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Report on a training on seafarming of grouper and seaweed held at Mentok, Bangka 21-26 September 1987







Pontjoprawiro, S. May 1988. Report on a training on seafarming of grouper and seaweed held at Mentok, Bangka 21-26 September 1987. (np). 13 p.


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    Report on the Training Workshop on Seafarming1 –6 March 1981Denpasar, Bali, Indonesia project 1981
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    The Senior Seafarming Adviser (Team Leader) for the Preparatory Assistance in Seafarming Project (INS/80/005), upon his departure for FAO Rome assigned the Fishcage/Pen Culture Specialist to complete the relevant technical reports and working papers for the project. The following is a report on the 6-day Training Workshop sponsored by the Project, held in Denpasar, Bali province, 1–6 March 1981.
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    The food and feeding of seabass Lates calcarifer, grouper Epinephelus tauvina and rabbitfish Siganus canaliculatus in floating net cages at the National Seafarming Development Centre, Lampung, Indonesia 1989
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    Four cage feeding trials involving a total of fifteen different dietary feeding regimes were conducted with seabass (Lates calcarifer), grouper (Epinephelus tauvina) and rabbitfish (Siganus canaliculatus) from fingerling to market size over a 100 to 156-day rearing period. Seabass fed frozen fish or a moist pellet displayed the best growth response, with fish (30/m3) growing from an initial weight of 8.9g and 8.5g to a final weight of 285.5g and 257.5g in 156 days, with a food conversion ratio o f 3.77 – 5.10 (dry matter basis 0.96 – 1.30) and 1.89 – 3.20 (dry matter basis 1.15 – 1.95), and with a survival of 93.3% and 93.3%, respectively. During the seabass trial the estimated feeding cost/kg fish produced was Rp 1458 – 1964 and Rp 1537 – 2584 for fish fed frozen fish and moist pellet, respectively. Grouper fed frozen fish and moist pellet also displayed the best growth response, with fish (30/m3) growing from an initial weight of 23.8g and 25.8g to a final weight of 471.7g and 388.7g in 156 days, with a food conversion ratio of 3.53 – 4.16 (dry matter basis 0.89 – 1.06) and 1.73 – 2.96 (dry matter basis 1.06 – 1.80), and with a survival of 90% and 98.3%, respectively. During the grouper trial the estimated feeding cost/kg fish produced was Rp 1342 – 1603 and Rp 1382 – 2396 for fish fed frozen fish and moist pellet, respectively. In the case of rabbitfish, the best growth was observed for fish fed a dry in-house crumble containing 31% crude protein; fish (15/m3) growing from an initial weight of 51.7g to a final weight of only 110.3g in 100 days, with a food conversion ratio of 3.48 (dry matter basis 3.08) and estimated feeding cost/kg fish produced of Rp 2349. However, all rabbitfish fed formulated rations displayed marked sexual activity by the end of the feeding trial (62 – 93% of the fish yielding milt or eggs on hand stripping).
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    Seafarming resources map 1989
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    This manual was revised to up-date the data according to information recently obtained from the provincial fisheries officers, and field surveys carried out during 1986–1988. The authors are grateful for generously of their time and cooperation during field visit to the potential areas. The authors are greatly indebted to the National Institute of Aeronautics and Space (LAPAN), particularly Dr. Mahdi Kartasasmita, the Head of Earth Resources Satellitte Ground Station and Mrs. Sri Utaminingsih, P rocessing Data Analysis Officer who provided satellite imageries taken from MSS Landsat to confirm the suitability and the estimated area of the potential sites.

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