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Behavioral effects of waterborne carbofuran in goldfish


Archives of Environmental Contamination & Toxicology 31(2): 232-238
Behavioral effects of waterborne carbofuran in goldfish
The effects of concentration (1, 10, 100 mu-g/L) and duration (4, 8, 12 h) of exposure to carbofuran were assessed on the swimming activity, social interactions, and behavioral responses of goldfish to a flow (0.1 L/min) of water, with or without chironomids. Observations were also made on the behavioral responses of unexposed goldfish to a flow (0.1 U min) of carbofuran-contaminated water. A 4-h exposure of goldfish 1 mu-g/L carbofuran produced a significant increase in sheltering, burst swimming, and nipping. Responses were enhanced at 100 mu-g/L. After a 12-h exposure, the behavioral effects of 1 mu-g/L carbofuran were less apparent. However, burst swimming at 10 mu-g/L, and sheltering, nipping and burst swimming at 100 mu-g/L, were still significantly increased after a 12-h exposure to carbofuran. Grouping was not consistently affected by exposure conditions. Chemical attraction to a filtrate of chironomids was significantly reduced after the 4-h exposure to 1 mu-g/L carbofuran. Decreased attraction to the food extract was less apparent after the 12-h exposure, except at 100 mu-g/L carbofuran. A significant decrease in attraction to a flow of uncontaminated water was also observed after a 4-h exposure to 10 and 100 mu-g/L carbofuran. Unexposed goldfish did not show avoidance reaction to a flow of carbofuran-contaminated water, even at a concentration (10 mg/L) exceeding the mean 96-h LC-50 in cyprinids (10.5-1 mg/L). However, at all concentrations tested (0.1, 1, 10 mg/L), goldfish quickly reacted to the introduction of the solution of carbofuran by increased burst swimming and nipping. These results are discussed in the light of the data concerning behavioral and neurotoxic effects of carbamate and organophosphorus insecticides in fish.

Accession: 002763482

PMID: 8781074

DOI: 10.1007/bf00212371

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