Rare insights into intraspecific brood parasitism and apparent quasi每parasitism in black每capped chickadees

作者：Otter; K A; Murray; B W; Holschuh; C I; Fort; K T

来源：Animal Biodiversity and Conservation, 2011.

• Interspecific brood parasitism
• Quasi&ndash
• parasitism
• Black&ndash
• capped chickadees

Genetic analysis of passerine birds often finds evidence of extra每pair copulations within species, but genetic evidence of intraspecific brood parasitism (IBP) and quasi每parasitism (Q每P) are relatively rare. Further, it is even rarer for genetic patterns that might indicate quasi每parasitism (resident male sires offspring through extra每paircopulations, and allows the female to lay these within the male＊s nest) to be coupled with observational evidence of this behavior. In this paper, we report behavioral observations surrounding the nest of black每capped chickadee, one of the few species in which both IBP and Q每P have been detected through a genetic analysis. These were later confirmed to have young genetically mismatched with both attending parents, as well as mismatched with the attending female but sired by the attending male. The behavioral patterns associated with this nest are contrasted with the two previously reported cases of IPB/Q每P in this species, and suggest that rare ＆detection＊ of quasi每parasitism may be explained by converging patterns of extra每pair behavior and the rarer strategy of intraspecific brood parasitism.