Extra-pair fertilizations and paternity defence in house martins,Delichon urbica

Riley, Helen; Bryant, David M.; Carter, Royston E.; Parkin, David T.

doi:10.1006/anbe.1995.0065

Cited by 47 publications

(21 citation statements)

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“…2009) populations of the species. If EPY occurred in late eggs (Riley et al. 1995), this could lead to an underestimation of paternal genetic effects owing to the counteractive effect of hatching asynchrony.…”

Section: Discussionmentioning

confidence: 99%

“…For example, EPY occurred in early eggs from two independent samples obtained in our population in different years (Krist et al 2005 and this study), while no such effect was found in Polish (Wilk et al 2008) and Hungarian (Rosivall et al 2009) populations of the species. If EPY occurred in late eggs (Riley et al 1995), this could lead to an underestimation of paternal genetic effects owing to the counteractive effect of hatching asynchrony. Thus, the emerging view that the genetic benefits from EPC are small at best (Arnqvist & Kirkpatrick 2005;Akçay & Roughgarden 2007;Edler & Friedl 2008;Schmoll et al 2009;Sardell et al 2011) has no strong support as few previous studies have controlled for the maternal effects within broods.…”

Section: Extra-pair Young and Maternal Effectsmentioning

confidence: 99%

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Superiority of extra-pair offspring: maternal but not genetic effects as revealed by a mixed cross-fostering design

Krist

Munclinger

2011

Molecular Ecology

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Extra-pair copulations (EPC) are the rule rather than an exception in socially monogamous birds, but despite widespread occurrences, the benefits of female infidelity remain elusive. Most attention has been paid to the possibility that females gain genetic benefits from EPC, and fitness comparisons between maternal half-siblings are considered to be a defining test of this hypothesis. Recently, it was shown that these comparisons may be confounded by within-brood maternal effects where one such effect may be the distribution of half-siblings in the laying order. However, this possibility is difficult to study as it would be necessary to detect the egg from which each chick hatched. In this study, we used a new approach for egg-chick assignment and cross-fostered eggs on an individual basis among a set of nests of the collared flycatcher Ficedula albicollis. After hatching, chicks were ascribed to mothers and therefore to individual eggs by molecular genetic methods. Extra-pair young predominated early in the laying order. Under natural conditions, this should give them a competitive advantage over their half-siblings, mediated by hatching asynchrony. However, we experimentally synchronized hatching, and after this treatment, extra-pair young did not outperform within-pair young in any studied trait including survival up to recruitment and several indicators of reproductive success and attractiveness. We obtained only modest sample sizes for the last two traits and did not test for extra-pair success of male offspring. Thus, we cannot exclude the possibility of advantages of extra-pair young during the adult phase of life. However, our data tentatively suggest that the more likely reason for females' EPCs is the insurance against the infertility of a social mate.

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Section: Discussionmentioning

confidence: 99%

Section: Extra-pair Young and Maternal Effectsmentioning

confidence: 99%

Superiority of extra-pair offspring: maternal but not genetic effects as revealed by a mixed cross-fostering design

Krist

Munclinger

2011

Molecular Ecology

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“…For sexual monomorphism in size, the costs of producing sons and daughters in this species are not expected to differ, although observations from other size monomorphic species indicate that this is not necessarily true (Cameron‐MacMillan et al 2006). Males of this species may increase reproductive success by acquiring offspring from extra‐pair matings, and therefore, show higher reproductive potential than females (Riley et al 1995, Whittingham and Lifjeld 1995a,b). Males that gain higher total fertilization success are heavier and survive better than males with lower fertilization success (Whittingham and Lifjeld 1995b).…”

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confidence: 99%

Offspring sex ratio skew in the sexually monomorphic house martin Delichon urbicum

Zielińska¹,

Dubiec²,

Zieliński³

2010

Journal of Avian Biology

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Sex ratio at conception may be under selection pressure, given that male and female offspring differ in the cost of production or generate different fitness returns under specific conditions. We studied adjustments in the primary, secondary and tertiary sex ratio in house martin Delichon urbicum, which is a sexually monomorphic, socially monogamous, colonial bird. Males of this species engage in extra‐pair copulations with heavy males acquiring the highest fertilization success. We analyzed variation in the sex ratio in relation to clutch size and parental characteristics including body condition, wing length, as well as length and pigmentation of the white rump patch during three breeding seasons. The only variable which significantly explained the variation in the sex ratio was wing length of the social father and mother. The proportion of sons among offspring was positively correlated to wing length of the social father and negatively correlated to mother wing length. Social father wing length positively correlated with mean brood body mass at fledging, which may suggest that females that mated with long‐winged males produced sons, which acquired the highest total fertilization success. Consequently, our results indicate that house martin females may adaptively adjust offspring sex composition at egg laying in relation to the characteristics of their social mate.

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“…This assumption is rarely tested, however (Stoleson andBeissinger 1995, Wiebe et al 1998). The relationship between laying and hatching order is relevant to other areas of inquiry, including the evolution of sibli-cide (Mock 1984), pre-hatching communication among nestlings (Davies and Cooke 1983), the allocation of maternal testosterone to eggs (Schwabl 1993) and the relationship between parentage and parental investment (Riley et al 1995).…”

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confidence: 99%

Laying order, hatching asynchrony and nestling body mass in Tree Swallows Tachycineta bicolor

Clotfelter

Whittingham²,

Dunn³

2000

Journal of Avian Biology

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We studied the reproductive biology of a box‐nesting population of Tree Swallows Tachycineta bicolor in southeastern Wisconsin, USA. We were interested particularly in the relationship between laying order and hatching order and the extent to which each was a predictor of nestling body mass. We found that laying order was a significant predictor of hatching order. Laying and hatching order were related to nestling mass at 4 days of age and to a lesser extent at 12 days of age. In addition, we investigated the effects of natural variation in hatching asynchrony. Hatching asynchrony was positively related to the range of nestling body masses within a brood at days 4 and 12. The probability that brood reduction occurred was also positively related to the degree of hatching asynchrony, though this effect was significant only at day 4. Our results suggest that laying order and hatching order have their greatest effects on nestling Tree Swallows early in the nestling period.

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Extra-pair fertilizations and paternity defence in house martins,Delichon urbica

Cited by 47 publications

References 0 publications

Superiority of extra-pair offspring: maternal but not genetic effects as revealed by a mixed cross-fostering design

Superiority of extra-pair offspring: maternal but not genetic effects as revealed by a mixed cross-fostering design

Offspring sex ratio skew in the sexually monomorphic house martin Delichon urbicum

Laying order, hatching asynchrony and nestling body mass in Tree Swallows Tachycineta bicolor

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