Selection on personality in a songbird affects maternal hormone levels tuned to 
its effect on timing of reproduction

Groothuis, T. G. G.; Carere, C.; Lipar, J.; Drent, P. J.; Schwabl, Hubert

doi:10.1098/rsbl.2008.0258

Item

ITEM ACTIONSEXPORT

Add to Basket

Local TagsRelease HistoryDetailsSummary

Released

Journal Article

Selection on personality in a songbird affects maternal hormone levels tuned to its effect on timing of reproduction

MPS-Authors

There are no MPG-Authors in the publication available

External Resource

No external resources are shared

Fulltext (restricted access)

There are currently no full texts shared for your IP range.

Fulltext (public)

There are no public fulltexts stored in PuRe

Supplementary Material (public)

There is no public supplementary material available

Citation

Groothuis, T. G. G., Carere, C., Lipar, J., Drent, P. J., & Schwabl, H. (2008). Selection on personality in a songbird affects maternal hormone levels tuned to its effect on timing of reproduction. Biology Letters, 4(5), 465-467. doi:10.1098/rsbl.2008.0258.

Cite as: https://hdl.handle.net/21.11116/0000-0007-12B9-4

Abstract

The increase or decrease in yolk androgens over the laying sequence of a clutch in birds may mitigate or enhance, respectively, the disadvantage of the last-hatched chicks, providing a potentially adaptive tool to adjust brood size to food conditions. This variation may involve a genetic component on which Darwinian selection can act. We found that two lines of a wild bird species selected for bold and shy personalities show, respectively, increased and decreased androgen concentrations over the laying sequence. The line showing the increase laid earlier in the season, when food conditions are normally sufficient to raise the whole brood. The line showing the decrease laid later, when food is normally scarce, which may facilitate brood reduction. The results indicate a correlated response in maternal hormone transfer to genetic selection on personality, which relates to ecological conditions.