Pecoraro Giulliana D, Hortellani Marcos A, Hagiwara Yuri S, Braga Elisabete S, Sarkis Jorge E, Azevedo Juliana S
Institute of Environmental, Chemical and Pharmaceutical Sciences, Federal University of São Paulo, Diadema, Brazil.
Institute of Energy and Nuclear Research, São Paulo, Brazil.
Bull Environ Contam Toxicol. 2019 Feb;102(2):175-179. doi: 10.1007/s00128-018-2485-3. Epub 2018 Nov 1.
In order to improve the knowledge of total mercury (THg) bioaccumulation in bioindicator species of sea catfish (Siluriformes, Ariidae) and taking into account the relatively recent approach with respect to estuarine fish on the Brazilian coast, 65 individuals were caught in the northern and southern regions of the Cananeia estuary to determine the concentration of the THg in muscles, gills, gonads and kidney of the Cathorops spixii and Genidens genidens specimens. The difference in the THg accumulation associated to the maturity of the catfish reflects a differential metabolism regarding THg bioaccumulation in adults (males and females) and juveniles. These observations reinforce the importance of considering the maturity of the individual in order to understand the bioaccumulation and metabolism of fish under different environmental stress and conditions. Furthermore, abiotic conditions such as salinity should be evaluated in association with metabolic/biological conditions of the fish's bioindicators, especially in environments with large natural or anthropogenic transition gradients.
为了增进对海鲶（鲇形目，海鲶科）生物指示物种中总汞（THg）生物累积的了解，并考虑到巴西海岸河口鱼类相对较新的研究方法，在卡纳内阿河口的北部和南部地区捕获了65只个体，以测定斯氏海鲶和格氏海鲶标本的肌肉、鳃、性腺和肾脏中的THg浓度。鲶鱼成熟度与THg累积的差异反映了成年（雄性和雌性）和幼年鲶鱼在THg生物累积方面的代谢差异。这些观察结果强化了考虑个体成熟度对于理解不同环境压力和条件下鱼类生物累积和代谢的重要性。此外，诸如盐度等非生物条件应与鱼类生物指示物的代谢/生物学条件相关联进行评估，尤其是在具有较大自然或人为过渡梯度的环境中。
