The effect of body condition of yellow-bellied marmots on time allocation to vigilance and food acquisition while foraging
Abstract
Condition can influence many traits. I looked at how condition affects time allocation while foraging for yellow-bellied marmots (Marmota flaviventris) by taking two minute focal samples of adults and yearlings and recording their behavior. Each focal was paired with measurements of condition collected from the nearest trapping date. Overall, condition did not affect time allocation for foraging. When the individuals were separated into age-sex cohorts, condition was not significantly correlated with time allocation for females. The sample size of adult males was too small to form any conclusions, but as condition improved time allocation to both foraging and looking increased. Yearling males had a moderately significant tendency to trade-off looking for foraging if they were in poorer condition. Yearling males may be the only group to respond because they are the only cohort that must disperse and condition may be essential for the survival of dispersing individuals.
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References (22)
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