Sexual conflict in twins: Male co-twins reduce fitness of female Soay sheep

Peter Korsten*, Tim Clutton-Brock, Jill G. Pilkington, Josephine M. Pemberton, Loeske E. B. Kruuk

*Awdur cyfatebol y gwaith hwn

Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

29 Dyfyniadau(SciVal)
20 Wedi eu Llwytho i Lawr (Pure)

Crynodeb

Males and females often have different requirements during early development, leading to sex-specific interactions between developing offspring. In polytocous mammals, competition for limited resources in utero may be asymmetrical between the sexes, and androgens produced by male foetuses could have adverse effects on the development of females, with potentially long-lasting consequences. We show here, in an unmanaged population of Soay sheep, that female lambs with a male co-twin have reduced birth weight relative to those with a female co-twin, while there was no such effect in male twins. In addition, females with a male co-twin had lower lifetime breeding success, which appeared to be mainly driven by differences in first-year survival. These results show that sex-specific sibling interactions can have long-term consequences for survival and reproduction, with potentially important implications for optimal sex allocation.

Iaith wreiddiolSaesneg
Tudalennau (o-i)663-666
Nifer y tudalennau4
CyfnodolynBiology Letters
Cyfrol5
Rhif cyhoeddi5
Dyddiad ar-lein cynnar03 Meh 2009
Dynodwyr Gwrthrych Digidol (DOIs)
StatwsCyhoeddwyd - 23 Hyd 2009
Cyhoeddwyd yn allanolIe

Ôl bys

Gweld gwybodaeth am bynciau ymchwil 'Sexual conflict in twins: Male co-twins reduce fitness of female Soay sheep'. Gyda’i gilydd, maen nhw’n ffurfio ôl bys unigryw.

Dyfynnu hyn