Dosis Total CaO 100 mg/L Dengan Frekuensi Berbeda Terhadap Kinerja Pertumbuhan Lobster Air Tawar Cherax quadricarinatus

Abstract

The purpose of this research was to determine the correct frequency of lime addition at total dosage of 100 mg/ L to support rearing phase in order to maintain the continuity of calcium inside the culture media. The average length of crayfish used in this study was 3.48 ± 0.06 cm and the average weight was 1.14 ± 0.08 g. Containers used in this study was aquarium sized 50 cm x 30 cm x 30 cm. Lime addition treatments consisted of lime addition once at the initial stage of rearing at 100 mg/ L, once every 10 days at 33.34 mg/ L, once every 5 days at 16.67 mg/ L, and control treatment without lime addition. This research was performed for 30 days. Feed was given using at satiation, with feeding frequency of 2 times per day. The results showed that lime addition once every five days at 16.67 mg/L showed increasing specific growth rate at 1.64%. Based on the result of this study, it could be concluded that lime addition should be performed once