Trial for quality control in mercury contents by using tail muscle of full-cycle cultured bluefin tuna (Thunnus orientalis).
Trial for quality control in mercury contents by using tail muscle of full-cycle cultured bluefin tuna (Thunnus orientalis).
复制标题
全周期养殖蓝鳍金枪鱼尾肌汞含量质量控制试验。
DOI：
10.4315/0362-028x-71.3.595
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发表时间：
2008
影响因子：
2
通讯作者：
K. Kawasaki
中科院分区：
文献类型：
--
作者：
M. Ando;M. Seoka;Masahiro Nakatani;T. Tsujisawa;Yuka Katayama;M. Nakao;Y. Tsukamasa;K. Kawasaki
金枪鱼肌肉中通常含有大量的汞，某些个体体内的汞含量超过标准安全值的10倍。对个别鱼类的汞含量进行检查是可取的，但可能不具有成本效益。在这项研究中，我们试图建立一个低成本的系统来检查金枪鱼的汞含量，通过使用通常被丢弃的尾部肌肉。本实验中使用的样品是在近畿大学水产实验室（日本和歌山大岛实验站）养殖的蓝鳍金枪鱼。它们是从2002年产卵的鸡蛋中培育出来的。2004年12月至2005年11月期间，挑选了98名体重在22.3至61.6公斤之间的个体。在9个个体中，尾部的汞含量与全身的汞含量进行了比较。样品经酸消解后，用还原蒸发原子吸收法测定总汞含量。除腹部前部汞含量较低（0.490 ppm）外，鱼的其他部位的汞含量与尾肌（0.631 ppm）没有差异。因此，据估计，蓝鳍金枪鱼体内的总体汞浓度与尾部肌肉中的汞浓度几乎相同和/或更低。在这些结果的基础上，我们用一年时间调查了运输的全周期养殖蓝鳍金枪鱼中的汞含量。无论体重增加与否，汞浓度均未增加。
Substantial amounts of mercury are usually present in tuna muscle, with levels in excess of 10 times the standard safety value present in some individuals. Inspection of individual fish for mercury content would be desirable but may not be cost-effective. In this study, we tried to establish a low-cost system for checking the mercury content of tuna by using a tail muscle that is usually discarded. The samples used in this experiment were bluefin tuna, cultured in the Fisheries Laboratory of Kinki University (Oshima Experimental Station, Wakayama, Japan). They were raised from eggs spawned in 2002. Ninety-eight individuals, weighing 22.3 to 61.6 kg, were selected between December 2004 and November 2005. In nine individuals, the mercury content of the tail was compared with that of the whole body. The total mercury level was measured using the reduction vaporizing atomic absorption method after acid digestion. Except for the front of the abdomen, where the mercury content was lower (0.490 ppm), the mercury content of other parts of the fish did not differ from that of the tail muscle (0.631 ppm). Therefore, the overall mercury concentration in bluefin tuna could be estimated to be almost the same and/or lower than that of the tail muscle. On the basis of these results, for 1 year we investigated the quantity of mercury in full-cycle cultured bluefin tuna that were shipped. The mercury concentration showed no increase irrespective of increases of body weight.