search results matching tag: cephalopod

» channel: learn

go advanced with your query
Search took 0.000 seconds

    Videos (24)     Sift Talk (0)     Blogs (1)     Comments (30)   

Squid changing color - not just for octopuses!

newtboy says...

What do they mean “ Recently, scientists in Japan were surprised to find a species of oval squid raised in captivity could change its coat, depending on whether its tank was clean or covered in algae.”…are they students, because I saw this described and demonstrated in 88 in my marine biology class in Hawaii….then we dissected it….then we cooked and ate it as a class. Interesting teacher.

Absolutely not the first time they’ve been “caught” doing this…maybe the first time with high definition cameras, in one specific laboratory condition, with that specific species, raised in captivity, but this is every day behavior for many cephalopods, including squid, and absolutely not a new discovery.

Let’s see them decipher the intense flashings, strobing, color waves, slow fades, etc that they use to communicate and hunt. That might be a first….but I doubt it. Others have studied their insane chromatophores and their amazingly mailable mantles and how they use them for decades if not longer.

This is a neat bit of biology, but to pretend they just discovered this is outrageously dishonest. Get real, people knew squid camouflaged themselves amazingly well long before that guy named Jesus was fathered by a forced pedophilic inception. Almost like saying scientists just discovered newts like it moist, or that water is wet.

Never allow tentacles near an orifice

Octopus Plays With Coconut

grinter says...

Thanks for the article. It kinda reads like an add for Jennifer Mathers' 'octopuses are smart' book. Her 2008 Consciousness and Cognition paper does a better job at laying out the most cephalopod behaviors impressive behaviors:
http://www.sciencedirect.com/science/article/pii/S1053810006001504
. Don't get me wrong; I think cephaolopods totally awesome, but I don't see the case for them being cognitive leaps and bounds above other invertebrates. The behaviors that they are capable of are found elsewhere among inverts, yet people (often encouraged by Mathers or her coauthors on that book) seem to imply they are basically eight armed dogs of the sea:

Behavioral conditioning in the lab (which Mathers likes to call "learning") - Bees, butterflies
Moving objects to close off burrows - mantis shrimp
Carrying objects as temporary refuges - crabs
Individual recognition - wasps, lobsters?, mantis shrimp.
Complex spatial navigation - ants, bees.
Learning via observation - I'm not aware of other inverts that do this, but the cephalopod evidence is also pretty weak.

Maybe there are some more recent, and more convincing results?

Octopus Plays With Coconut

grinter says...

returning* to his evolutionary roots, eh?

..also, why is everyone (or maybe just people who produce pop science content) obsessed with octopus intelligence? Like many cool things that octopus do, this is complex behavior.. but likely innate, and not a sign of intelligence.


*Dear inevitable trolls: I do not mean to imply that cephalopods evolved from bivalves, only that they had a molluscan ancestor with an external shell.

chingalera said:

Maybe he was raised by a family of bivalve mollusks??
Hehehe, a clam adoption agency in ⓢⓟⓞⓝⓖⓔⓑⓞⓑ universe

Snowden Scolds US Policy

poolcleaner says...

You and Iron Man can go fuck yourselves. Civil War! jk, I just like science fiction. I get it, SHIELD is just doing its job and they can't tell us the real reasons why.

The Rising Tide is evil and sounds a lot like a Hydra conspiracy. Cthulhu = cephalopod = rising out of the ocean = cephalopod = Hydra

Snowden works for Hydra! Or is he a double agent?

VoodooV said:

Yeah you don't get to ignore a trial simply because you don't think it will be fair. Every criminal ever would be justified in fleeing the law in such a case.

I noticed you didn't answer my question.

We don't abide fleeing the law in any other situation, How come this is different?

We don't live in a country where we pick and choose the laws we want to follow.

Besides, turning himself in is win win. Snowden is virtually guaranteed that he will only die of old age because if anything happens to him, the US will be blamed.

His case is stronger if he turns himself in and argues his case. Fleeing hurts him.

Also, I hate to break it to you. Snowden's fleeing didn't create the public outcry you expected. The jury is in on this. Thanks to GPS and smartphones and other apps that use personal information. The public really doesn't have a lot of problem with being eavesdropped on. Most people already knew it was happening Congratulations, you created numerous internet memes but no actual change.

Attitudes on privacy are changing. Sorry you didn't get the memo.

Millionaire's house has 165 foot aquarium fence

Bill Maher Discusses Boston Bombing and Islam

hpqp says...

