Idul Male, La Ode Muh. Aslan, and Irwan Junaidi Effendy
Faculty of Fisheries and Marine science, Haluoleo University, Southeast Sulawesi
Abstract
A 45-day feeding trial was conducted to assess the effect of mix macroalgae on growth and survival rate of juvenile abalone rearing on floating cage. The research was carried out at the Abalone Hatchery Soropia Village Sub District Konawe, Southeast Sulawesi. A randomized complete design was selected in the experiment consisting 3 treatments and triplicates, they are A (G. verrucosa), B (G. verrucosa and U. lactuca), and C (G. arcuata and U. lactuca). The highest growth rate (1.170 ± 0.068 mm in shell length: 0.879 ± 0.118 g in body weigth), highest specific growth rate (3.695 % in shell length: 8.499% in body weight) and best food consumption rate were obtained from treatment A (G. verrucosa). Analyze of variance showed that treatment A is significantly different (P>0.05) on absolute growth rate of shell length and is not significantly different on body weight. However, on specific growth rate, all treatments are not significantly different for both shell length and body weight. Based on food consumption rate, juvenile abalone rearing on floating cage showed different level of food preference. The juvenile abalone preferred first to graze on Gracillaria rather than Ulva. During the rearing period, survival rate was achieved 100% for all treatments. Water quality measured during the research (temperature: 26-280C, pH: 8-8.5 and salinity: 28-32 ppt) and were being in the normal line to support growth and survival rate of juvenile abalone.
Key words: Haliotis asinina, macroalgae diets, growth, survival rate, and food consumption rate
Abalone Community 
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