水体铅暴露下草鱼幼鱼游泳行为和代谢响应

生态学杂志

水体铅暴露下草鱼幼鱼游泳行为和代谢响应

徐勐¹,袁喜^1,2,靖锦杰¹,黄应平^1,2*,涂志英²,胥焘²

(¹三峡大学水利与环境学院，湖北宜昌 443002； ²三峡大学三峡库区生态环境教育部工程研究中心，湖北宜昌 443002)

出版日期:2018-05-10 发布日期:2018-05-10

Swimming behavior and metabolism responses of juvenile grass carp under the exposure of water-borne lead (Pb²⁺).

XU Meng¹, YUAN Xi^1,2, JING Jin-jie¹, HUANG Ying-ping¹,^2*, TU Zhi-ying², XU Tao²

(¹College of Hydraulic & Environment Engineering, China Three Gorges University, Yichang, 443002, Hubei, China; ²Engineering Research Center of Eco-environment in Three Gorges Reservoir Region, Ministry of Education, China Three Gorges University, Yichang, 443002, Hubei, China).

Online:2018-05-10 Published:2018-05-10

摘要/Abstract

摘要： 为探讨重金属铅(Pb)污染对鱼游泳能力和代谢的影响，在实验室条件下，分析了20 ℃时4组Pb²⁺浓度(0、0.75、2.24和3.73 mg·L^-1)暴露对草鱼(Ctenopharyngodon idella)幼鱼临界游泳速度(U_crit)和运动耗氧率(MO₂)的影响。结果表明：与对照组比较，Pb²⁺浓度为3.73 mg·L^-1时草鱼幼鱼U_crit显著下降(P<0.05)，U_crit为对照组的91.22%；草鱼幼鱼游泳速度与耗氧率均线性相关；随着Pb²⁺浓度增加，草鱼幼鱼最大和最小耗氧率差值先增加后降低，Pb²⁺浓度为3.73 mg·L^-1时这一差值下降了17.68%；低浓度Pb²⁺暴露引起运动过程中耗氧利用效率降低，可能是导致草鱼幼鱼游泳能力下降的主要原因；通过草鱼耗氧和行为对急性Pb²⁺暴露的响应研究，为河流Pb²⁺生态风险评价及控制提供参考。

关键词: 水溶性颗粒物, 粒径分布, 大气颗粒物, 非水溶性颗粒物

Abstract: To investigate the effects of water-borne lead (Pb) on the swimming capability and metabolism of jevenile grass carp (Ctenopharyngodon idella), critical swimming speed (U_crit) and oxygen consumption rate (MO₂) were measured in water with four concentrations of Pb²⁺ (0, 0.75, 2.24, 3.73 mg·L^-1) at 20 ℃. The results showed that after exposure to 3.73 mg·L^-1 Pb²⁺, U_crit significantly decreased (P<0.05), being 91.22% of that of the control group. The swimming speed was linearly correlated withMO₂. With the increase of Pb²⁺ concentration, the difference of the maximum and minimum oxygen consumption rate increased first and then decreased. It was decreased by 17.68% after exposure to 3.73 mg·L^-1 Pb²⁺ compared to the control group. Exposure to low concentration of Pb²⁺ decreased the oxygen consumption efficiency, which might be the main reason for the decrease of the swimming capability of grass carp. Ourresults could be used to assess and control water Pb²⁺ risk in river and thus provide reference for environmental management.

Key words: particulate matter, water-insoluable particles, water-soluble particles, diameter distribution.

徐勐,袁喜,靖锦杰,黄应平,涂志英,胥焘. 水体铅暴露下草鱼幼鱼游泳行为和代谢响应[J]. 生态学杂志.

XU Meng, YUAN Xi, JING Jin-jie, HUANG Ying-ping, TU Zhi-ying, XU Tao. Swimming behavior and metabolism responses of juvenile grass carp under the exposure of water-borne lead (Pb²⁺).[J]. cje.

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