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Payaos
A payaos is a type of fish aggregating device used in Southeast Asia, particularly in the Philippines. Payaos were traditionally bamboo rafts for handline fishing before World War II, but modern steel payaos use fish lights and fish location sonar to increase yields. While payaos fishing is sustainable on a small scale, the large scale, modern applications have been linked to adverse impacts on fish stocks.
== Traditional payaos ==
A traditional payaos is a simply constructed bamboo raft with a superstructure at or just below the waterline, most commonly constructed of palm fronds. Using hand-line fishing, fishermen take advantage of pelagic fish's attraction to floating objects. Large tuna can be caught in this manner at depths of under 300 meters, far shallower than by contemporary methods like purse seineing.〔 Wesley A. Armstrong and Charles W. Oliver, "Recent Use of Fish Aggregating Devices in the Eastern Tropical Pacific Tuna Purse-Seine Fishery: 1990-1994," Southwest Fisheries Science Center. (PDF ). Last accessed 20 December 2006〕 Before World War II anchored and drifting payaos were deployed in all Philippines regional
waters barring the east, where strong currents prohibited it.〔 Payaos are frequently anchored in the coastal waters, passively fishing for migrating fish.
The chronic overfishing of regional Philippine waters, combined with the low impact of shallow-water payaos fishing, has led to the establishment of the Tuna Productivity Project in Davao Gulf. This will encourage traditional and environmentally sound fishing, and aims to decrease the catch of juvenile fish.〔Malcolm I. Sarmiento, Jr and Cesar M. Drilon, Jr, "(Establishment of Tuna Productivity Project in Davao Gulf )," Republic of the Philippines (Department of Agriculture). Last accessed 20 December 2006〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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