Efectos sub-letales del plaguicida de origen natural Azadiractina sobre una especie zooplanctónica.
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2018-10-16
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Jaén: Universidad de Jaén
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[ES] El principal objetivo del presente trabajo es estudiar los posibles efectos sub-letales
del pesticida Tokai (Azadiractin 3,2% p/v; 32 g/L), pesticida autorizado en la agricultura
ecológica en España, sobre el copépodo calanoida Arctodiaptomus salinus. Los individuos
fueron expuestos a dos concentraciones del pesticida (6 µg / L; 12 µg / L) durante un periodo
de 15 días. Su efecto sobre el tamaño y el número de puestas sólo se detecta en la mayor de
las concentraciones de experimentación, esto es, a 12 µg/L. Sin embargo, en el tiempo de
desarrollo y la tasa de supervivencia naupliar se notan efectos significativos ya en la
concentración de 6 µg/L. Los resultados expuestos en esta memoria sugieren que
concentraciones de Azadiractina muy inferiores a la dosis legalmente permitida pueden tener
dramáticas consecuencias a nivel poblacional.
[EN] The main objective of this paper is to study the possible sub-lethal effects of the pesticide Tokai (Azadiractin 3.2% w / v; 32 g / L), an authorized pesticide in ecologic farming in Spain, on the calanoid copepod Arctodiaptomus salinus. IndividuaIs were exposed to two concentrations of the pesticide (6 µg / L, 12 µg / L) for a period of 15 days. The effects on the clutches size and number of clutches were only detected at the highest experimental concentration (12 µg / L). However, at the time of development and the nauplii survival rate, significant effects are already noticed in the concentration of 6 µg / L. The results presented in this report suggest that concentrations of Azadirachtin very inferior to the legally permitted dese can have dramatic consequences at the population level.
[EN] The main objective of this paper is to study the possible sub-lethal effects of the pesticide Tokai (Azadiractin 3.2% w / v; 32 g / L), an authorized pesticide in ecologic farming in Spain, on the calanoid copepod Arctodiaptomus salinus. IndividuaIs were exposed to two concentrations of the pesticide (6 µg / L, 12 µg / L) for a period of 15 days. The effects on the clutches size and number of clutches were only detected at the highest experimental concentration (12 µg / L). However, at the time of development and the nauplii survival rate, significant effects are already noticed in the concentration of 6 µg / L. The results presented in this report suggest that concentrations of Azadirachtin very inferior to the legally permitted dese can have dramatic consequences at the population level.