Enriched rotifers versus copepods as live prey for Atlantic bluefin tuna (Thunnus thynnus L.) larvae
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AuthorsBetancor, Mónica; Sprague, Matthew; Ortega-García, A. (Aurelio); de-la-Gándara, F. (Fernando); Tocher, Douglas R.; Mourente, Gabriel
In conclusion, and in agreement with our previous trial, the present study showed that copepods were a superior live prey for first feeding ABT larvae compared to enriched rotifers, as indicated by the higher growth and flexion in- dex achieved by larvae fed COP. All dietary treatments in the present study ap- peared to satisfy LC-PUFA requirements as no significant effects were observed in the expression of the genes related to the homeostasis and biosynthesis of the- se compounds (ppara, srebpl , lxr, rxr, fads2d6, and elovl5). Addition of organic selenium and a-tocopherol did not enhance larval performance, probably indicat- ing that the levels contained in copepods (0.4µg.g-1 and 170mg.kg-1, respective- ly) were sufficient to fulfil nutritional requirements.
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