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Promotion of initiatives to ensure the sustainability of the mangrove crab fishery and its value chains in Madagascar









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    Enhancing value-chain performance for mud crab in Madagascar 2014
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    The mud crab fishery in Madagascar is an exclusively traditional fishery, composed of on-foot or pirogue fishers using very simple fishing techniques and gears, such as handlines or hooks mounted on sticks. This is mainly due to the fact that mangrove forests, the natural habitat of the Scylla serrata crab, are often in remote and difficult to access areas.
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    Report of the Seminar on the Mud Crab Culture and Trade - BOBP/REP/51
    Swat Thani, Thailand; November 5-8,1991
    1992
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    The mud crab, Scylla sp.. found throughout the Indo-Pacific region. has become increasingly popular by virtue of its meat quality and large size. While regional trade in the species has been growing. very little attention has been given to the fishery and culture in the Bay of Bengal region. The fishery, culture and trade in Scylla sp. i s small-scale and involves artisanal fisherfolk, thus attracting the interest of the Bay of Bengal Programme (BOBP). As little is known of the state of the fishery, culture and trade. it was felt that a regional seminar might be an appropriate medium for an exchange of information among BOBP’s member countries. A seminar would also provide an opportunity to update knowledge of the industry. Southern Thailand, particularly the province of Surat Thani, has long been a centre for the capture and culture of the mud crab. With the proximity of the provincial brackishwater station and the opportunity to observe the industry first-hand; the town of Surat Thani promised to be an ideal venue for the seminar. And so, BOBP, in collaboration with the Department of Fisheries (DOCF) of the Government of Thailand, convened the seminar from November 5 to 8, 1991 Representatives from all the BOBP member countries, as well as the Philippines, Australia and U.S.A., attended. Aquaculturists, scientists, businessmen, socio-economists, feed manufacturers and development strategists were among the 54 participants. There were five sessions: Biol ogy and natural resources. Seed supply, Culture, Trade and a combined session with focus on Extension, Credit and Economic. During these sessions, 22 papers a nd six backgrounders were presented. To our knowledge, this was the first seminar in the region, and perhaps the world, devoted exclusively to the mud crab.
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    International trade 1971
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    Crab is sold alive, cooked fresh or frozen, and as canned product. It may be sold as whole crab, partially eviscerated, leg and claws, sections, and meats. The primary components that appear in foreign commerce are cooked frozen and canned product. Only a few of the world's many species of crab are of importance in the world market. The most important species are King (Paralithodes camtschaticus), snow (Chionoecetes opilio), Dungeness (Cancer magister), Korean (Erimacrus isenbeckii) blue swimmer (Portunus pelagicus) and mud crab (Scylla serrata). The biological characteristics of crab put certain constraints on the method of capture, how they are held, processed, and transported to market. It is essential to capture them with a method that does not cause bodily injury or the loss of appendages. Crab must be kept alive after capture and in a healthy condition up to the time of processing. The season and/or time of capture is very important as the quality and yield of post-molt crabs are low. The relatively low yields on crab dictate that their processing into fresh, frozen, or canned product should be at or near the point of landings or on board factory ships, Dungeness and snow crab yields are about 25%, king crab about 20% and blue crab about 15 or 16% of live weight. Crabs are harvested with a number of different types of gear. King and snow are taken with tangle nets and pots, Dungeness with pots, and blue crab with dredges, trotlines, pots and otter trawls. Landings rose steadily from 247.000 tons in 1960 to 380.000 tons in 1968. They dropped to 358.000 in 1969. Three countries - United States, Japan, and USSR - have dominated the landings over this period and they accounted for about 80% of the total. Four species of crab - king, blue, snow, and Dungeness - dominated the landings and, in the aggregate, account for approximately 74% of the total production. The most productive area in the world for crab is the north Pacific which in 1968, produced about 60% of a ll the crab taken in the world. The export trade, which is primarily in the canned form is dominated by two countries: USSR and Japan. Over the period 1960 to 1969, they accounted for approximately 95% of all exports.

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