Natal Homing in a Marine Fish Metapopulation

Author:

Thorrold Simon R.1,Latkoczy Christopher2,Swart Peter K.3,Jones Cynthia M.1

Affiliation:

1. Department of Biological Sciences,

2. Laboratory for Isotope and Trace Element Research, Old Dominion University, Norfolk, VA 23529, USA.

3. Division of Marine Geology and Geophysics, Rosenstiel School of Marine and Atmospheric Science, University of Miami, 4600 Rickenbacker Causeway, Miami, FL 33149, USA.

Abstract

Identifying natal origins of marine fishes is challenging because of difficulties in conducting mark-recapture studies in marine systems. We used natural geochemical signatures in otoliths (ear bones) to determine natal sources in weakfish ( Cynoscion regalis ), an estuarine-spawning marine fish, in eastern North America. Spawning site fidelity ranged from 60 to 81%, comparable to estimates of natal homing in birds and anadromous fishes. These data were in contrast to genetic analyses of population structure in weakfish. Our findings highlight the need for consideration of spatial processes in fisheries models and have implications for the design of marine reserves in coastal regions.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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