Comparative studies in effcts of using decapsulated cysts of Artemia urmiana in feed on larve stage of Salmo tratta caspius
The present study investigated the effects of replacing decapsulated cysts of Artemia urmiana in feed on larvae stage of Salmo trutta caspius in growth and survival indices. Experiment with six food groups treatment with 1: Control diet (without decapsulated Artemia cysts), treatment 2: Decapsulated Artemia cysts diet with 25% and 75% concentrate feed, treatment 3: Decapsulated Artemia cysts diet with 50% and 50% concentrate feed, treatment 4: Decapsulated Artemia cysts diet with 75% and 25% concentrate feed, treatment 5: Decapsulated Artemia cysts diet with 100%, treatments to 1 gram weight. In this experiment, the sequences of three parts, each containing 1500 larvae 120 with an average of 120+25 mg were used. During the test period the various parameters including weight gain rate larvae (GR), special growth rate (SGR), survival rate (SR), feed rate (FR) Feed conversion ratio (FCR) were analyzed. The results showed that among different groups, treatment 2 with 0.64% had the worst condition in terms of feed conversion ratio among treatments were tested. The results showed that the specific growth rate of treatments 2 with 0.55% had the best and treatment 4 with 0.34% had the worst condition. Effective growth rate in treatment 2 with 0.26% showed the best and treatment 5 with 0.17% showed the worst. Treatment 2with 154.31 the best and treatment 1 with 130.85 the worst effective feeding index. The highest average daily growth observed in treatment 2 and the lowest was observed in treatment 5. The highest obesity index was observed in treatment 2 with 0.96 and the lowest obesity was in treatment 5 with 0.85. In terms of survival, treatment 4 with 99.91% had the best result and treatment 5 with 99.62% had the worst result. According to the results of the present study, replacing 25% decapsulated Artemia cysts can be effective and useful in developing the most growth and survival indices of rainbow trout larvae.
| Main Authors: | , , , , , , , , , , |
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| Format: | Report biblioteca |
| Language: | Persian |
| Published: |
Iranian Fisheries Science Research Institute
2018
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| Subjects: | Decapsulated urmiana Artemia cysts, Larvae salmon Caspian Sea, larvae weight gain (GR), Special growth rate (SGR), Survival rate, Salmo trutta caspius, Artemia urmiana, |
| Online Access: | http://hdl.handle.net/1834/14112 |
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