@article{oai:tsukuba.repo.nii.ac.jp:00028039,
 author = {長谷川, 克 and 渡辺, 守 and Hasegawa, Masaru and Arai, Emi and Kojima, Wataru and Kitamura, Wataru and Fujita, Go and Higuchi, Hiroyoshi and Watanabe, Mamoru and Nakamura, Masahiko},
 issue = {2},
 journal = {Ornithological science},
 month = {Dec},
 note = {On average, male birds other than social father sire more than 10% of all offspring. Levels of extra-pair paternity below 5% of offspring are rarely found and are now considered worthy of explanation in monogamous birds. We recorded the lowest levels of paternity loss ever reported in a population of Barn Swallows Hirundo rustica. The levels of extra-pair paternity were below 5% of offspring (7/243 in 2005 and 1/53 in 2006). We discuss our results in relation to the density-dependence of extra-pair paternity.},
 pages = {161--164},
 title = {Low level of extra-pair paternity in a population of the Barn Swallow Hirundo rustica gutturalis},
 volume = {9},
 year = {2010}
}