Journal
JOURNAL OF ANIMAL ECOLOGY
Volume 78, Issue 6, Pages 1216-1225Publisher
WILEY
DOI: 10.1111/j.1365-2656.2009.01597.x
Keywords
dispersal; house sparrow; life expectancy; lifetime reproductive success; mating success
Funding
- Norwegian University of Science and Technology (NTNU)
- Norwegian Research Council
- Storforsk, Strategic University Program (SUP) in Conservation Biology
- Norwegian Directorate for Nature Management
- EU-commission (METABIRD)
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P>1. Dispersal affects many important ecological and evolutionary processes. Still, little is known about the fitness of dispersing individuals. 2. Here, we use data from a long-term study of a house sparrow Passer domesticus metapopulation to compare lifetime reproductive success (LRS) of resident and immigrant individuals, all with known origin. 3. Lifetime production of recruits by immigrant males was much lower than for resident males, because of shorter life span and lower annual mating success. In contrast, lifetime production of recruits did not differ significantly between immigrant and resident females. 4. Over their lifetime, dispersers contributed fewer recruits to the local population than residents. This shows that immigrant house sparrows have different, sex specific, demographic effects on the population dynamics than residents.
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