Efectos letales y subletales del pesticida Azadiractina sobre los estadios larvarios de Arctodiaptomus salinus (Copepoda: Calanoida)
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2019-06-13
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Jaén: Universidad de Jaén
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[ES] Recientemente se ha demostrado que uno de los contaminantes mayoritarios en los humedales de Jaén son los pesticidas usados en la agricultura. Como alternativa son cada vez más estudiados los pesticidas ecológicos. Uno de ellos es la Azadiractina, debido a su fácil y rápida degradación. A pesar de esto, son muy escasos los estudios de los efectos de este pesticida, especialmente en copépodos. Estos crustáceos son organismos esenciales en las cadenas tróficas de sistemas acuáticos.
Nuestro experimento se centra en los efectos letales y subletales de la Azadiractina en la fase naupliar del copépodo calanoida Arctodiaptomus salinus procedente de la Laguna Honda (Jaén). Tras exponer estos individuos a tres tipos de tratamiento (ausencia de pesticida, 3 µg/L y 6 µg/L) se ha comprobado que este pesticida tiene efectos tanto en la supervivencia como en los tiempos de desarrollo de las fases naupliares de estos organismos. Así mismo, se han observado cambios en la morfología y movimiento ante la exposición a este tóxico.
[EN] Research has recently pointed out the pesticides used in agriculture as sorne of the majar pollutants in the wetlands located in Jaén. As an alternative to these, ecological pesticides are increasingly being studied. One of them is Azadirachtin, due to its easy and rapid degradation. Nevertheless, research based on the effects of this pesticide is scarce, especially on copepods. These crustaceans are essential organisms in the trophic chains of aquatic systems. Our experiment focuses on the lethal and sublethal effects of Azadirachtin in the naupliar phase of the calanoid copepod Arctodiaptomus salinus from Laguna Honda (Jaén). After exposing these individuals to three types of treatment (absence of pesticide, 3 µg / L and 6 µg / L), it has been shown that this pesticide has effects on both the survival and the development time of the nauplii phases of these organisms. Furthermore, changes in morphology and movement have been observed when exposed to this toxic substance.
[EN] Research has recently pointed out the pesticides used in agriculture as sorne of the majar pollutants in the wetlands located in Jaén. As an alternative to these, ecological pesticides are increasingly being studied. One of them is Azadirachtin, due to its easy and rapid degradation. Nevertheless, research based on the effects of this pesticide is scarce, especially on copepods. These crustaceans are essential organisms in the trophic chains of aquatic systems. Our experiment focuses on the lethal and sublethal effects of Azadirachtin in the naupliar phase of the calanoid copepod Arctodiaptomus salinus from Laguna Honda (Jaén). After exposing these individuals to three types of treatment (absence of pesticide, 3 µg / L and 6 µg / L), it has been shown that this pesticide has effects on both the survival and the development time of the nauplii phases of these organisms. Furthermore, changes in morphology and movement have been observed when exposed to this toxic substance.