Data contain measurements of physiological variation in threespine stickleback from Icelandic populations. The data includes metabolic rates measured on individual stickleback fish across three temperatures (Metabolism.csv), inter-individual variation in distances between individuals under different temperature treatments using fish from a geothermal and ambient population (Sociability.csv), and the time individuals spent under different temperatures on their own (TemperaturePreference.csv). Full details about this dataset can be found at https://doi.org/10.5285/1c9cd70f-d0b8-49a7-a5d2-ba473a220e3e
