Sublethal concentrations of chlorpyrifos induce changes in the thermal sensitivity and tolerance of anuran tadpoles in the toad Rhinella arenarum?

FORNÉS, MIGUEL W.; SANABRIA, EDUARDO A.; TEJEDO, MIGUEL; QUIROGA, LORENA B.; BUSTOS, DANIEL A.

CHEMOSPHERE

PERGAMON-ELSEVIER SCIENCE LTD

Lugar: Amsterdam; Año: 2019 vol. 219 p. 671 - 677

0045-6535

Amphibians are considered one of the groups most susceptible to chemical contamination, therefore are good bio-indicators of aquatic pollution. Synergistic effects of temperature and pesticides have been found in amphibiansdetermining amplified toxicity effect on survival and malformations with increasing temperatures.We studied the sensitivity of sublethal concentrations of chlorpyrifos in Rhinella arenarum tadpoles over on two fitness related thermal traits: locomotor swimming performance and thermal tolerance limits (CTmax=critical thermal maximum and CTmin=critical thermal minimum). Our result shows a decrease in the locomotor performance of R. arenarum tadpoles with increasing sublethal chlorpyrifos concentrations. The experimental temperature increased locomotor performance but this being only significant for the control whereas tadpolesraised at any sublethal chlorpyrifos concentration did not increase their total swimming distance with temperature (Concentration×Temperature interaction, P