10.5061/DRYAD.3SV4P
Schutz, Heidi
Pacific Lutheran University
University of California System
Jamniczky, Heather A.
University of Calgary
Hallgrímsson, Benedikt
University of Calgary
Garland Jr., Theodore
University of California, Riverside
Garland, Theodore
University of California, Riverside
Data from: Shape-shift: semicircular canal morphology responds to
selective breeding for increased locomotor activity
Dryad
dataset
2014
Mus musculus domesticus
Semicircular canals
3D Data
Selection - Experimental
2014-07-17T18:30:55Z
2014-07-17T18:30:55Z
en
https://doi.org/10.1111/evo.12501
70849 bytes
1
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Variation in semicircular canal morphology correlates with locomotor
agility among species of mammals. An experimental evolutionary mouse model
was used to test the hypotheses that semicircular canal morphology (1)
evolves in response to selective breeding for increased locomotor
activity, (2) exhibits phenotypic plasticity in response to early-onset
chronic exercise, and (3) is unique in individuals possessing the
minimuscle phenotype. We examined responses in canal morphology to
prolonged wheel access and selection in laboratory mice from four
replicate lines bred for high voluntary wheel-running (HR) and four
nonselected control (C) lines. Linear measurements and a suite of 3D
landmarks were obtained from 3D reconstructions of μCT-scanned mouse
crania (μCT is microcomputed tomography). Body mass was smaller in HR than
C mice and was a significant predictor of both radius of curvature and 3D
canal shape. Controlling for body mass, radius of curvature did not differ
statistically between HR and C mice, but semicircular canal shape did.
Neither chronic wheel access nor minimuscle affected radius of curvature
or canal shape These findings suggest that semicircular canal morphology
is responsive to evolutionary changes in locomotor behavior, but the
pattern of response is potentially different in small- versus large-bodied
species.
Dryad_Data_for_14-0032.R1Semicircular canal shape and linear data for
14-0032.R1