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陈剑明, 徐永健, 卢光明, 宁燕, 潘霞. 铜和镉胁迫对海洋青鳉摄食行为的影响[J]. 水生生物学报, 2020, 44(3): 554-561. DOI: 10.7541/2020.068
引用本文: 陈剑明, 徐永健, 卢光明, 宁燕, 潘霞. 铜和镉胁迫对海洋青鳉摄食行为的影响[J]. 水生生物学报, 2020, 44(3): 554-561. DOI: 10.7541/2020.068
CHEN Jian-Ming, XU Yong-Jian, LU Guang-Ming, NING Yan, PAN Xia. EFFECTS OF Cu2+ AND Cd2+ ON THE FEEDING BEHAVIOR OF ORYZIAS MELASTIGMA[J]. ACTA HYDROBIOLOGICA SINICA, 2020, 44(3): 554-561. DOI: 10.7541/2020.068
Citation: CHEN Jian-Ming, XU Yong-Jian, LU Guang-Ming, NING Yan, PAN Xia. EFFECTS OF Cu2+ AND Cd2+ ON THE FEEDING BEHAVIOR OF ORYZIAS MELASTIGMA[J]. ACTA HYDROBIOLOGICA SINICA, 2020, 44(3): 554-561. DOI: 10.7541/2020.068

铜和镉胁迫对海洋青鳉摄食行为的影响

EFFECTS OF Cu2+ AND Cd2+ ON THE FEEDING BEHAVIOR OF ORYZIAS MELASTIGMA

  • 摘要: 以海洋青鳉(Oryzias melastigma)为试验动物, 分析了铜和镉两种重金属离子胁迫对海洋青鳉摄食行为特征的影响, 包括摄食响应时间、摄食量、摄食成功率和摄食效率等参数。结果显示, 随着Cu2+浓度的升高, 开始时, 海洋青鳉的摄食量有所升高, 当Cu2+浓度达到0.087 mg/L时有最大的摄食量和最短的摄食响应时间。随后, 摄食量出现下降, 在0.174 mg/L时达到最低。低浓度的Cu2+还能提高海洋青鳉的摄食成功率和摄食效率, 而Cu2+的高浓度和长时间暴露则降低海洋青鳉的摄食成功率和摄食效率。Cd2+对海洋青鳉的摄食行为具有明显的抑制效应, Cd2+抑制海洋青鳉摄食的最低可见效应浓度为 0.65 mg/L, 摄食量、摄食成功率和摄食效率均随着Cd2+浓度的升高而降低。此外, 在Cu2+和Cd2+胁迫下, 对食物的响应时间有性别差异, 雌性显著短于雄性, 还存在群体显著短于个体等现象。

     

    Abstract: In this study, we used Oryzias melastigma as the experimental animal and used Cuprum and cadmium as the test drugs. The effects on the feeding behavior of Oryzias melastigma exposed to Cu2+ and Cd2+ were analyzed, including the response time of feeding behavior, food intake, the success rate of feeding and feeding efficiency. The results showed that with an increase in the Cuprum concentration, the food intake initially increased to the maximum food intake, associated with the shortest feeding response time, and then decreased at a concentration of 0.174 mg/L. A low concentration of Cu2+ improved the feeding success rate and feeding efficiency of Oryzias melastigma, while a high concentration of Cu2+ and long-term exposure resulted in the opposite effects. Cd2+ had a significant inhibitory effect on the feeding behavior of Oryzias melastigma, and the lowest observed effect concentration of Cd2+ that inhibited the feeding of Oryzias melastigma was 0.65 mg/L. Moreover, the food intake, feeding success rate and feeding efficiency decreased with an increasing Cd2+ concentration. The response time to food was significantly shorter for females than for males, and that of the group was significantly shorter than those of individuals.

     

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