The dinoflagellate Cochlodinium polykrikoides isolated from Bahı´a de La Paz, Gulf of California, showed an important short-term toxic effect on the spotted rose snapper Lutjanus guttatus. This microalga was able to decrease fish liver catalase activity and lipid peroxidation. Fish exposed to live dinoflagellates developed an abnormal mucus secretion on the gills that was directly related to algal cell concentration. Hepatic catalase inhibition and an increase in mucus secretion on the gills occurred when fish were exposed to 2 3 106 cells L–1 of C. polykrikoides. Lipid peroxidation was significantly different at 4 3 106 cells L–1 and the hepatosomatic index decreased at 3 3 106 cells L–1. Our results suggest that oxidative stress contributes, at least in part, to the ichthyotoxic effect of C. polykrikoides from the Gulf of California.

Item Type:	Refereed Article
Keywords:	Cochlodinium polykrikoides, dinoflagellate, toxicity, harmful algal bloom
Research Division:	Biological Sciences
Research Group:	Ecology
Research Field:	Marine and Estuarine Ecology (incl. Marine Ichthyology)
Objective Division:	Animal Production and Animal Primary Products
Objective Group:	Fisheries - Aquaculture
Objective Field:	Aquaculture Fin Fish (excl. Tuna)
UTAS Author:	Dorantes Aranda, JJ (Dr Juan Dorantes Aranda)
ID Code:	91568
Year Published:	2010
Web of Science® Times Cited:	14
Deposited By:	IMAS Research and Education Centre
Deposited On:	2014-05-22
Last Modified:	2014-06-16
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