Abstract
This research aimed to determine the level of sea rabbit (Dolabella auricularia) extract microcapsule-mixed feed on consumption in goldfish (Carassius auratus). The extraction process was done by maceration method using a single solvent, namely ethyl acetate, while in making microcapsules, 1% of sodium alginate was used as a coating. The animals tested which used were goldfish with their size 7.56 ± 0.3 g and they were kept for 30 days. These animals tested were divided into two groups; the fish group that was fed with 7.7% sea rabbit extract and the control fish group or without sea rabbit extract microcapsules. The foods given was as much as 3% of fish body biomass in the morning and evening with protein ranging from 42-44%. The results showed that the highest absolute growth rate in feeding which had been mixed with sea rabbit extract microcapsules had a value of 3.16 g, food consumption rate was 62.84 g, the efficiency of feeding was as much as 29.49% while the value of conversion ratio of feeding was 3.39. From those results of this research, it can be concluded that the use of feed which had been mixed with sea rabbit extract microcapsules could increase the absolute growth, feed consumption level, the efficiency of feeding so that it was potential to be developed as a supplement in fish feed.
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