Efecto Ecotoxicologico Del Petróleo Crudo Sobre El Primer Estadio De Emerita Analoga Stimpson, 1857 (decápoda: Anomura) Ecotoxicological Effect of Crude Oil on the First Stage of Emerita Analoga Stimpson, 1857 (decapoda: Anomura)

Ecotoxicological effect of crude oil was evaluated in larvae zoea I of Emerita analoga. The samples were collected of the Cangrejos beach (05o08'30,02''-5o10'46,21'' SL and 81o10'35,04'81o10'24,0'' WL), Piura, Peru. Environmental parameters such as temperature, oxygen, pH and salinity were recorded in situ. The organisms were exposed at five concentrations of crude oil: -1 -1 -1 -1 -1 0,65 mg·L ; 1,30 mg·L ; 2,60 mg·L ; 5,20 mg·L and 10,40 mg·L with 3 replicates, were incubated in a thermoregulator table at a temperature of 20 ± 1oC, previously calibrated, the individuals did not feed throghout assay, the test was of static type and was carried out for 4 days. A daily count of the dead organisms was made, taking a registration every 24 h. Rate of mortality and environmental parameters as temperature, oxygen, pH and salinity was registered. It was determined that the median lethal concentration CL for the zoeas I of E. analoga, at 96 h of 50 -1 exhibition of crude oil was 1,33 mg·L . The results show that at the maximum experimental concentration of crude oil the species presents higher mortality.