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Approaches to stock enhancement in mangrove-associated crab fisheries
Le Vay, L.; Lebata, M.J.H.; Walton, M.; Primavera, J.H.; Quinitio, E.; Lavilla-Pitogo, C.; Parado-Estepa, F.; Rodriguez, E.; Ngoc Ut, V.; Trong Nghia, T.; Sorgeloos, P.; Wille, M. (2008). Approaches to stock enhancement in mangrove-associated crab fisheries. Rev. Fish. Sci. 16(1-3): 72-80.
In: Reviews in Fisheries Science. Taylor & Francis: Boca Raton. ISSN 1064-1262, more
Peer reviewed article  

Available in  Authors 

    Crab fisheries; Hatcheries; Mangroves; Stocking (organisms); Scylla De Haan, 1833 [WoRMS]; Scylla paramamosain Estampador, 1950 [WoRMS]; Scylla serrata (Forskål, 1775) [WoRMS]; Scylla tranquebarica (Fabricius, 1798) [WoRMS]; ISEW, Philippines [Marine Regions]; Marine; Brackish water
Author keywords
    mangrove; mud crabs; Scylla; enhancement; hatchery; replanting

Authors  Top 
  • Le Vay, L.
  • Lebata, M.J.H.
  • Walton, M.
  • Primavera, J.H.
  • Quinitio, E.
  • Lavilla-Pitogo, C.
  • Parado-Estepa, F.
  • Rodriguez, E.
  • Ngoc Ut, V.
  • Trong Nghia, T.
  • Sorgeloos, P., more
  • Wille, M., more

    Over the last decade, hatchery production of mud crabs has become technically and economically more feasible, enabling evaluation of the potential effectiveness of hatchery release in fisheries enhancement. The high growth rates and limited movement of released crabs mean that fisheries' yields in isolated mangrove systems with restricted recruitment can be enhanced within a few months. Thus, a release program may be an effective strategy for short-term enhancement in carefully selected specific areas. To date, results are very promising, with recovery rates up to 50% and increases in fisheries' yield up to 46% over baseline catches. In contrast, mark-recapture studies in more open mangrove system populations show that recruitment success and subsequent stock abundance may be largely determined by habitat availability. For these populations, restoration of lost or degraded mangrove areas has been shown to be effective in promoting stock recovery through natural recruitment, with replanted mangroves supporting fisheries of equivalent economic value to that of natural mangroves, though it may take some years to reach these levels. Thus, a balanced approach to stock management could integrate both hatchery-release and habitat restoration programs, depending on local conditions and over different time scales, with parallel co-management to support effectiveness.

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