TOXICITY OF THREE ORGANOPHOSPHORUS INSECTICIDES IN ANURAN EMBRYOS AT DIFFERENT TEMPERATURES.
In anurans, the effects of different agrochemicals and temperature have been recurrent topics in research; however, these variables are addressed independently without considering that they can exert a simultaneous pressure on the species. For this reason, this work aims to determine the toxicity (through the Medium Lethal Concentration -LC50) of the organophosphate insecticides: chlorpyrifos, diazinon and monocrotophos, under three thermal regimes (23, 28 and 33 ± 1 °C) on embryos of three species of anurans. According to the LC50values, the chlorpyrifos insecticide was the most toxic, followed by diazinon and monocrotophos. On the other hand, an increase in the toxicity of the organophosphate insecticides studied was generally found at the highest experimental temperature (33 °C). In addition, the effect of temperature became more noticeable for the organisms exposed to chlorpyrifos, the most lethal insecticide. These results suggest a negative effect for the aquatic fauna of anurans due to the current excessive use of this type of agrochemicals and their interaction with environmental temperature. According to the LC50 values, the chlorpyrifos insecticide was the most toxic, followed by the diazinon and monocrotophos. On the other hand, an increase in the toxicity of the organophosphorus insecticides studied was generally found at the highest experimental temperature (33 °C). In addition, the effect of temperature became more noticeable for the organisms exposed to chlorpyrifos, the most lethal insecticide. This result suggests a negative effect for the aquatic fauna of anurans due to the current excessive use of this type of agrochemicals and their interaction with the environmental temperature.
| Main Authors: | , , , |
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| Format: | Digital revista |
| Language: | spa |
| Published: |
Universidad Nacional de Colombia - Sede Bogotá - Facultad de Ciencias - Departamento de Biología
2020
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| Online Access: | https://revistas.unal.edu.co/index.php/actabiol/article/view/78618 |
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