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Reproductive dysfunction in the edible oyster, Crassostrea madrasensis due to larval bucephalid infection – a case study

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Title Reproductive dysfunction in the edible
oyster, Crassostrea madrasensis due to
larval bucephalid infection – a case study
Not Available
 
Creator Chinnadurai,S
Sanil,N K
Suja,G
Vijayan,K K
 
Subject Indian backwater oyster
parasite
trematode
histopathology
sporocyst
parasitic castration
 
Description Not Available
The present case study provides an insight into the tissue level
pathological alterations inflicted by Bucephalus sp. infections in
the edible oyster, Crassostrea madrasensis. Oysters collected
during a routine study (from the oyster beds along the Southeast
coast of India during July 2012) was found to harbor larval
bucephalid infection. Though the prevalence of infection was
low (1.37%), the intensity of infection was high, rated as two on
the semi-quantitative scale. Infected oyster did not exhibit any
external manifestation, but the developing parasitic stages, after
replacing the host gonadal tissues have further spread to the
gills and digestive glands. Regions of gonadal tissues were
found packed with slender, branching sporocysts containing
germ balls and crecariae, destroying the acinar architecture of
the gonads. Immune responses like encapsulation against the
infective stages were totally absent. The altered acinar
architecture and reduced volume of the gonadal acini appeared
to be insufficient to support any gametic release, resulting in
gonadal dysfunction leading to parasitic castration of the host.
An increase in the prevalence of Bucephalus sp. infection in the
ecosystem could seriously hamper the reproductive potential of
the wild stocks of oysters, thereby affecting the viability of oyster
farming in the region.
Not Available
 
Date 2021-09-16T10:07:49Z
2021-09-16T10:07:49Z
2013
 
Type Article
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/63339
 
Language English
 
Relation Not Available
 
Publisher Journal of the Marine Biological Association