Document Type: Research Article
Affiliations: 1: Department of Zoology, The University of British Columbia, 6270 University Boulevard, Vancouver, BC V6T 1Z4, Canada. 2: Earth and Ocean Sciences, The University of British Columbia, 6339 Stores Road, Vancouver, BC V6T 1Z4, Canada. 3: Fisheries and Oceans Canada, Bedford Institute of Oceanography, Ecosystem Research Division, P.O. Box 1006, Dartmouth, NS B2Y 4A2, Canada.
Publication date: September 30, 2011