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Translator: Joseph Geni Reviewer: Morton Bast
The Kraken, a beast so terrifying
it was said to devour men and ships and whales,
and so enormous it could be mistaken for an island.
In assessing the merits of such tales,
it's probably wise to keep in mind that old sailor's saw
that the only difference between a fairytale and a sea story
is a fairytale begins, "Once upon a time,"
and a sea story begins, "This ain't no shit." (Laughter)
Every fish that gets away
grows with every telling of the tale.
Nevertheless, there are giants in the ocean,
and we now have video proof,
as those of you that saw the Discovery Channel documentary are no doubt aware.
I was one of the three scientists on this expedition
that took place last summer off Japan.
I'm the short one.
The other two are Dr. Tsunemi Kubodera and Dr. Steve O'Shea.
I owe my participation in this now-historic event
to TED.
In 2010, there was a TED event called Mission Blue
held aboard the Lindblad Explorer in the Galapagos
as part of the fulfillment of Sylvia Earle's TED wish.
I spoke about a new way of exploring the ocean,
one that focuses on attracting animals instead of scaring them away.
Mike deGruy was also invited,
and he spoke with great passion about his love of the ocean,
and he also talked to me about applying my approach
to something he's been involved with for a very long time,
which is the hunt for the giant squid.
It was Mike that got me invited to the squid summit,
a gathering of squid experts at the Discovery Channel
that summer during Shark Week. (Laughter)
I gave a talk on unobtrusive viewing
and optical luring of deep sea squid
in which I emphasized the importance
of using quiet, unobtrusive platforms for exploration.
This came out of hundreds of dives I have made,
farting around in the dark
using these platforms,
and my impression that I saw more animals
working from the submersible
than I did with either of the remote-operated vehicles.
But that could just be because the submersible has a wider field of view.
But I also felt like I saw more animals
working with the Tiburon than the Ventana,
two vehicles with the same field of view
but different propulsion systems.
So my suspicion was that it might have something to do with the amount of noise they make.
So I set up a hydrophone on the bottom of the ocean,
and I had each of these fly by at the same speed and distance
and recorded the sound they made.
The Johnson Sea-Link -- (whirring noise) --
which you can probably just barely hear here,
uses electric thrusters -- very, very quiet.
The Tiburon also uses electric powered thrusters.
It's also pretty quiet, but a bit noisier. (Louder whirring noise)
But most deep-diving ROVs these days use hydraulics
and they sound like the Ventana. (Loud beeping noise)
I think that's got to be scaring a lot of animals away.
So for the deep sea squid hunt,
I proposed using an optical lure
attached to a camera platform
with no thrusters, no motors,
just a battery-powered camera,
and the only illumination coming from red light
that's invisible to most deep-sea animals
that are adapted to see primarily blue.
That's visible to our eye,
but it's the equivalent of infrared in the deep sea.
So this camera platform, which we called the Medusa,
could just be thrown off the back of the ship,
attached to a float at the surface with over 2,000 feet of line,
it would just float around passively carried by the currents,
and the only light visible to the animals in the deep
would be the blue light of the optical lure,
which we called the electronic jellyfish, or e-jelly,
because it was designed to imitate
the bioluminescent display
of the common deep sea jellyfish Atolla.
Now, this pinwheel of light that the Atolla produces
is known as a bioluminescent burglar alarm
and is a form of defense.
The reason that the electronic jellyfish worked as a lure
is not because giant squid eat jellyfish,
but it's because this jellyfish only resorts to producing this light
when it's being chewed on by a predator
and its only hope for escape
may be to attract the attention of a larger predator
that will attack its attacker
and thereby afford it an opportunity for escape.
It's a scream for help, a last-ditch attempt for escape,
and a common form of defense in the deep sea.
The approach worked.
Whereas all previous expeditions had failed to garner
a single video glimpse of the giant,
we managed six, and the first triggered wild excitement.
Edith Widder (on video): Oh my God. Oh my God! Are you kidding me?Other scientists: Oh ho ho! That's just hanging there.
EW: It was like it was teasing us, doing a kind of fan dance --
now you see me, now you don't --
and we had four such teasing appearances,
and then on the fifth, it came in and totally wowed us.
(Music) Narrator: (Speaking in Japanese)
Scientists: Ooh. Bang! Oh my God! Whoa!
(Applause)
EW: The full monty.
What really wowed me about that
was the way it came in up over the e-jelly
and then attacked the enormous thing next to it,
which I think it mistook for the predator on the e-jelly.
But even more incredible was the footage shot
from the Triton submersible.
What was not mentioned in the Discovery documentary
was that the bait squid that Dr. Kubodera used,
a one-meter long diamondback squid
had a light attached to it, a squid jig
of the type that longline fishermen use,
and I think it was this light
that brought the giant in.
Now, what you're seeing
is the intensified camera's view under red light,
and that's all Dr. Kubodera could see when the giant comes in here.
And then he got so excited,
he turned on his flashlight because he wanted to see better,
and the giant didn't run away,
so he risked turning on the white lights on the submersible,
bringing a creature of legend
from the misty history into high-resolution video.
It was absolutely breathtaking,
and had this animal had its feeding tentacles intact
and fully extended,
it would have been as tall as a two-story house.
How could something that big
live in our ocean and yet remain unfilmed until now?
We've only explored about five percent of our ocean.
There are great discoveries yet to be made down there,
fantastic creatures representing millions of years of evolution
and possibly bioactive compounds
that could benefit us in ways that we can't even yet imagine.
Yet we have spent only a tiny fraction
of the money on ocean exploration
that we've spent on space exploration.
We need a NASA-like organization for ocean exploration,
because we need to be exploring and protecting
our life support systems here on Earth.
We need — thank you. (Applause)
Exploration is the engine that drives innovation.
Innovation drives economic growth.
So let's all go exploring,
but let's do it in a way that doesn't scare the animals away,
or, as Mike deGruy once said,
"If you want to get away from it all
and see something you've never seen,
or have an excellent chance of seeing something that no one's ever seen,
get in a sub."
He should have been with us for this adventure.
We miss him.
(Applause)
コツ:単語をクリックしてすぐ意味を調べられます!

読み込み中…

【TED】エディス・ウィダー: いかにして巨大イカを見つけたか (How we found the giant squid | Edith Widder)

5390 タグ追加 保存
劉家豪 2015 年 8 月 11 日 に公開
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