SS1.02 Geochemical Tracers in Calcified Structures: Implications for Fisheries Research
Date: Tuesday, June 11, 2002
Time: 9:30:00 AM
Location: Carson A
 
SwearerSE, The University of Melbourne, Parkville, Australia, sswearer@unimelb.edu.au
Sheehy, M, S, The University of California, Santa Barbara, USA, sheehy@lifesci.ucsb.edu
Warner, R, R, The University of California, Santa Barbara, USA, warner@lifesci.ucsb.edu
 
WHAT CAN OTOLITH MICROCHEMISTRY TELL US ABOUT LARVAL DISPERSAL? METHODOLOGICAL ISSUES ASSOCIATED WITH THE ANALYSIS AND INTERPRETATION OF ELEMENTAL SIGNATURES.
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The potential for environmental markers to quantify levels of connectivity among marine populations over ecologically relevant time scales has resulted in a rapid increase in the number of studies applying this technique. However, the predictive power of this approach is currently hindered by our limited understanding of the mechanisms of trace element incorporation into otoliths and the methodological issues associated with otolith chemical analysis. Drawing from studies of larval dispersal in both tropical and temperate reef fishes, we show that otolith microchemistry is a powerful discriminator among larval populations, but reconstructing larval dispersal histories back to the source population is currently limited by our ability to resolve and interpret source population environmental signatures.