Du är här

The cost of reproduction: a new link between current reproductive effort and future reproductive succcess

Publiceringsår: 1996
Språk: Engelska
Sidor: 711-714
Publikation/Tidskrift/Serie: Proceedings of the Royal Society of London. Series B, Biological sciences
Volym: 263
Nummer: 1371
Dokumenttyp: Artikel
Förlag: Royal Society of London

Sammanfattning

Although a negative trade-off between current reproductive effort and future reproductive output has for long been hypothesized and in some cases empirically shown, no mechanism with the potential to mediate such a reproductive cost from one season to another has been demonstrated. Here we suggest such a mechanism: the time and/or energy constraints during moult. We manipulated current reproduction of blue tits (Parus caeruleus) by delaying their breeding attempts. This resulted in reproductive costs both in terms of decreased survival and lower subsequent reproductive success in the form of delayed start of breeding (females) or a smaller clutch (males). We found that delayed birds expended about 15% more energy in thermoregulation during the subsequent winter than did control birds. Thus, more time and/or energy directed to reproduction, may constrain moult which results in the production of feathers with low insulating capacity. These feathers are retained during the following winter and breeding season. Thus, this mechanism has the potential to link reproductive activities in one season to future reproductive success.

Disputation

Nyckelord

  • Biology and Life Sciences

Övriga

Published
Yes
  • ISSN: 0962-8452

Box 117, 221 00 LUND
Telefon 046-222 00 00 (växel)
Telefax 046-222 47 20
lu [at] lu [dot] se

LERU logotype U21 logotype

Fakturaadress: Box 188, 221 00 LUND
Organisationsnummer: 202100-3211
Om webbplatsen