RT journal article
T1 Searching for indicators of age, sex and population in European mouflon mandibles
A1 Azorit, Concepción
A1 Jiménez Tenorio, Manuel
A1 Casinos, Adrià
A1 Lopez Montoya, Antonio Jesús
A1 Lopez-Fuster, María José
A1 Rocha Barbosa, Oscar
A2 Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica
K1 environmental constraints in Mediterranean ecosystems
K1 geometric morphometrics
K1 mandibles
K1 mouflon
K1 growth modeling
K1 Von Bertalanffy model
AB Mandibles from separate populations of free-living mouflons (Ovis aries musimon) from Southern Spain, submitted to different ecological conditions, were studied. Searching for ontogenetic shape variations we used geometric morphometrics tools and we explored the use of several mathematical models for describing growth rate variations between populations and sexes. A strong allometry was detected with variations in shape mainly matching with molar and premolar eruption. Mandible shape did not vary significantly with sex nor was sexual size dimorphism detected in adults, whatever the population. By modeling growth we detected differences between populations in all parameters such as the maturity rate describing precocity, and the time it took to reach asymptotic size (varying from 9 up to 18 months). A longer period of growth did not result in a larger asymptotic size, but it led to smaller mandibles. Mouflons with relatively late teeth replacement, lower maturation rate and smaller adult size were those of the population submitted to extreme environmental conditions, like epizootic disease, droughts and ungulate overpopulations. We discuss how a delay in reaching mature size has probably an important subsequent impact on reproductive and life-history traits in this species. Being able to record the effects of density-dependent and density-independent factors, mandibles become a target of interest for ecological and management studies also on mouflons.
PB ASSOC TERIOLOGICA ITALIANA
SN 0394-1914
YR 2020
FD 2020
LK http://hdl.handle.net/10498/23894
UL http://hdl.handle.net/10498/23894
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 15-nov-2026