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首页> 外文期刊>Environmental toxicology and chemistry >EFFECTS OF SALINITY ON COPPER ACCUMULATION IN THE COMMON KILLIFISH (FUNDULUS HETEROCLITUS)
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EFFECTS OF SALINITY ON COPPER ACCUMULATION IN THE COMMON KILLIFISH (FUNDULUS HETEROCLITUS)

机译：盐度对常见杀害鱼类（杂种真菌）中铜积累的影响

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Results of laboratory and field studies have demonstrated that salinity influences the accumulation of copper. The present study is, to our knowledge, the first to examine the effect of salinity on copper accumulation in a teleost fish across a comprehensive range of salinity from freshwater to seawater. This was done in an effort to identify potential target tissues and differences in chemical interactions across salinities that will aid in the development of a seawater biotic ligand model (BLM) for copper. Killifish (Fundulus heteroclitus) were acclimated to five salinities (0, 5, 11, 22, and 28 ppt) and exposed to three copper concentrations (0 [nominal], 30, and 150 μg L~(-1)), yielding 15 treatment groups. Fish from each group were sampled for tissue copper analysis at 0, 4, 12, and 30 d postexposure. Whole-body and liver accumulations were highest at lower salinities. The liver accounted for 57 to 86% of the whole-body copper even though it accounted for less than 4% of the body mass. Similarly, the gill accumulated more copper at lower salinities, whereas the intestine generally accumulated more copper at higher salinities. Speciation calculations indicate that CuCO, likely accounts for much of the accumulation, possibly with some contributions from CuOH~+ and Cu(OH)_2. The free ion, Cu~(2+), does not appear to be associated with copper accumulation. However, the differences in physiology and in the concentrations of competing cations across salinities suggest that speciation alone cannot explain accumulation. The present findings may have implications for future development of a BLM for saline environments by identifying potential target tissues.
机译：实验室和现场研究的结果表明，盐度会影响铜的积累。据我们所知，本研究是第一个研究盐度对从淡水到海水的各种盐度范围内的硬骨鱼中铜积累的影响的方法。这样做是为了确定潜在的目标组织以及盐度之间化学相互作用的差异，这将有助于开发铜的海水生物配体模型（BLM）。使illi鱼（Fundulus heteroclitus）适应五种盐度（0、5、11、22和28 ppt），并暴露于三种铜浓度（0 [标称]，30和150μgL〜（-1）），得到15治疗组。在暴露后0、4、12和30 d对每组的鱼进行组织铜分析。盐度较低时，全身和肝脏的积累最高。肝脏占全身铜的57％至86％，尽管它占体重的不足4％。同样，g在较低盐度下积累了更多的铜，而肠在较高盐度下通常积累了更多的铜。形态计算表明，CuCO可能占了大部分积累量，可能是由CuOH〜+和Cu（OH）_2引起的。游离离子Cu〜（2+）似乎与铜的积累无关。但是，盐度之间生理学和竞争性阳离子浓度的差异表明，单独的物种形态不能解释积累。通过鉴定潜在的目标组织，本发现可能对盐环境中BLM的未来发展有影响。

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