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金属对淡水螺类——塔形黑螺的毒性

Toxicity of metals to a freshwater snail, Melanoides tuberculata.

作者信息

Shuhaimi-Othman M, Nur-Amalina R, Nadzifah Y

机构信息

School of Environmental and Natural Resource Sciences, Faculty of Science and Technology, National University of Malaysia-UKM, Selangor, 43600 Bangi, Malaysia.

出版信息

ScientificWorldJournal. 2012;2012:125785. doi: 10.1100/2012/125785. Epub 2012 Apr 24.

DOI:10.1100/2012/125785
PMID:22666089
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC3366189/
Abstract

Adult freshwater snails Melanoides tuberculata (Gastropod, Thiaridae) were exposed for a four-day period in laboratory conditions to a range of copper (Cu), cadmium (Cd), zinc (Zn), lead (Pb), nickel (Ni), iron (Fe), aluminium (Al), and manganese (Mn) concentrations. Mortality was assessed and median lethal times (LT₅₀) and concentrations (LC₅₀) were calculated. LT₅₀ and LC₅₀ increased with the decrease in mean exposure concentrations and times, respectively, for all metals. The LC(50) values for the 96-hour exposures to Cu, Cd, Zn, Pb, Ni, Fe, Al, and Mn were 0.14, 1.49, 3.90, 6.82, 8.46, 8.49, 68.23, and 45.59 mg L⁻¹, respectively. Cu was the most toxic metal to M. tuberculata, followed by Cd, Zn, Pb, Ni, Fe, Mn, and Al (Cu > Cd > Zn > Pb > Ni > Fe > Mn > Al). Metals bioconcentration in M. tuberculata increases with exposure to increasing concentrations and Cu has the highest accumulation (concentration factor) in the soft tissues. A comparison of LC₅₀ values for metals for this species with those for other freshwater gastropods reveals that M. tuberculata is equally sensitive to metals.

摘要

在实验室条件下,将成年淡水螺类瘤拟黑螺(腹足纲,蜒螺科)暴露于一系列不同浓度的铜(Cu)、镉(Cd)、锌(Zn)、铅(Pb)、镍(Ni)、铁(Fe)、铝(Al)和锰(Mn)环境中,为期四天。评估死亡率并计算半数致死时间(LT₅₀)和半数致死浓度(LC₅₀)。对于所有金属,LT₅₀和LC₅₀分别随着平均暴露浓度和时间的降低而增加。96小时暴露于Cu、Cd、Zn、Pb、Ni、Fe、Al和Mn的LC₅₀值分别为0.14、1.49、3.90、6.82、8.46、8.49、68.23和45.59 mg L⁻¹。Cu是对瘤拟黑螺毒性最大的金属,其次是Cd、Zn、Pb、Ni、Fe、Mn和Al(Cu > Cd > Zn > Pb > Ni > Fe > Mn > Al)。瘤拟黑螺体内金属的生物富集随着暴露浓度的增加而增加,并且Cu在软组织中的积累量最高(富集系数)。将该物种对金属的LC₅₀值与其他淡水腹足类动物的LC₅₀值进行比较,结果表明瘤拟黑螺对金属同样敏感。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1e76/3366189/bdc75ea5f1c6/TSWJ2012-125785.003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1e76/3366189/a88680d470fe/TSWJ2012-125785.001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1e76/3366189/099dac2cc046/TSWJ2012-125785.002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1e76/3366189/bdc75ea5f1c6/TSWJ2012-125785.003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1e76/3366189/a88680d470fe/TSWJ2012-125785.001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1e76/3366189/099dac2cc046/TSWJ2012-125785.002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1e76/3366189/bdc75ea5f1c6/TSWJ2012-125785.003.jpg

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