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Sea bass, groupers and snappers

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adsea91p003-012.pdf (91.46Kb) Open Access
Downloads: 5,631
Date
1994
Author
Duray, Marietta N.
Page views
7,584
Subject
sex reversal ASFA
pond culture ASFA
induced ovulation ASFA
sperm ASFA
seed production ASFA
spawning ASFA
fish larvae ASFA
light effects ASFA
sex hormones ASFA
transportation ASFA
fecundity ASFA
nutritional requirements ASFA
sexual maturity ASFA
cage culture ASFA
breeding stock ASFA
steroids ASFA
Epinephelus AGROVOC
Lates calcarifer AGROVOC
Lutjanus AGROVOC
Philippines AGROVOC
Taxonomic term
Lates calcarifer GBIF
Metadata
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Abstract
Studies on sea bass (Lates calcarifer) broodstock were directed at techniques to maximize egg production. Now known are the: optimum luteinizing hormone releasing hormone analogue (LHRHa) dose range to induce spawning, optimum egg size responsive to LHRHa induction, appropriate time for induction, proper storage conditions for LHRHa, and induction of spermiation in males. Gonadal maturation and spawning are successfully induced by LHRHa and/or 17 alphamethyltestosterone. An experiment on photoperiodic induction of sexual maturation is being conducted to produce seed year round. Increased information on larval morphology and physiology of sea bass led to improvements in feeding strategies and transport techniques. Studies on nutrient requirements and practical diets are currently being undertaken for different stages/sizes of sea bass. An economic assessment found an integrated sea bass production system viable.

Studies on groupers (Epinephelus spp.) have been geared towards broodstock development including induction of sex inversion by hormonal control, intraspecific interaction, and sex control using synthetic anabolic steroids. Spontaneous maturation and successive spawnings of captive Epinephelus suillus were achieved in 1990. Larval rearing techniques used for other marine fish species were tried but with limited success. Culture techniques in ponds and floating cages using SEAFDEC-formulated diets or commercial pellets are being developed.

Studies on snappers (Lutjanus spp.) have been started with the identification of species common in Panay Island.
URI
http://hdl.handle.net/10862/36
Suggested Citation
Duray, M. N. (1994). Sea bass, groupers and snappers. In F. Lacanilao, R. M. Coloso, & G. F. Quinitio (Eds.), Proceedings of the Seminar-Workshop on Aquaculture Development in Southeast Asia and Prospects for Seafarming and Searanching; 19-23 August 1991; Iloilo City, Philippines. (pp. 3-12). Tigbauan, Iloilo, Philippines: Aquaculture Department, Southeast Asian Fisheries Development Center.
Type
Conference paper
ISBN
971851127X
Collections
  • ADSEA '91 [21]


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