EFFECT OF COPPER ON THE RNA/DNA RATIO AT DIFFERENT TEMPERATURES IN JUVENILES OF PETENIA KRAUSSII (PISCES: CICLIDAE)
作者： Kyung S Chung , Mairin J Lemus
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摘要: ABSTRACT: The effect of temperature and copper on the RNA/DNA protein/DNA ratios Petenia kraussii juveniles was evaluated. Juveniles were acclimated for 15 days at temperatures 22°C 30°C later kept in aquaria containing concentrations 0.2 1.2 mg/L each 30 days. They then transferred to water no metal be detoxified. bioassays performed statically with renewal every 24 hours. levels decreased organisms 22°C, decrease being more noticeable exposed higher concentration. same response evidenced ratio. Copper had significant specimens 30°C, whereas a slight increase these parameters detected during first week. P. krassii juveniles, particularly those did not reach referent values after These results demonstrate that changes are determinant toxicity this species. Key words: ratio, copper, toxicity, RESUMEN: Se evaluo el efecto de la temperatura y cobre sobre relacion ARN/ADN proteinas/ADN en kraussi. Los fueron aclimatados durante dias temperaturas 22 30oC posteriormente colocados primero acuarios con dosis 0,2 1,2 para cada luego transferidos agua sin su depuracion. bioensayos se realizaron forma estatica renovacion horas. niveles disminuyeron los organismos expuestos 22oC, siendo mas pronunciado descenso mayor del metal. Este mismo comportamiento fue observado proteinas/ADN. No hubo un significativo ejemplares 30oC, mientras que m/L observo ligero incremento parametros primera semana. Estos resultados demuestran determina citotoxicidad llegaron alcanzar valores proteinas/ ADN similares controles despues depuracion, particularmente 30oC. Palabras clave: ARN/ADN, toxicidad, cobre,
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