Picone Marco, Bergamin Martina, Novelli Alessandra Arizzi, Noventa Seta, Delaney Eugenia, Barbanti Andrea, Ghirardini Annamaria Volpi
Department of Environmental Sciences, University of Venice, Campo della Celestia 2737/b, I-30122 Venice, Italy.
Ecotoxicol Environ Saf. 2008 May;70(1):174-84. doi: 10.1016/j.ecoenv.2006.06.005. Epub 2008 Feb 13.
The 96-h water-only exposure and 10-d sediment toxicity tests with the amphipod Corophium orientale were performed in order to enhance the knowledge about its overall sensitivity and its applicability to Venice Lagoon sediments. The values obtained with cadmium as reference toxicant demonstrated a certain variability of the LC(50); the higher value was found in spring and the lower in late summer. Tests with other pure chemicals (Ni, Total Ammonia, Sodium Dodecyl-Sulphate) showed good discriminatory power; the toxicity gradient observed was: Cd (LC(50) of 3.3 mg/L)>SDS (LC(50) of 8.7 mg/L)>total ammonia (LC(50) of 126mg/L)>Ni (LC(50) of 352 mg/L). Sediment toxicity test results were used to obtain information on non-treatment factors (grain-size, TOC content) that could act as confounding factors, and to develop a site-specific toxicity-score based on minimum significant difference approach. Confounding factors seem not to affect test results. The procedure to develop the toxicity score took into account the relatively lower sensitivity of C. orientale with respect to other amphipods commonly used in toxicity tests (Ampelisca abdita and Rhepoxynius abronius).
为了增进对东方蜾蠃蜚整体敏感性及其对威尼斯泻湖沉积物适用性的了解，对其进行了为期96小时的仅接触水试验以及为期10天的沉积物毒性试验。以镉作为参考毒物所获得的值显示出半数致死浓度（LC(50)）存在一定变异性；春季的值较高，夏末的值较低。用其他纯化学品（镍、总氨、十二烷基硫酸钠）进行的试验显示出良好的区分能力；观察到的毒性梯度为：镉（LC(50)为3.3毫克/升）>十二烷基硫酸钠（LC(50)为8.7毫克/升）>总氨（LC(50)为126毫克/升）>镍（LC(50)为352毫克/升）。沉积物毒性试验结果被用于获取可能作为混杂因素的非处理因素（粒度、总有机碳含量）的信息，并基于最小显著差异法制定特定场地的毒性评分。混杂因素似乎不会影响试验结果。制定毒性评分的程序考虑到了相对于毒性试验中常用的其他蜾蠃蜚（Ampelisca abdita和Rhepoxynius abronius）而言，东方蜾蠃蜚的敏感性相对较低。
