James A. Estes, Ph.D.


James A. Estes, Ph.D.
University of California at Santa Cruz
[email protected]
Award year


James Estes, a professor at the University of California, Santa Cruz, is an international expert on sea otters and a specialist in the critical role of apex predators in the marine environment. Estes used his Pew fellowship to investigate whether industrial whaling in the North Pacific Ocean following World War II could provide an explanation for the disruption of this ecosystem. He suspected that the selective removal of large whales from the North Pacific may have left their foremost natural predator, the killer whale, lacking one of its significant food sources. Estes organized an international symposium on the influence of whales and whaling on ocean ecosystems. The symposium was held in April 2003 in Santa Cruz, California. More than 50 experts from around the world attended. Although the problem is both complex and highly controversial, Estes and his colleagues succeeded in providing a credible argument that whaling was a significant driver in the megafaunal collapse and, thus, that the restoration of great whale stocks to something resembling pre-exploitation levels may be a necessary prerequisite for restoring this ecosystem. This work received extensive international press coverage.

To learn more about Estes, visit his bio online: http://www.coastalresearchcenter.ucsb.edu/cmi/VitaEstes.html.

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