Vitamin C in Pond Diets for Channel Catfish
- 1 March 1978
- journal article
- research article
- Published by Oxford University Press (OUP) in Transactions of the American Fisheries Society
- Vol. 107 (2) , 321-325
- https://doi.org/10.1577/1548-8659(1978)107<321:vcipdf>2.0.co;2
Abstract
Channel catfish (Ictalurus punctatus) were grown from fingerlings to harvestable size in earthen ponds at densities of 197 and 394 fish per 400‐m2 pond (49 and 98 per 100 m2) and 494 fish per 200‐m2 pen (247 per 100 m2) by intensive feeding of diets with or without supplemental vitamin C. The fish did not require vitamin C in their diets for normal growth or to prevent gross signs of the broken back syndrome at the two lower densities; however, at the highest density growth was 28% less while 23% of the fish showed external signs of the broken back syndrome. Percentages of collagen in bone and vitamin C in liver were statistically lower (P < 0.05) in fish fed the diet deficient in vitamin C. Serum alkaline phosphatase activity, blood hematocrit, and anterior kidney vitamin C level were not influenced by the diets. Feed processing losses of vitamin C were 18 to 27% and 46 to 62% for pelleting and extrusion, respectively. The half‐life of vitamin C in stored catfish feeds was 2.6 to 2.9 months.This publication has 1 reference indexed in Scilit:
- A METHOD FOR THE RAPID DETERMINATION OF ALKALINE PHOSPHATASE WITH FIVE CUBIC MILLIMETERS OF SERUMPublished by Elsevier ,2021