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Amorous Squid Seeks Partner: Any Sex Will Do
By JAMES GORMAN
Published: September 20, 2011
A five-and-a-half-inch deep-sea squid that lives a solitary life up to half a mile down in the dark waters of the Pacific Ocean is the latest addition to the hundreds of species that are known to engage in same-sex sex.
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Over the years, scientists have added one creature after another to the list, making it clear that although nature may abhor a vacuum, it seems to be fine with just about everything else.
Male squid, for example, pay no attention to the sex of other squid. Understandably so. They live alone in the dark, males and females are hard to tell apart, and only occasionally do squids pass in the night. Far better to risk wasting a few million sperm than to miss out on a chance to reproduce.
This is only one among many sorts of same-sex sexual behavior. In some insect species, males engage in traumatic insemination, which is just what it sounds like, of other males and females alike. Among mammals, bottlenose dolphins and bonobos engage in lots of different kinds of sex. Male dolphins pursue sex with males and females equally, but the females show a preference for males. Bonobos pair off in all the combinations, often.
Laysan albatrosses form long-term female/female pair bonds, but for them the point is raising chicks, not sex. If one female can arrange a quick liaison with a male from another pair, the two females will tend the young. Noah might well have had two female albatrosses on the ark.
But for sheer amazement, the mating behavior of the squid, Octopoteuthis deletron, has to rank near the top. And the same-sex part is the least of it.
For the record, Octopoteuthis is the first among the spineless masses of invertebrates known to mate equally with males and females, Hendrik J.T. Hoving and two colleagues report in their paper, “A shot in the dark: same-sex sexual behavior in a deep-sea squid,” published, lurid title and all, in Proceedings of the Royal Society: Biology Letters. No surprise given its life in the deep.
The way the squid mate is something else. Little is known about the details but it seems that the male ejaculates a packet of sperm at the mating partner, and the packet turns inside out, essentially shooting the sperm contained in a membrane into the flesh of the partner, where they stay embedded until the female (if the shooter has been lucky) is ready to fertilize its eggs. If males are the recipient of these rocket sperm, they are just stuck with them. It is the kind of mating that would make a good video game.
http://www.nytimes.com/2011/09/21/sc...EslvxH6Gk/i4GA
By JAMES GORMAN
Published: September 20, 2011
A five-and-a-half-inch deep-sea squid that lives a solitary life up to half a mile down in the dark waters of the Pacific Ocean is the latest addition to the hundreds of species that are known to engage in same-sex sex.
Enlarge This Image
Get Science News From The New York Times »
Over the years, scientists have added one creature after another to the list, making it clear that although nature may abhor a vacuum, it seems to be fine with just about everything else.
Male squid, for example, pay no attention to the sex of other squid. Understandably so. They live alone in the dark, males and females are hard to tell apart, and only occasionally do squids pass in the night. Far better to risk wasting a few million sperm than to miss out on a chance to reproduce.
This is only one among many sorts of same-sex sexual behavior. In some insect species, males engage in traumatic insemination, which is just what it sounds like, of other males and females alike. Among mammals, bottlenose dolphins and bonobos engage in lots of different kinds of sex. Male dolphins pursue sex with males and females equally, but the females show a preference for males. Bonobos pair off in all the combinations, often.
Laysan albatrosses form long-term female/female pair bonds, but for them the point is raising chicks, not sex. If one female can arrange a quick liaison with a male from another pair, the two females will tend the young. Noah might well have had two female albatrosses on the ark.
But for sheer amazement, the mating behavior of the squid, Octopoteuthis deletron, has to rank near the top. And the same-sex part is the least of it.
For the record, Octopoteuthis is the first among the spineless masses of invertebrates known to mate equally with males and females, Hendrik J.T. Hoving and two colleagues report in their paper, “A shot in the dark: same-sex sexual behavior in a deep-sea squid,” published, lurid title and all, in Proceedings of the Royal Society: Biology Letters. No surprise given its life in the deep.
The way the squid mate is something else. Little is known about the details but it seems that the male ejaculates a packet of sperm at the mating partner, and the packet turns inside out, essentially shooting the sperm contained in a membrane into the flesh of the partner, where they stay embedded until the female (if the shooter has been lucky) is ready to fertilize its eggs. If males are the recipient of these rocket sperm, they are just stuck with them. It is the kind of mating that would make a good video game.
http://www.nytimes.com/2011/09/21/sc...EslvxH6Gk/i4GA
