Alpine marmots
cooperative breeding
helper repayment hypothesis
Marmota marmota
sex ratios
Local resource competition
cooperatively breeding birds
seychelles
warblers
social-behavior
evolution
selection
female
mammals
model
nest
[SDE.BE] Environmental Sciences/Biodiversity and Ecology
[SDV.BID] Life Sciences/Biodiversity
[SDV.EE] Life Sciences/Ecology, environment