Final answer:
Extra-pair young (EPY) refers to offspring produced by a female animal through mating with a male other than her social mate or partner. This phenomenon is observed in species where individuals form social pairs, but there is still some level of reproductive interaction outside the established pair bond. EPY can provide genetic diversity and is studied in the context of mating systems and reproductive strategies.
Step-by-step explanation:
Definition of Extra-pair young (EPY)
Extra-pair young (EPY) refers to offspring produced by a female animal through mating with a male other than her social mate or partner. This phenomenon is observed in species where individuals form social pairs, but there is still some level of reproductive interaction outside the established pair bond. EPY can provide genetic diversity and is studied in the context of mating systems and reproductive strategies.
Examples and Related Information
For example, in bird species like the common yellowthroat, females may mate with multiple males, resulting in EPY that have genetic variation beyond what would be expected from the social mate. EPY can also help ensure genetic propagation in cases where individuals have limited access to potential mates.