Purse seining makes it difficult to protect fish populations, he said.

他说，围网捕鱼使保护鱼类种群变得困难。

Many industrial fishing boats use a method called purse seining.

许多工业渔船使用一种叫做围网捕鱼的方法。

The EU has been accused of using methods like purse seining.

欧盟因使用围网捕鱼等方法而被指责。

It also said that it would ban purse seining if science supported a ban.

它还表示，如果科学支持禁令，它将禁止围网捕鱼。