Phenological shifts in out-migrating juvenile Pacific salmon ...

• Main Authors: Wilson, Samantha M., Moore, Jonathan W., Ward, Eric J., Kinsel, Clayton W., Anderson, Joseph H., Buehrens, Thomas W., Carr-Harris, Charmaine N., Cochran, Patrick C., Davies, Trevor D., Downen, Mark R., Godbout, Lyse, Lisi, Peter J., Litz, Marisa N.C., Patterson, David A., Selbie, Daniel T., Sloat, Matthew R., Suring, Erik J., Tattam, Ian A., Wyatt, Garth J.
• Format: Dataset
• Language: English
• Published: Dryad 2023
• Subjects: FOS Biological sciences; Phenology; migration; Climate change; Pacific Salmon; Keta; Pacific; Sockeye; Weir; Pink salmon; Alaska
• Online Access: https://dx.doi.org/10.5061/dryad.dfn2z356g; https://datadryad.org/stash/dataset/doi:10.5061/dryad.dfn2z356g

This dataset contains the rates of change in juvenile migration timing of 66 Pacific salmon populations ranging from Oregon to Alaska, the rates of change in timing of the initiation of spring phytoplankton bloom in nearby coastal regions, and covariates. Species represented in this dataset include coho salmon (Oncorhynchus kisutch), sockeye salmon (O. nerka), Chinook salmon (O. tshawytscha), pink salmon (O. gorbuscha), chum salmon (O. keta), and steelhead trout (O. mykiss). Rates of change in salmon phenology includes rate of change in peak date, and rate of change in range (number of days between 25th and 75th quantile of migration). ... : This dataset represents the rates of change in juvenile salmon outmigration phenology. Rates of change were determined using the 'phenomix' R package from either daily outmigration counts, or mark-recapture corrected abundance estimates. In general, juvenile salmon were intercepted during their migration to the ocean using a full fence weir, partial fence weir, rotary screw trap, incline plane trap, floating trap, or seine. Individuals were identified to species, counted, and released. Mark recapture expanded estimates were only used when more than three stratified time estimates within a year were made. All rates of change were calculated from datasets with at least 20 years of outmigration timing data, with at least 15 sampling days per year. The longest dataset began in 1951. Rates of change in phenology were determined for the full dataset and for a subset of years spanning 1999 - 2019 (to match with availability of chlorophyll-a concentration data). In addition to rates of change in juvenile salmon ...