Bekhit Alaa El-Din A, Morton James D, Dawson Chris O
Agriculture and Life Sciences Division, Lincoln University, P.O. Box 84, Canterbury, New Zealand.
J Agric Food Chem. 2008 Jun 25;56(12):4846-53. doi: 10.1021/jf8005646. Epub 2008 May 22.
The concentrations of trace elements in fish roes and the effect of processing conditions (karasumi-like or karashi mentaiko) were investigated in six commercial fish species from New Zealand. The studied elements were As, Cd, Cr, Cu, Hg, Pb, and Zn, and the roes were from the following species: chinook salmon ( Oncorhynchus tshawytscha), hoki ( Macruronus novaezelandiae), southern blue whiting ( Micromesistius australis), hake ( Merluccius australis), blue warehou ( Seriolella brama), and barracouta ( Thyrsites atun). The concentrations of As, Cd, Cr, Hg, and Pb in the roes were lower than literature values for fish muscles. Only Zn in barracouta roe and Cu in salmon roe and their products were relatively higher than the generally accepted levels in fish muscles and could be of safety concern. Hence, the consumption of barracouta and salmon roes among certain parts of the population needs to be monitored and assessed. Dry salting (karasumi-like) processing increased ( P < 0.001) the concentrations of the studied trace elements while salting fermentation (karashi mentaiko) processing tended to decrease the levels of trace elements. Fermentation may be a useful process to decrease the level of toxic trace elements.
对来自新西兰的六种商业鱼类的鱼籽中微量元素的浓度以及加工条件（如盐渍明太子或辣明太子）的影响进行了研究。所研究的元素为砷（As）、镉（Cd）、铬（Cr）、铜（Cu）、汞（Hg）、铅（Pb）和锌（Zn），鱼籽来自以下物种：奇努克鲑（Oncorhynchus tshawytscha）、无须鳕（Macruronus novaezelandiae）、南蓝鳕（Micromesistius australis）、无须鳕（Merluccius australis）、蓝拟鲈（Seriolella brama）和竹荚鱼（Thyrsites atun）。鱼籽中砷、镉、铬、汞和铅的浓度低于鱼类肌肉的文献值。仅竹荚鱼鱼籽中的锌以及鲑鱼鱼籽及其制品中的铜相对高于鱼类肌肉中普遍认可的水平，可能存在安全问题。因此，需要对特定人群中竹荚鱼和鲑鱼鱼籽的消费进行监测和评估。干盐渍（如盐渍明太子）加工会增加（P < 0.001）所研究微量元素的浓度，而盐渍发酵（辣明太子）加工则倾向于降低微量元素的水平。发酵可能是降低有毒微量元素水平的一种有效方法。
