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Apr 18, 2024
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May 5, 2024
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Abstract

Sea worms (Nereis sp.) is one of the natural diets that can increase the production of shrimp and fish eggs. DHA selco is a commercial product commonly used as an enrichment ingredient in natural diets to increase nutrient content. The purpose of the study was to find out the influence of sea worms (Nereissp) enriched with DHA selco on the growth and survival of cobia fish and to find out the best dose of DHA Selco used for enriching Nereis sp. The study use a complete randomized design (CDR) of the 4 treatments and 3 replications.Addition of DHA selco in different dose:A (without DHA selco), B (0.6 g./l DHA selco), C (0.9 g/l DHA selco), and D (1.2 g/l DHA selco). The maintenance is a period of 21 days with a solid spread of 50 heads/hapa. Frequency of feeding 3 times a day, by method at satiation. The results showed that the addition of DHA selco had a significant effect (P>0.05) onfeed utilization efficiency, relative growth rate, absolute length, biomass weight, protein efificiency ratio and SR. Feed utilization efficiency, relative growth rate value, absolute length, biomass weight, protein efficiency ratio and Survival rate were highest in D treatment (1.2 g/l DHA selco) with consecutive values of 47.67±1.15 g/day, 82.27±5.30 %, 16.47±1.22%, 4.07±0.15 %, 1.28±0.10 g, 2.43±0.09 %, 49.33±4.16%. Water quality during the study ranged still in optimal conditions for the growth of cobia fish, the temperature of 28.4-28.6 °C; pH 7.57; salinity 32-33 ppt; DO 5.12-5.33 mg/l.

Keywords

Enrichment; Sea worm; DHA selco; Nereis sp.

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Author Biographies

Erlin Hana Andung, Diponegoro University

Aquaculture Departement, Fac. Of Fisheries and Marine Science

Pinandoyo Pinandoyo, Diponegoro University

Aquaculture Departement, Fac. of Fisheries and Marine Science

Suryadi Saputra, Lampung

Balai Besar Perikanan Budidaya Laut (BBPBL)

Seto Windarto, Diponegoro University

Aquaculture Departement, Fac. of Fisheries and Marine Science

Vivi Endar Herawati, Diponegoro University

Aquaculture Departement, Fac. Of Fisheries and Marine Science

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