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Titolo:
Indirect fitness consequences of mate choice in sticklebacks: offspring ofbrighter males grow slowly but resist parasitic infections
Autore:
Barber, I; Arnott, SA; Braithwaite, VA; Andrew, J; Huntingford, FA;
Indirizzi:
Univ Glasgow, Inst Biomed & Life Sci, Fish Biol Grp, Glasgow G12 8QQ, Lanark, Scotland Univ Glasgow Glasgow Lanark Scotland G12 8QQ ow G12 8QQ, Lanark, Scotland Univ Edinburgh, Inst Cell Anim & Populat Biol, Edinburgh EH9 3JT, Midlothian, Scotland Univ Edinburgh Edinburgh Midlothian Scotland EH9 3JT Midlothian, Scotland
Titolo Testata:
PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES B-BIOLOGICAL SCIENCES
fascicolo: 1462, volume: 268, anno: 2001,
pagine: 71 - 76
SICI:
0962-8452(20010107)268:1462<71:IFCOMC>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Soggetto:
SEXUAL SELECTION; GOOD-GENES; SIZE; COLORATION; PLUMAGE; IMMUNOCOMPETENCE; ORNAMENTATION; INDICATOR; QUALITY; RATES;
Keywords:
sexual selection; Gasterosteus aculeatus; stickleback; parasites; ornamentation; growth;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
46
Recensione:
Indirizzi per estratti:
Indirizzo: Barber, I Univ Wales, Inst Biol Sci, Edward Llwyd Bldg,Penglais Campus, Aberystwyth SY23 3DA, Ceredigion, Wales Univ Wales Edward Llwyd Bldg,PenglaisCampus Aberystwyth Ceredigion Wales SY23 3DA
Citazione:
I. Barber et al., "Indirect fitness consequences of mate choice in sticklebacks: offspring ofbrighter males grow slowly but resist parasitic infections", P ROY SOC B, 268(1462), 2001, pp. 71-76

Abstract

'Good genes' models of sexual selection suggest that elaborate male sexualornaments have evolved as reliable signals of male quality because only males of high genetic viability are able to develop and maintain them. Females benefit from choosing such individuals if quality is heritable. A key prediction is that the offspring of males with elaborate mating displays will perform better than those of less elaborate males, but it has proved difficult to demonstrate such an effect independently of the effects of differences in parental investment. We tested for 'good genes' linked to male ornamentation in the three-spined stickleback Gasterosteus aculeatus using in vitro fertilization to generate maternal half-siblings, which were raised without parental care.. Maternal half-siblings sired by brightly coloured malesgrew less quickly than half-siblings sired by dull males but were more resistant to a controlled disease challenge. Among the offspring that became infected, those with brighter fathers had higher white blood cell counts. This suggests that highly ornamented males confer disease resistance on theiroffspring. The association with reduced growth suggests a mechanism for the maintenance of heritable variation in both disease resistance and male sexual coloration.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 17/01/21 alle ore 16:50:49