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Studies on white spot syndrome (WSS) in penaeid prawns from culture ponds at Cochin, India

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Relation http://eprints.cmfri.org.in/7137/
 
Title Studies on white spot syndrome (WSS) in penaeid prawns from culture ponds at Cochin, India
 
Creator Jose, Jasmin K
 
Subject Aquaculture
Theses
Farming/Culture
Prawn and Prawn fisheries
Fish Disease
 
Description The aquaculture of penaeid shrimp has grown from its experimental
beginnings roughly about three decades ago into a major industry which, on a
world wide basis, provides employment to hundreds of thousands of both skilled
and unskilled labourers, billions of U.S. dollars in revenue and a high quality
food product (Lightner and Redman, 1998). Factors, such as, increasing demand
and market value, introduction of new technologies in the prawn seed and feed
production and other modem culture techniques contribute to this rapid
development in the prawn culture industry, which in turn has been accompanied
by the appearance of diseases of both infectious and non infectious aetiologies.
Though the usage of the terms, prawns and shrimps has been much confusing, in
the present study both the terms are used analogously to refer to
marinelbrackishwater forms only. The occurrence and relative importance of
many of the penaeid diseases coincide with the type of culture system, i.e.,
extensive, semi intensive and intensive (based on the area of culture, stocking
density, feeding and management) practised. The latter two are greatly
employed on a commercial scale and hence have more prone to the unhealthy
conditions and thereby to various diseases. Many of the important penaeid
diseases are caused by organisms, that are part of the normal microflora and
fauna of penaeids. These organisms are opportunistic pathogens, that cause
diseases only under conditions that favour them over the host (Lightner, 1985,
1993).
The important infectious diseases of econoIDIc importance to the
cultured prawn are those with viral, rickettsial, bacterial, fungal, protistan and
metazoan aetiologies (Lightner, 1988, 1993; Brock and Lightner, 1990; Fulks
and Main, 1992; Johnson, 1995). A number of non infectious diseases are also
of importance to the industry, which include diseases due to environmental
stress, nutritional imbalances, toxicants and genetic factors (Lightner, 1988,
1996; Brock and Lightner, 1990; Brock, 1992; Johnson, 1995). Among all these,
viruses are the most important disease causing agents in the penaeid prawns
(Lightner, 1985).
 
Date 2001
 
Type Thesis
NonPeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/7137/1/TH-93_Jas.pdf
Jose, Jasmin K (2001) Studies on white spot syndrome (WSS) in penaeid prawns from culture ponds at Cochin, India. ["eprint_fieldopt_thesis_type_phd" not defined] thesis, Central Institute of Fisheries Education, Versova.