Possible effects on the penguins must also be studied by U.S. sea fisheries currently operating in Antarctica.

目前在南极洲作业的美国海洋渔业部门也必须研究对企鹅可能造成的影响。

Here be it said, that this pertinacious pursuit of one particular whale, continued through day into night, and through night into day, is a thing by no means unprecedented in the South sea fishery.

这里应该说一下，这种执拗地追击一头特定的鲸鱼，持续不断地从白天追到晚上，从晚上追到白天，在南海捕鲸业中绝不是前所未有的事。