Migration timing metrics of 11 Atlantic salmon populations in Eastern Canada

This dataset contains migration timing metadata for Atlantic salmon (Salmo
salar) populations across 11 rivers in eastern Canada, spanning the
regions of Labrador, Newfoundland, and the Maritimes. For each site, the
dataset includes geographic coordinates, the Julian day at which 5 % and
95 % of the cumulative annual run was reached, and the run-timing modality
(unimodal or bimodal). Populations vary widely in migration timing, with
early runs beginning as early as day 145 and late runs extending beyond
day 288. Bimodal populations, found primarily in the Maritimes, display
two distinct peaks in migration timing, whereas unimodal populations in
Labrador and Newfoundland have a single, more continuous run. These data
provide baseline information on spatial variation in run timing and
migration modality in North American Atlantic salmon, enabling integration
with genetic, environmental, and climate projections to investigate the
ecological and evolutionary drivers of migration phenology.