TY - JOUR

T1 - Early developed section of the jaw as an index of prenatal growth conditions in adult roe deer Capreolus capreolus

AU - Høye, Toke Thomas

AU - Forchhammer, Mads Cedergreen

N1 - Keywords: Capreolus capreolus, cohort effects, development, environmental constraints, growth, jaw

PY - 2006

Y1 - 2006

N2 - Increasing evidence suggests that conditions in early life have important consequences for ultimate body size and fitness. Skeletal parts are often used as retrospective indices of body size and growth constraints because of their resistance to seasonal variation in resource availability. Yet, slow-maturing bones are poor predictors of resource limitations during early development, as later benign conditions may lead to compensatory growth. We analysed the temporal growth dynamics of different sections of the lower jaw of roe deer Capreolus capreolus and found that the medioanterior section of the lower jaw reaches 95% of asymptotic size already at 2-4 months post partum, whereas the posterior section reaches 95% of asymptotic size at 14-16 months post partum. Hence, the size of the medioanterior section of the lower jaw is only dependent on resource availability in utero and the first few months post partum and, as such, potentially leaves a fingerprint of prenatal growth conditions that is evident even in adult individuals. This supports earlier findings in ungulates of a shift in skeletal growth spurts after weaning, and suggests that the choice of skeletal index for population and cohort studies is not trivial.

AB - Increasing evidence suggests that conditions in early life have important consequences for ultimate body size and fitness. Skeletal parts are often used as retrospective indices of body size and growth constraints because of their resistance to seasonal variation in resource availability. Yet, slow-maturing bones are poor predictors of resource limitations during early development, as later benign conditions may lead to compensatory growth. We analysed the temporal growth dynamics of different sections of the lower jaw of roe deer Capreolus capreolus and found that the medioanterior section of the lower jaw reaches 95% of asymptotic size already at 2-4 months post partum, whereas the posterior section reaches 95% of asymptotic size at 14-16 months post partum. Hence, the size of the medioanterior section of the lower jaw is only dependent on resource availability in utero and the first few months post partum and, as such, potentially leaves a fingerprint of prenatal growth conditions that is evident even in adult individuals. This supports earlier findings in ungulates of a shift in skeletal growth spurts after weaning, and suggests that the choice of skeletal index for population and cohort studies is not trivial.

U2 - 10.2981/0909-6396(2006)12[71:EDSOTJ]2.0.CO;2

DO - 10.2981/0909-6396(2006)12[71:EDSOTJ]2.0.CO;2

M3 - Journal article

VL - 12

SP - 71

EP - 76

JO - Wildlife Biology

JF - Wildlife Biology

SN - 0909-6396

IS - 1

ER -