Breeding between Tree Swallows from the same brood

Autor:	Denis Lepage, Andrew G. Horn, David J. T. Hussell, Robert W. Shutler, Marty L. Leonard, Dave Shutler
Rok vydání:	2004
Předmět:	Demographics biology Nest Mate choice Ecology Tachycineta bicolor Biological dispersal Zoology Tree (set theory) biology.organism_classification Inbreeding Ecology Evolution Behavior and Systematics Brood
Zdroj:	Journal of Field Ornithology. 75:353-358
ISSN:	1557-9263 0273-8570
DOI:	10.1648/0273-8570-75.4.353
Popis:	We provide data on three instances where Tree Swallows (Tachycineta bicolor) that fledged from the same nest (broodmates) eventually bred together in subsequent years. Two instances were detected in Ontario and a third was detected in Nova Scotia. Based on demographics at the times of each event, we estimated probabilities of these broodmate pairings as approximately 1 in 16,000, 1 in 5600, and 1 in 29,000, respectively, whereas the number of identified pairs in the populations was less than 65 in each case. Thus, inbreeding occurred at a higher frequency than expected by chance. We cannot distinguish whether these identical natal dispersal responses arose from similarity in genes or in rearing environments.
Databáze:	OpenAIRE
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