INALI   02622
INSTITUTO NACIONAL DE LIMNOLOGIA
Unidad Ejecutora - UE
artículos
Título:
Survival and growth of Palaemonetes argentinus (Decapoda; Caridea) exposed to insecticides with chlorpyrifos and endosulfan as active element.
Autor/es:
MONTAGNA M.; COLLINS P.
Revista:
ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY
Editorial:
Springer
Referencias:
Lugar: Nueva York; Año: 2007 vol. 53 p. 371 - 378
ISSN:
0090-4341
Resumen:
Abstract: Pesticides with chlorpyrifos and endosulfan as active element are used for pest control on agricultural lands with high risks input in aquatic systems. The acute toxicity of these insecticides in the freshwater prawn Palaemonetes argentinus was evaluated. The results were used to determine the lowest observed effect concentration (LOEC) and the no observed effect concentration (NOEC). Individual growth of prawn in relation to chlorpyrifos and endosulfan exposure was analyzed. LC50 were 2.98 ìg L-1 and 14.10 ìg L-1 at 24 hr, and 0.49 ìg L-1 and 6.28 ìg L-1 at 96 hr of chlorpyrifos and endosulfan, in their commercial products. The size increment of prawns was the same in all treatments, in which cephalothorax length (CL) increased linearly per molt. The intermolt period was influenced by the toxic effect of pesticides during rearing time, decreasing with the molt cycles compared with the normal growth pattern. The results suggest that juveniles of Palaemonetes argentinus are sensitive to chlorpyrifos and endosulfan pollution.