Norwegian Marine Data Centre, Institute of Marine Research, P.O. Box 1870, N-5817 Bergen, Norway.|Norwegian Marine Data Centre, Institute of Marine Research, P.O. Box 1870, N-5817 Bergen, Norway.|Norwegian Marine Data Centre, Institute of Marine Research, P.O. Box 1870, N-5817 Bergen, Norway.|Norwegian Marine Data Centre, Institute of Marine Research, P.O. Box 1870, N-5817 Bergen, Norway.