Philip Teguh Imanto
Research Institute for Mariculture, Gondol, Bali

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EFFECT OF MICROALGAE ON GROWTH AND FATTY ACID PROFILES OF HARPACTICOID COPEPOD, Tisbe holothuriae Gede Suwarthama Sumiarsa; Philip Teguh Imanto
Indonesian Aquaculture Journal Vol 4, No 2 (2009): (December 2009)
Publisher : Center for Fisheries Research, Agency for Marine and Fisheries Research and Human Resource

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (116.243 KB) | DOI: 10.15578/iaj.4.2.2009.139-146

Abstract

Growth of marine copepods is influenced by feed. The purposes of this trial were to observe both growth and fatty acid compositions of harpacticoid copepod nauplii, Tisbe holothuriae by feeding with several microalgal species in laboratory: (A) Isochrysis tahiti; (B) Nannochloropsis oculata; (C) Rhodomonas sp., and (D) Tetraselmis chuii. The trial was carried out for 35 days with randomized complete design and triplicates in each treatment. The results showed that final copepod nauplii densities were not significantly different (P>0.05) in all treatments. However, lipid content of copepod nauplii fed with T. chuii was significantly higher (P<0.05) compared to that of other treatments while fatty acid profiles of EPA, DHA and DHA/EPA ratios showed both insignificant and significant differences among treatments.
SATIATION AND DIGESTION RATE OF MANGROVE SNAPPER FINGERLING (Lutjanus argentimaculatus) Made Suastika; Philip Teguh Imanto
Indonesian Aquaculture Journal Vol 2, No 1 (2007): (June 2007)
Publisher : Center for Fisheries Research, Agency for Marine and Fisheries Research and Human Resource

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (41.858 KB) | DOI: 10.15578/iaj.2.1.2007.47-50

Abstract

Mangrove snapper is an economically value in domestic as well overseas market, but supplies are mostly sourced from the wild. Observations on satiation and digestion rate of fingerlings was undertaken to provide basic information for culturing mangrove snapper. Ten fingerling mangrove snapper (body weight 3.8—19.5 g) were stocked into each of nine plastic 200 L tanks. After starvation for 24 hours, fish were fed with chopped ‘trash’ fish and the amount of eaten feed was record as satiation data. Feeding data was recorded after 4 hours feeding. The satiation rate for juvenile mangrove snapper followed the power regression line Y=0.4503x-0.6472. Thus, in larger juveniles the satiation rate was lower. Digestion rate followed a polynomial regression line, indicating that digestive activity was not the same during observation time, and analysis of two linear regressions shown that the flection point for digestion rate occurring after 10 hours when digestion rate reached 72%. These results indicate that the optimum feeding rate for mangrove snapper fingerling was 72% of satiation, and optimum feeding frequency two times per day.