Continuous breeders are animal species that can breed or mate throughout the year. This includes humans and apes (chimpanzees, gorillas, orangutans, and gibbons), who can have a child at any time of year. In continuous breeders, females are sexually receptive during estrus, at which time ovarian follicles are maturing and ovulation can occur. Evidence of ovulation, the phase during which conception is most probable, is advertised to males among many non-human primates via swelling and redness of the genitalia.
In the 1960s, Ivan Goodbody researched three species of tropical ascidian and two species of crustacean, including the Puerto Rican sand crab, in Jamaica and determined them to be continuous breeders.
Attribution
This article incorporates text by Dr Joe Kiff available under the license.