Genetic differentiation of gammarid (Eulimnogammarus cyaneus) populations in relation to past environmental changes in lake baikal

摘要: Publisher Summary The gammarid Eulimnogammarus cyaneus,endemic to Lake Baikal, occurs exclusively in the littoral zone of stony or rocky shore lake. Individuals gammarid, cyaneus Baikal are genetically differentiated into two major groups, largely corresponding bathymetric division lake between north and south-central basins. As there appears be no extrinsic (physical) barrier genetic mixing them present state lake, groups considered separated different parts thereafter came contact at a narrow marginal their distribution, around Olkhon Strait. southern group is further Angara River outlet, which perhaps caused by formation as reproductive during Late Pleistocene. situation populations on Island complicated. Two (24 25) southwest coast closely related group, whereas those other areas akin northern group. It likely that secondary after breakdown previously existed barrier. In zone, some special mechanism such hybrid may operating. However, this needs substantiated future studies.