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Pens

Mud crabs can be grown in pens installed in existing mangroves for up to 3 months. The pen can be rectangular, square or irregular shape and the size ranges from 500-1,000 m2. The use of net enclosures in mangroves offers an alternative to pond culture. It also promotes a better image for brackishwater aquaculture that had been linked to the historical clear-cutting of mangroves to make way to ponds. Lean crabs may also be fattened using pens set in mangroves within 30-45 days. Mud crab pen culture is recommended in …

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Grow-out

Crabs are commonly cultured with fish in earthen brackishwater pond.  Cannibalism in crabs is reduced by lowering the stocking density and maximizing the space by stocking fish. Common combination of crab is milkfish. Crabs (15 g to 30 g) are stocked in the pond with fish and grown for 3 to 5 months. The culture period depends on the initial size of crabs and fish and the stocking density. Two or more crops may be done in a year, depending on the desired crab size at harvest. Procedure: Prepare pond …

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Nursery

Nursery is the intermediate phase between hatchery and grow-out. Crabs with 0.6-1.0 cm carapace width (CW) (Fig. 1) are cultured to 1.5-2.0 cm CW in net cages installed inside the pond (Fig. 2), in a pond fenced/lined with nets (Fig. 3), or in a pond provided with net fence along the dikes (Fig. 4). Some farmers prefer bigger crabs than 1.5-2.0 cm for stocking so crabs are further grown to 3.0-4.0 cm (Fig. 5) in ponds lined or fenced with nets or dikes installed with net fence (Phase 2) prior …

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Hatchery

Although the technology applies to all the three species of mud crab (Scylla serrata, S. tranquebarica, and S. olivacea) available in the Philippines, S. serrata or the giant/king crab has been the focus of culture in the hatchery/nursery and grow-out pond due to its economic viability. Procedure: Obtain healthy adult crabs 500-700 g for S. serrata and 320-500 g for S. tranquebarica and S. olivacea with orange ovaries (‘aligi’) and complete legs as source of broodstock from ponds or traders. Put crabs in an empty basin and pour seawater over …

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Mud crab

Why mudcrab culture?                                                                    High demand in local and export markets Large and good taste Polyculture with milkfsh, tilapia or siganids Easy to transport Culture in mangroves Investment for people’s cooperatives and fisherfolk organizations with tenure of mangrove area SEAFDEC/AQD’s work on mud crab   Studies on mud crab at the SEAFDEC/AQD started in 1977, but were soon …

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AQD hosts demo-workshop on library software

AQD hosted the “Demo-workshop on the KOHA integrated library system” held 10-11 December in Tigbauan, Iloilo. The 34 participants were from public secondary schools and libraries in Western Visayas; and the resource persons from the National Library of the Philippines. Topics included software modules on cataloguing, readers’ services, serials management, acquisitions and library administration. The demo-workshop was funded by the National Commission for Culture & the Arts (National Committee on Libraries & Information Services) and organized by the Philippine Librarians Association Inc (Region VI Council).

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Aquaculture for communities

Seven participants from Cambodia (1), Malaysia (1), Thailand (1), Vietnam (1), India (1), and the Philippines (2) completed SEAFDEC/AQD’s training course on “Community-based freshwater aquaculture for remote rural areas of Southeast Asia” that was held 26 November - 5 December at AQD’s station in Binangonan, Rizal, Philippines.

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Courses on food safety and land evaluation for fishpond development

AQD conducted an International training on food safety of aquaculture products which was held 12 - 16 November and a Training on conducting inventory and evaluation of public lands released for fishpond development purposes held 11-16 November  at SEAFDEC/AQD’s main station in Iloilo, Philippines.

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