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The incidence of suspected white spot syndrome virus in semi‐intensive and extensive shrimp farms in B angladesh: implications for management
Author(s) -
Karim Manjurul,
Sarwer Rayhan Hayat,
Brooks Alan C.,
Gregory Rick,
Jahan Murshed E.,
Belton Ben
Publication year - 2012
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/j.1365-2109.2011.02939.x
Subject(s) - white spot syndrome , shrimp , biology , penaeus monodon , shrimp farming , fishery , stocking , aquaculture , tiger , veterinary medicine , oreochromis , agricultural science , microbiology and biotechnology , fish <actinopterygii> , medicine , computer security , computer science
The study was conducted to assess key factors influencing suspected white spot syndrome virus ( WSSV ) disease and associated shrimp production and economic performance in three contrasting black tiger shrimp ( P enaeus monodon ) culture technologies promoted by the U nited S tates Agency for International Development funded S hrimp Quality Support Project ( SQSP ) in B angladesh. A total of 350 traditional, 315 Modified Traditional Technology1 ( MTT 1), 36 MTT 2 and 88 Closed System Technology ( CST ) farmers from 10 sub‐districts in three districts of K hulna division were surveyed following random sampling at the end of the project. Binomial probit regression analysis revealed that smaller newly constructed ponds (known locally as gher ) were less susceptible to WSSV , provided aquatic weeds were controlled using chemicals. Removal of sludge from ghers also had a positive effect, irrespective of technology and location. It was also shown that stocking of screened shrimp postlarvae ( PL ) does not guarantee protection against WSSV ( t = 1.39, P > 0.05). Higher shrimp production was obtained by farmers practicing CST , followed by those operating MTT s and traditional technology respectively. Farmers who adopted CST also gained higher profitability followed by those operating MTT 1, MTT 2 and traditional technology.