No evidence of hyperphagia during pre-hibernation in a northern population of little brown bats (Myotis lucifugus)

Liam McGuire, Kristina A Muise, Anuraag Shrivastav, Craig KR Willis

Research output: Contribution to journalArticlepeer-review

Abstract

During autumn, temperate bats must deposit fat stores for hibernation. Populations at high latitudes face four challenges: a shorter active season and shorter nights during the active season (less time to accumulate fat), a longer hibernation period (larger fat store needed), and colder nighttime temperatures (reduced prey availability). Mating also occurs during the pre-hibernation period, placing time constraints for mating and fattening on northern populations. We tested the hypothesis that these factors constrain pre-hibernation foraging in northern populations of little brown bats (Myotis lucifugus LeConte, 1831). We used plasma metabolite analysis to study pre-hibernation fueling rates of a population near the northern range limit of the species, and compared our results with previously published results from a more southern population. In contrast to lower-latitude bats, we found consistently low concentrations of plasma triglycerides, indicating a low fuelling rate throughout
Original languageEnglish
Pages (from-to)821-827
JournalCanadian Journal of Zoology
DOIs
StatePublished - Oct 18 2016

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