Geometric morphometric investigation of craniofacial morphological change in domesticated silver foxes.
Sci Rep
; 11(1): 2582, 2021 01 28.
Article
in En
| MEDLINE
| ID: mdl-33510282
ABSTRACT
To test the effects of domestication on craniofacial skeletal morphology, we used three-dimensional geometric morphometrics (GM) along with linear and endocranial measurements to compare selected (domesticated) and unselected foxes from the Russian Farm-Fox Experiment to wild foxes from the progenitor population from which the farmed foxes are derived. Contrary to previous findings, we find that domesticated and unselected foxes show minimal differences in craniofacial shape and size compared to the more substantial differences between the wild foxes and both populations of farmed foxes. GM analyses and linear measurements demonstrate that wild foxes differ from farmed foxes largely in terms of less cranial base flexion, relatively expanded cranial vaults, and increased endocranial volumes. These results challenge the assumption that the unselected population of foxes kept as part of the Russian Farm-Fox experiment are an appropriate proxy for 'wild' foxes in terms of craniofacial morphology and highlight the need to include wild populations in further studies of domestication syndrome to disentangle the phenotypic effects of multiple selection pressures. These findings also suggest that marked increases in docility cannot be reliably diagnosed from shape differences in craniofacial skeletal morphology.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Foxes
Limits:
Animals
Language:
En
Journal:
Sci Rep
Year:
2021
Document type:
Article
Affiliation country: