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Titolo:
Age-specific moose (Alces alces) mortality in a predator-free environment:Evidence for senescence in females
Autore:
Ericsson, G; Wallin, K;
Indirizzi:
Swedish Univ Agr Sci, Dept Anim Ecol, SE-90183 Umea, Sweden Swedish Univ Agr Sci Umea Sweden SE-90183 im Ecol, SE-90183 Umea, Sweden Univ Gothenburg, Dept Appl Environm Sci, SE-40530 Gothenburg, Sweden Univ Gothenburg Gothenburg Sweden SE-40530 , SE-40530 Gothenburg, Sweden
Titolo Testata:
ECOSCIENCE
fascicolo: 2, volume: 8, anno: 2001,
pagine: 157 - 163
SICI:
1195-6860(2001)8:2<157:AM(AMI>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
LIFE-HISTORY; NATURAL-POPULATIONS; EVOLUTION; MAMMALS; SEX; CONSERVATION; PATTERNS; DYNAMICS; SURVIVAL; SIZE;
Keywords:
fitness; harvest; life history; mortality; moose; senescence; selection;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
63
Recensione:
Indirizzi per estratti:
Indirizzo: Ericsson, G Univ Wisconsin, Dept Rural Sociol, 1450 Linden Dr, Madison, WI53706 USA Univ Wisconsin 1450 Linden Dr Madison WI USA 53706 I 53706 USA
Citazione:
G. Ericsson e K. Wallin, "Age-specific moose (Alces alces) mortality in a predator-free environment:Evidence for senescence in females", ECOSCIENCE, 8(2), 2001, pp. 157-163

Abstract

We tested whether the ungulate moose (Alces a[ces) showed senescence in survival. Senescence, i.e., a progressive deterioration with age, may be obscured by multiple mortality causes in a wild population. Thus, we followed radio-marked individuals of known age to separate different mortality causesin adult moose. The risk of dying of causes not linked to humans increasedwith age. For females, the increase in natural mortality was first observable after age 10. Tooth wear was significantly related to age Lbr both sexes, but was stronger for males. It suggests that males would experience senescence in survival earlier than females in a non-hunted population The senescence in mortality observed for female moose may be a result of delayed cost of reproduction acting in concert with tooth wear due to a reduced ability to process food. We also found an increase in hunting mortality with agefor both sexes, with males facing a higher risk of dying than females. Theage-related hunting mortality may be ii result of selectivity by the humanpredator, or a change in moose behaviour with age.

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Documento generato il 30/09/20 alle ore 08:52:56