The four fish we're overeating -- and what to eat instead | Paul Greenberg

166,828 views ・ 2016-01-13

TED


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翻译人员: Tian Ye 校对人员: Luyao Zou
00:12
So when I was a kid ...
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在我小时候,
00:15
this was my team.
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它们是我的玩伴。
00:16
(Laughter)
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(笑声)
00:17
I stunk at sports.
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我运动很差,
00:19
I didn't like to play them, I didn't like to watch them.
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我既不喜欢玩,也不喜欢看,
00:22
So this is what I did. I went fishing.
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所以我玩的就是这个,钓鱼。
00:25
And for all of my growing up I fished on the shores of Connecticut,
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从小到大,我在康涅狄格州的水边钓鱼,
00:28
and these are the creatures that I saw on a regular basis.
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这些生物都是我经常见到的。
00:32
But after I grew up and went to college,
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但我长大后,上了大学,
00:35
and I came home in the early 90's,
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后来在1990年代初回到家乡时,
00:37
this is what I found.
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我看到的只剩这些。
00:39
My team had shrunk.
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我的玩伴变少了,
00:41
It was like literally having your roster devastated.
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这种感觉真就像 自己的最佳阵容全部报销了。
00:44
And as I sort of looked into that,
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当我开始思考这件事,
00:46
from a very personal point of view as a fisherman,
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完全从一个钓鱼者的个人角度来看,
00:48
I started to kind of figure out,
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我开始想弄明白,
00:50
well, what was the rest of the world thinking about it?
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好吧,世界上其他人是怎么想的?
00:53
First place I started to look was fish markets.
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首先我去看的地方是鱼市。
00:55
And when I went to fish markets,
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当我前往鱼市,
00:57
in spite of where I was --
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不管是在哪里--
00:58
whether I was in North Carolina, or Paris, or London, or wherever --
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无论是在北卡罗来纳州、还是巴黎、 还是伦敦或者别的地方--
01:02
I kept seeing this weirdly repeating trope of four creatures,
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我不断看到四种生物组成的奇怪景像,
01:07
again and again --
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一次又一次--
01:08
on the menus, on ice --
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在菜单上,在冰上--
01:10
shrimp, tuna, salmon and cod.
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虾、鲔鱼、鲑鱼和鳕鱼。
01:13
And I thought this was pretty strange,
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我觉得这样相当奇怪,
01:15
and as I looked at it, I was wondering,
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看着它们,我就在想,
01:17
did anyone else notice this sort of shrinking of the market?
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难道没有别人注意到 市面上的品种在减少吗?
01:21
Well, when I looked into it,
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嗯,随着我更深入的了解,
01:22
I realized that people didn't look at it as their team.
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我发现到人们并没有把它们 看作活生生的伙伴,
01:25
Ordinary people, the way they looked at seafood was like this.
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普通人眼里的海产品是这样的。
01:29
It's not an unusual human characteristic
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把自然世界缩减到 极少的几种要素,
01:31
to reduce the natural world down to very few elements.
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倒也没有违反人类本性。
01:35
We did it before, 10,000 years ago, when we came out of our caves.
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我们以前就干过, 一万年前,我们走出洞穴时。
01:38
If you look at fire pits from 10,000 years ago,
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如果看一下一万年前的篝火遗迹,
01:41
you'll see raccoons, you'll see, you know, wolves,
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可以看到浣熊,可以看到狼,
01:44
you'll see all kinds of different creatures.
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可以看到各种不同的生物。
01:46
But if you telescope to the age of -- you know, 2,000 years ago,
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但当你把目光转向两千年前,
01:49
you'll see these four mammals:
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你会看到这四种哺乳动物:
01:51
pigs, cows, sheep and goats.
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猪、牛、绵羊和山羊。
01:54
It's true of birds, too.
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鸟类也一样。
01:55
You look at the menus in New York City restaurants
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如果看看纽约餐馆的菜单,
01:58
150 years ago, 200 years ago,
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在150年前、200年前,
02:00
you'll see snipe, woodcock, grouse, dozens of ducks, dozens of geese.
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可以看到鹬、山鹬、松鸡、 几十种鸭和几十种鹅。
而继续把目光转向现代畜牧业的时代,
02:05
But telescope ahead to the age of modern animal husbandry,
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02:07
and you'll see four:
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则会看到四种:
02:09
turkeys, ducks, chicken and geese.
