State Key Laboratory for Marine Environmental Science, College of Environment and Ecology, Xiamen University, Xiamen 361005, China.
Ecotoxicol Environ Saf. 2013 May;91:10-7. doi: 10.1016/j.ecoenv.2013.01.002. Epub 2013 Feb 9.
To investigate the potential influence of the contamination of copper (Cu) or zinc (Zn), the abalone Haliotis discus hannai was exposed to waterborne or macroalgae-borne Cu or Zn over a period of 8weeks. Both Cu and Zn were effectively accumulated by the abalones from water or macroalgae, but their concentration factors and trophic transfer factors were low due to the regulation of Cu and Zn accumulation. Following waterborne or dietary exposure, the abalones exhibited different accumulation patterns of Cu and Zn. The tissue Zn burden decreased quickly after the initial accumulation, and the incoming Zn was mainly deposited in the viscera. In contrast, the tissue Cu burden increased rapidly and gradually reached a steady state. The abalone muscle exhibited a comparable storage capacity of Cu as the viscera and the accumulated Cu in muscle was mainly derived from the dissolved phase instead of trophic transfer. The feeding and growth of the abalone were not influenced in all the exposure regimes. Moreover, the significant induction of metallothionein indicated that the bioaccumulated metals were actively detoxified. In the metal-exposed abalones, more Cu was distributed into the biologically detoxified fractions (metallothionein-like protein and/or metal-rich granule), whereas no significant subcellular redistribution of Zn was observed. Our study suggested that the abalone may have high endurance to the contamination of Cuor Zn.
为了研究铜（Cu）或锌（Zn）污染的潜在影响，将鲍鱼 Haliotis discus hannai 暴露于水相或大型藻类携带的 Cu 或 Zn 中，持续 8 周。Cu 和 Zn 都能被鲍鱼有效地从水中或大型藻类中积累，但由于 Cu 和 Zn 积累的调节，其浓度因子和营养转移因子较低。在水相或饮食暴露后，鲍鱼表现出不同的 Cu 和 Zn 积累模式。组织 Zn 负荷在初始积累后迅速下降，进入的 Zn 主要沉积在内脏。相比之下，组织 Cu 负荷迅速增加，并逐渐达到稳定状态。鲍鱼肌肉对 Cu 的储存能力与内脏相当，肌肉中积累的 Cu 主要来自溶解相而不是营养转移。在所有暴露组中，鲍鱼的摄食和生长均未受到影响。此外，金属硫蛋白的显著诱导表明生物积累的金属被主动解毒。在暴露于金属的鲍鱼中，更多的 Cu 分布在生物解毒的部分（类金属硫蛋白和/或富含金属的颗粒），而 Zn 没有明显的亚细胞重新分布。我们的研究表明，鲍鱼可能对 Cu 或 Zn 的污染有很高的耐受能力。
