Effect of dietary ascorbic acid vitamin supplements on growth and survival of striped bass, Morone saxatilis, and inland silverside, Menidia beryllina, larvae

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Larvae of striped bass (12 d old) and silversides (14 d old) were fed for 4 weeks on marumerized diets containing 100 mg/kg ascorbic acid equivalency as ascorbic acid-2-sulfate (AS-2-SO4), ethylcellulose coated ascorbic acid (ECAA), ascorbic acid-2-polyphosphate (Stay-C; ST-C), and ascorbic acid-2-monophosphatc (MPO4). Survival and growth of the fish were compared with those of fish fed a control diet with no supplemental ascorbic acid (30 mg/kg background level only) and fish fed exclusively on live Anemia nauplii. Live nauplii yielded better growth and survival for both species. Striped bass survival rates ranged from 33 to 47% for all the ascorbic acid diets, including the control, except that survival on the AS-2-SO4 was significantly (P<0.05) less than rest of the dietary treatments. No growth differences were detected among the ascorbic acid diets but growth on all the diets was significantly lower than that of fish fed on live Anemia nauplii. Silverside larvae exhibited no growth or survival differences among any ascorbic acid supplemented, diet without ascorbic acid diets, nor between those diets and live food. The results indicate that all the ascorbic acid vitamers except AS-2-SO4 can be used as an alternate source of vitamin C for striped bass and inland silvcrsides larvae. These studies further indicate that larval stages of these two fish species do not require ascorbic acid supplementation when raised/cultured on practical diets.

Publication Title, e.g., Journal

Pakistan Journal of Zoology





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