Affiliation: | Habitat Ecology Division, Bedford Institute of Oceanography, P.O. Box 1006 Dartmouth, Nova Scotia, Canada B2Y 4A2;Station Biologique, CNRS and Universite Paris 6, BP 74, 29682 Roscoff Cedex, France;Biology Department, Dalhousie University, Halifax, Nova Scotia B3H 4J1;Biological Oceanography Division, Bedford Institute of Oceanography, P.O. Box 1006 Dartmouth, Nova Scotia, Canada B2Y 4A2 |