Abstract：
BACKGROUND: Garfish, (Belone belone) is a migratory pelagic fish that inhabits the waters of coastal Europe, North Africa, the North Sea, the Mediterranean Sea. Little information about garfish has been disseminated mainly because of its low abundance and its brief occurrence in various water bodies. Data is lacking on mercury compounds, particularly dangerous the toxic organic form of methylmercury (MeHg), which endangers the health of fish and their consumers.
METHODS: The research material was garfish caught off the southern Baltic Sea coast in Puck Bay during the spawning period. Total mercury (THg) content was assayed with the cold vapour atomic absorption method in an AMA 254 mercury analyser. The MeHg extraction procedure was based on three-step sequential extraction method: hydrolysis using of hydrochloric acid, extract by toluene, bind the MeHg by L-cysteine.
RESULTS: The concentrations of THg and MeHg was determined in the muscle of garfish. The highest concentrations of THg (0.210 mg kg-1) and MeHg (0154 mg kg-1) were detected in the longest specimens (80 cm). The THg and MeHg concentrations in garfish muscles increased with specimens length, weight and age, which was confirmed by positive correlations. Differences were also noted depending on sex. Males accumulated more THg and MeHg than did females. The mercury in garfish from the southern Baltic Sea occurred mainly in its organic form MeHg and accounted for 84.7% of the THg.
CONCLUSIONS: Significant differences were noted in mercury concentrations depends on length, weight, age and sex. Concentration of MeHg in garfish must be done by length class, and fish sex when selecting this fish for contamination studies and risk assessment. The toxic MeHg in garfish tissues did not pose a threat to the health of consumers, as indicated by the low values of EDI, TWI and THQ indices.
METHODS: The research material was garfish caught off the southern Baltic Sea coast in Puck Bay during the spawning period. Total mercury (THg) content was assayed with the cold vapour atomic absorption method in an AMA 254 mercury analyser. The MeHg extraction procedure was based on three-step sequential extraction method: hydrolysis using of hydrochloric acid, extract by toluene, bind the MeHg by L-cysteine.
RESULTS: The concentrations of THg and MeHg was determined in the muscle of garfish. The highest concentrations of THg (0.210 mg kg-1) and MeHg (0154 mg kg-1) were detected in the longest specimens (80 cm). The THg and MeHg concentrations in garfish muscles increased with specimens length, weight and age, which was confirmed by positive correlations. Differences were also noted depending on sex. Males accumulated more THg and MeHg than did females. The mercury in garfish from the southern Baltic Sea occurred mainly in its organic form MeHg and accounted for 84.7% of the THg.
CONCLUSIONS: Significant differences were noted in mercury concentrations depends on length, weight, age and sex. Concentration of MeHg in garfish must be done by length class, and fish sex when selecting this fish for contamination studies and risk assessment. The toxic MeHg in garfish tissues did not pose a threat to the health of consumers, as indicated by the low values of EDI, TWI and THQ indices.
摘要：
背景：Garfish，（Belonebelone）是一种迁徙的中上层鱼类，栖息在欧洲沿海水域，北非,北海,地中海。有关吊鱼的信息很少，主要是因为其丰度低并且在各种水体中短暂出现。缺乏有关汞化合物的数据，甲基汞（MeHg）的有毒有机形式尤其危险，危害鱼类及其消费者的健康。
方法：研究材料是产卵期在Puck湾的波罗的海南部海岸捕获的石斑鱼。在AMA254汞分析仪中使用冷蒸气原子吸收法测定总汞（THg）含量。MeHg提取程序基于三步顺序提取法：使用盐酸水解，用甲苯萃取，通过L-半胱氨酸结合MeHg。
结果：测定了石斑鱼肌肉中THg和MeHg的浓度。在最长的标本（80cm）中检测到最高浓度的THg（0.210mgkg-1）和MeHg（0154mgkg-1）。石斑鱼肌肉中THg和MeHg浓度随标本长度而增加，体重和年龄,正相关证实了这一点。差异也取决于性别。雄性比雌性积累更多的THg和MeHg。来自波罗的海南部的石斑鱼中的汞主要以有机形式存在，占THg的84.7％。
结论：观察到汞浓度的显著差异取决于长度，体重,年龄和性别石斑鱼中的甲基汞浓度必须按长度等级计算，和鱼类性别选择这种鱼进行污染研究和风险评估。石斑鱼组织中的有毒甲基汞不会对消费者的健康构成威胁,如EDI的低值所示，TWI和THQ指数。
方法：研究材料是产卵期在Puck湾的波罗的海南部海岸捕获的石斑鱼。在AMA254汞分析仪中使用冷蒸气原子吸收法测定总汞（THg）含量。MeHg提取程序基于三步顺序提取法：使用盐酸水解，用甲苯萃取，通过L-半胱氨酸结合MeHg。
结果：测定了石斑鱼肌肉中THg和MeHg的浓度。在最长的标本（80cm）中检测到最高浓度的THg（0.210mgkg-1）和MeHg（0154mgkg-1）。石斑鱼肌肉中THg和MeHg浓度随标本长度而增加，体重和年龄,正相关证实了这一点。差异也取决于性别。雄性比雌性积累更多的THg和MeHg。来自波罗的海南部的石斑鱼中的汞主要以有机形式存在，占THg的84.7％。
结论：观察到汞浓度的显著差异取决于长度，体重,年龄和性别石斑鱼中的甲基汞浓度必须按长度等级计算，和鱼类性别选择这种鱼进行污染研究和风险评估。石斑鱼组织中的有毒甲基汞不会对消费者的健康构成威胁,如EDI的低值所示，TWI和THQ指数。
