Feeding habits of larval rabbitfish, Siganus guttatus in the laboratory
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Abstract
The feeding habits of Siganus guttatus larvae were determined in laboratory rearing studies at 23.8-30.3 degree C by examination of digestive tract contents of larvae given rotifers and/or brine shrimp. Larvae were initially fed on rotifers at a total length (TL) of 2.6 mm (day 2 from hatching), and on brine shrimp at 4.4 mm TL (day 12). A change in feeding habits, seen as the flexion point in the relationship between larval TL and maximum amount of prey, occurred at about 7.0-9.5 mm TL with rotifers as prey, and at 7.2 mm TL with brine shrimp. Higher preference for brine shrimp over rotifers was seen in larvae 8-9 mm TL and larger. These changes in habit coincided with the full osteological development of the feeding apparatus in larvae at 7-8 mm TL. S. guttatus larvae exhibited a diurnal feeding pattern at day 9 (mean 3.7 mm TL), day 15 (5.8 mm TL) and day 21 (7.9 mm TL).
Paglalarawan
ALSO IN: Compilation of JICA Expert Activities at SEAFDEC, Aquaculture Department (1986-1990) and additional (since 1974) by S. Fukumoto, vol.2, Japan International Cooperation Agency (JICA) 1990, pp143-148.
Suggested Citation
Hara, S., Kohno, H., Duray, M., Bagarinao, T., Gallego, A., & Taki, Y. (1986). Feeding habits of larval rabbitfish, Siganus guttatus in the laboratory. In J. L. Maclean, L. B. Dizon, & L. V. Hosillos (Eds.), The First Asian Fisheries Forum. Proceedings of the First Asian Fisheries Forum, 26-31 May 1986, Manila, Philippines (pp. 573-576). Manila, Philippines: Asian Fisheries Society.
