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Brachaspis robustus is an endangeredgrasshopper endemic to South Island, NewZealand. It is both rare and localised;occupying low altitude floodplain terraces andbraided riverbeds of the Mackenzie Basin. Thisis in stark contrast to the two other speciesin this genus (B. nivalis and B.collinus) which occupy montane habitats.Mitochondrial and nuclear sequence data wereemployed to explore genetic diversity...
We screened genetic variation in a polytypicorganism, whose populations are oftendistributed into numerous isolated habitats,and integrated the results into a critique ofdefining ``units'' of conservation for organismswith highly fragmented populations. Sixteenpopulations of brown trout Salmo truttaL. across 8 Portuguese river basins werescreened for variation at 5 loci (mtDNA andallozymes). Population...
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