You heard me correctly. Dolphin vaginas. Brennan is well-known among biologists for her work on sexual conflict in ducksand on the internet for her high-speed videos of duck erection.
Complex foldings of the vaginal wall are unique to some cetaceans and artiodactyls and are of unknown function s. The patterns of vaginal length and cumulative vaginal fold length were assessed in relation to body length and to each other in a phylogenetic context to derive insights into functionality. The reproductive tracts of 59 female cetaceans 20 species, 6 families were dissected.
Dolphin is a common name of aquatic mammals within the infraorder Cetacea. The term dolphin usually refers to the extant families Delphinidae the oceanic dolphinsPlatanistidae the Indian river dolphinsIniidae the New World river dolphinsand Pontoporiidae the brackish dolphinsand the extinct Lipotidae baiji or Chinese river dolphin. There are 40 extant species named as dolphins.
All rights reserved. An image reconstructed from CT scans showing how the penis of the common bottlenose dolphin red fits within the intricate folds and turns of a bottlenose dolphin vagina. Thanks to a pressurized penis inflator and genitals flown in from across the U.
In the past, the predominant theory was that humans were the only animals who have sex for pleasure, and that others merely copulated to reproduce. That mindset is now changing and scientists presenting their work on Saturday at the Experimental Biology meeting add an important, stimulating female perspective. This, say the Mount Holyoke College scientists, suggests that sex is pleasurable for dolphins and facilitates social bonding.
Female bottlenose dolphins have evolved to the point where they are able to protect themselves from fertilisation by some males. Certain species of marine animals have extensive vaginal folds that make penis entry more difficult, effectively acting as a reproductive barrier, researchers have found. Male bottlenose dolphins form strong bonds with two to four others to fend off competitors for their females.
But whale and dolphin penises are a lot tougher—quite literally. Orbach, a postdoctoral fellow at Dalhousie University and research associate at Mount Holyoke College, had the vaginas ready. Then they brought on Kelly for her penile inflation expertise.
By Lauren Tousignant. October 12, am Updated June 15, pm. Their findings were published in Proceedings of the Royal Society. Scientists have long had trouble figuring out how dolphins — or cetaceans in general — get it on.
A: Copulation is the most direct possible interaction between males and females, but we know so little about it largely due to the physical challenges of studying it, especially with underwater creatures. We do this by looking at tissue samples from animals that died of natural causes. We use whole penises and whole vaginas.
An in-depth study of the dolphin clitoris has revealed that these marine creatures may belong to a small group of animals that are known to experience sexual pleasure. Dolphins are known to have sex throughout the year, even at times when they are not capable of conceiving. In other animals that do this, including humans, sex can be pleasurable for females due in large part to clitoral stimulation. This led a team of scientists to investigate the genital anatomy of dolphins to determine what enjoyment — if any — the females were getting out of year-round sex.