Larval intervals of the sea bass, Lates calcarifer, based on the development of swimming and feeding functions.
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Developmental sequences of characters concerned in swimming and feeding function were examined on laboratory-reared seabass larvae. Based on a scheme of development events constructed in this study, the early life hisory of the species can be divided into the following five phases. A (to about 2.5 mm TL): larvae have no noticeable skeletal structure concerned in swimming and feeding function. B (to about 4.5 mm TL): principal elements of swimming-related characters appear and start to develop; jaw and pharyngeal teeth strt to develop. C (to about 6.0 mm TL): position of the greatest body depth begins to shift bacward; dorsal and anal fin-rays attain to adult commplements; serration-like upper jaw teeth decrease in number and finally disappear. D (to 7.0 - 7.5 mm TL): notochord end flection is completed; conical spper jaw teeth start to develop, replacing the serration-like teeth. E (beyond 7.0 - 7.5 mmTL): larvae can be regarded as reaching juvenile stage in this phase from the view-point of functional morphology, although the first larvae with completely develop fin-ray counts was 10.25 mm TL in this study.
In: Chou, L.M., Munro, A.D., Lam, T.J., Chen, T.W., Cheong, L.K.K., Ding, J.K., Hooi, K.K., Khoo, H.W., Phang, V.P.E., Shim, K.F., Tan, C.H. (eds.). The Third Asian Fisheries Forum. Proceedings of the Third Asian Fisheries Forum, 26-30 October 1992, Singapore. Manila, Philippines: Asian Fisheries Society. pp. 98-101
PublisherAsian Fisheries Society
- Conference Proceedings 
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Conference paperJD Toledo - In Fishlink 2001, 29-31 May 2001, Sarabia Manor Hotel, Iloilo City, 2001 - University of the Philippines Aquaculture Society, Inc.Marine fish production has increased dramatically in the past ten years and majority of the cultured species were produced in Asia in 1992. Increase in production was accompanied with concerns on increasing outbreak of disease, degradation of environment as a consequence of culture practices, and the alleged shortage of seed supply and feeds. This paper reviews the state of the art of the culture of grouper, sea bass and red snapper.
Conference paperLMB Garcia - In LM Chou, AD Munro, TJ Lam, TW Chen, LKK Cheong, JK, Ding, KK Hooi, HW Khoo, VPE Phang, KF Shim, KF Shim & CH Tan (Eds.), The Third Asian Fisheries Forum. Proceedings of the Third Asian Fisheries Forum, 26-30 October 1992, Singapore, 1994 - Asian Fisheries SocietyRecent advaces in the spontaneous and hormoneinduced breeding of caged sea bass (Lates calcarifer bloch, Family Centropomidae) are reviewed. Spontaneous spawnings follow a semilunar rhythm, with most spawings accurring in the evening of quarter moon. Independent of the Lunar-associatd rhythm, mature sea bass which have attained the critical oocyte size of 0.40 mm spawns after an injecton or implantation of luteinizing hormone-releasing hormone analogue (LHRHa) Pelleted LHRHa along together with methyltestosterone can advance sexual maturation and spawning in April-May, ahead of peak breeding in July-August. Depending on the pelleted or injected LHRHa dose, mature female sea bass spawns singly or consecutively over 4 evenings. LLHRHa-induced egg release peaks during the first day of a multiple spawning bout. Daytime injection of LHRHa stimulates spawning in the evening until dawn, while fish injected LHRHa at night induces spawning at daytime and releases fewer eggs compared to nighttime spawning. these results optimize the use of LHRHa to stimulate gonad maturation and spawning so that sea bass seed are made available for hatchery rearing and grow-out.