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June 3, 2014


New Developments in Southern Java


The sandy southern coastal land of the island of Java, facing the rough seas of the Indian Ocean, is non-arable and has been lying idle for decades.  In June 2013, at a one-hectare site with six raceways, a group of entrepreneurs, led by Susilo Adi Mukamto, demonstrated that Penaeus vannamei shrimp farming could be successful and profitable.  The farmers stocked 200 postlarvae/m2 and harvested more than 2.5 metric tons of 58-per-kilo P. vannamei from a 1,000-m2 pond in 90 days.


At least 60 farmers and fishermen have joined Susilo and established 75 P. vannamei raceway ponds in the same area.  During the same period, at least 150 farmers in the adjacent areas copied some aspects of this concept and are now farming vannamei.  Many of the new farmers were traditional farmers or fishermen with no or little knowledge of shrimp farming.  Susilo’s group pioneered and guided them on the construction and technology in the sandy soils.


The design consists of raceway ponds (1,000 m2 to 1,500 m2) with sand banks and an asbestos divider running down the middle of the pond.  Thick polyethylene liners prevent seepage.  The supply of seawater, filtered by the coarse sand, comes from tube wells that are eight meters deep.


The design for the outlet is unique and ingenious.  The effluent water passes through a buried 75-cm diameter culvert, located 15 cm below the pond bottom.  The effluent flows into a treatment pond before being discharged into a river far from the inlet.


Information: Poh Yong Thong, General Manager of Nutrition and Technical Service in, PT Gold Coin, Indonesia (emails yt.poh@goldcoin-id and


Source: AQUA Culture AsiaPacific (Editor/Publisher, Zuridah Merican, email  Smallholder Vannamei Shrimp Farming in Raceway Ponds.  Poh Yong Thong.  Volume 10, Number 3, Page 2, May/June 2014.

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