Should otters be controlled to protect fish stocks?

During the 1970s the survival of otters was threatened by a loss of habitats and they were rare in most parts of Britain. But this native species was brought back from the brink of extinction and numbers have recovered largely as a result of conservation work and improved water quality. via Pocket http://www.bbc.co.uk/news/uk-england-24231925#sa-ns_mchannel=rss&ns_source=PublicRSS20-sa