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火鸡、鸭、鸡和鹅。
02:12
So it makes sense that we've headed in this direction.
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所以才说, 我们朝着减少市面品种的方向发展。
02:15
But how have we headed in this direction?
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但我们是怎么朝这个方向走的?
02:17
Well ...
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嗯……
02:18
first it's a very, very new problem.
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首先这是个非常非常新的问题。
02:20
This is the way we've been fishing the oceans over the last 50 years.
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这是过去50年间, 我们在海洋里捕鱼的方式。
02:23
World War II was a tremendous incentive to arm ourselves in a war against fish.
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二战极大地刺激了我们 升级装备来向鱼类开战。
02:29
All of the technology that we perfected during World War II --
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我们在二战期间完善的所有技术--
02:32
sonar, lightweight polymers --
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声纳、轻巧的聚合物--
02:34
all these things were redirected towards fish.
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所有这些都转而用来对付鱼类。
02:36
And so you see this tremendous buildup in fishing capacity,
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所以你可以看到捕捞量的惊人增长,
02:39
quadrupling in the course of time,
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从二战结束至今 , 足足翻了两番。
02:41
from the end of World War II to the present time.
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02:44
And right now that means
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那么现在,这就意味着
02:45
we're taking between 80 and 90 million metric tons out of the sea every year.
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我们每年从海洋里捞出八、九千万吨鱼类,
02:49
That's the equivalent of the human weight of China
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这相当于每年从海里捞出,
02:52
taken out of the sea every year.
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全体中国人的重量。
02:54
And it's no coincidence that I use China as the example
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我用中国作例子并非巧合,
因为中国现在是世界最大的渔业国。
02:57
because China is now the largest fishing nation in the world.
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03:00
Well, that's only half the story.
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嗯,这才是故事的一半,
03:01
The other half of the story
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故事的另一半,
03:03
is this incredible boom in fish farming and aquaculture,
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是水产养殖业的惊人发展,
03:07
which is now, only in the last year or two,
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现在,也就是在过去一两年,
03:09
starting to exceed the amount of wild fish that we produce.
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已经超过了野生鱼类的捕捞量。
03:12
So that if you add wild fish and farmed fish together,
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所以如果把捕捞和养殖的鱼类加在一起,
03:16
you get the equivalent of two Chinas created from the ocean
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每年海洋里产出全体中国人总重量的两倍。
03:20
each and every year.
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03:21
And again, it's not a coincidence that I use China as the example,
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再说一次,我用中国作例子并非巧合,
03:24
because China, in addition to being the biggest catcher of fish,
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因为中国不光是最大的捕鱼国,
03:27
is also the biggest farmer of fish.
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也是最大的水产养殖国。
03:30
So let's look though at the four choices we are making right now.
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让我们看看我们制造出来的四个选项。
03:35
The first one --
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第一个--
03:36
by far the most consumed seafood in America and in much of the West,
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目前在美国和西方大部分国家里 消费最广泛的海产品是
03:40
is shrimp.
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虾。
03:41
Shrimp in the wild -- as a wild product --
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野生的虾-- 需要捕捞--
03:44
is a terrible product.
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作为渔业产品非常糟糕。
03:45
5, 10, 15 pounds of wild fish are regularly killed
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要向市场提供一磅虾,通常会杀死 5、10、甚至15磅的野生鱼类。
03:49
to bring one pound of shrimp to the market.
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03:52
They're also incredibly fuel inefficient to bring to the market.
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而且捕虾业的燃油经济性也极差。
03:55
In a recent study that was produced out of Dalhousie University,
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达尔豪西大学最近进行的一项研究显示,
03:58
it was found that dragging for shrimp
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拖网捕虾 是二氧化碳排放最高的捕鱼方式之一。
04:00
is one of the most carbon-intensive ways of fishing that you can find.
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04:04
So you can farm them,
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当然虾也可以养殖,
04:06
and people do farm them,
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也的确有人养殖,
04:07
and they farm them a lot in this very area.
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他们通常在这类区域大量养殖。
04:09
Problem is ...
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问题是--
04:10
the place where you farm shrimp is in these wild habitats --
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养虾的地方在这些野生栖息地里--
04:14
in mangrove forests.
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在红树林里。
04:15
Now look at those lovely roots coming down.
