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Intra-specific variance in sperm morphometry: A comparison between wild and domesticated Zebra Finches Taeniopygia guttata
Univ Sheffield, Dept Anim & Plant Sci, Sheffield S10 2TN, S Yorkshire, England.
acquarie Univ, Dept Biol Sci, Sydney, NSW 2109, Australia.
La Trobe Univ, Dept Zool, Melbourne, Vic 3086, Australia.
Univ Sheffield, Dept Anim & Plant Sci, Sheffield S10 2TN, S Yorkshire, England.
2012 (English)In: Ibis, ISSN 0019-1019, E-ISSN 1474-919X, Vol. 154, no 3, 480-487 p.Article in journal (Refereed) Published
Abstract [en]

The Zebra Finch Taeniopygia guttata is a model bird species for the experimental study of behavioural and evolutionary concepts in captivity and especially sexual selection. The validity of sexual selection studies of domesticated birds is of long-standing concern as little is known about the influence of domestication on sexually selected traits. Most domesticated Zebra Finch populations are maintained under a strict breeding regime to avoid potential inbreeding. However these breeding regimes may interfere with the processes of sexual selection and influence the evolution of sexually selected traits because they may limit or prohibit active mate choice. Here we investigated the potential impact of a monogamous breeding scheme in a domesticated population in which active mate choice is largely inhibited, on the evolution of sperm morphometry as a sexually selected trait. We compared sperm morphometric traits (total sperm length and length of sperm head, midpiece and flagellum), and the variance thereof, between a domesticated and two wild Zebra Finch populations. Although we found significant differences between the three populations for certain sperm traits (head length, midpiece length), which may be of importance in postcopulatory sexual selection, overall, variance in sperm morphometry did not differ between the domesticated and the wild Zebra Finch populations. Our results validate the use of domesticated Zebra Finches for further studies of postcopulatory sexual selection and sperm competition.

Place, publisher, year, edition, pages
2012. Vol. 154, no 3, 480-487 p.
Keyword [en]
Domestication, Post-copulatory sexual selection, Sperm design, Taeniopygia guttata
National Category
Natural Sciences Ecology
Identifiers
URN: urn:nbn:se:uu:diva-186765DOI: 10.1111/j.1474-919X.2012.01232.xISI: 000310738400006OAI: oai:DiVA.org:uu-186765DiVA: diva2:572908
Available from: 2012-11-29 Created: 2012-11-29 Last updated: 2017-12-07Bibliographically approved

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Immler, Simone

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