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Mercury levels of small fishes: influence of size and catch area

机译：小鱼的汞含量：大小和捕捞面积的影响

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摘要

In the present study, we assessed small fishes as potential feed fishes with the lowest mercury levels. The mercury levels of four small pelagic fishes and a benthic fish from the Pacific Ocean and the Sea of Japan, i.e., spotted chub mackerel Scomber australasicus, chub mackerel Scomber japonicus, horse mackerel Trachurus trachurus, round scad Decapterus punctatus, and bastard halibut Paralichthys olivaceus, were determined. Total mercury levels in fish muscle were measured using a reduction vaporizing atomic absorption method. There were no significant correlations between body weight and mercury levels for these species. However, significant differences were observed in the mercury levels of these species between the two catch locations, with fish caught in the Pacific Ocean having higher mercury levels. This difference may be due to the Pacific Ring of Fire, a highly seismically and volcanically active zone, which is located in the Pacific Ocean. Preference for these fishes for use in aquaculture should refer to the area where they are caught in addition to the species.
机译：在本研究中，我们将小型鱼评估为汞含量最低的潜在饲料鱼。来自太平洋和日本海的四种中上小鱼类和底栖鱼类的汞水平，即斑鲭鱼Scomber australasicus，鲭鱼Scomber japonicus，竹荚鱼Trachurus trachurus，圆鳞Dec鱼和杂种大比目鱼，已确定。鱼肉中的总汞含量采用还原汽化原子吸收法测量。这些物种的体重和汞含量之间没有显着相关性。但是，在两个捕捞地点之间观察到这些物种的汞含量存在显着差异，在太平洋捕捞的鱼类的汞含量更高。造成这种差异的原因可能是太平洋火环，这是一个位于太平洋的高度地震和火山活动区。这些鱼类在水产养殖中的使用首选应指除该物种以外的其他捕捞区域。

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