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看看这些往下生长的树根,
04:17
Those are the things that hold soil together,
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是它们在固定土壤,
04:19
protect coasts, create habitats for all sorts of young fish, young shrimp,
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保护海滩, 为所有小鱼小虾创造了栖息地,
04:23
all sorts of things that are important to this environment.
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保护了所有这些对环境非常重要的事物。
04:26
Well, this is what happens to a lot of coastal mangrove forests.
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这个,就是许多沿海红树林所面临的问题。
过去30、40年间, 我们损失了数百万英亩的沿海红树林。
04:29
We've lost millions of acres of coastal mangroves
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04:31
over the last 30 or 40 years.
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04:32
That rate of destruction has slowed,
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破坏速度虽然已经下降,
04:35
but we're still in a major mangrove deficit.
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但红树林的总量仍然严重不足。
04:38
The other thing that's going on here
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这里还有另一个问题,
04:40
is a phenomenon that the filmmaker Mark Benjamin called "Grinding Nemo."
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就是电影制片人马克·本杰明所说的 "碾碎海洋生物"现象。
04:44
This phenomenon is very, very relevant
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你在热带珊瑚礁所看到的一切 都和这个现象高度相关。
04:47
to anything that you've ever seen on a tropical reef.
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04:49
Because what's going on right now,
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因为现在正在发生的是,
04:51
we have shrimp draggers dragging for shrimp,
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捕虾船开过来捕虾,
04:53
catching a huge amount of bycatch,
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会捕到大量的副产品,
04:55
that bycatch in turn gets ground up and turned into shrimp food.
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这些副产品会被磨碎, 变成虾的饲料。
04:59
And sometimes, many of these vessels --
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有的时候,许多这种船--
05:01
manned by slaves --
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都是奴工在工作--
05:03
are catching these so-called "trash fish,"
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来捕捞这些所谓的“垃圾鱼类”,
05:05
fish that we would love to see on a reef,
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这些我们其实很乐于 在珊瑚礁上见到的鱼类,
05:07
grinding them up
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把它们磨碎,
然后变成虾的饲料--
05:09
and turning them into shrimp feed --
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05:10
an ecosystem literally eating itself and spitting out shrimp.
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还真是一个自己吃自己 然后吐出虾来的生态系统。
05:15
The next most consumed seafood in America,
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下一个美国消费最广泛的海产品,
05:17
and also throughout the West,
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在整个西方也是,
金枪鱼(也叫鲔鱼,吞拿鱼)。
05:19
is tuna.
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05:20
So tuna is this ultimate global fish.
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金枪鱼是顶级的全球性鱼类。
05:23
These huge management areas have to be observed
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这些巨大的管理区域都必须受到监控,
05:26
in order for tuna to be well managed.
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以保证对金枪鱼捕捞进行良好管理。
05:28
Our own management area,
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我们自己的管理区域,
05:30
called a Regional Fisheries Management Organization,
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称为地区性渔业管理组织,
05:32
is called ICCAT,
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简称 ICCAT,
05:33
the International Commission for the Conservation of Atlantic Tunas.
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大西洋鲔类保育委员会。
05:37
The great naturalist Carl Safina once called it,
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杰出的自然主义者 卡尔·赛菲纳曾经称之为:
05:39
"The International Conspiracy to Catch all the Tunas."
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“捞光所有金枪鱼国际阴谋会”。
05:43
Of course we've seen incredible improvement
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当然,我们看到ICCAT 在过去两年的巨大进步,
05:45
in ICCAT in the last few years,
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05:46
there is total room for improvement,
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而且完全还有改进空间的,
05:48
but it remains to be said that tuna is a global fish,
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但仍然要强调的是, 金枪鱼是一种全球性鱼类,
05:51
and to manage it, we have to manage the globe.
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要管理它,就必须全球管理。
05:54
Well, we could also try to grow tuna
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那好,我们也可以试试养殖,
05:56
but tuna is a spectacularly bad animal for aquaculture.
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可对于水产养殖来说, 金枪鱼极为糟糕。
05:59
Many people don't know this but tuna are warm-blooded.
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许多人不知道, 金枪鱼其实是温血动物,
06:02
They can heat their bodies 20 degrees above ambient temperature,
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它们可以使自己身体的温度 比环境温度高20度,
06:06
they can swim at over 40 miles an hour.
