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The Journal of Heredity 1979:70(3):175-180
© 1979 The American Genetic Association 70:175-180

research-article

Population genetics of penaeid shrimp from the Gulf of Mexico

L. J. LESTER

The author is affiliated with the Marine Science Program, Department of Biology, University of Houston, Houston, Texas 77004, and the Gulf Coastal Fisheries Lab, National Marine Fisheries Service, NOAA, 4700 Avenue U, Galveston, Texas 77550

Abstract

Three species of penaeid shrimp were analyzed for allozymic variation. Individuals from four collections of each species from widely separated locations in the. Gulf of Mexico were used to determine the amount of genic variation within and genetic differentiation among collec tions. Twenty-four loci were studied in each species and values were obtained for mean proportion of loci polymorphic in a population and average gene diversity within subpopulation. Nei's method of partitioning gene diversity in a subdivided population was employed. The values of absolute degree of gene differentiation, coefficient of gene differentiation, and mean gene identity between subpopulations indicate an absence of genetic differentiation among populations within species of Pent in the Gulf of Mexico. It is concluded that gene flow via larval dispersal and/or juvenile and adult movements is responsible for genetic continuity throOgh out the Gulf of Mexico.


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