Acute toxicity of sodium metabisulphite on mangrove crab Ucides cordatus (Decapoda, Ucididae).

Anais da Academia Brasileira de Ciencias (2012-09-20)
Adriana B Pedale, Rodrigo Y Fujimoto, Rudã F B Santos, Fernando A Abrunhosa

The 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 LC(50) - 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 LC(50) - 96 h for U. cordatus was determinate at 42.58 mg.L(-1)/Na(2)S(2)O(5). The results strongly indicate that sodium metabisulphite is toxic for U. cordatus, and this crab could be used for biomonitoring the environmental impact.

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Sodium metabisulfite, ReagentPlus®, ≥99%
Sodium metabisulfite, reagent grade, 97%
Sodium metabisulfite, puriss. p.a., ACS reagent, reag. Ph. Eur., dry, 98-100.5%
Sodium metabisulfite, analytical standard
Sodium metabisulfite, puriss., meets analytical specification of Ph. Eur., BP, NF, FCC, E223, dry, 97-100.5%
Sodium metabisulfite, tested according to Ph. Eur.
Sodium metabisulfite, anhydrous, free-flowing, Redi-Dri, ReagentPlus®, ≥99%