Is it worth having an adequate energetic state so as to detoxify a pesticide?

LAINO ALDANA; TRABALON MARIE; CUNNINGHAM MÓNICA; MOLINA GABRIEL; ROMERO SOFIA; GARCIA FERNANDO

Congreso; XXI International Congress of Arachnology; 2019

The use of pesticides for plague control impacts on ecosystems affecting directly or indirectly non-target organisms such as spiders. Its response in the face of xenobiotics depends, among other factors, on its energetic state, which is a reflection of its metabolic state. The present work studies how the energetic state of Polybetes pythagoricus is in different metabolic situations (females before and after vitellogenesis, juvenile, and adult males), how cypermethrin affects mortality and the enzyme activity of the antioxidant system and lipid peroxidation. As a result of the present study, it was observed that in females before and after vitellogenesis, the calories provided by glycogen and the lipids were 38.1 and 22.4 cal/gr. For the case of males, it was 33.4 cal/gr and 56.1 cal/gr for juveniles. The triacylglyceride/free fatty acid relation determined that juveniles have higher lipid dynamics. LD50 corresponding to females before and after vitellogenesis was 969 and 1108 ngr/gr, 1060 ngr/gr for males and 103 ngr/gr for juveniles. In exposed adult spiders, it was observed an increase of 0.8 to 5.5 times in the superoxide-dismutase activity in relation to control. For catalase, no increase was observed in males, but it was observed in females. Lipid peroxidation showed an increase in adults of 0.5 times. Although juveniles have a great caloric content, no increase was observed in the superoxide-dismutase activity and catalase, coinciding with the great increment observed in the lipid peroxidation (14 times) produced by the reactive oxygen species.