ABSTRACT

In response to variation in abiotic factors and metal accumulation pattern in fish, current research tries to draw a chronological relationship between the annual profiles of oxidative stress markers. Rhinomugil corsula were collected twice a month over the course of an annual cycle from two separate locations. Fluctuations in concentrations of certain metals (lead, zinc, copper and cadmium) in water and gill tissues were estimated accordingly. Current study also measured the rhythmic expression of antioxidants (enzymatic and non-enzymatic) and Na⁺-K⁺ATPase in gill tissues. Therefore, present study explored rhythmic responses of oxidative stress marker to assess the impact of different metals on selected fish species. Here, we tried to develop a conceptual idea to analyse and predict the consequences of metal pollution on the possible shift in rhythmicity of aforesaid antioxidants in fish gill. Our results indicate that the amplitude of circannual rhythms of all the selected stress markers varied accordingly with an increase in metal accumulation throughout an annual cycle. A shift in the pattern of annual rhythmicity of antioxidant markers is noted, associated with the fluctuation in the accumulation of zinc and copper. Therefore, current information would help to frame responses of fish gill in metal infected aquatic system.

摘要

为了应对鱼类中非生物因子和金属积累模式的变化，当前的研究试图在氧化应激标志物的年度分布之间绘制年代关系。在一年周期的过程中，每月从两个不同的位置收集两次犀牛硬毛。据此估算了水和g组织中某些金属（铅，锌，铜和镉）的浓度的波动。目前的研究还测量了抗氧化剂（酶和非酶）和Na ⁺ -K ⁺的节律性表达g组织中的ATPase。因此，本研究探索了氧化应激标记的节律性反应，以评估不同金属对选定鱼类的影响。在这里，我们试图提出一个概念性的想法，以分析和预测金属污染对鱼g中上述抗氧化剂的节律性可能发生的影响。我们的结果表明，所有选定应力标记的昼夜节律幅度随整个年周期中金属积累的增加而相应变化。注意到抗氧化剂标记物的年度节律模式的变化，这与锌和铜积累的波动有关。因此，当前信息将有助于确定金属感染的水生系统中鱼g的反应。