Open AccessNATURAL FEED (ROTIFER) MANAGEMENT ON ORANGE SPOTTED GROUPER Epinephelus coioides LARVAL REARING
Author(s) -
Titiek Aslianti,
Irwan Setyadi
Publication year - 2015
Publication title -
e-journal ilmu dan teknologi kelautan tropis
Language(s) - English
Resource type - Journals
ISSN - 2085-6695
DOI - 10.28930/jitkt.v6i2.9015
Subject(s) - biology , zoology , grouper , epinephelus , fish <actinopterygii> , fishery
A ccording to Indonesian Standard Quality , t he optimal seed production of orange spotted grouper ( Epinephelus coioides ) has been unsuccessful due to the problem s occurred during larval rearing period. Efforts on mass rearing of larvae has been carried out in this study to optimize the natural feeding (rotifer). The purpose of this research wa s to obtain the information about an appropriate duration time for natural feeding (rotifer) to produce higher survival rate. The treatment for providing rotifers on larvae (days after hatching/DAH) i.e., (A) 20 days, (B) 25 days, (C) 30 days, and (D) 35 days. Rotifers were enriched with DHA Selco. Experiment used fiber tanks with 1 m 3 capacity with a completely randomized design (CRD) and three replicates. The larvae was reared to achieve the juvenile phase (D-45). The best results from 1 m 3 tanks were then reared using concrete tanks of 6 m 3 and 10 m 3 capacities. The results showed that feeding of rotifers up to 25 DAH larvae on fiber tanks (1 m 3 ) produced the hughest survival rate (7.63 %). Meanwhile, the mass reared in 6 m 3 and 10 m 3 concrete tanks produced survival rate of 4.9 ± 3,54 % and 8.8 ± 2.26%, respectively. Thehomogenous size was relatively high (80%) and the seed abnormality was relatively low (0.4%). Keywords: rotifers , feeding time, Orange Spotted grouper larvae, Epinephelus coioides