Effects of Different Light Intensities on Fry Growth, Survival and Cannibalism Control of Asian Seabass (Lates calcarifer)

摘要

Successful fish culture depends on an understanding of the optimum environment of particular species to maximize survival and development. A 4-week experiment was carried out to investigate the effects of light intensity on survival, growthand cannibalism of Asian seabass, Lates calcarifer. Four light intensities, 0, 500, 1,000 and 2,000 lx were tested in triplicates. Asian seabass with an initial total length (TL) of 9.88 - 1.23 mm were fed to satiation four times a day. Other morphological changes such as body length (BL), head length (HL), body height (BH), pectoral height (PH) and eye diameter (ED) were recorded once a week. In addition, survival and cannibalism rates were calculated at the end of the experiment. The results showedthat light intensity significantly affected (P0.05) the survival, growth, and cannibalism of Asian seabass. Optimum survival and growth were observed in 500-1,000 lx. This information can be used to establish stable mass-scale and sustainable rearing technology for Asian seabass.