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Parasites of grouper (Epinephelus coioides) cultured in Thailand

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Date
2005-03
Author
Chinabut, Supranee
Lerssutthichawal, Theerawoot
Laoprasert, Thitiporn
Page views
2,140
Subject
parasites ASFA
grouper culture ASFA
intensive aquaculture ASFA
cage culture ASFA
blood ASFA
mucus ASFA
cysts ASFA
histology ASFA
water quality ASFA
water samples ASFA
water transparency ASFA
groupers AGROVOC
Epinephelus coioides AGROVOC
Thailand AGROVOC
Protozoa AGROVOC
Monogenea AGROVOC
Digenea AGROVOC
Crustacea AGROVOC
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Abstract
Orange-spotted grouper (Epinephelus coioides) cultured in Thailand were examined for their parasites. There were five parasitic groups found in this investigation, viz., protozoans (four genera), monogeneans (five genera), digeneans (three genera), nematodes (two genera), and crustaceans (two genera). Two ciliated protozoans, Trichodina sp., Cryptocaryon irritans, and a single species of Amyloodinium sp. (flagellated protozoan) were observed externally on the gills and skin, while Sphaerospora sp. (myxozoan) was found to parasitize the kidney tubules of fish samples. Eight species of monogeneans were found, viz., Diplectanum grouperi, Pseudorhabdosynochus coioidesis, P. lantauensis, P. epinepheli, Haliotrema sp., two undescribed species of Pseudorhabdosynochus, Megalocotyloides sp. from the gills, and one species of monogenean, Benedenia epinepheli, from the skin. Digeneans, Aphanurus stossichi and Prosorhynchus pacifica, were found in the alimentary tract and a species of didymozoid, Gonapodasmius epinepheri, was present as yellow cysts attached to the gill filament. Two species of rare Philometra sp. and anisakid larva were observed on the body wall near the rectum and in the intestine, respectively. Two groups of crustaceans were found as external parasites, Caligus (copepod) and Rhaxanella (isopod). Monogeneans seemed to be major parasites of orange-spotted grouper in this study, which was indicated by great numbers and occurrence of Diplectanum epinepheli. There was no significant difference in parasite abundance among their own groups during the sampling period. Overall water quality parameters studied were stable, except transparency that fluctuated depending on the rainfall and tide. The occurrence of monogeneans showed correlation to water transparency. All fish samples showed no abnormal sign or symptom caused by parasitic infection.
URI
http://hdl.handle.net/10862/5932
Suggested Citation
Chinabut, S., Lerssutthichawal, T., & Laoprasert, T. (2005). Parasites of grouper (Epinephelus coioides) cultured in Thailand. In K. Nagasawa (Ed.), Recent Advances in Diagnosis and Prevention of Fish and Shrimp Diseases in Southeast Asia (pp. 267–279). Tigbauan, Iloilo, Philippines: Aquaculture Department, Southeast Asian Fisheries Development Center.
Type
Book chapter
ISBN
9718511732
Collections
  • Recent Advances in Diagnosis and Prevention of Fish and Shrimp Diseases in Southeast Asia [43]

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