Roads to isolation: Similar genomic history patterns in two species of freshwater crabs with contrasting environmental tolerances and range sizes.

ABSTRACT: Freshwater species often show high levels of endemism and risk of extinction owing to their limited dispersal abilities. This is exemplified by the stenotopic freshwater crab, Johora singaporensis which is one of the world's 100 most threatened species, and currently inhabits less than 0.01 km² of five low order hill streams within the highly urbanized island city-state of Singapore. We compared populations of J. singaporensis with that of the non-threatened, widespread, abundant, and eurytopic freshwater crab, Parathelphusa maculata, and found surprisingly high congruence between their population genomic histories. Based on 2,617 and 2,470 genome-wide SNPs mined via the double-digest restriction-associated DNA sequencing method for ~90 individuals of J. 

SUBMITTER: Tay YC 

PROVIDER: S-EPMC5938456 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature