Latest Hermaphrodite Stories
Researchers at the Stanford University School of Medicine have discovered that males of the laboratory roundworm secrete signaling molecules that significantly shorten the lifespan of the opposite sex.
A report published Aug. 22 in the open access journal PLOS ONE states that, despite the nature of their mating being very traumatic and biologically costly, the female sea slug will mate more often than required to in order to reproduce.
The world athletics governing body is reported seeking a way to deal with runner Caster Semenya, who allegedly has both male and female sexual organs. Semenya is an 18-year-old South African athlete, a woman with a muscular build, who blew away the field in winning the women's 800-meters gold medal at the World Athletics Championships in Berlin last month.
Researchers studying the nervous control of nematode mating behavior have produced video footage of a male worm preparing to mate with a hermaphrodite.
Most animals, like humans, have separate sexes â€” they are born, live out their lives and reproduce as one sex or the other. However, some animals live as one sex in part of their lifetime and then switch to the other sex, a phenomenon called sequential hermaphroditism.
By Womack, Kenneth Mallory-Kani, Amy As parables
By directly manipulating mating performance in a tropical sea slug, Chelidonura hirundinina, researchers of the University of TÃ¼bingen have now shed light on the bizarre reproductive conflicts encountered by hermaphroditic animals. In some hermaphroditic species, such as C. hirundinina, mating partners may insist on copulating as a "male," "female," or both, resulting in unique biological conflicts over gender.
- A pivoted catch designed to fall into a notch on a ratchet wheel so as to allow movement in only one direction (e.g. on a windlass or in a clock mechanism), or alternatively to move the wheel in one direction.