ENRICHMENT OF ARTEMIA NAUPLII WITH ESSENTIAL FATTY ACIDS AND VITAMIN C: EFFECT ON RAINBOW TROUT (ONCORHYNCHUS MYKISS) LARVAE PERFORMANCE

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AKBARY P.; HOSSEINI S.A.; IMANPOOR M.R.

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Journal: Iranian Journal of Fisheries Sciences Year:2011 | Volume:10 | Issue:4 Page(s): 557-569

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Title

ENRICHMENT OF ARTEMIA NAUPLII WITH ESSENTIAL FATTY ACIDS AND VITAMIN C: EFFECT ON RAINBOW TROUT (ONCORHYNCHUS MYKISS) LARVAE PERFORMANCE

Author(s)

AKBARY P. | HOSSEINI S.A. | IMANPOOR M.R. | Issue Writer Certificate

Keywords

ESSENTIAL FATTY ACIDQ2

VITAMIN CQ3

ONCORHYNCHUS MYKISSQ2

STRESS RESISTANCEQ3

GROWTH AND SURVIVALQ2

Abstract

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).

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