10.1594/PANGAEA.973493Spence-Jones, HelenHelenSpence-Jones0000-0002-2331-5510Alfred Wegener Institute - Wadden Sea Station SyltShama, Lisa N SLisa N SShama0000-0002-9017-9950Alfred Wegener Institute - Wadden Sea Station SyltPANGAEA2025clutch sizeegg diameterExperimentfertilization successGasterosteus aculeatushatching successLaboratory experimentLengthsticklebackWeightSpecies, unique identificationSpecies, unique identification (Semantic URI)Species, unique identification (URI)Type of studyIdentificationSexTreatmentFish, standard lengthFish, wet massTrawl netInternational Science Program for Integrative Research in Earth Systems (AWI_INSPIRES)2022-02-03T00:00:00/2022-03-10T00:00:00Dataset10.1594/PANGAEA.97348710.1098/rspb.2024.2913740 data pointstext/tab-separated-valuesCreative Commons Attribution 4.0 InternationalFish were brought to the laboratory at the AWI Wadden Sea Station Sylt and used as breeding adults for a multi-generation laboratory experiment investigating the effects of marine heatwaves on stickleback fitness-related traits. These F0 generation wild-caught adults (males and females) were acclimated to three heatwave scenarios (no heatwave control, single heatwave or double heatwave) for three months before breeding (starting 12 June 2022) via artificial fertilization.8.43655.0252Island of Sylt, GermanyAlfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhavenhttps://doi.org/10.13039/501100003207INSP-2021Do you remember? Epigenetic and ecological memory to climate variability and extreme events