Synchrony in local population dynamics of stream-dwelling Dolly Varden: do genetically similar groups show similar demography?

摘要

We investigated the relationship between genetic divergence and demographic dependence. Genetically related groups may consist of the same demographic unit or a single 'population,' because high levels of dispersal may synchronize population dynamics. We examined this hypothesis by assessing the levels of synchrony in seven demographic parameters among locations supporting stream-dwelling Dolly Varden. We analyzed synchrony using demographic data collected over 10 years in five neighboring tributary streams (<7 km) where little genetic divergence was observed. The overall synchrony was moderate for age-0+ and >=age-1+ (average cross-correlation coefficient