Data from: Independent lineages in a common environment: the roles of determinism and contingency in shaping the migration timing of even- versus odd-year pink salmon over broad spatial and temporal scales ...

• Main Authors: Oke, Krista B., Cunningham, Curry J., Quinn, Thomas P., Hendry, Andrew P.
• Format: Dataset
• Language: English
• Published: Dryad 2019
• Subjects: Parallel evolution; pink salmon; Oncorhynchus gorbuscha; evolutionary history; Weir; Pink salmon
• Online Access: https://dx.doi.org/10.5061/dryad.n8k0mq1; https://datadryad.org/stash/dataset/doi:10.5061/dryad.n8k0mq1

Studies of parallel evolution are seldom able to disentangle the influence of cryptic environmental variation from that of evolutionary history; whereas the unique life history of pink salmon (Oncorhynchus gorbuscha) presents an opportunity to do so. All pink salmon mature at age two and die after breeding. Hence, pink salmon breeding in even years are completely reproductively isolated from those breeding in odd years, even if the two lineages breed in same location. We used time series (mean = 7 years, maximum = 74 years) of paired even- and odd-year populations from 36 rivers spanning over 2000 km to explore parallelism in migration timing, a trait with a strong genetic basis. Migration timing was highly parallel, being determined almost entirely by local environmental differences among rivers. Interestingly, interannual changes in migration timing different somewhat between lineages. Overall, our findings indicate very strong determinism, with only a minor contribution of contingency. ... : Estimated median date of returnMedian date of return estimated by fitting a normal distribution to daily count data for each year and river combination. Column "year" gives the year the data were sampled and "river" gives the sampling location or weir at which data were sampled. "Run" is determined based on whether the data was collected during an even year (even-year lineage) or odd year (odd-year lineage). Columns "lat" and "long" are latitude and longitude, respectively, and "z_score_lat" is the z-score of latitude. Column "day_of_year" is the estimated median return date, recorded as Julian date.pink_salmon_median_date_return.csvDaily count of migrating pink salmonRaw daily count data for each year and river combination. Column "river" provided the name of the river or weir where data were sampled and "year" provides the year in which sampling occurred. Column "count" provides the number of pink salmon that migrated upstream through the weir on the date given in column "day_of_year" (as Julian date). ...