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Larval rearing techniques and stock enhancement of silver seabream (Rhabdosargus sarba) in MauritiusThe silver sea bream (Rhabdosargus sarba), has great commercial value in Mauritius. The species is a potential candidate for aquaculture. The sea bream, a winter spawner, was successfully induced to breed in captivity with HCG (Human Chorionic Gonadotropin) hormone injection (250 IU/kg body weight) in 1989 at the Albion Fisheries Research Centre. In 1997, the Coastal Fisheries Resources and Environment Conservation Project of Japanese International Cooperation Agency (JICA) was launched to enhance the stock of the silver sea bream in the lagoon. This species breeds under hatchery conditions during the spawning season. Annually, the hatchery-produced sea bream fingerlings, of 2.0 to 2.5 cm body length, were released in the coastal areas. The larval rearing method adopted at the Albion Fisheries Research Centre is described.
Some results of the study on rearing of mangrove crab Scylla serrata juveniles in the barachois of MauritiusThe mangrove crab, Scylla serrata (Forskal) is a potential candidate for aquaculture development in Mauritius and experimental trials on its culture were carried out from 1997 to 2002. It has a fast growth rate and tolerates a wide range of physico-chemical parameters. The survival rate of Scylla serrata, both under the controlled/hatchery conditions and in the natural eco-habitat is low. In 1997, the Japan International Cooperation Agency (JICA) launched the “Coastal Fisheries Resources & Environment Conservation Project” to enhance the stock of crab in the lagoon waters. The quantity of crab juveniles for culture in barachois is dependent on the availability of seed in the lagoon. Hatchery-produced crab juveniles were reared for experimentation/study in pen enclosures in two barachois prior to release in the coastal areas. The bio-indicators, stocking density and feeding regime differed in the two experimental studies. These experiments indicated varying survival and growth rates using different feeding regimes and stocking densities.