@SDGundamX

I cannot agree with that definition. The problem I have with the concept of "Islamophobia" is as I've stated above: it conflates the individuals and the ideology, thus causing those who use the term to be guilty of the error they are often accusing their opponents of. And that conflation lets it be used - by Islamists as well as by self-righteous (or ill-placed-guilt-ridden) lefties - to silence criticism of Islam. This term has been particularly abused in this manner in Europe, where the ghost of the Holocaust weighs a lot heavier on politicians and the media than it does in the US.

"Muslimphobia" may not roll of the tongue quite as nicely, but it would at least be a more honest and acceptable term to denote the irrational fear/hatred of Muslim people. Mostly, what people refer to as "Islamophobia" is a combination of religious discrimination, xenophobia and racism, and we should not be afraid to use those meaningful terms in our criticism of such discriminatory behaviour. It may even help to break it down in that way, instead of trying to wrap it up in a simplistic and ambivalent term.

There is another big problem with "Islamophobia" which I have already discussed here: http://videosift.com/talk/Dare-we-criticize-Islam, (the difference to be made between what one is and what one believes).

As for Harris' unfortunate and highly irrational/illogical defense of racial profiling, the Cephalopod Prof says it better than I can (as he often does).

edit: ach, how can I be such a cad and forget to thank you for the kudos? I still have much to learn, but thank you for taking note of my reduced antagonisation, knee-jerk reactions and general verbal belligerance.

Octopus Houdini Escapes

poolcleaner says...

I believe you have your terminology mixed up. In this case the word woman, or womon or women or waman or wamen or wamon or weman or wemon or wemen or succubus hive queen ticking time bomb baby popper dumpster dumper, is pronounced "cow". In a sentence: "Your wife can't fit into her wedding dress because she's a cow."

You're worried about a cow when they're forcing a cephalopod out a hole the size of a cat? Size of a cat probably sounds familiar. Does it feel that way? The size of the hole.

Sorry, am I wrong? I get some mammals confused. Hairy, fat, overly sensitive chew toys, right?

VILE +9000

mindbrain said:

YA THE PART WHEN HE MAKE-A DA HAHA AT THE WOMONS? AND. AND. THE JOKE IS BE ON THE WOMON. HUhHUhHUhH-you're vile. +1

Where's the Octopus?

Cuttlefish Fights For Spawning Rights

Ron Swanson on Vegan Bacon

oritteropo says...

(waves white flag) OK, I surrender. Jules Verne trumps Andrew Stanton, you win this round @EvilDeathBee
>> ^EvilDeathBee:

>> ^oritteropo:
Because cephalopods are friends, not food?
>> ^Sagemind:
My local store had something like this a few weeks ago.
Vegan squid. and it has absolutely no real meat in it what-so-ever!~ They were so proud of their product. All I could think of was "Then, why would I want to eat it?"


Tell that to Captain Nemo

Ron Swanson on Vegan Bacon

EvilDeathBee says...

>> ^oritteropo:

Because cephalopods are friends, not food?
>> ^Sagemind:
My local store had something like this a few weeks ago.
Vegan squid. and it has absolutely no real meat in it what-so-ever!~ They were so proud of their product. All I could think of was "Then, why would I want to eat it?"



Tell that to Captain Nemo

Ron Swanson on Vegan Bacon

oritteropo says...

Because cephalopods are friends, not food?
>> ^Sagemind:

My local store had something like this a few weeks ago.
Vegan squid. and it has absolutely no real meat in it what-so-ever!~ They were so proud of their product. All I could think of was "Then, why would I want to eat it?"

Why we Have Blind Spots - and How To See Blood Vessels

TheGenk says...

>> ^shinyblurry:

It's more logical if you want them to be blind. The reason it is designed that way is because of UV light..water blocks it out, air doesn't..the blood vessels are in front to block out the UV light..otherwise you would be blind in a few days.
>> ^TheGenk:
Interesting, I always thought the cells were arranged like the cephalopods since it's more logical.
Got to keep that in mind when I create my army of genetically engineered superhumans to take over the world.



Since I'm an intelligent designer, I would just put a UV filter on the cornea, therefor solving this problem and increasing their ability to see in low light situations a little in one go.

Why we Have Blind Spots - and How To See Blood Vessels

shinyblurry says...

It's more logical if you want them to be blind. The reason it is designed that way is because of UV light..water blocks it out, air doesn't..the blood vessels are in front to block out the UV light..otherwise you would be blind in a few days.

>> ^TheGenk:
Interesting, I always thought the cells were arranged like the cephalopods since it's more logical.
Got to keep that in mind when I create my army of genetically engineered superhumans to take over the world.



Send this Article to a Friend



Separate multiple emails with a comma (,); limit 5 recipients






Your email has been sent successfully!

Manage this Video in Your Playlists

Beggar's Canyon