Area Oceanografía Química, Instituto Argentino de Oceanografía, Complejo Científico-Tecnológico Bahía Blanca, 8000, Bahía Blanca, Argentina.
Arch Environ Contam Toxicol. 2010 Apr;58(3):746-56. doi: 10.1007/s00244-009-9405-9. Epub 2009 Oct 23.
Cadmium, chromium, copper, and manganese concentrations were determined in hepatopancreas of both sexes as well as in eggs at different embryonic development stages of the burrowing crab Neohelice granulata (Brachyura, Varunidae) from Mar Chiquita Coastal Lagoon, a biosphere reserve from Argentina, during a period of 1 year, to assess the bioaccumulation of metals associated with sex and seasonality. Furthermore, metal levels in associated superficial sediment samples were also determined. Two different "cangrejales," one in a mudflat and another one in a salt marsh, were studied. The results showed high concentrations of copper within the hepatopancreas, which was considered a strong reflection of high exposure of N. granulata to this metal. Metal accumulation in hepatopancreas from both study sites and sexes did not present significant differences, as did seasonality. In this sense, both spring and summer metal levels in hepatopancreas were the greatest. Eggs did not present differences in metal accumulation, with the exception of manganese, between sites or between crabs at different embryonic stages. For this metal, eggs from female crabs inhabiting mudflats showed higher levels than those from inhabiting salt marshes. Moreover, eggs in the late embryonic stage also showed the highest manganese concentrations. Metal levels in sediments, however, were similar in both sites. These are the first results of metal level in biota and sediments in this particular environment. Such results could be used as a baseline for the monitoring of metal levels in future studies in Mar Chiquita Coastal Lagoon.
镉、铬、铜和锰的浓度在雌雄两性的肝胰腺以及处于不同胚胎发育阶段的 Neohelice granulata（短尾蟹科）的卵中被测定，该短尾蟹来自阿根廷的生物圈保护区马奇奎塔沿海泻湖，为期 1 年，以评估与性别和季节性相关的金属的生物累积。此外，还测定了相关表层沉积物样本中的金属水平。研究了两个不同的“cangrejales”（一种在泥滩，另一种在盐沼）。结果表明，肝胰腺中的铜浓度很高，这强烈反映了 N. granulata 对这种金属的高度暴露。来自两个研究地点和性别的肝胰腺中的金属积累没有表现出显著差异，季节性也没有差异。在这个意义上，肝胰腺中的金属水平在春季和夏季都是最大的。除了锰之外，卵在金属积累方面在不同地点或不同胚胎阶段的螃蟹之间没有差异。对于这种金属，栖息在泥滩上的雌性螃蟹的卵比栖息在盐沼上的卵显示出更高的水平。此外，晚期胚胎阶段的卵也显示出最高的锰浓度。然而，沉积物中的金属水平在两个地点相似。这些是该特定环境中生物群和沉积物中金属水平的第一批结果。这些结果可用于马奇奎塔沿海泻湖未来研究中金属水平监测的基线。
