Ecological, evolutionary and social constraints on reproductive effort: are hoary marmots really biennial breeders?

In a general linear model of body condition index as a function of Julian day, breeding state, and an interaction term, all three terms were highly significant (p<0.005).

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This last hypothesis is consistent with our fecundity model selection results, which showed a weak trend for average fecundity to decline during winters with thin snowpack (high PDO values) while breeding effort did not.

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