Reserve plan to protect fish.
The poll came ahead of the launch of a film, The End Of The Line, which reveals the impacts of over-fishing on the world's oceans.
The documentary, by journalist Charles Clover, claims that industrial fishing is emptying the seas of fish, destroying the livelihoods of poor fishermen in places such as Africa and killing wildlife which is accidentally caught.
As The End Of The Line was released, Mr Clover said: " The issue of over- fishing isn't just something for the most junior minister in the cabinet and EU - it's one of the world's most important problems and it's the big problem on 70% of the Earth's surface." * The film is previewed at FACT in Liverpool tonight at 6.30pm..