Abstract:
Koi fish is one of the most sought-after and cultivated ornamental fish because it is an
expensive group of ornamental fish that is excellent in the international market. The larval
period is the most critical phase in fish farming because in this phase the body's resistance is still not good and it is still vulnerable to changes in environmental conditions. The purpose of this study was to determine the effect of the response of different types of feed on the survival rate and growth of koi fish larvae. This research was conducted using the experimental method and completely randomized design (CRD) with 3 treatments and 3 replications. The feed used is Daphnia sp., Tubifex sp. and commercial feed. The research parameters included survival rate, relative weight growth, relative length growth, mouth opening size and water quality. The results showed that the response of different types of feed had a significant effect on survival, relative weight growth and relative length growth. The best results were obtained for treatment A (feed daphnia sp., tubifex sp. and commercial feed) with a survival rate of 79.333%, relative weight growth with a value of 1.413.725% and relative length growth with a value of 412.282%. The water quality parameters during the study were optimal and still within reasonable limits for the maintenance of koi fish larvae.
