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Abstract：
Specimens of the Cichla pinima are of ecological and economic importance in the Amazon region and are a good bioindicator species of Hg bioaccumulation. Adult specimens of Cichla pinima were obtained by fisheries in the Tapajós river region\'s impacted gold mining area. Tissues such as muscle, liver, skin, and gill were submitted for total mercury (THg) analysis. For hepatic bioavailability, assays were carried out in the whole liver and in the sub-cellular hepatic fraction. The weight-length relationship showed an equation of W = 2E - 06L3.3002 (R2 = 0.856) indicating an allometric growth. The mean THg values found in the muscle tissue of 676 ± 258 μg kg-1 were below the maximum limit established for human consumption, but were similar to Cichla fish from other areas impacted by Hg in the Amazon region. The trends of levels in the tissues were as follows: liver>muscle>gonads>skin>gill, with no significant differences between the gills and skin. A significant and positive correlation as rs = 0.65 was obtained between the THg contents in cytosolic fraction and the total hepatic THg (liver homogenate). However, only 7% of the THg were found and were available to the sub-cellular hepatic fraction. This profile can be an indicative of a hepatic cellular transference in fish exposed to high Hg levels in the Amazon region now that low concentrations of Hg have been found in the sub-cellular fraction. However, data of differential THg partition in the subcellular compartments should be considered, since others\' hepatic fractions can act in the Hg linkage into the cell.
摘要：
Cichlapinima的标本在亚马逊地区具有生态和经济重要性，是汞生物积累的良好生物指示物种。Cichlapinima的成年标本是通过塔帕霍斯河地区受影响的金矿开采区的渔业获得的。肌肉等组织,肝脏,皮肤,和g被提交进行总汞(THg)分析。对于肝脏生物利用度，在整个肝脏和亚细胞肝级分中进行测定。体重-长度关系显示出W=2E-06L3.3002（R2=0.856）的方程式，表明异速生长。在676±258μgkg-1的肌肉组织中发现的平均THg值低于为人类消耗建立的最大限值，但与亚马逊地区受汞影响的其他地区的Cichla鱼相似。组织中的水平趋势如下：肝脏>肌肉>性腺>皮肤>g，与没有显着差异之间的ill和皮肤。在细胞溶质部分中的THg含量与总肝THg（肝匀浆）之间获得了显着正相关，rs=0.65。然而,只有7%的THg被发现并可用于亚细胞肝级分。由于在亚细胞部分中发现了低浓度的汞，因此该特征可能表明在亚马逊地区暴露于高汞水平的鱼中肝细胞转移。然而,应考虑亚细胞区室中不同THg分区的数据，因为其他肝脏部分可以在汞连接中进入细胞。
