A genetically distinct hybrid zone occurs for two globally invasive mosquito fish species with striking phenotypic resemblance.

ABSTRACT: Hybrid zones allow for the investigation of incipient speciation and related evolutionary processes of selection, gene flow, and migration. Interspecific dynamics, like competition, can impact the size, shape, and directional movement of species in hybrid zones. Hybrid zones contribute to a paradox for the biological species concept because interbreeding between species occurs while parental forms remain distinct. A long-standing zone of intergradation or introgression exists for eastern and western mosquito fish (Gambusia holbrooki and G. affinis) around Mobile Bay, AL. The region has been studied episodically, over decades, making it perfect for addressing temporal dynamics and for providing a deeper understanding of the genetics of these periodically reclassified fishes (as speci

SUBMITTER: Wilk RJ 

PROVIDER: S-EPMC5167044 | biostudies-literature | 2016 Dec

REPOSITORIES: biostudies-literature