Roland Gauvain, manager of the Alderney Wildlife Trust, said the results of the research were exciting.

BBC: Les Etac gannetry

Mr Gauvain said that future changes in fishing practices could have more of an effect on local sea birds.

BBC: Les Etac gannetry

Mr Gauvain said the slick could have already damaged marine life.

BBC: Alderney Wildlife Trust concern for birds in oil slick