we've got signatures, help us get to 40,000 by August 8, 2013
* Global estimates of shark catches using trade records from commercial markets, Shelley C. Clarke, Murdoch K. McAllister, E. J. Milner-Gulland, G. P. Kirkwood, Catherine G. J. Michielsens, David J. Agnew, Ellen K. Pikitch, Hideki Nakano and Mahmood S. Shivji, Ecology Letters, (2006) 9: 1115-1126
* Third of open ocean sharks threatened with extinction, International Union for the Conservation of Nature (IUCN) Shark Specialist Group, June 2009
* Cascading top-down effects of changing oceanic predator abundances. Journal of Animal Ecology. Vol. 78. p. 699. Baum & Worm. 2009.
* Collapse and Conservation of Shark Populations in the Northwest Atlantic, Science, Volume 299, Julia K. Baum, Ransom A. Myers, Daniel G. Kehler, Boris Worm, Shelton J. Harley, Penny A. Doherty, 2003.
* Life Histories and Vulnerability to Exploitation of Elasmobranchs: Inferences from Elasticity, Perturbation and Phylogenetic Analyses -- Frisk et al. 2005
* Cascading Effects of the Loss of Apex Predatory Sharks from a Coastal Ocean. Ransom A. Myers, et al. Science 315, 1846 (2007).
* Research Shows Overfishing of Sharks Key Factor in Coral Reef Decline, Scripps News April 11, 2005
* The effects of fishing on sharks, rays, and chimaeras (chondrichthyans), and the implications for marine ecosystems. - ICES Journal of Marine Science, 57: 476-494.See p. 488 for the tuna reference. Stevens, J. D., Bonfil, R., Dulvy, N. K., and Walker, P. A. 2000
* The effects of fishing on sharks, rays, and chimaeras (chondrichthyans), and the implications for marine ecosystems, ICES Journal of Marine Science, 57: 476-494.See p. 488 for the tuna reference. Stevens, J. D., Bonfil, R., Dulvy, N. K., and Walker, P. A. 2000
* High apex predator biomass on remote Pacific islands, Charlotte Stevenson, Laure S. Katz, Fiorenza Micheli, Barbara Block, Kimberly W. Heiman, Chris Perle, Kevin Weng, Robert Dunbar, Jan Witting