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Titolo:
High levels of extra-pair paternity in an isolated, low-density, island population of tree swallows (Tachycineta bicolor)
Autore:
Conrad, KF; Johnston, PV; Crossman, C; Kempenaers, B; Robertson, RJ; Wheelwright, NT; Boag, T;
Indirizzi:
Queens Univ, Dept Biol, Kingston, ON K7L 3N6, Canada Queens Univ KingstonON Canada K7L 3N6 Biol, Kingston, ON K7L 3N6, Canada Bowdoin Coll, Dept Biol, Brunswick, ME 04011 USA Bowdoin Coll Brunswick ME USA 04011 l, Dept Biol, Brunswick, ME 04011 USA RCMP Forens Lab, Vancouver, BC V5Z 3L7, Canada RCMP Forens Lab Vancouver BC Canada V5Z 3L7 Vancouver, BC V5Z 3L7, Canada Max Planck Soc, Res Ctr Ornithol, Reprod Biol & Behav Grp, D-82305 Seewiesen, Germany Max Planck Soc Seewiesen Germany D-82305 Grp, D-82305 Seewiesen, Germany
Titolo Testata:
MOLECULAR ECOLOGY
fascicolo: 5, volume: 10, anno: 2001,
pagine: 1301 - 1308
SICI:
0962-1083(200105)10:5<1301:HLOEPI>2.0.ZU;2-F
Fonte:
ISI
Lingua:
ENG
Soggetto:
HIRUNDO-RUSTICA; REPRODUCTIVE SUCCESS; FERTILIZATIONS; BIRDS; COPULATIONS; PASSERINE; PARENTAGE; FEMALES; MARKERS; MATE;
Keywords:
islands; mating system; microsatellites; paternity analysis; Tachycineta bicolor; tree swallows;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
38
Recensione:
Indirizzi per estratti:
Indirizzo: Conrad, KF 62 Tallents Crescent, Harpenden AL5 5BS, Herts, England 62 Tallents Crescent Harpenden Herts England AL5 5BS , England
Citazione:
K.F. Conrad et al., "High levels of extra-pair paternity in an isolated, low-density, island population of tree swallows (Tachycineta bicolor)", MOL ECOL, 10(5), 2001, pp. 1301-1308

Abstract

Molecular genetic studies have suggested that apparently nonbreeding males('floaters') may account for a significant proportion of extra-pair paternity (EPP) in avian populations. Attempts to determine the influence of breeding density on EPP are therefore confounded by the presence of a subpopulation of floaters whose numbers are difficult to estimate. To study EPP in atree swallow (Tachycineta bicolor) population with few floaters, we chose a nestbox grid on an island with an excess of available breeding sites and very few floaters. We obtained DNA samples from 13 complete families and performed DNA profiling on them using four microsatellite loci. For comparison, we also obtained a sample of 58 extrapair young (EPY) from a mainland population typed at five microsatellite loci. Paternity assignments among resident males in both populations were made using the microsatellite profilesand a likelihood-based statistical method. Of the 67 island nestlings typed, we found 37 (55%) nestlings from 11 (85%) different nests that were EPY. The proportion of nestlings that were EPY and the proportion of broods containing EPY did not differ significantly between island and mainland populations studied previously. There was no significant difference between island and mainland populations in the proportion of extra-pair paternities assigned among neighbouring resident males. Male breeding density does not appear to affect the ability of female tree swallows to obtain extra-pair fertilizations, at least over the range of densities studied so far. The rate ofEPP has remained remarkably consistent over many years, studies and populations implying an important role of active female choice in determining EPP.

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Documento generato il 14/07/20 alle ore 12:25:35