Distribution and species richness of pinnipeds (flippered mammals)
and marine turtles globally
From: Burke L, Kura Y, Kassem K, Revenga C, Spalding M, McAllister D. 2001.
Pilot Analysis of Global Ecosystems. Coastal Ecosystems. World Resources
Institute, ISBN 1-56973-458-5. Available on www.wri.org/wr2000