Näytä suppeat kuvailutiedot

dc.contributor.authorHämäläinen, Anni
dc.date.accessioned2010-06-02T09:45:25Z
dc.date.available2010-06-02T09:45:25Z
dc.date.issued2010
dc.identifier.otheroai:jykdok.linneanet.fi:1130274
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/24064
dc.description.abstractAs a consequence of certain conflicting evolutionary interests of males and females, the sexes have taken on different reproductive roles. In many species, where females invest more in the production of offspring, males compete for the opportunities to reproduce and females attempt to choose the highest quality males to sire their offspring. Males of different species signal their quality in a variety of ways, including physical cues such as color signals or exaggerated secondary sexual characters, behavioral signals and acquisition of a dominance status through aggression towards other males. In the lekking black grouse only a few males manage to copulate and active fighting is required for a male to defend a territory which is a prerequisite for mating. Central territories and various physical signals have previously been associated with male mating success and in this study the connection of these factors to male fighting activity was studied. Fights between males were videotaped and examined in detail to determine the specific components of their fighting behavior. The number of fights engaged in, the total number of opponents fought with, fighting intensity and the winning of fights (characterized by the male turning his back to the opponent after a fight) were recorded from the tapes. These characteristics were examined in relation to the male’s mating success as well as physical measures and parasite counts obtained by capturing the males before the lekking season. Males that fought more often, more intensively and with a higher number of males won their fights more often. Each of the fighting characteristics as well as fight winning predicted mating success reliably. Physical traits, on the other hand, were connected to male age but were not found to relate to fighting behaviors nor to correlate with mating success in these data. Territory position had no direct connection to mating success, but central males spent more time fighting or engaged in a higher number of fights. The results of this study imply that active fighting and dominance combined with age-revealing physical traits reliably signal male quality and may be used by females as mate selection criteria.
dc.format.extent25 sivua
dc.language.isoeng
dc.rightsThis publication is copyrighted. You may download, display and print it for Your own personal use. Commercial use is prohibited.en
dc.rightsJulkaisu on tekijänoikeussäännösten alainen. Teosta voi lukea ja tulostaa henkilökohtaista käyttöä varten. Käyttö kaupallisiin tarkoituksiin on kielletty.fi
dc.subject.otherdominance
dc.subject.otherfemale selection
dc.subject.otherlek
dc.subject.othermale-male competition
dc.titleFighting performance as a predictor of mating success in male black grouse
dc.identifier.urnURN:NBN:fi:jyu-201006021983
dc.type.dcmitypeTexten
dc.type.ontasotPro gradufi
dc.type.ontasotMaster’s thesisen
dc.contributor.tiedekuntaMatemaattis-luonnontieteellinen tiedekuntafi
dc.contributor.tiedekuntaFaculty of Sciencesen
dc.contributor.laitosBio- ja ympäristötieteiden laitosfi
dc.contributor.laitosDepartment of Biological and Environmental Scienceen
dc.contributor.yliopistoUniversity of Jyväskyläen
dc.contributor.yliopistoJyväskylän yliopistofi
dc.contributor.oppiaineEkologia ja evoluutiobiologiafi
dc.contributor.oppiaineEcology and evolutionary biologyen
dc.rights.accesslevelopenAccessfi
dc.contributor.oppiainekoodi4011
dc.subject.ysoteeri
dc.subject.ysokoiraat
dc.subject.ysonaaraat
dc.subject.ysosoidin
dc.subject.ysoreviirit
dc.subject.ysoloiset


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Näytä suppeat kuvailutiedot