Maturation and induced spawning of the mangrove red snapper (Lutjanus argentimaculatus) reared in a floating net cage in the Philippines
Abstract
Wild-caught mangrove red snapper (Lutjanus argentimaculatus) were reared in a floating net cage at SEAFDEC/AQD's Igang Marine Substation at Guimaras Island, Central Philippines. In 1993, monthly samplings and induced spawning trials were conducted as part of a project on seed production. Gonadal development began in February for males and April for females, reached a peak in September and declined in December. Males and females had ripe gonads for up to 5-6 consecutive months. Spawning occurred in the evening (2000 to 2300 hours), 32-36 hours after a single intramuscular injection of 1,500 IU human chorionic gonadotropin kg-1 body weight (BW). About 0.53-2.14 million eggs were collected per female (2.5-4.4 kg BW) with fertilization rates of 21-97% and hatching rates of 42-80% resulting in 30-85% normal larvae (straight and without deformities). The results strongly suggest the feasibility of breeding mangrove red snapper in floating net cages.
Citation
Emata, A. C. (1996). Maturation and induced spawning of the mangrove red snapper (Lutjanus argentimaculatus) reared in a floating net cage in the Philippines. In F. Arrenguin-Sanchez, J. L. Munro, M. C. Balgos, & D. Pauly (Eds.), Biology, Fisheries and Culture of Tropical Groupers and Snappers (pp. 378–384). Makati City, Philippines: International Center for Living Aquatic Resources Management.
Publisher
International Center for Living Aquatic Resources Management (ICLARM)Subject
Type
Conference paperISSN
0115-4435ISBN
9718709622Collections
- Conference Proceedings [283]
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