Dosidicus gigas the Humboldt squid is a widely distributed and ecologically important predator in the eastern Pacific Ocean, but its mating behaviour is poorly understood. Individuals of this species have undergone a drastic change in size at maturity in the last years. We investigated mating activity of Humboldt squid in the Gulf of California in , , and by quantifying spermatangia deposited in the tissue of the buccal area. In , we encountered the smallest mean mantle length of mature specimens recorded to date in the Gulf of California. In all years, numerous males were encountered that had been mated by other males. Spermatangia in males were deposited on the tissue in similar numbers and in the same location as normally occurs in females the buccal area , suggesting that male-to-male mating behaviour is similar to male-to-female.
To Sex-Starved Squid in the Dark, Either Gender Will Do
Penetrating the mysteries of sex in deep-sea squid | Deep Sea News
Two deep-sea squids in the genus Gonatus mate. They also have developed a variety of complex social and survival behaviors. In a recent paper in Frontiers in Physiology Peter Morse from James Cook University and MBARI biologist Crissy Huffard summarize the variety of sexual and reproductive behaviors in cephalopods and discuss how these behaviors may help the animals survive. In general, shallow-water cephalopods typically grow fast, live for only a year or two, and die soon after spawning. Deep-water cephalopods are more likely to spawn multiple times and live for at least several years. This may help them cope with limited food and the challenges of finding mates. Here are a few of the surprising observations about cephalopod sex that Morse and Huffard describe in their article:.
16 things you probably didn’t know about cephalopod sex
All rights reserved. In the dark abyss of the ocean, animals cannot afford to be choosy. The odds of bumping into another individual are low, and appropriate willing mates are even harder to come by.