Reproductive success of colonial and Noncolonial female yellow-bellied marmots (Marmota flaviventris) [Succès reproducteur des marmottes à ventre jaune femelles coloniales et noncoloniales].

Résumé

Previous work comparing reproductive success of colonial and noncolonial yellow-bellied marmots (Marmota flaviventris) indicated that noncolonial females had lower fitness they reproduced less often and their offspring had a lower survival to age l year. This work, however, may have been affected by a bias in sampling effort. We initiated a new study and found no significant differences between colonial and noncolonial females in litter size or frequency of reproduction. We did, however, recapture a lower percentage of noncolonial offspring as yearlings this may have resulted from early dispersal, higher mortality, or both. Further, survival of noncolonial offspring from age l to 2 years was lower