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  • Journal Articles, Conference Papers and Book Chapters by SEAFDEC Staff
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Community-based technology transfer in rural aquaculture: The case of mudcrab Scylla serrata nursery in ponds in northern Samar, central Philippines

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Date
2014
Author
Baticados, Didi B.
Agbayani, Renato F.
Quinitio, Emilia T. ORCID
Page views
2,704
ASFA keyword
rural areas ASFA
aquaculture ASFA
technology transfer ASFA
crustaceans ASFA
animal population ASFA
socioeconomic aspects ASFA
small-scale aquaculture ASFA
socioeconomic impact ASFA
geography ASFA
pond culture ASFA
AGROVOC keyword
Mudcrab nursery
Scylla serrata AGROVOC
Philippines AGROVOC
Taxonomic term
Scylla serrata GBIF
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Abstract
Finding aquaculture development approaches to open up livelihood opportunities for the rural poor and in mainstreaming smallholder fish farmers to reduce poverty remain a challenge. This paper examines the community-based technology transfer mechanism of mudcrab nursery in ponds and its socioeconomic impacts on smallholder mudcrab growers in Northern Samar, Philippines. Results indicated that the technology is a viable enterprise done by a straight culture system method, which is the rearing of crablets from <1.0 to 4.0 cm for 42 days, or by-phases. However, technology adoption hinges on many factors like area ownership, farm distance from household, and market including the type of strategy needed to enhance technology uptake. Collaboration among research and development institutions and local partners is critical in training and empowering rural communities to adopt aquaculture technologies.
URI
http://hdl.handle.net/10862/2240
Suggested Citation
Baticados, D. B., Agbayani, R. F., & Quinitio, E. T. (2014). Community-based technology transfer in rural aquaculture: The case of mudcrab Scylla serrata nursery in ponds in northern Samar, central Philippines. AMBIO: A Journal of the Human Environment, 43(8), 1047-1058. https://doi.org/10.1007/s13280-014-0528-5 
DOI
10.1007/s13280-014-0528-5
Type
Article
ISSN
0044-7447; 1654-7209
Collections
  • Journal Articles [1278]

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    Overview of the mud crab industry in the Philippines 

    Quinitio, Emilia T. ORCID (Aquaculture Department, Southeast Asian Fisheries Development Center, 2017)
    Mud crab farming has long been established in the Philippines and the country is the second top producer in the world. Except for Scylla paramamosain, the three other species, S. serrata, S. tranquebarica and S. olivacea are commonly found in the country, but S. serrata is the preferred species for farming. Crab seeds for farming are mainly from the wild and in recent years, a small percentage from the hatchery. Due to the apparent decline of the wild crab stocks, provincial and municipal ordinances have been issued by a number of Local Government Units (LGUs) along with the Bureau of Fisheries and Aquatic Resources (BFAR) to conserve and manage the remaining resources. From the hatchery, megalopa or crab instars are grown in net cages installed in the nursery pond. Mud crab farming engages mostly in long-term grow-out culture of juvenile crabs to market size for 3-5 months, short-term fattening of lean crabs for 15-45 days, and recently, soft-shell crab production. Polyculture of juvenile crabs to market size with one to three other commodities in earthen brackishwater ponds is usually practiced. Mud crabs for soft-shell crab production are mainly from the wild, while SEAFDEC/AQD demonstrates the use of hatchery-produced juvenile mud crabs as seedstock. Refinement is continuously being done to improve the economic viability of producing crabs, although basic technologies have been developed for all phases of culture (hatchery, nursery, grow-out, fattening and soft shell crab production). The major issues facing the industry are the lack of seedstock, difficulty of zoea 5 to molt to megalopa stage, cannibalism particularly at the nursery phase, species identification at the juvenile stage, use of fish as aquafeed, diseases, effects of climate change and quality of crabs at postharvest. In 2012, the Philippine Council for Agriculture, Aquatic and Natural Resources Research and Development (PCAARRD) of the Department of Science and Technology (DOST) started funding projects under the National Mud Crab Science and Technology Program (NMCSTP) to address these issues. The major aim of the Program was to improve the production, profitability and sustainability of crab farming. SEAFDEC/AQD leads in capacity building with focus on the sustainability of the mud crab industry. Various collaborations and research studies on mud crab culture enabled SEAFDEC/AQD to package mud crab technologies, conduct local and international training courses and on-site technology demonstrations, and publish extension manuals and scientific publications since the mid1990s. Research and Development activities have been translated into improved production. With the recent developments and refinements of technologies, it is expected that the Philippines will increase its production by 25-50% in the next 5 years.
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    Larval rearing of mud crab (Scylla): What lies ahead 

    Waiho, Khor; Fazhan, Hanafiah; Quinitio, Emilia T. ORCID; Baylon, Juliana C.; Fujaya, Yushinta; Azmie, Ghazali; Wu, Qingyang; Shi, Xi; Ikhwanuddin, Mhd; Ma, Hongyu (Elsevier, 2018)
    The increasing global demand for mud crabs (genus Scylla) and threats to the wild populations highlight the urgency of fully rearing them in captivity. Despite considerable progress in mud crab production, most crab farms still rely heavily on wild-caught crablets and juveniles while the low and inconsistent success rates of larviculture remain as the main bottleneck impeding the development of mud crab aquaculture. Over the years, numerous studies have been conducted to determine the optimum larval rearing parameters, the ontogenic changes in digestive function and feeding behaviour, and the diets for different larval stages. These data, however, are dispersed and not summarised to inform culture practices. This review provides an update on the current progresses and to pinpoint the gaps in knowledge regarding mud crab larval rearing. We include all four mud crab species under the genus Scylla, i.e. Scylla serrata, Scylla olivacea, Scylla tranquebarica and Scylla paramamosain. Knowledge compiled in this review serves as an important guideline for prospective mud crab larviculture. Future research should gear towards filling in the gaps in our knowledge to advance mud crab larval rearing, thus fully incorporating mud crab into the aquaculture sector.
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    [The Philippines recommends for mangrove crab:] Commodity profile 

    The Mangrove Crab Technical Committee 2018 (DOST-PCAARRD, 2021)

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