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GROUP MEETING 2010/04/13 R98229014 Kirsten Feng CLIMATE-DRIVEN CHANGES IN ABUNDANCE AND DISTRIBUTION OF LARVAE OF OCEANIC FISHES IN THE SOUTHERN CALIFORNIA REGION CHIH-HAO HSIEH, HEY JIN KIM, WILLIAM WATSON, EMANUELE DI LORENZO and GEORGE SUGIHARA Motivation For fishes, climate change has significant influences on their abundances and distributions by affecting their survival, growth, reproduction, and migration, or through their responses to changes in food supply. Although El Nino effects on species composition were noted, long-term variability of abundances of selected species were examined, and decadal changes in distributions of oceanic fishes were illustrated in atlases, no systematic study has been carried out to examine these changes. Dataset and comparison Both fish data and SST data are from CalCOFI Comparison: Fish data PDO SOI NPGO NPI Conclusion Climate change has had significant effects on the abundances of oceanic fishes, and to a lesser extent on their geographic distributions. Nevertheless, we found that ecologic traits (mesopelagic vs. vertical-migrating) played an important role in determining the sensitivity of fish in response to climate variations. Apparently, climate change has effects on not only population but also ecosystem level properties. THANK YOU ~ *