
Henrik Smith
Professor

The trade-off between offspring number and quality in the great tit Parus major
Författare
Summary, in English
(1) Trade-offs between brood size and offspring growth and survival were manipulating the size of 221 great tit Parus major L. broods between 1983 (2) Nestling mass, wing length and tarsus length were inversely related to Hatching date also affected nestling growth, but its effect differed between Intrabrood variability in nestling size increased with brood size. (3) Nestling survival was inversely related to brood size. Small nestlings suffered mortality than large ones. The difference in nestling survival rate between categories was too small to equalize their productivity. (4) Fledgling survival to the autumn and to the following breeding season inversely related to brood size; fledglings from reduced broods survived better from control broods, which in turn survived better than fledglings from enlarged This resulted in the most productive category being the control broods. The fledglings increased with their size as nestlings and decreased with their hatching (5) The sex-ratio among independent fledglings was affected by brood size tion; proportionally more males survived in enlarged than in reduced broods. (6) Dispersal distance of juveniles was not affected by brood size, size hatching date, whereas it was affected by sex. The effects of starvation competition on fledgling survival and dispersal
Avdelning/ar
- Centrum för miljö- och klimatvetenskap (CEC)
- Biodiversitet
- Evolutionär ekologi
- Biodiversitet och bevarandevetenskap
- Livshistoria och funktionell ekologi
Publiceringsår
1989
Språk
Engelska
Sidor
383-401
Publikation/Tidskrift/Serie
Journal of Animal Ecology
Volym
58
Dokumenttyp
Artikel i tidskrift
Förlag
Wiley-Blackwell
Ämne
- Ecology
Status
Published
Forskningsgrupp
- Biodiversity and Conservation Science
- Life History and Functional Ecology
ISBN/ISSN/Övrigt
- ISSN: 1365-2656