Still standing: the heat protection delivered by a facultative symbiont to its aphid host is resilient to repeated thermal stress

This is the dataset for the article "<strong>Still standing: the heat protection delivered by a facultative symbiont to its aphid host is resilient to repeated thermal stress</strong>". This experimental study focused on the heat-protective mutualism between the pea aphid <strong><em>Acyrthosiphon pisum</em></strong> and the facultative bacterium <strong><em>Serratia symbiotica</em></strong>. We exposed two aphid lines (5A: deprived of <em><strong>S. symbiotica</strong></em>, 5AR: infected by <strong><em>S. symbiotica</em></strong>) to a varying number of heat shocks (35°C for 2 h) applied during insect immature development: none (control), one, two, or three. We recorded aphid immature survival rate, total longevity, immature development time, lifetime fecundity and hind tibia length (body size). . Individual = identification of the individual . Line = aphid clonal line, either deprived of (5A) or infected by <em><strong>S. symbiotica</strong> </em>(5AR) . Temp = thermal treatment, defined by the number of heat shocks applied during aphid juvenile life (0 = control, 1, 2 or 3) . Survival = whether (Y) or not (N) the individual survived until reproduction . Adulthood = time elapsed between birth and first reproduction (in days) . Longevity = time elapsed between birth and death (in days) . Fecundity = total number of larvae produced by each aphid throughout lifetime . Wing = whether (Y) or not (N) the individual developed wings following imaginal moult . Tibia = hind tibia length as a proxy of body size (in mm)