Marine Ecology Research Centre, School of Environment, Science and Engineering, Southern Cross University, PO Box 157, Lismore, NSW 2480, Australia; National Marine Science Centre, Southern Cross University, PO Box 4321, Coffs Harbour, NSW 2450, Australia; CAPES Foundation, Ministry of Education of Brazil, Brasilia, DF 70040-020, Brazil.
Marine Ecology Research Centre, School of Environment, Science and Engineering, Southern Cross University, PO Box 157, Lismore, NSW 2480, Australia.
Mar Environ Res. 2018 Mar;134:1-15. doi: 10.1016/j.marenvres.2017.12.018. Epub 2017 Dec 20.
Mercury is a known toxic metal, but studies on the effects of inorganic mercury ingestion in aquatic organisms are scarce. The present study aimed to investigate changes in feeding behaviour and biomarkers (lipid peroxidation, acetylcholinesterase, glutathione S-transferase and catalase activities) of yellowfin bream (Acanthopagrus australis) after ingestion of inorganic mercury (control: 0.2 mg kg, low: 0.7 mg kg, medium: 2.4 mg kg and high: 6 mg kg) over 16 days. After 4 days, exposed fish attempted feeding more often, and showed a significantly lower eating success than controls. However, these differences became less notable with longer exposure periods. Most biochemical markers varied over time, regardless of mercury treatment. However, biomarker responses to mercury were also observed, mostly with increased exposure period and were dependant on the tissue analysed. This study showed that fish can recover from initial feeding behaviour effects of inorganic mercury, but showed delayed response in tissue biomarkers.
汞是一种已知的有毒金属，但关于水生生物摄入无机汞的影响的研究还很缺乏。本研究旨在调查摄入无机汞（对照组：0.2mg/kg，低剂量组：0.7mg/kg，中剂量组：2.4mg/kg，高剂量组：6mg/kg）16 天后，黄鳍鲷（Acanthopagrus australis）摄食行为和生物标志物（脂质过氧化、乙酰胆碱酯酶、谷胱甘肽 S-转移酶和过氧化氢酶活性）的变化。第 4 天，暴露组的鱼尝试摄食的次数更多，摄食成功率明显低于对照组。然而，随着暴露时间的延长，这些差异变得不那么明显。大多数生化标志物随时间变化，而与汞处理无关。然而，也观察到了对汞的生物标志物反应，这些反应主要随着暴露时间的延长而出现，并且依赖于所分析的组织。本研究表明，鱼类可以从无机汞最初的摄食行为影响中恢复，但在组织生物标志物方面表现出延迟反应。
