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Efecto tóxico de DDT y endosulfan en postlarvas de camarón blanco, Litopenaeus vannamei (Decapoda: penaeidae) de Chiapas, México

Tipo de material: Artículo impreso(a) y electrónico Artículo impreso(a) y electrónico Idioma: Español Otro título:
  • Toxic efect of DDT and endosulfan in white shrimp postlarvae Litopenaeus vannamei (Decapoda: Penaeidae) from Chiapas, Mexico [Título paralelo]
Tema(s) en español: Clasificación:
  • AR/632.95097275 E3
Recurso en línea: Formatos físicos adicionales disponibles:
  • Disponible en línea
 En: Revista Biología Tropical volumen 53, número 1-2 (marzo-junio, 2005 ), páginas 141-151Nota de acceso: Acceso en línea sin restricciones Resumen:
Español

We analized acute toxicity in white shrimp (Litopenaeus vannamei) postlarvae exposed to two chlorinated pesticides, DDT and endosulfan, under laboratory conditions during 168 hours, with controlled temperature (29 ± 1°C), salinity (3 ±1‰) and pH (8 ± 1). Median lethal concentrations (LC50), "incipient" LC50, median lethal time (LT50) the "maximum acceptable concentration of the toxic compound" (MACT) and "the safety level" (SL) were determined. The concentration of the compounds at which organism growth was reduced by 5 and 50% (EC5 and EC50), as well as changes in oxygen consumption patterns were determined in the surviving postlarvae. They were very sensitive to both compounds and DDT was thrice as toxic as endosulfan. Growth rate decreased 50 % and 80 % with endosulfan and DDT, respectively, at the experimental pestice concentration. The low resistance of postlarvae to DDT and endosulfan suggests that additional inflow of these pesticides into the aquatic system could affect the rate of shrimp production in the area.

Número de sistema: 37869
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Artículos Biblioteca Chetumal Artículos (AR) ECOSUR AR 632.95097275 E3 002 Disponible 690113CB6460
Artículos Biblioteca Electrónica Recursos en línea (RE) ECOSUR Recurso digital ECO400378693144

Acceso en línea sin restricciones

We analized acute toxicity in white shrimp (Litopenaeus vannamei) postlarvae exposed to two chlorinated pesticides, DDT and endosulfan, under laboratory conditions during 168 hours, with controlled temperature (29 ± 1°C), salinity (3 ±1‰) and pH (8 ± 1). Median lethal concentrations (LC50), "incipient" LC50, median lethal time (LT50) the "maximum acceptable concentration of the toxic compound" (MACT) and "the safety level" (SL) were determined. The concentration of the compounds at which organism growth was reduced by 5 and 50% (EC5 and EC50), as well as changes in oxygen consumption patterns were determined in the surviving postlarvae. They were very sensitive to both compounds and DDT was thrice as toxic as endosulfan. Growth rate decreased 50 % and 80 % with endosulfan and DDT, respectively, at the experimental pestice concentration. The low resistance of postlarvae to DDT and endosulfan suggests that additional inflow of these pesticides into the aquatic system could affect the rate of shrimp production in the area. Español

Disponible en línea

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