Genetic patchiness among populations of queen conch

Allozymes were used to examine spatial and temporal com­ ponents of genetic variation among populations of queen conch in the Florida Keys and Bimini over a 4­ year period. Spatial and temporal genetic variation were both signifi­ cant (P 0.05) from the diver­ sity among years or samples within localities (GSL 0.60%). In addition, Florida Keys and Bimini populations were very similar genetically to those studied previously in the Carib­ bean Sea and Bermuda (mean Nei's I, 0.988). In general, populations of queen conch appear to be structured as a mosaic of spatial and temporal genetic patchiness within a continu­ um of high genetic similarity. This genetic similarity is presumably main­ tained by larval drift and gene flow. However, the observed patterns of genetic variation suggest a dynamic population structure. This structure may reflect presettlement stochastic events and processes in the marine environment.

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