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Titolo:
Lost hotspots and passive female preference: the dynamic process of lek formation in capercaillie Tetrao urogallus
Autore:
Gjerde, I; Wegge, P; Rolstad, J;
Indirizzi:
Norwegian Forest Res Inst, N-5244 Fana, Norway Norwegian Forest Res Inst Fana Norway N-5244 s Inst, N-5244 Fana, Norway Agr Univ Norway, Dept Biol & Nat Conservat, N-1432 As Nlh, Norway Agr UnivNorway As Nlh Norway N-1432 at Conservat, N-1432 As Nlh, Norway Norwegian Forest Res Inst, N-1432 As Nlh, Norway Norwegian Forest Res Inst As Nlh Norway N-1432 st, N-1432 As Nlh, Norway
Titolo Testata:
WILDLIFE BIOLOGY
fascicolo: 4, volume: 6, anno: 2000,
pagine: 291 - 298
SICI:
0909-6396(200012)6:4<291:LHAPFP>2.0.ZU;2-5
Fonte:
ISI
Lingua:
ENG
Soggetto:
MATING SYSTEMS; HABITAT CHARACTERISTICS; SEXUAL SELECTION; WINTER HABITAT; EVOLUTION; GROUSE; ORGANIZATION; DISPERSION; PATTERNS; FOREST;
Keywords:
capercaillie; hotspots; lek formation; spacing; Tetrao urogallus;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
33
Recensione:
Indirizzi per estratti:
Indirizzo: Gjerde, I Norwegian Forest Res Inst, Fanaflaten 4, N-5244 Fana, Norway Norwegian Forest Res Inst Fanaflaten 4 Fana Norway N-5244 orway
Citazione:
I. Gjerde et al., "Lost hotspots and passive female preference: the dynamic process of lek formation in capercaillie Tetrao urogallus", WILDL BIOL, 6(4), 2000, pp. 291-298

Abstract

The evolutionary processes behind the polygynous mating system known as leks are difficult to document. One approach is to study the behaviour that drives the formation of new leks today. Several hypotheses have been put forward to explain the formation of leks, and they can roughly be divided intotwo groups; one which advocates that the males are the driving force and one which argues that the females are the driving force. In this study we use data from a long-term study (1979-1998) of a capercaillie population at Varaldskogen in southeast Norway to develop a model describing how new leks are formed in this species. By using data on spacing pattern and behaviour of radio-marked young and adult birds of both sexes we demonstrate how the situation develops from winter towards mating in spring. Furthermore, we report on a few cases of new leks that have arisen in the area during the 20 years of study. We argue that both female mate choice, male territoriality and male attraction to locations with high densities of females are involved in a dynamic process of lek formation. We present results which indicate that new leks are mainly founded by young birds. Finally, we shaw that whennew leks are formed the spacing patterns of the individuals involved change. This questions the method of using comparisons between the position of female home ranges and established leks to infer how leks are formed.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 14/07/20 alle ore 11:21:15