Inbreeding, inbreeding depression, and infidelity in a cooperatively breeding bird. (1st July 2018)
- Record Type:
- Journal Article
- Title:
- Inbreeding, inbreeding depression, and infidelity in a cooperatively breeding bird. (1st July 2018)
- Main Title:
- Inbreeding, inbreeding depression, and infidelity in a cooperatively breeding bird
- Authors:
- Hajduk, Gabriela K.
Cockburn, Andrew
Margraf, Nicolas
Osmond, Helen L.
Walling, Craig A.
Kruuk, Loeske E. B. - Abstract:
- Abstract: Inbreeding depression plays a major role in shaping mating systems: in particular, inbreeding avoidance is often proposed as a mechanism explaining extra‐pair reproduction in socially monogamous species. This suggestion relies on assumptions that are rarely comprehensively tested: that inbreeding depression is present, that higher kinship between social partners increases infidelity, and that infidelity reduces the frequency of inbreeding. Here, we test these assumptions using 26 years of data for a cooperatively breeding, socially monogamous bird with high female infidelity, the superb fairy‐wren ( Malurus cyaneus ). Although inbred individuals were rare (∼6% of offspring), we found evidence of inbreeding depression in nestling mass (but not in fledgling survival). Mother–son social pairings resulted in 100% infidelity, but kinship between a social pair did not otherwise predict female infidelity. Nevertheless, extra‐pair offspring were less likely to be inbred than within‐pair offspring. Finally, the social environment (the number of helpers in a group) did not affect offspring inbreeding coefficients or inbreeding depression levels. In conclusion, despite some agreement with the assumptions that are necessary for inbreeding avoidance to drive infidelity, the apparent scarcity of inbreeding events and the observed levels of inbreeding depression seem insufficient to explain the ubiquitous infidelity in this system, beyond the mother–son mating avoidance.
- Is Part Of:
- Evolution. Volume 72:Number 7(2018)
- Journal:
- Evolution
- Issue:
- Volume 72:Number 7(2018)
- Issue Display:
- Volume 72, Issue 7 (2018)
- Year:
- 2018
- Volume:
- 72
- Issue:
- 7
- Issue Sort Value:
- 2018-0072-0007-0000
- Page Start:
- 1500
- Page End:
- 1514
- Publication Date:
- 2018-07-01
- Subjects:
- Cooperative breeding -- extra‐pair -- inbreeding depression -- inbreeding avoidance -- infidelity
Evolution -- Periodicals
Heredity -- Periodicals
Évolution (Biologie) -- Périodiques
Hérédité -- Périodiques
338.47004094 - Journal URLs:
- http://evol.allenpress.com/evolonline/?request=index-html ↗
http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1558-5646 ↗
http://www.jstor.org/journals/00143820.html ↗
http://www.bioone.org/bioone/?request=get-journals-list&issn=0014-3820 ↗
https://academic.oup.com/evolut ↗
http://onlinelibrary.wiley.com/ ↗
http://firstsearch.oclc.org ↗
http://firstsearch.oclc.org/journal=0014-3820;screen=info;ECOIP ↗ - DOI:
- 10.1111/evo.13496 ↗
- Languages:
- English
- ISSNs:
- 0014-3820
- Deposit Type:
- Legaldeposit
- View Content:
- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library DSC - 3834.000000
British Library DSC - BLDSS-3PM
British Library STI - ELD Digital store - Ingest File:
- 26346.xml