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A parasitological survey of slipper-cupped oysters (Crassostrea iredalei, Faustino, 1932) in the Philippines

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Date
2010
Author
Erazo-Pagador, Gregoria
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Abstract
This paper describes the first screening in the Philippines of slipper-cupped oysters (Crassostrea iredalei) for the presence of parasites. Slipper-cupped oysters were sampled at 2 sites in Ivisan, Capiz, from September to December 2007. Macroscopical and histological analyses were carried out in oyster tissues. Histological examination showed gregarine protozoan Nematopsis sp. as the most prevalent parasite (71.33% and 65.0%) at 2 sites with a moderate intensity of infection. Tylocephalum sp. cestode was found in the connective tissue around the digestive gland, with a prevalence of 60% and 52.3% in 2 sites, with a moderate intensity of infection. Digenean trematodes had a 37.80% prevalence at site 1 and a 22.45% prevalence at site 2. Ciliates were also observed with a prevalence of 18.75% (site 1) and 13% (site 2). The observed infection of oysters had no apparent effect on oyster production at these sites maybe due to low infestation levels or to the fact that the parasites have no pathological effect.
URI
http://hdl.handle.net/10862/2133
Suggested Citation
Erazo-Pagador, G. (2010). A parasitological survey of slipper-cupped oysters (Crassostrea iredalei, Faustino, 1932) in the Philippines. Journal of Shellfish Research, 29(1), 177-179.
DOI
10.2983/035.029.0111
Subject
connective tissue ASFA; digestive glands ASFA; infestation ASFA; marine invertebrates ASFA; new species ASFA; parasites ASFA; protists ASFA; screening ASFA; taxonomy ASFA; Philippines AGROVOC
Taxonomic term
Cestoda GBIF; Crassostrea iredalei GBIF; Nematopsis GBIF; Tylocephalum GBIF; Magallana bilineata GBIF
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