Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-3102
O'Connor, K D; Marr, A B; Arcese, P; Keller, L F; Jeffery, K J; Bruford, M W (2006). Extra-pair fertilization and effective population size in the song sparrow Melospiza melodia. Journal of Avian Biology, 37(9):572-578.
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The concept of effective population size (N-e) is used widely by conservation and evolutionary biologists as an indicator of the genetic state of populations, but its precision and relation to the census population size is often uncertain. Extra-pair fertilizations have the potential to bias estimates of N-e when they affect the number of breeders or their estimated reproductive success tallied from social pedigrees. We tested if the occurrence of extra-pair fertilizations influenced estimates of N-e in a resident population of song sparrows Melospiza melodia using four years of detailed behavioural and genetic data. Estimates of N-e based on social and genetic data were nearly identical and averaged c. 65% of the census population size over four years, despite that 28% of 471 independent young were sired outside of social pairs. Variance in male reproductive success also did not differ between estimates based on social and genetic data, indicating that extra-pair mating had little effect on the distribution of reproductive success in our study population. Our results show that the genetic assignment will not always be necessary to estimate N-e precisely.
|Item Type:||Journal Article, refereed, original work|
|Communities & Collections:||07 Faculty of Science > Institute of Evolutionary Biology and Environmental Studies|
|DDC:||570 Life sciences; biology|
590 Animals (Zoology)
|Deposited On:||27 Mar 2009 14:03|
|Last Modified:||12 Dec 2012 11:42|
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