Retaining our mangrove greenbelt: Integrating mangroves and aquaculture
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Although multilateral agencies in Southeast Asia have long been promoting that mangroves, and other wetlands, are wastelands to be put into better use, such as conversion to ponds. However, there is a need for Mangrove Friendly Aquaculture (MFA) technology in the intertidal forest, or swamp, which does not require the clearing of trees. MFA may be defined on 2 levels: 1) silvofisheries or aquasilviculture, where the low density culture of crabs, shrimps and fish is integrated with mangroves; and, 2) mangrove filters where mangrove forests are used to absorb the excess nutrients in the effluents from high-density culture ponds. A review is made of MFA practices belonging to the first category. Discussion is on a country basis, moving from traditional systems in Indonesia, to the introduced technologies in Indonesia, Vietnam, the Philippines and Malaysia. It is hoped that this review will be of use to scientists, aquaculturists, policy makers and governmental/NGOs interested in making aquaculture more ecologically sound and socially responsible.
CitationPrimavera, J. (2004). Retaining our mangrove greenbelt: Integrating mangroves and aquaculture.
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Fish habitats in a small, human-impacted Sibunag mangrove creek (Guimaras, Philippines): a basis for mangrove resource enhancement The fish assemblage of a small, open access mangrove creek highly influenced by aquaculture farms, was studied for the first time in the Philippines as a baseline of such system as well as examining the degree of ecological disturbance among fish habitats, as basis for the necessity to rehabilitate mangrove resources aiming to balance human activities and mangrove functioning. In total, 475 fishes (total weight = 3875 g) were captured and 50 species representing 32 families were identified. Thirty two species were represented by small numbers (< 5 individuals). Commercial species was considerably high (~23 species) but majority were low grade commercial species. Total species, species diversity and fish abundance consistently showed a decreasing pattern from outside creek to inner creek. Fish habitats exhibited substantial differences following a distinct spatial segregation of fish communities, a dominance of non-shared species and a minimal species overlapping inside the creek, which is attributable to the existing mangrove fragmentation associated with aquaculture ponds in the area. Increasing levels of disturbances were observed within the creek indicating ‘stress’ as a result of overutilization of mangroves by aquaculture farms. Our results confirmed the need to rehabilitate mangrove resources in this area. The development of mangrove resources through reforestation, coupled by strict regulation of fishing activities and aquaculture ponds will reduce ecological stress in the area and regain gradually a robust mangrove functioning that will improve fish diversity, fisheries and productivity of adjacent coastal systems by creating a suitable fish nursery, feeding ground and refuge habitat.
Book | Conference publication
Mangrove-Friendly Aquaculture : Proceedings of the Workshop on Mangrove-Friendly Aquaculture organized by the SEAFDEC Aquaculture Department, January 11-15, 1999, Iloilo City, Philippines JH Primavera, LMB Garcia, MT Castaños & MB Surtida (Eds.) - 2000 - Southeast Asian Fisheries Development Center, Aquaculture DepartmentThe proceedings have three review papers on the mangroves of Southeast Asia, silvofisheries, and Indonesia's integrated mangrove forest and aquaculture systems. The rest of the papers, all on mangrove-friendly aquaculture efforts are from the Philippines, Japan, Thailand, Vietnam, Malaysia, Brunei Darussalam, Indonesia, and Cambodia. All the countries represented had varied methodologies, with Cambodia in its initial stages while some countries like Indonesia and Thailand have tested methodologies. The proceedings include a tabulation of the reported mangrove-friendly technology by country -- e.g. silvofisheries in ponds (mangrove and fish/shrimp/mudcrab) and pens (mangrove and mudcrab). The workshop recommendations are classified into three major topics: problems associated with mangroves, problems associated with aquaculture practices, and socioeconomic and cultural issues.
Property rights and collective action in the management of mangrove ecosystems: implications of the adoption of mangrove friendly-aquaculture RF Agbayani - In JH Primavera, LMB Garcia, MT Castaños & MB Surtida (Eds.), Mangrove-Friendly Aquaculture : Proceedings of the Workshop on Mangrove-Friendly Aquaculture organized by the SEAFDEC Aquaculture Department, January 11-15, 1999, Iloilo City, Philippines, 2000 - Southeast Asian Fisheries Development Center, Aquaculture DepartmentThe SEAFDEC/AQD experience in Malalison Island on the Community Fishery Resources Management Project is well used in the Aklan project on community-based mangrove-friendly aquaculture. The territorial use rights in fisheries that was implemented in Malalison has become a model in investigating property rights regime in state-owned mangrove areas in Ibajay, Aklan. The concept of property rights as a management strategy in arresting the further destruction of mangroves and rehabilitating destroyed mangrove forest requires the collective effort of different users and stakeholders. There is a need to balance environmental conservation and food security in the management of mangrove resources.