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White spot syndrome virus (WSSV) risk factors associated with shrimp farming practices in polyculture and monoculture farms in the Philippines

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Date
2011
Author
Tendencia, Eleonor
Bosma, Roel H.
Verreth, Johan A. J.
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Abstract
White spot sydrome virus (WSSV) is one of the most important viral disease of shrimp. Several studies to control the disease have been done. Tank experiments identified WSSV risk factors related to the physico chemical properties of the water. A few studies reported pond level WSSV risk factors. This study identifies the risk factors associated with essentially two different farming systems: polyculture and semi-intensive monoculture of Penaeus monodon. Data were gathered from a total of 174 shrimp farmers in eight provinces of the Philippines using a structured questionnaire. Forty-seven variables related to pond history and site description, period of culture, pond preparation techniques, water management, culture methods, feed and other inputs, and biosecurity measures were investigated. In the analysis for combined monoculture and polyculture farms, feeding live molluscs was identified as important WSSV risk factors. In addition to feeding live molluscs, sharing of water source with other farms, having the same receiving and water source, larger pond size, and higher stocking density were identified as important WSSV risk factors in monoculture farms. Climate, i.e. stocking during the cold months and sludge removal and its deposition on the dikes were identified as WSSV risk factors in polyculture farms. Protective factors, listed in decreasing significance, were feeding with planktons and high mangrove to pond area ratio, both observed in the dataset with both monoculture and polyculture farms, while only the latter was observed in the dataset for monoculture farms only. No protective factor was observed in the dataset for polyculture farms.

This study confirmed the negative effect of sharing water source with other farms and identified several new factors influencing WSSV infection such as feeding live molluscs increases the risk, while feeding with planktons and high mangrove to pond area ratio reduce the risk.
URI
http://hdl.handle.net/10862/2120
Suggested Citation
Tendencia, E., Bosma, R. H., & Verreth, J. A. J. (2011). White spot syndrome virus (WSSV) risk factors associated with shrimp farming practices in polyculture and monoculture farms in the Philippines. Aquaculture, 311(1-4), 87-93.
DOI
10.1016/j.aquaculture.2010.11.039
Subject
mangroves ASFA; marine molluscs ASFA; plankton surveys ASFA; polyculture (aquaculture) ASFA; pond culture ASFA; ponds ASFA; shellfish culture ASFA; shrimp culture ASFA; Mollusca; Penaeus monodon; monoculture AGROVOC; White spot syndrome virus; Philippines; Farm management; Risk factors
Taxonomic term
Penaeus monodon
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