Abstract
Larval settlement stage of abalone (Haliotis asinine) depends on availability of feed and substrate compatibility. Existing feed size and feed type diversity in substrate will affect larval settlement stage, feeding habit and survival rate of abalone larvae. This study aims to find out the most suitable substrate for larval settlement of the tropical abalone. It is conducted in February-April, 2013 at Brackish Water Aquaculture Center, Takalar Regency, South Sulawesi. Applied experimental design is Completely Randomized Design. There are 3 types of test substrate: coral, cement and plastic with 3 replications for each substrate. This study shows that statistically, substrate differences do not affect to larval settlement stage. The highest stage of larval settlement is to coral substrate by 3.3%, followed by cement and plastic by 2.2% and 0.2% respectively. The highest average stage of living larva on coral and cement substrate are 15.3%, while on plastic substrate is 8.7%.
Highlights
Tropical abalone (Haliotis 184sinine) is one of aquatic biological resources from coral reef with high economic value
Result of variant analysis shows that there is no effect of larval settlement to the substrates (P>0.05)
Based on research finding on tropical abalone larva (H. asinina), it can be concluded that: 1. Success rate of abalone seeding effort, especially the settlement is determined by seed parents quality, feeding management, water quality management and pest and disease control
Summary
Tropical abalone (Haliotis 184sinine) is one of aquatic biological resources from coral reef with high economic value. Abalone belongs to export commodity with high price either for its meat or eggshell. This shell is very popular in other countries such as Japan, US, European countries, Columbia and Canada because of its delicious meat and low cholesterol level. Abalone seeding effort has been developed, but its survival rate is still low of about 10-15% (William et al, 2008). Environmental factor (Baldwin et al, 2007 and Hadijah et al, 2013), feed type and size diversity (Chen and Chen, 2000) belong to determinant factors of abalone survival rate. Williams et al, (2008) states that the success rate of larvae in the process of settlement is determined by the substrate in the growth medium (Williams., et al, 2008)
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