How many cubs can a mum nurse? Maternal age and size influence litter size in polar bears
Abstract
Life-history theory predicts that females' age and size affect the level of maternal investment in current reproduction, balanced against the future reproductive effort, maintenance and survival. Using long-term (30 years) individual data on 193 female polar bears ( Ursus maritimus ), we assessed age- and size-specific variation on litter size. Litter size varied with maternal age, younger females had higher chances of losing a cub during their...
Paper Details
Title
How many cubs can a mum nurse? Maternal age and size influence litter size in polar bears
Published Date
May 1, 2019
Journal
Volume
15
Issue
5
Pages
20190070 - 20190070
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