The potential of Brachionus sp. for Koi fish (Cyprinus carpio) cultivation infected by Myxobolus sp.

Abstract

The first step to success in Koi fish cultivation is hatchery activity. However, in the process of cultivation often suffer difficulty due to the parasitic outbreak. The type of parasites that often attacks Koi fish is Myxobolus sp. Therefore, the natural feed is needed such as Brachionus sp. as a protein resource for the survival of Koi fish that infected by Myxobolus sp. Purpose of this research was to find out the potential of Brachionus sp. as a natural feed for Koi fish cultivation that infected by Myxobolus sp. The research method used the descriptive method. The sample was taken at two pond sites that infected by Myxobolus sp. and clean pond by filtering pond water using a plankton net and preserved in a bottle then conducted the identification and calculation of the abundance of Brachionus sp. under the microscope. The results show that observation on each pond found Zooplankton with species of Brachionus sp. and obtained a number of Brachionus sp. abundance on site 1 (infected by Myxobolus sp.) got 57ind/ml. while site 2 (clean pond) got 22 ind/l. The hemagglutinin test results showed fish infected with Myxobolus sp. react positively.