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1 August 2000 POSTNATAL GROWTH AND AGE ESTIMATION IN FREE-RANGING BATS: A COMPARISON OF LONGITUDINAL AND CROSS-SECTIONAL SAMPLING METHODS
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Abstract

Estimates of postnatal growth rates and age based on data collected from free-ranging little brown myotis (Myotis lucifugus) captured sequentially at the same colony in the same year were used to compare longitudinal (mark–recapture) and cross-sectional (grab) sampling methods. Analyses of these data indicate that cross-sectional sampling significantly underestimates growth rates for length of forearm, body mass, and length of epiphyseal gap. Equations based on cross-sectional samples significantly overestimated ages of young, as compared with equations based on the longitudinal method. These results support the hypothesis that cross-sectional sampling is unreliable for deriving postnatal growth curves for free-ranging bats and emphasize the importance of using longitudinal data to derive growth rates and estimates of age during the postnatal period.

Tony L. Baptista, Christopher S. Richardson, and Thomas H. Kunz "POSTNATAL GROWTH AND AGE ESTIMATION IN FREE-RANGING BATS: A COMPARISON OF LONGITUDINAL AND CROSS-SECTIONAL SAMPLING METHODS," Journal of Mammalogy 81(3), 709-718, (1 August 2000). https://doi.org/10.1644/1545-1542(2000)081<0709:PGAAEI>2.3.CO;2
Received: 14 January 1999; Accepted: 19 November 1999; Published: 1 August 2000
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