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Journal of Ornithology
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Journal of Ornithology
Article . 2015 . Peer-reviewed
License: Springer TDM
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Postcopulatory sexual selection favors fertilization success of restocking hybrid quails over native Common quails (Coturnix coturnix)

Authors: Sánchez Donoso, Inés; Morales-Rodríguez, Pablo Antonio; Puigcerver Oliván, Manuel; Caballero de la Calle, José Ramón; Vilà i Arbonès, Carles; Rodríguez Teijeiro, José Domingo;

Postcopulatory sexual selection favors fertilization success of restocking hybrid quails over native Common quails (Coturnix coturnix)

Abstract

[GER]In vielen Arten spielt die postkopulative sexuelle Selektion für den Fortpflanzungserfolg von Männchen eine große Rolle. Unterschiede im Befruchtungserfolg können Einfluss haben auf die Rate der genetische Introgression und Vermischung zwischen verschiedenen Abstammungslinien. Um Unterschiede in der Spermienwettbewerbsstärke zwischen wilden Wachteln (Coturnix coturnix) und Japanischen Wirtschaftswachtelaus stammenden Hybridwachteln (C. coturnix × C. japonica), die für die Aufstockung von Beständen zur Jagd genutzt wurden, zu untersuchen, haben wir Verpaarungen in der Gefangenschaft durchgeführt. Es wird vermutet, dass solche zwischenartlichen Verpaarungen unter natürlichen Bedingungen ein Risiko für den Erhalt des Artbestandes von Wachteln darstellen. Unsere Ergebnisse zeigten, dass der Fortpflanzungserfolg eines Männchen davon beeinflusst wurde (1) wie viel Zeit es mit dem Weibchen verbrachte, (2) ob bereits Spermien eines anderen Männchen im Ovidukt waren, (3) wie lange ein vorheriger Partner mit dem Weibchen kopuliert hatte, und vor allem (4) welchen genetischen Hintergrund das Männchen (Wildtier oder Wirtschaftswachtel) hatte. Hybride Wirtschaftswachteln hatten den höchsten Fortpflanzungserfolg und befruchteten die gleiche Anzahl Eier eines Weibchens schneller. Wenn bereits Spermien eines anderen Männchens im Ovidukt waren, verringerte dies den prozentualen Anteil erfolgreicher Befruchtungen des nächsten Männchen. Dieser Effekt war am stärksten für wilde Männchen, wenn der vorherige Partner eine Wirtschaftswachtel war. Zusammenfassend lässt sich sagen, dass Spermien von Hybridmännchen wettbewerbsstärker zu sein scheinen als Spermien frei lebender Wachteln. Dies mag die Introgression der Allele von Japanischen Wirtschaftswachteln in die Wildpopulation unterstützen und eine ernste Bedrohung für den Erhalt wilder Wachtelpopulationen darstellen.

Postcopulatory sexual selection plays an important role in the reproductive success of males in many species. Differences in fertilization success could affect rates of admixture and genetic introgression between divergent lineages. We investigated sperm precedence in matings in captivity involving Common quails (Coturnix coturnix) and farm quails of hybrid origin (C. coturnix × domestic Japanese quail, C. japonica), the last used in restocking practices to increase hunting bags. These inter-specific matings in natural conditions are claimed to represent an important threat to the conservation of native Common quail populations. Results showed that fertilization success of each male depended on (1) the time it spent with the female, (2) the presence of sperm from a previous male in the female oviduct, (3) the time that the previous partner had been copulating with the female, and, most importantly, (4) the genetic origin of the male (wild or farm). Farm hybrid males showed higher fertilization success than wild Common males, and they required less time with the female to fertilize the same proportion of eggs. The presence of sperm from another male in the female oviduct reduced the percentage of fertilized eggs by a male. However, this reduction was higher for wild males when the precedent mate was a farm male. In summary, the sperm of farm hybrid males may outcompete the sperm of native males and this could be favoring the introgression of domestic Japanese alleles into the Common quail population, thus constituting a severe conservation threat to wild Common quail populations.

Peer reviewed

Country
Spain
Keywords

Restocking, Ocells, Introgression, Reproduction, Criptic female choice, Coturnix, Quail, Birds, Reproducció, Postcopulatory selection

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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