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Titolo:
SEXUAL SELECTIONS EFFECTS ON MALE LIFE-HISTORY AND THE PATTERN OF MALE MORTALITY
Autore:
CLINTON WL; LEBOEUF BJ;
Indirizzi:
5844 NE 75TH ST SEATTLE WA 98115 UNIV CALIF SANTA CRUZ,DEPT BIOL SANTA CRUZ CA 95064
Titolo Testata:
Ecology
fascicolo: 6, volume: 74, anno: 1993,
pagine: 1884 - 1892
SICI:
0012-9658(1993)74:6<1884:SSEOML>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Soggetto:
NORTHERN ELEPHANT SEALS; EVOLUTION; COSTS; REPRODUCTION; DEMOGRAPHY; MAMMALS; GROUSE; AGE;
Keywords:
COST OF REPRODUCTION; DEMOGRAPHY; FUTURE SURVIVAL VS MATING SUCCESS; LIFE HISTORY; MALE LIFE TABLE; MALE MORTALITY; PINNIPEDS; MIROUNGA-ANGUSTIROSTRIS; NORTHERN ELEPHANT SEAL; SEX DIFFERENCES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
52
Recensione:
Indirizzi per estratti:
Citazione:
W.L. Clinton e B.J. Leboeuf, "SEXUAL SELECTIONS EFFECTS ON MALE LIFE-HISTORY AND THE PATTERN OF MALE MORTALITY", Ecology, 74(6), 1993, pp. 1884-1892

Abstract

Modifications of male life history due to sexual selection should be apparent in polygynous species such as elephant seals, in which sexualselection has produced a high degree of sexual dimorphism. In theory,male traits that confer a mating advantage bear survival disadvantages. The aim of this study was to examine the relationship between sexual selection and life history patterns in male northern elephant seals,Mirounga angustirostris. A life table, with age-specific estimates ofmortality and reproduction, was constructed for male elephant seals from resighting data of tagged seals. Increased age-specific mortality was associated with the period of first reproduction by males, which occurred from 6-10 yr of age. A negative relationship was found betweenmating success and future survival in males that were beginning to breed. Older males showed no phenotypic costs to reproduction, and a positive, but not significant, relationship was shown between current mating success and future survival and mating success.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/09/20 alle ore 13:41:21