Effects of the organophosphorus pesticide Folisuper 600 (methyl parathion) on the heart function of bullfrog tadpoles, Lithobates catesbeianus (Shaw, 1802)

The aim of this work was to evaluate whether the heart function of bullfrog tadpoles (25 Gosner stage) is affected by their acute exposure (48 h) to a sub-lethal concentration (10 µg.L-1) of the active principle of the organophosphorus pesticide Folisuper 600R (methyl parathion - MP). Our results de...

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Bibliographic Details
Published in:Brazilian journal of biology 2015-11, Vol.75 (4 Suppl 1), p.S163-168
Main Authors: Costa, M J, Ribeiro, L R, Salla, R F, Gamero, F U, Alves, L M L M, Silva-Zacarin, E C M
Format: Article
Language:English
Subjects:
Animals
BIOLOGY
bullfrog tadpoles
cardiac performance
Heart - drug effects
Heart - physiopathology
Insecticides - toxicity
Larva - drug effects
Larva - growth & development
Larva - physiology
Lithobates catesbeianus (Rana catesbeiana)
methyl parathion
Methyl Parathion - toxicity
Rana catesbeiana - growth & development
Rana catesbeiana - physiology
Swimming
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Summary:The aim of this work was to evaluate whether the heart function of bullfrog tadpoles (25 Gosner stage) is affected by their acute exposure (48 h) to a sub-lethal concentration (10 µg.L-1) of the active principle of the organophosphorus pesticide Folisuper 600R (methyl parathion - MP). Our results demonstrated that MP causes not only a reduction in tadpoles' cardiac ventricular mass, resulting in a marked reduction in their cardiac twitch force, but also impairs their swimming performance, irrespective of increasing their heart rate. Together, these findings indicate that low and realistic concentration of MP have a negative impact on tadpoles' performance, jeopardizing their survival.
ISSN:1519-6984
1678-4375
1678-4375
DOI:10.1590/1519-6984.08314