We examined the temporal variation of heavy metals in different sexes of three brackish water shrimp species with emphasis on the relationship between Fulton's K condition indices and metal pollution index (MPI). Zn was the most abundant metal followed by Sn, though levels were below the admissible limits (irrespective of gender). Temporal variation of Zn and Pb was significant (p < 0.01). Drier weather conditions influenced Pb accumulation. Temporal variation of Sn was insignificant (p > 0.05), but temporal variation of Hg was significant only in Penaeus monodon (p < 0.0001). However, the relationship between temporal variation of the above-mentioned metals and gender was insignificant except in Penaeus semisulcatus for Pb (p < 0.02) and Sn (p < 0.04) despite no consistent higher bioaccumulation pattern by one particular sex. There were no significant negative correlations between the Fulton's K condition indices and MPI values in the different sexes. MPI values between the two sexes were insignificant. Any differences in the MPI values between the three species were insignificant. Only Penaeus semisulcatus exhibited significant differences (p < 0.022) in Fulton's K condition indices in relation to gender. Fulton's K condition indices are unreliable indicators of metal-induced stress levels in shrimps.

我们研究了三种咸淡水虾物种不同性别中重金属的时间变化，重点研究了富尔顿钾素状况指数与金属污染指数（MPI）之间的关系。锌是最丰富的金属，其次是锡，尽管其含量低于容许极限（与性别无关）。锌和铅的时间变化显着（p <0.01）。较干燥的天气条件影响了铅的积累。Sn的时间变化不明显（p > 0.05），但Hg的时间变化仅在斑节对虾中显着（p <0.0001）。然而，上述金属的时间变化与性别之间的关系微不足道，除了对半边对虾Pb（p <0.02）和Sn（p <0.04）时，尽管某一性别没有一致的较高生物蓄积模式。不同性别的富尔顿氏K指数与MPI值之间无显着负相关。男女之间的MPI值无关紧要。三个物种之间的MPI值的任何差异均不明显。只有半对虾对性别的富尔顿K状况指数显示出显着差异（p <0.022）。富尔顿的K条件指数是金属诱导的虾应力水平的不可靠指标。