybean oil, or fish oil. Fish on the 10% lipid diets showed a tendency toward best growth within each dietary lipid group but no well defined optimum lipid level was found. Carcass lipid percentages, and fatty acid patterns were similar among fish offered diets containing the same lipid source, regardless of the percentage of lipid in the diet. Striking differences in the patterns of such fatty acids as 14:0, 18:1ω9, 18:2ω6, 18:3ω3, 20:5ω3, 22:5ω3, and 22:6ω3 reflected dietary lipid sources.