On the incidence of the sporozoan Thelohania Prox Duorara Iversen and manning in commercially important prawns at Madras

James, D B (1986) On the incidence of the sporozoan Thelohania Prox Duorara Iversen and manning in commercially important prawns at Madras. Journal of the Marine Biological Association of India, 28 (1&2). pp. 225-228.

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Abstract

In the commercial catches at Madras, Penaeus semisulcatus and P. indicus were seen to be affected by the sporozoan parasite Thelohania prox duorara Iversen and Manning. The incidence varies from 0.5 to 2%. Among the infected prawns 87% belong to P. semisulcatus onA \'i% to P. indicus. In both the species the infection starts after they reach a length of 130 mm. First, the parasite infests the gonad, then the liver and finally the body musculature. Both the sexes are more or less equally affected by the parasite. The infection becomes severe with advancing age. More number of diseased prawns were encountered during the night landings. A few specimens of P. monodon harvested at CMFRI Muthukadu Mariculture Farm near Madras were also seen to be affected by the parasite. Details regarding total length, weight, sex and degree of infection for a two-year period are discussed.

Item Type:Article
Uncontrolled Keywords:Thelohania; Duorara; Madras
Subjects:Fish and Fisheries > Fish Toxicology
Crustacean Fisheries > Prawn and Prawn fisheries
Divisions:CMFRI-Cochin > Marine Capture > Crustacean Fisheries
ID Code:1189
Deposited By:Geetha P Mrs
Deposited On:21 Jun 2010 16:07
Last Modified:21 Jun 2010 16:07
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