Nutritional conditions during key periods of development, when the architecture and modus
operandi of the body become established, are of profound importance in determining the …

Frequency‐dependent (FD) selection is a central process maintaining genetic variation and
mediating evolution of population fitness. FD selection has attracted interest from …

The selection on residual mass (relative to body size) at fledging was investigated in the
Collared Flycatcher Ficedula albicollis and the Great Tit Parus major. Directional selection …

(1) We investigated experimentally whether timing of reproduction is causally involved in the
seasonal decline in reproductive success in the great tit Parus m. major L. This is important …

Seasonal variation in reproductive success and nestling size were studied in a population of
Song Sparrows (Melospiza melodia). I tested whether seasonal variation in reproductive …

A model that explains natal dispersal in resident screech-owls is presented and examined.
The model is based on interactions among hormonal changes, body condition and social …

Using the theoretical framework of phenotypic plasticity, we studied the timing of breeding in
great tits (Parus major), combining proximate questions about its physiological causation …

Complex social life has been characterized as cognitively challenging and recently, social
relationships such as long-term social bonds and alliances have been identified as key …

This study reports an aviary experiment aimed at determining what affects social dominance
in the great tit (Parus major), especially why older birds (adults) in nature normally dominate …

Six species of resident birds were censused in patches of deciduous forest within a
coniferous forest landscape in south central Sweden. Here, the forests have been subjected …