Toxic effect of the harmful dinoflagellate Cochlodinium polykrikoides on the spotted rose snapper Lutjanus guttatus.
The dinoflagellate Cochlodinium polykrikoides isolated from Bahía 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 x 10(6) cells L(-1) of C. polykrikoides. Lipid peroxidation was significantly different at 4 x 10(6) cells L(-1) and the hepatosomatic index decreased at 3 x 10(6) 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.
Postgrado en Ciencias del Mar y Limnología, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de Mexico (UNAM), Unidad Académica Mazatlán, Apdo. Postal 811, Mazatlán, Sinaloa 82040, Mexico. juanjodorantes@yahoo.com.mx
Juan José
JJ
Dorantes-Aranda
Luz María
LM
García-de la Parra
Rosalba
R
Alonso-Rodríguez
Lourdes
L
Morquecho
Domenico
D
Voltolina
D000818:Animals; D002140:California; D004141:Dinoflagellida / Q000472:pathogenicity*; D005399:Fishes / Q000469:parasitology*; D005880:Gills / Q000002:abnormalities; D057097:Harmful Algal Bloom; D015227:Lipid Peroxidation; D008387:Marine Toxins / Q000633:toxicity*; D009093:Mucus; D018384:Oxidative Stress; D012623:Seawater
D008387:Marine Toxins