Data from manuscript "Coordination of parental performance is breeding phase-dependent in the Dovekie (Alle alle), a pelagic Arctic seabird", published in PlosOne, doi: 10.1371/journal.pone.0306796 br/>br/> Currently, parental care is becoming increasingly perceived as male and female cooperation, instead of being primarily shaped by sexual conflict. Most studies examining cooperating performance consider coordination of parental activities, and doing so focuses on a short time-window including only one stage of breeding (i.e., incubation or chick rearing period). Here, we considered the cooperation of breeding partners, investigating the coordination of parental care in a long-lived seabird species with long and extensive biparental care, the Dovekie (or Little Auk), Alle alle, and looked at the issue throughout the breeding season. To do so, we collected in a Dovekie colony in Svalbard (77◦00′ N, 15◦33′ E), some video recordings of Dovekie pairs during both stages of the breeding period, that were transformed into behavioral data after video analysis. The present dataset contains the data resulting from the video analysis, as well as the R script used to perform statistical analyses on these data, and a summary of the results of the statistical analyses. For instance, we tested whether coordination was subject to small-scale changes within each stage and whether there was a relationship between coordination levels across the two stages. We found that the level of parental coordination is overall high and increases during the incubation period but decreases through the chick rearing phases. These results suggest that coordination is not a fixed behavior but breeding-phase dependent and provide insights into how parental care and parents’ cooperation is shaped by brood

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