Acute Toxicity of Endosulfan to the Non-target Organisms Hyalella curvispina and Cnesterodon decemmaculatus

HERNÁN MUGNI; ARIEL PARACAMPO; PABLO DEMETRIO; ANA SCALISE; MARINA SOLIS; SILVIA FANELLI; CARLOS BONETTO

BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY

SPRINGER

Lugar: Berlin; Año: 2015

0007-4861

Abstract Pesticide consumption in Argentina has steadilyincreased over the last two decades, while one of thesecompounds, namely endosulfan, is commonly found inenvironmental samples. Also the fish Cnesterodon decemmaculatusand the amphipod Hyalella curvispina arewidely distributed in agricultural areas of southern SouthAmerica. The aim of the present contribution was thereforeto determine the acute toxicity of endosulfan to bothorganisms, and compare it with species sensitivity distributions(SSD) and measured field concentrations. The48 h-LC50 (with 95 % confidence limits) were 1.8(1.6?2.1) lg/L for C. decemmaculatus and 16.4 (15.1?17.7) lg/L for H. curvispina. C. decemmaculatus was moresensitive than 74 % of fish based on the SSD. Endosulfanconcentrations in stream water reported in the literaturewere often higher than the C. decemmaculatus LC50. It mayhence be concluded that C. decemmaculatus is a suitablesentinel organism for ecotoxicological risk assessment inSouth America.