Effect of Chronic Sublethal Exposure of Major Heavy Metals on Filtration Rate, Sex Ratio, and Gonad Development of a Bivalve Species
Effect of Chronic Sublethal Exposure of Major Heavy Metals on Filtration Rate, Sex Ratio, and Gonad Development of a Bivalve Species
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DOI：
10.1007/s00128-013-1138-9
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发表时间：
2014-01-01
影响因子：
2.7
通讯作者：
Yang, S. B.
中科院分区：
文献类型：
--
作者：
Liu, G. X.;Shu, M. A.;Yang, S. B.
以泥蚶（Tegillarca granosa）为材料，研究了铜（Cu）、锌（Zn）、铅（Pb）、镉（Cd）4种重金属对泥蚶滤水率、性比和性腺发育的慢性毒性效应。铜、铅和镉对FRs有显著的抑制作用，其抑制率随金属浓度的增加和暴露时间的延长而降低。暴露28天后，FR的EC 50值分别为12.9，12.7和14.4 μ g/L的铜，铅和镉。锌暴露对FR没有影响。性别比显着改变，从控制有利于男性的比例增加，在金属浓度的千分之一日元14.2，千分之一日元86和千分之一日元110 μ g/L的铜，铅和镉，分别在千分之一日元1.68 mg/L的锌。文蛤的性腺-体细胞指数显着降低，在所有的金属暴露，除了最低浓度的铜（7.1微克/升）。
The chronic toxic effects of major heavy metals including copper (Cu), zinc (Zn), lead (Pb), and cadmium (Cd) on the filtration rate (FR), sex ratio, and gonad development of immature blood clams, Tegillarca granosa, were investigated. The FRs were significantly inhibited by Cu, Pb and Cd, with rates generally decreasing with both increasing metal concentrations and exposure time. EC50 values for FR after 28 days of exposure were 12.9, 12.7 and 14.4 mu g/L for Cu, Pb and Cd, respectively. Zn exposure had no effect on FR. Sex ratios were significantly altered from controls in favor of an increased proportion of males at metal concentrations of a parts per thousand yen14.2, a parts per thousand yen86 and a parts per thousand yen110 mu g/L for Cu, Pb and Cd, respectively; and at a parts per thousand yen1.68 mg/L for Zn. The gonado-somatic index was significantly reduced in clams at all metal exposures, except for the lowest concentration of Cu (7.1 mu g/L).