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This is from an article in the recent edition of New Scientist:
Web: http://www.newscientist.com/article.ns?id=dn8462
Web: http://www.newscientist.com/article.ns?id=dn8462
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Broody squid carry their eggs in their arms
- Thread starter dub_doctor
- Start date
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- Jul 11, 2005
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- 378
Doh! I was racing onto the boards to post this from the BBC website
BBC NEWS | Science/Nature | First images of baby squid care
But Dub Doctor beat me to it.
It's facinating stuff!
BBC NEWS | Science/Nature | First images of baby squid care
But Dub Doctor beat me to it.
It's facinating stuff!
- Joined
- Feb 5, 2003
- Messages
- 373
Wow! The videos from the New Scientist are absolutely fabulous! What an incredible discovery. This is certainly the age of the cephalopod!
Cheers!
Cheers!
- Joined
- Sep 5, 2003
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- 1,967
CapnNemo said:Doh! I was racing onto the boards to post this from the BBC website
BBC NEWS | Science/Nature | First images of baby squid care
But Dub Doctor beat me to it.
It's facinating stuff!
Yeah? I was busy trying to write a little summary of the article from Nature, along with stolen pictures and video.
dub-doctor gets his revenge...
Gonatus madokai also broods eggs
Passed to us from John Bower - Hokkaido University
A new study led by a group of Japanese scientists has identified a squid in northern Japan that broods its eggs
Parental care of eggs or young is uncommon in invertebrates. This is true for most squids, but a new study published in The Biological Bulletin (www.biolbull.org/content/current; pages 259-262) shows that females of a species in northern Japan care for their spawned eggs by brooding them in their arms. Divers in northern Japan have observed this behavior annually in nearshore waters off the Shiretoko Peninsula since 1991, but the species has until now remained unidentified.
The cover photo (www.biolbull.org/content/223/3.cover-expansion), taken off Rausu, Hokkaido, in May 2006 shows a female brooding a single-layer, sheet-like egg mass attached to its arm hooks. The small, oval eggs are visible within the dark, viscous material that formed the egg mass. The authors describe the brooding behavior and identify the species as Gonatus madokai (family Gonatidae), now the third squid species known to brood. They suggest that females might continue this behavior for several months, during which time they weaken, undergo gelatinous degeneration, and are presumably unable to feed.
Why the females would devote so much time and energy to caring for the eggs remains a mystery, but brooding could increase offspring fitness by protecting the developing embryos from egg predators and hypoxia. Even less is known about the evolutionary origin of this behavior, but the authors suggest that more brooding squids await discovery in the deep sea, which could provide more clues to understanding this intriguing behavior.
Passed to us from John Bower - Hokkaido University
A new study led by a group of Japanese scientists has identified a squid in northern Japan that broods its eggs
Parental care of eggs or young is uncommon in invertebrates. This is true for most squids, but a new study published in The Biological Bulletin (www.biolbull.org/content/current; pages 259-262) shows that females of a species in northern Japan care for their spawned eggs by brooding them in their arms. Divers in northern Japan have observed this behavior annually in nearshore waters off the Shiretoko Peninsula since 1991, but the species has until now remained unidentified.
The cover photo (www.biolbull.org/content/223/3.cover-expansion), taken off Rausu, Hokkaido, in May 2006 shows a female brooding a single-layer, sheet-like egg mass attached to its arm hooks. The small, oval eggs are visible within the dark, viscous material that formed the egg mass. The authors describe the brooding behavior and identify the species as Gonatus madokai (family Gonatidae), now the third squid species known to brood. They suggest that females might continue this behavior for several months, during which time they weaken, undergo gelatinous degeneration, and are presumably unable to feed.
Why the females would devote so much time and energy to caring for the eggs remains a mystery, but brooding could increase offspring fitness by protecting the developing embryos from egg predators and hypoxia. Even less is known about the evolutionary origin of this behavior, but the authors suggest that more brooding squids await discovery in the deep sea, which could provide more clues to understanding this intriguing behavior.
- Joined
- Nov 19, 2002
- Messages
- 2,107
From Kat's Western Flyer Expedition
OK, it's official. I'm stowing away on this ship and never leaving. This morning we saw a brooding Gonatus at 1600m, waving her inky egg sheet gently as she floated along. We got a very good look at her and were even able to zoom in on the eggs--we could see eye spots! These images are screen grabs from my little video camera, which was filming the live feed on screen, so they're not great quality, but you'll get the idea!
See full expedition posts and photos here
OK, it's official. I'm stowing away on this ship and never leaving. This morning we saw a brooding Gonatus at 1600m, waving her inky egg sheet gently as she floated along. We got a very good look at her and were even able to zoom in on the eggs--we could see eye spots! These images are screen grabs from my little video camera, which was filming the live feed on screen, so they're not great quality, but you'll get the idea!
See full expedition posts and photos here
Attachments
Video of gonatid haching
More brooding Gonatus. A nice piece from Science Friday on Gonatus onyx for squid week 2016 (images from 2002). This goes full circle in the thread as it was started from the original publication by Brad Seibel in Nature in 2005 (but observed in 2002).
The Rare Sight Of A Brooding Squid
The Rare Sight Of A Brooding Squid
So many good things came out of ceph week this year. I admit, I've seen both those photo's, but I don't think I've ever seen then with such clear resolution! Gonatus is really a stunning animal in its natural habitat.
Their ceph week was mostly rehash but done really well and included a few things I had not seen before.
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