Feeding incidence and biological performance of Nilem carp, Osteochilus haseltii larvae to juvenile stages cultured under different aeration rate. Eri Setiadi and Yohanna R. Widyiastuti
Research Institute for Freshwater Aquaculture and Fisheries Extension (RIFAFE), Bogor, West Java, Indonesia
Abstract
Nilem carp, Osteochilus hasselti is one of the local species which has an economic value in Indonesia, especially, the fingerling size ^baby fish^. The purpose of this research is to determine the optimal of aeration rate for feeding incidence, feeding proportion, growth, and survival. The aeration rates of this research were adjusted to A) 0 ml/minute- B) 500 ml/minute- C) 1000 ml/minute- C) 1500 ml/minute- and D) 2000ml/minute. Each treatment consisted of three replicates. 600 of newly hatched larvae (1 day old) were stocked in the aquarium with size of 60 x 40 x 40 cm. Each aquarium was completed by water heater. Larvae were cultured for 45 days. Larvae were fed Artemia and artificial diet. The parameters were observed survival, growth, feeding incidence and feeding proportion. The result showed that the aeration rate has influenced the survival, absolute length, absolute weight, feeding incidence and feeding proportion (P<0.05). The water quality parameter such as dissolved oxygen was affected by aeration rate where the higher of aeration will be led to increase the value of dissolved oxygen concentration. The aeration rate of 1000 ml/minute is recommended to be suitable for larviculture of nilem carp in order to increase the seed production.
