Dulvy, N.K., J.K. Baum, S. Clarke, L.J.V. Compagno, E. Cortes, et al. 2008. You can swim but you can’t hide: the global status and conservation of oceanic pelagic sharks and rays. Aquatic Conservation: Marine and Freshwater Ecosystems 18(5):459-482.
Read the Aquatic Conservation article (PDF).