Data from: Variation in chronotype is associated with migratory timing in a songbird
Published Jul 31, 2019 on Dryad.
Cite this dataset
Rittenhouse, Jeffrey; Robart, Ashley; Watts, Heather (2019). Data from: Variation in chronotype is associated with migratory timing in a songbird [Dataset]. Dryad. https://doi.org/10.5061/dryad.p226m8r
Like many organisms, birds exhibit daily (circadian) and seasonal biological rhythms, and within populations both daily and seasonal timing often vary among individuals. Because photoperiod interacts with the circadian rhythms of many organisms to induce seasonal changes in behavior and physiology, it is hypothesized that differences in daily timing, called chronotypes, underpin differences among individuals in the timing of seasonal events. For seasonal events stimulated by increasing daylength, this hypothesis predicts a positive relationship between the timing of daily and seasonal activities of individuals, with advanced chronotypes expressing events earlier in the year. The few previous tests of this hypothesis have focused on seasonal reproductive timing in birds. However, the hypothesis predicts that this relationship should extend to other photoinduced seasonal events. Therefore, we tested whether variation in chronotype was associated with variation in spring migratory timing in a captive songbird model, the pine siskin (Spinus pinus). We found that pine siskins expressing migratory restlessness exhibited repeatable chronotypes in their timing of nocturnal activity. Further, chronotype was significantly associated with the onset date of migratory behavior, consistent with the hypothesized relationship between chronotype and seasonal timing.
Data for Rittenhouse et al.
Data from Rittenhouse et al. "Variation in chronotype is associated with migratory timing in a songbird." Columns represent: bird ID, onset time of nocturnal activity, date of observation, day of observation relative to winter solstice, day of observation centered and scaled, onset date of migratory restlessness, onset day of migratory restlessness expressed as days since winter solstice, onset day of migratory restlessness centered and scaled, experimental group, sex.