| Enzyme and dispersal polymorphism in the saltmarsh carabid beetle <i>Pogonus chalceus</i> Marsham were compared between 30 Atlantic and nine Mediterranean European populations. Allozyme results showed that Mediterranean beetles (France, Spain) are genetically distinct from Atlantic populations. All Mediterranean beetles screened showed complete fixation at one locus (IDH1), which in Atlantic populations nearly always varied, whereas some unique Mediterranean alleles were observed for another locus (MPI). Genetic differentiation (allozymes) between Mediterranean populations, although highly significant, appeared to be much lower (F<sub>st</sub> = 0.098) than between Atlantic populations (F<sub>st</sub> = 0.178). Beetles... |
