Litter sex composition influences dominance status of Alpine marmots (Marmota marmota)

摘要: In social species, the hierarchical status of an individual has important consequences for its fitness. While many studies have focused on condition to explain access dominance, very few investigated influence environment, especially during early life. Yet it is known that environmental conditions in life may several traits at adulthood. Here, we examine environment accession dominance by investigating litter size and sex composition survival probability ascending later using a 20-year dataset from wild population Alpine marmots (Marmota marmota). Although had no effect fate individuals, affected male juvenile both female probabilities reaching dominant when adult. Male juveniles incur lower number increases, individuals sexes male-biased litters are more likely become than female-biased litters. However, absolute sisters litter, rather ratio, seems be predictor acquiring status: pups having less dominant. Several potential mechanisms these results discussed.