Using Isoscapes to Trace the Movements and Foraging Behavior of Top Predators in Oceanic Ecosystems

The inability to directly observe the long distant movements of marine predators and the vast extent of their pelagic habitat has hindered our understanding of their movements, distribution, and foraging behavior. Recently these challenges have spurred the development of new methods to examine animal movements remotely, including advancements in electronic tags (Holland et al. 1990; Stewart and DeLong 1995; Lutcavage et al. 1999; Biuw et al. 2007). Electronic tagging is generally limited to studying individual movements of a relatively small number of large individuals. However, the launch of extensive tagging campaigns (e.g., Block et al. 2005) and advancements in tag-to-tag communication could circumvent the