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首页> 外文期刊>Environmental toxicology and chemistry >HYDROBIA ULVAE FEEDING RATES: A NOVEL WAY TO ASSESS SEDIMENT TOXICITY
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HYDROBIA ULVAE FEEDING RATES: A NOVEL WAY TO ASSESS SEDIMENT TOXICITY

机译：厌氧症患者的进食率：评估沉积物毒性的新方法

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摘要

Standard acute toxicity tests are widely used to assess contaminated sediments. However, such tests last 10 d or more and only provide information regarding lethality. Here, we present data concerning the use of a 28-d growth test and a 24-h test using feeding rate, as measured by egestion rate, of the marine snail Hydrobia ulvae. The test was used to assess the toxicity of estuarine sediments from a gradient of heavy metal contamination, and its sensitivity and ease of use were compared with those of 10-d tests using the amphipod crustacean Corophium volutator. Mortality of C. volutator and H. ulvae in 10-d lethal toxicity tests showed similar patterns of sensitivity. Lethality tests with both species showed no effects when carried out using sediments from a number of sites at which ecological impacts are known to occur. By contrast, growth over 28 d in H. ulvae was reduced at all sites where other studies have detected adverse ecological effects. Feeding rate after 24 h also was decreased at moderately contaminated sites where sediments were not acutely toxic, and it was a very good predictor of 28-d growth (r~2 = 0.74). Both tests were straightforward to carry out, so H. ulvae has considerable potential as a test organism for chronic toxicity.
机译：标准的急性毒性试验被广泛用于评估污染的沉积物。但是，此类测试可持续10天或更长时间，并且仅提供有关致死性的信息。在这里，我们介绍了有关使用28天生长测试和24小时测试的数据，该测试使用了喂食速率（通过蠕虫率测量）的海蜗牛Hydrobia ulvae。该测试用于评估重金属污染梯度对河口沉积物的毒性，并将其敏感性和易用性与使用两栖类甲壳类动物Corophium v​​olutator进行的10天测试进行了比较。在10天致命毒性试验中，C。volutator和H. ulvae的死亡率显示出相似的敏感性模式。当使用已知发生生态影响的许多地点的沉积物进行两种物种的致死性试验时，均未发现影响。相比之下，在其他研究已发现不利的生态影响的所有地点，H.ulvae超过28天的生长均减少。在沉积物没有剧毒的中度污染地点，24小时后的进食速度也降低了，这是一个很好的预测28天生长的指标（r〜2 = 0.74）。两项测试均很容易进行，因此，H。ulvae具有作为慢性毒性测试生物的巨大潜力。

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