Nursery culture of mangrove crab megalopae (Scylla serrata) in pond-based net cages

Abstract

This manual, titled “Nursery Culture of Mangrove Crab Megalopae (<i>Scylla serrata</i>) in Pond-Based Net Cages,” is part of SEAFDEC/AQD’s effort to assess the potential of using megalopae as the starting stock in pond-based net cage nurseries. The method is intended to enhance survival rates during the grow-out stage. Given the increasing availability of hatchery-reared megalopae and the high cost of crab instars, the manual also evaluates the cost-effectiveness and practical advantages of using megalopae in nursery operations. Hatchery-sourced megalopae offer key benefits over wild-caught ones, including consistent supply, environmental sustainability, disease-free status, species certainty, and stable pricing. This approach could help increase hatchery production cycles and lower overall production expenses in the crab farming industry.

The manual covers various aspects, including mangrove crab biology, site selection, pond preparation, nursery management, packing and transport procedures, and economic analysis.

The authors hope this resource will serve as a practical guide for crab farmers, farm managers, aquaculture professionals, technicians, and students by providing essential knowledge on science-based aquaculture practices.