Comparative Effect of Ratio of Fermented Azolla pinnata on Growth and Survival of Carp (Cyprinus carpio) Seeds

Abstract

The production in Indonesia of cultured fish in 2019 has increased from the previous year, the high demand for freshwater fish, especially carp will affect the feed needed in the cultivation process, while for now the price of commercial fish feed with good protein content the price of commercial feed are too expensive to come by and not readily available. The research evaluated the effect of different levels of formulated feed with fermented Azolla pinnata on the growth and survival of carp juveniles. The different levels of feeding fermented A. pinnata on the growth and survival of carp juvenile. The research was conducted from March 3, 2021 to November 2021 at the Fisheries Laboratory, Faculty of Fisheries and Marine Sciences, Padjadjaran University. This study used methods and Completely Randomized Design (CRD), which consisted of five treatments with triplicate of each , namely commercial feed control and feed containing 25%, 50%, 75%, and 100% of fermented A. pinnata . The test 300 carp juveniles were used for this study and they were divided into five group containing 20 carp juveniles with triplicate of each group of 5-7 cm are kept in aquariums filled with water as much as 10 liter with the density of carp juvenile during the study was 20 fish per aquarium with a maintenance period of 40 days. The feed given was 5% of the body weight of the test fish. Parameters observed were growth rate, feed conversion ratio, absolute growth, survival rate, and water quality which were observed weekly. Data obtained from this study were analyzed using ANOVA by Duncan's multiple post hoc analysis with a 95% confidence level. Based on research that fermented A. pinnata can be used as an additional feed for carp, feeding with a mixture of 25% pellets combined with A. pinnata 75% for the best treatment with a growth rate of 2.35%, absolute growth of 3,2 grams, feed conversion ratio of 2. 81 and a survival rate of 68%. Compare with control treatment, the results obtained were a growth rate of 2.60%, absolute growth of 4.1 grams, a feed conversion ratio of 1.62 and a survival rate of 68%, but the control treatment cost more due to using commercial feed without using feed addition.