Influence of captivity and selection on limb long bone cross-sectional morphology of reindeer.
Rangifer tarandus
bone cross-section
domestication signal
geometric morphometrics
morpho-functional adaptation
Journal
Journal of morphology
ISSN: 1097-4687
Titre abrégé: J Morphol
Pays: United States
ID NLM: 0406125
Informations de publication
Date de publication:
10 2021
10 2021
Historique:
revised:
09
07
2021
received:
10
05
2021
accepted:
22
07
2021
pubmed:
30
7
2021
medline:
26
11
2021
entrez:
29
7
2021
Statut:
ppublish
Résumé
The emergence of pastoralism and animal husbandry has been a critical point in the history of human evolution. Beyond profound behavioural changes in domesticated animals compared to wild ones, characterising the morphological changes associated with domestication process remains challenging. Because reindeer (Rangifer tarandus) can be considered to still be in the early phases of the domestication process, the study of modern populations provides a unique opportunity to examine the impact of captivity and selective breeding on skeletal changes. In this work, we investigated the morphological changes in long limb bone cross-sections using 137 wild and domestic reindeer individuals bred in free-range, in captivity or used for racing and pulling. The shape and shaft cortical thickness of the six long limb bones (i.e., humerus, radioulna, metacarpal, femur, tibia and metatarsal) were measured using a 2D-geometric morphometrics approach taking into account subspecies, sex, body mass and lifestyle differences. These bones are important to understanding functional morphological changes because they can provide information on feeding and locomotor behaviours, as well as on body propulsion and weight bearing. Apart from the effects of taxonomy, etho-ecology and sex, we have found that captivity and selection induced important variations in the size and body mass of modern reindeer. Our results also showed that patterns of variation in cortical bone thickness of long limb bone cross-sections were strongly impacted by body mass and human-imposed restrictions in roaming. This demonstrates that bone cross-sections can provide information on changes in locomotor, reproductive and feeding behaviours induced by the domestication process. These results are valuable not only for (paleo) biologists studying the impact of captivity and selection in ungulates but also for archaeologists exploring the origins of domestication and early herding strategies.
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
1533-1556Informations de copyright
© 2021 The Authors. Journal of Morphology published by Wiley Periodicals LLC.
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