挪威渔业技术研究所的专家研制成一种能将青鱼进行雌雄分类的仪器。该仪器的主要结构为电子器件部分和分类机械部分。使用时,只要用仪器向鱼体照射不同光谱的X线,根据其透射变差值就可分辨出青鱼的雌雄,并将它们分类。由于雌性青鱼要比雌雄混合青鱼的售价高得多,所以这 The Norwegian Institute of Fisheries Technology developed a device that classifies herds as male and female. The main structure of the instrument for the electronic part and the classification of mechanical parts. Use, as long as the instrument to the fish irradiated with different spectral X-ray, according to its transmission variability can distinguish the male and female herds, and they are classified. This is because the price of female herring is much higher than that of male and female mixed herring