Faculty of Agricultural Sciences, Federal University of Vales Do Jequitinhonha and Mucuri, Highway MGT 367 - Km 583, nº 5000 - Alto da Jacuba, Diamantina, MG, 39100-000, Brazil.
Laboratory of Aquaculture and Aquatic Ecology, Department of Animal Science, Federal University of Valleys of the Jequitinhonha and Mucuri, Highway MGT 367 - Km 583, nº 5000 - Alto da Jacuba, Diamantina, MG, 39100-000, Brazil.
Environ Sci Pollut Res Int. 2022 Mar;29(15):21803-21810. doi: 10.1007/s11356-021-17205-y. Epub 2021 Nov 12.
The aim of this study was to determine the 96-h LC (lethal concentration for 50% of the test population in 96 h of observation) of mercury chloride (HgCl) and evaluated its absorption in the gills, liver, and muscle of juvenile "curimatã-pacu," Prochilodus argenteus. The fish were exposed for 4 days to different concentrations of HgCl: 0.000, 0.0375, 00.075, 0.150, 0.225, 0.300, and 0.400 mg L to get the 96-h LC, and the concentration of Hg in the tissues. The fish were exposed to different levels of HgCl2 (0.000, 0.0375, 00.075, 0.150, 0.225, and 0.300 mg L), for 4 and 7 days, when different tissues (gills, liver, and muscle) were sampled. The mercury concentration values obtained were compared between tissues, days, and concentration of mercury in the water. The 96-h LC for P. argenteus was 0.339 mg L of HgCl, within the range found for other neotropical and tropical species, showing a medium sensitivity. The concentration of Hg in the tissues increased from the muscle to the gills and liver, and according to the increasing concentration of HgCl in the water. The fish liver is the most suitable tissue for environmental monitoring and for the evaluation of the consumed fished. Despite being the tissue that least accumulated mercury, the muscle must be evaluated because it is the part consumed by the population.
本研究旨在确定氯化汞（HgCl）的 96 小时 LC（在 96 小时观察期内导致 50%试验种群死亡的浓度），并评估其在幼鱼“curimatã-pacu”（Prochilodus argenteus）的鳃、肝和肌肉中的吸收情况。鱼在不同浓度的 HgCl 下暴露了 4 天：0.000、0.0375、00.075、0.150、0.225、0.300 和 0.400 mg L，以获得 96 小时 LC，并检测组织中的 Hg 浓度。鱼在不同浓度的 HgCl2（0.000、0.0375、00.075、0.150、0.225 和 0.300 mg L）下暴露 4 天和 7 天，然后采样不同组织（鳃、肝和肌肉）。比较了不同组织、天数和水中汞浓度下获得的汞浓度值。P. argenteus 的 96 小时 LC 为 0.339 mg L 的 HgCl，在其他新热带和热带物种的范围内，表明其敏感性中等。组织中的 Hg 浓度从肌肉到鳃和肝增加，并且随着水中 HgCl 浓度的增加而增加。鱼肝是环境监测和评估食用鱼最适合的组织。尽管肌肉是积累汞最少的组织，但仍必须对其进行评估，因为它是被人群消耗的部分。
