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Braz. j. med. biol. res ; 22(2): 269-73, 1989. ilus
Artigo em Inglês | LILACS | ID: lil-105585

RESUMO

The possibility of recovery in a hypertonic environment (10-40%NaCl) was investigated in the freshwater fish Oreochromis niloticus acutely intoxicated with the pesticide Malathion (40 ml/l. Survival was significantly higher in 15 g/l NaCl, with a shorter time required to reover posture and swimming, although 20% of revovered animals died on subsequent days.Exposure to a hypertonic environment plus pesticide did not protect the animals. Fish explosed to air until they became unresponsive recovered faster in freshwater than in a hupertnic environment. It os concluded that a hypertonic environmnet only facilitates recovery and that although osmotic mechanisms may explain the results, other possibilities reamin to be investigated


Assuntos
Animais , Feminino , Masculino , Peixes/fisiologia , Soluções Hipertônicas/farmacologia , Malation/toxicidade , Contração Muscular/efeitos dos fármacos , Exposição Ambiental , Pressão Osmótica
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