A resurgence in reproductive behavior in a previously inactive male orangutan (Pongo pygmaeus abelii)

摘要

AbstractA male orangutan, who had sired one offspring in 1973, displayed no sexual activity over a period of years despite the continuing presence of his mate. Reproductive behavior recurred after (1) relocation to a new environment, (2) an apparent reduction in obesity, and (3) the introduction of a novel female conspecific.