Abstract
Sea cucumber Holothuria scabra has high market value and demand, consequently its stock has sharply declined due to overexploitation. Aquaculture of sea cucumbers is a key to conserve and to restore the decreasing population while producing them for commercial purpose. The obstacles in scale-up production are still need to be addressed in nursery stage, juvenile release techniques and grow out which can be implemented in pond culture. Growth performance of H. scabra juvenile cultured in floating hapas was investigated in pond in Sekotong, West Lombok. In 12 weeks of field trial, the effect of three different initial groups of juvenile: small (1.42 + 0.01 g ind-1), medium (3.42 + 0.02 g ind-1) and big (7.77 + 0.02 g ind-1) were tested on their growth and survival by Completely Randomized Design. The result showed both Specific Growth Rate and Weight Gain were higher in small group (2.57 + 0.11 ‰d-1 and 2.57 + 0.11 %, respectively). The highest survival rate was in the biggest initial size group. Pond in Sekotong, West Lombok is potential for nursery and grow out of H. scabra juvenile.
Highlights
Indonesia ranks on the top of FAO’s list for its captured sea cucumber with an average annual catch of 5.003 ton in 2009-2014 [1]
Introduction of new commodity is needed to revitalizing idle ponds, [6] reported that besides pen culture and sea ranches, grow out of H. scabra juvenile can be implemented in pond culture
The issues in scaling up the production in ponds lie in the nursery phase, juvenile release and grow-out techniques implemented in grow out system, both monoculture and IMTA [7, 9, 10]
Summary
Indonesia ranks on the top of FAO’s list for its captured sea cucumber with an average annual catch of 5.003 ton in 2009-2014 [1]. According to [8] several steps to produce H. scabra were broodstock collection and maintenance, spawning and larvae rearing, settlement phase and early juvenile rearing nursery and grow out of juvenile. After produced larvae successfully, the issues concerning nursery, release and aspects of juvenile growth in the wild are need to be addressed to increase production significantly. Introduction of new commodity is needed to revitalizing idle ponds, [6] reported that besides pen culture and sea ranches, grow out of H. scabra juvenile can be implemented in pond culture. The issues in scaling up the production in ponds lie in the nursery phase, juvenile release and grow-out techniques implemented in grow out system, both monoculture and IMTA [7, 9, 10]. This study was carried out to determine the effect of initial juvenile size on growth and survival of H. scabra juveniles in floating hapas in earth pond
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