Use of geolocators for investigating breeding ecology of a rock crevice-nesting seabird: method validation and impact assessment

1: Investigating ecology of marine animals, imposes a continuous challenge due to their temporal and/or spatial unavailability. Light-based geolocators (GLS) are animal-borne devices that provide relatively cheap and efficient method to track seabird movement and are commonly used to study migration. Here we explore the potential of GLS data to establish individual behaviour during the breeding period in a rock crevice-nesting seabird, the Little Auk, Alle alle. 2: By deploying GLS on 12 breeding pairs, we developed a methodological workflow to extract birds’ behaviour from GLS data (nest attendance, colony attendance and foraging activity), and validated its accuracy using behaviour extracted from a well-established method based on video recordings. We also compared breeding outcome, as well as behavioural patterns of logged individuals with a control group treated similarly in all aspects except for the deployment of a logger, to assess short-term logger effects on fitness and behavio..., Please see method section of paper entitled \"Use of geolocators for investigating breeding ecology of a rock crevice-nesting seabird: method validation and impact assessment\" published in Ecology and Evolution for detailed description of methods., All data manipulations and statistical analysis were made in R version 4.1.2 (R Core Team 2021).
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