01786naa a2200217 a 450000100080000000500110000800800410001902200140006010000180007424501220009226000090021452011510022365000150137465000110138965300090140065300180140970000200142770000210144770000210146877300790148919429802013-01-10       2012    bl uuuu     u00u1 u    #d  a1678-26901 aPEDALE, A. B.  aAcute toxicity of sodium metabisulphite on mangrove crab Ucides cordatus (Decapoda, Ucididae).h[electronic resource]  c2012  aThe sodium metabisulphite salt is usually used in shrimp culture to prevent black spot. Unfortunately the toxicological effect of this xenobiotic in decapod crabs is unknown. Thus, the present study aims to investigate the sodium metabisulphite LC50?96 h in the mangrove species Ucides cordatus. Crabs were collected in the tidal creek margins in Bragança estuarine and were submitted to preliminary test (screening) and posterior definitive test. Crabs were exposed in five different concentrations and a control group in five replicates, two crabs per recipient (5 L) during 96 hours. A negative correlation was observed to sodium metabisulphite concentration in relation to dissolved oxygen and pH. At the end of the experiment were obtained the following mortality index in relation to sodium metabisulphite concentrations: 100% in 86.0 mg.L-1, 74% in 62.0 mg.L-1, 52% in 52.0 mg.L-1, 44% in 38.0 mg.L-1. The value of LC50 ? 96 h for U. cordatus was determinate at 42.58 mg.L-1/Na2S2O5. The results strongly indicate that sodium metabisulphite is toxic for U. cordatus, and this crab could be used for biomonitoring the environmental impact.  aCaranguejo  aMangue  aCrab  aMangrove crab1 aFUJIMOTO, R. Y.1 aSANTOS, R. F. B.1 aABRUNHOSA, F. A.  tAnais da Academia Brasileira de Ciênciasgv. 4, n. 4, p. 1009-1014, 2012.