1. Department of Ecology, Evolution & Marine Biology; University of California; Santa Barbara California 93106
2. IFM Biology, AVIAN Behavioural Genomics and Physiology Group; Linköping University; SE-581 83 Linköping Sweden
3. Department of Biology; Canisius College, Buffalo; New York 14208
4. Marine Science Institute; University of California; Santa Barbara California 93106