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Alpine ibex males grow large horns at no survival cost for most of their lifetime

Oecologia, 2013-12, Vol.173 (4), p.1261-1269 [Peer Reviewed Journal]

Springer-Verlag Berlin Heidelberg 2013 ;2015 INIST-CNRS ;COPYRIGHT 2013 Springer ;Distributed under a Creative Commons Attribution 4.0 International License ;ISSN: 0029-8549 ;EISSN: 1432-1939 ;DOI: 10.1007/s00442-013-2700-1 ;PMID: 23774947 ;CODEN: OECOBX

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Title:
Alpine ibex males grow large horns at no survival cost for most of their lifetime
Author: Toïgo, Carole ; Gaillard, Jean-Michel ; Loison, Anne
Subjects: Age ; Aging ; Animal and plant ecology ; Animal horns ; Animal, plant and microbial ecology ; Animals ; Biological and medical sciences ; Biomedical and Life Sciences ; Capra ibex ibex ; Deer ; Ecological life histories ; Ecology ; Economic aspects ; Evolution ; France ; Fundamental and applied biological sciences. Psychology ; General aspects ; Goats - physiology ; Horns - growth & development ; Hydrology/Water Resources ; Life Sciences ; Male ; Male animals ; Mating behavior ; Mortality ; Physiological aspects ; Plant Sciences ; POPULATION ECOLOGY ; Population ecology - Original research ; Reproduction - physiology ; Sexual selection ; Sheep ; Weapons
Is Part Of: Oecologia, 2013-12, Vol.173 (4), p.1261-1269
Description: Large horns or antlers require a high energy allocation to produce and carry both physiological and social reproductive costs. Following the principle of energy allocation that implies trade-offs among fitness components, growing large weapons early in life should thus reduce future growth and survival. Evidence for such costs is ambiguous, however, partly because individual hetero-geneity can counterbalance trade-offs. Individuals with larger horns or antlers may be of better quality and thus have a greater capacity to survive. We investigated trade-offs between male early horn growth and future horn growth, baseline mortality, onset of actuarial senescence, and rate of ageing in an Alpine ibex (Capra ibex ibex) population. Horn growth of males in early life was positively correlated to their horn length throughout their entire life. Cohort variation and individual heterogeneity both accounted for among-individual variation in horn length, suggesting both long-lasting effects of early life conditions and individual-specific horn growth trajectories. Early horn growth did not influence annual survival until 12 years of age, indicating that males do not invest in horn growth at survival costs over most of their lifetime. However, males with fast-growing horns early in life tended to have lower survival at very old ages. Individual heterogeneity, along with the particular life-history tactic of male ibex (weak participation to the rut until an old age after which they burn out in high mating investment), are likely to explain why the expected trade-off between horn growth and survival does not show up, at least until very old ages.
Publisher: Berlin/Heidelberg: Springer
Language: English
Identifier: ISSN: 0029-8549
EISSN: 1432-1939
DOI: 10.1007/s00442-013-2700-1
PMID: 23774947
CODEN: OECOBX
Source: MEDLINE
Alma/SFX Local Collection
ProQuest Central

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Alpine ibex males grow large horns at no survival cost for most of their lifetime

Springer-Verlag Berlin Heidelberg 2013 ;2015 INIST-CNRS ;COPYRIGHT 2013 Springer ;Distributed under a Creative Commons Attribution 4.0 International License ;ISSN: 0029-8549 ;EISSN: 1432-1939 ;DOI: 10.1007/s00442-013-2700-1 ;PMID: 23774947 ;CODEN: OECOBX

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