Academy of Finland
Funding decision
Name Pakanen, Veli-Matti
Organisation OY
Project title Causes and consequences of dispersal to individual fitness and population dynamics
Decision No. 278759
Decision date 10.04.2014
Funding period 01.09.2014 - 31.08.2017
Funding 252 018
WebFOCUS Report
Project description
The project aimed to find out factors affecting dispersal behaviour in different bird populations. The work was conducted using long term data consisting of information about individually marked birds. The main analysis methods included different variations of mixed models and capture-recapture methods. Dispersal between breeding patches was more frequent from small patches and when the patch was close to other patches. Dispersal of juveniles was similar to those of their parents. Furthermore, birds dispersing as juveniles dispersed more likely also as adults compared to those that did not disperse as juveniles. These results suggest that dispersal is somewhat determined by genotypes. Dispersal did not affect adult survival after first breeding in a long distance migrant, the southern dunlin. However, dispersal reduced winter survival of male willow tits, which are resident birds. The costs and benefits of dispersal are seemingly dependent on the life history of the species.