In europe , mainly capelin , sandeel , mackerel and norway pout are used for fish meal production .

在欧洲，主要用毛鳞鱼，沙丁鱼，鲭与挪威鳕来生产鱼粉。

Big fish such as cod , tuna , and groupers have declined worldwide by two-thirds while the number of anchovies , sardines and capelin has surged in their absence , said university of british columbia researchers .

哥伦比亚大学的研究者说，世界范围内大型鱼类像鳕鱼、金枪鱼、石斑鱼的数量减少了三分之二，而凤尾鱼、沙丁鱼、毛鳞鱼的数量激增。