Callum Roberts is at the University of York in England.

He has spent the last ten years studying the effects of fishing on marine life and seeking ways to improve ocean management. He has studied fisheries ranging from small-scale coral reef fisheries through to temperate industrial and deep-sea fisheries. His work with the World Conservation Union Species Survival Commission has shown that many marine species, just like their terrestrial counterparts, are threatened with extinction by exploitation, habitat degradation and destruction. However, he has also shown that marine reserves can be highly effective in rebuilding depleted populations, fostering habitat recovery and improving fishery catches.

Recently he was a member of the Marine Reserves Working Group at the National Center for Ecological Analysis and Synthesis in Santa Barbara, and of the National Research Council Committee on Marine Protected Areas.

With Julie Hawkins, he has recently written a book on marine reserves, which was published by the World Wildlife Fund Endangered Seas Campaign. This provides accurate and up-to-date information about reserves to people considering establishing them. He has worked closely with fishers in Britain and Europe to evaluate the potential application of marine reserves to their fisheries. In 2000 he was awarded a Pew Fellowship in Marine Conservation, and in 2001 was Hardy Visiting Professor of Conservation Biology at Harvard University. Currently he is writing a book on the environmental history of the oceans.