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Enrichment of Artemia nauplii with essential fatty acids and vitamin C: effect on rainbow trout (Oncorhynchus mykiss) larvae performance | ||
| Iranian Journal of Fisheries Sciences | ||
| مقاله 2، دوره 10، شماره 4، دی 2011، صفحه 557-569 اصل مقاله (630.43 K) | ||
| شناسه دیجیتال (DOI): 10.22092/ijfs.2018.114163 | ||
| نویسندگان | ||
| P. Akbary* ؛ S. A. Hosseini؛ M. R. Imanpoor | ||
| چکیده | ||
| The effect of essential fatty acids (EFA) and vitamin C-enriched Artemia nauplii on growth, survival, and resistance to temperature (high) stress in rainbow trout larvae reared in tanks were investigated. The larvae (average weight 120.43mg±13.5) were fed 6 times daily starting at the onset of exogenous feeding for 1 week. Triplicate groups of fish were offered one of four treatments (1) commercial starter food for rainbow trout، (2) newly hatched Artemia nauplii (unenriched) ،(3) highly unsaturated fatty acid (HUFA) + vitamin C-enriched Artemia nauplii and (4) combination of 10 % HUFA+ vitamin C enriched nauplii and commercial starter food. After 1 week, all groups of fish were switched to the commercial diet for an additional period of 3 weeks. Statistical analysis of growth after the first week and at the end of the experiment, showed that growth of larvae in various treatments was significantly different (P < 0.05). After 4 weeks, the larvae in treatment 3 with the average weight of 657.50 ± 57.93 mg had the highest body weight (P < 0.05). The highest percentage of survival (96%) was observed in treatment 3 (P < 0.05). Proximate compositions of trout larvae after one week feeding with experimental diets showed that the protein in the larvae of treatments 3 and 4 was significantly different compared to other treatments (P < 0.05). The best result of resistance to temperature (up to 24ºC) was observed in larvae reared on treatment 3 with 91.34 ± 1.52 percent (P < 0.05). | ||
| کلیدواژهها | ||
| Essential fatty acid؛ vitamin C؛ Oncorhynchus mykiss؛ stress resistance؛ growth and survival | ||
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