Behavioral swimming effects and acetylcholinesterase activitychanges in Jenynsia multidentata exposed to chlorpyrifos and cypermethrin individually and in mixtures

BONANSEA, ROCÍO; WUNDERLIN, DANIEL ALBERTO; AMÉ, MARÍA VALERIA

ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY

ACADEMIC PRESS INC ELSEVIER SCIENCE

Lugar: Amsterdam; Año: 2016 vol. 129 p. 311 - 311

0147-6513

he pesticides cypermethrin (CYP) and chlorpyrifos (CPF) were found together in water bodies located in agricultural and urban areas. However, the impact to non-target biota from exposure to mixtures has received little attention. In the current study, we evaluated changes in swimming behavior and cholinesterase enzymes activity in Jenynsia multidentata, to investigate the possible effects of these insecticides individually and in mixtures. Moreover, differences between technical and commercial mixtures of the pesticides were evaluated. Females of J. multidentata were exposed over 96 h to CYP (0.04 and 0.4 µg L-1), CPF (0.4 and 4 µg L-1), individually and in a technical and commercial mixtures. Swimming behavior was recorded after 24 h and 96 h of exposure. Also, we measured cholinesterase enzymes activity in brain and muscle after 96 h of exposure. Exposure to CYP increased the exploratory activity of J. multidentata in the upper area of the aquarium. Fish exposed to CPF (4 µg L-1) sh