Gene flow over the spatial scale of the entire Caribbean basin is constrained by oceanic distance, which may impede the natural recovery of overfished L. gigas populations. 40), which acted to isolate local populations. Gene flow across the greater Caribbean was constrained by oceanic distance ( p =. Significant levels of genetic differentiation were identified between Caribbean countries ( F CT = 0.011 p = .0001), within Caribbean countries ( F SC = 0.003 p = .001), and among sites irrespective of geographic location ( F ST = 0.013 p = .0001). Our study found that L. gigas does not form a single panmictic population in the greater Caribbean. We tested the alternate hypotheses: (1) SGS is randomly distributed in space or (2) pairwise genetic structure among sites is correlated with oceanic distance (IBOD). Population genetic and multivariate analyses characterized SGS. We genotyped 643 individuals with nine microsatellites.
Nineteen locations in the greater Caribbean from Anguilla, the Bahamas, Belize, Caribbean Netherlands, Honduras, Jamaica, Mexico, Turks and Caicos, and the USA. Caribbean countries were presented as major populations to examine transboundary patterns of population differentiation. We performed a detailed study of SGS and genetic diversity throughout the overharvested queen conch ( Lobatus gigas) fishery. A detailed understanding of spatial genetic structure (SGS) and the factors driving contemporary patterns of gene flow and genetic diversity are fundamental for developing conservation and management plans for marine fisheries.
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