Impacts of Overfishing on Fisheries
AN OVERVIEW OF THE SOCIAL AND ECONOMIC IMPACT AND MANAGEMENT OF FISH AND SHRIMP
DISEASE IN BANGLADESH, WITH AN EMPHASIS ON SMALL-SCALE AQUACULTURE
M.A. Mazid and A.N.H. Banu
Bangladesh Fisheries Research Institute
Mymensingh-2201, Bangladesh
Mazid, M.A., and A.N.H. Banu. 2002. An overview of the social and economic impact and management of fish and shrimp disease in Bangladesh, with an emphasis on small-scale aquaculture. p. 21-25. In: J.R. Arthur, M.J. Phillips, R.P. Subasinghe, M.B. Reantaso and I.H. MacRae. (eds.) Primary Aquatic Animal Health Care in Rural, Small-scale, Aquaculture Development. FAO Fish. Tech. Pap. No. 406.
ABSTRACT
In Bangladesh, increasing population pressure, with increased demand for fish, has made fisheries a lucrative sector for the present generation. Fish culture in the country has been progressing towards semi-intensive culture, while shrimp culture moves towards an improved traditional system. However, indiscriminate and unplanned use of feed and fertiliser, with subsequent effects on water quality in pond ecosystems correspondingly increases stress on fish and accelerates susceptibility to pathogens. The effects of disease in improved culture systems are significant; however, proper systematic information on disease outbreaks is not yet available. The most obvious effect of the occurrence of disease is mortality, followed by economic losses. Mass mortalities of carp fry and fingerlings due to protozoan and metazoan parasites are frequently reported. A small initial infection gradually leads to a serious outbreak of disease, resulting in large mortalities and great economic loss for small-scale farmers. The most common disease problem in the country is epizootic ulcerative syndrome (EUS). There is a lack of technical knowledge in the management of shrimp farming. In Bangladesh, outbreaks of disease in shrimp caused by white spot syndrome virus (WSSV) (reported as systemic epidermal and mesodermal baculovirus -SEMBV)
DISEASE IN BANGLADESH, WITH AN EMPHASIS ON SMALL-SCALE AQUACULTURE
M.A. Mazid and A.N.H. Banu
Bangladesh Fisheries Research Institute
Mymensingh-2201, Bangladesh
Mazid, M.A., and A.N.H. Banu. 2002. An overview of the social and economic impact and management of fish and shrimp disease in Bangladesh, with an emphasis on small-scale aquaculture. p. 21-25. In: J.R. Arthur, M.J. Phillips, R.P. Subasinghe, M.B. Reantaso and I.H. MacRae. (eds.) Primary Aquatic Animal Health Care in Rural, Small-scale, Aquaculture Development. FAO Fish. Tech. Pap. No. 406.
ABSTRACT
In Bangladesh, increasing population pressure, with increased demand for fish, has made fisheries a lucrative sector for the present generation. Fish culture in the country has been progressing towards semi-intensive culture, while shrimp culture moves towards an improved traditional system. However, indiscriminate and unplanned use of feed and fertiliser, with subsequent effects on water quality in pond ecosystems correspondingly increases stress on fish and accelerates susceptibility to pathogens. The effects of disease in improved culture systems are significant; however, proper systematic information on disease outbreaks is not yet available. The most obvious effect of the occurrence of disease is mortality, followed by economic losses. Mass mortalities of carp fry and fingerlings due to protozoan and metazoan parasites are frequently reported. A small initial infection gradually leads to a serious outbreak of disease, resulting in large mortalities and great economic loss for small-scale farmers. The most common disease problem in the country is epizootic ulcerative syndrome (EUS). There is a lack of technical knowledge in the management of shrimp farming. In Bangladesh, outbreaks of disease in shrimp caused by white spot syndrome virus (WSSV) (reported as systemic epidermal and mesodermal baculovirus -SEMBV)
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