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Genetic Variation in Populations of the Ghost Shrimp Genus Callichirus (Crustacea: Decapoda: Thalassinoidea) in the Western Atlantic and Gulf of Mexico

Author： Staton Joseph L. Felder Darryl L.

Publisher： University of Miami - Rosenstiel School of Marine and Atmospheric Science

ISSN： 0007-4977

Source： Bulletin of Marine Science, Vol.56, Iss.2, 1995-03, pp. : 523-536

Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.

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Abstract

Two ghost shrimp species (Callichirus major and C. islagrande) were sampled along their western Atlantic ranges (8 and 9 locations, respectively). Both species possessed six polymorphic loci and 15 monomorphic loci. Genetic differentiation between Atlantic and Gulf populations of C. major suggests that peninsular Florida is a significant barrier to gene flow. A single collection of C. sp. (nr. major) from Colombia was genetically distinct from all components of the North American C. major complex. Populations of C. islagrande consisted of two genetically definable components separated geographically by the Chenier Plain in western Louisiana. The eastern Gulf of Mexico population was further structured by slight genetic differentiation that coincided with a break in distribution of sibling species of pinnotherid commensals (Pinnixa cristata complex) which occupy the burrows of these animals.

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