The early life strategy in the abundance of black sea bream, Acanthopagrus schlegelii in Hiroshima Bay

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Up to now, black sea bream, Acanthopagrus schlegelii in Hiroshima Bay is an important commercial and sport fishing species. Thus stock biomass of this species has been restored by stock enhancement program. Abundance of adult stock may be sustained by survivorship at the different life stages, principally reproduction, pre-recruitment and benthic recruitment events. The objective of this program is to detect in the early life cycle that are most vulnerable to environmental perturbations, black sea bream in Hiroshima Bay. Although black sea bream habits at the Ota River estuary within the site of the present study in Hiroshima Bay, micro-graphical eggs distributions reveal main spawning grounds form outer the bay as being marine-spawned species. The peak blooming of eggs by nocturnal breeders was commenced form the end of May to mid-Jun. The first settlers arrived at the beginning of July. Feeding items of post-recruitment exhibited high flexibility against their settlements environments.