Onset of autumn shapes the timing of birth in Pyrenean chamois more than onset of spring

摘要: In seasonal environments, birth dates are a central component for species' life history, with potential long-term fitness consequences. Yet our understanding of selective pressures environmental changes on is limited in wild mammals due to the difficulty data collection. context rapid climate change, question possible mismatch between plant phenology and also remains unanswered most species. We assessed whether how timing mountain mammal (isard, named Pyrenean chamois, Rupicapra pyrenaica pyrenaica) tracked growing season, accounting maternal traits, individual heterogeneity population density. not only focused spring conditions but what extent onset autumn can be driver phenological biological events compared magnitude response changes. relied 22-year study based intensively monitored marked individuals known age. Births were highly synchronized (80% kids born within 25 days) repeatable (84%; between-female variation 9.6 days, within-female 4.2 days). Individual phenotypic plasticity allows females respond rapidly interannual did prevent existence mismatch: 10-day advance or led 3.9 1.3 days dates, respectively. Our findings suggest that may act as cue induce important stages reproductive cycle (e.g. conception gestation length), subsequently affecting parturition stressed importance focusing during which show much lower adaptive than autumn. These results along high among will allow species cope demographic consequences