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它们游泳的速度 超过65公里每小时。
06:08
So that pretty much eliminates
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所以这条基本把养殖鱼类的优点 完全消灭了,对吧?
06:10
all the advantages of farming a fish, right?
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06:12
A farmed fish is --
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一种养殖鱼类--
06:13
or a fish is cold-blooded, it doesn't move too much.
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最好是冷血鱼类, 不怎么爱动,
06:16
That's a great thing for growing protein.
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这样才有利于蛋白质生长。
06:18
But if you've got this crazy, wild creature
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但如果养的是这样 疯狂而野性的生物,
06:20
that swims at 40 miles an hour and heats its blood --
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游速65公里每小时, 还能加热自己的血液--
对水产养殖来说不是个好选择。
06:23
not a great candidate for aquaculture.
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06:25
The next creature --
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下一种生物--
美国和整个西方最广泛消费的海产品--
06:27
most consumed seafood in America and throughout the West --
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鲑鱼(也称三文鱼)
06:30
is salmon.
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06:31
Now salmon got its plundering, too,
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现在鲑鱼也被扫荡一空了,
06:33
but it didn't really necessarily happen through fishing.
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但原因其实不是因为捕捞。
06:36
This is my home state of Connecticut.
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这里是我的家乡康涅狄格州,
06:38
Connecticut used to be home to a lot of wild salmon.
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康涅狄格州曾是许多野生鲑鱼的家乡。
06:41
But if you look at this map of Connecticut,
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可如果看一看这张康涅狄格州地图,
06:43
every dot on that map is a dam.
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图上的每个点代表一个水坝,
06:47
There are over 3,000 dams in the state of Connecticut.
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整个康涅狄格州有超过3,000座水坝。
06:51
I often say this is why people in Connecticut are so uptight --
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我常说这就是为什么 康涅狄格人这么急脾气呢--
06:54
(Laughter)
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(笑声)
06:56
If somebody could just unblock Connecticut's chi,
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要是有人能让康涅狄格通通气,
我觉得世界会变得很美好。
07:00
I feel that we could have an infinitely better world.
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07:02
But I made this particular comment
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我在一次国家公园官员会议上特意提起过,
07:04
at a convention once of national parks officers,
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07:06
and this guy from North Carolina sidled up to me, he says,
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有这么一位北卡罗来纳州的 悄悄靠过来,说:
07:09
"You know, you oughtn't be so hard on your Connecticut,
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“兄弟,你们康涅狄格这种算个啥啊,
07:13
cause we here in North Carolina, we got 35,000 dams."
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因为咱北卡罗来纳州, 咱有35,000座坝嘞。”
07:17
So it's a national epidemic, it's an international epidemic.
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所以说全国都有这个问题, 全世界都有这个问题,
07:20
And there are dams everywhere,
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到处都有水坝,
刚好就是这些水坝,
07:22
and these are precisely the things
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07:23
that stop wild salmon from reaching their spawning grounds.
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挡住了鲑鱼的去路, 让它们无法到达产卵处。
07:26
So as a result, we've turned to aquaculture,
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因此呢,我们就转为养殖,
07:28
and salmon is one the most successful, at least from a numbers point of view.
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而鲑鱼是最为成功的品种之一, 至少许多人这样认为。
07:32
When they first started farming salmon,
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当人们刚开始养殖鲑鱼时,
07:34
it could take as many as six pounds of wild fish
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要消耗六磅的野生鱼类 才能产出一磅鲑鱼,
07:37
to make a single pound of salmon.
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07:39
The industry has, to its credit, greatly improved.
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这一产业已经大大进步了, 的确有功劳,
07:42
They've gotten it below two to one,
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现在已经低于二比一了,
07:44
although it's a little bit of a cheat
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虽然其中有一点欺骗性。
07:46
because if you look at the way aquaculture feed is produced,
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因为如果看看养殖鱼饲料是如何生产的,
07:49
they're measuring pellets --
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是以这种一粒粒的饲料来计算的--
07:50
pounds of pellets per pound of salmon.
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饲料的磅数比鲑鱼的磅数,
07:53
Those pellets are in turn reduced fish.
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而饲料也是用鱼制造的。
07:55
So the actual -- what's called the FIFO, the fish in and the fish out --
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所以实际的鱼的投入和产出比-- 称为 FIFO--
07:59
kind of hard to say.
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就不太好确定。
08:00
But in any case,
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但无论如何,
鲑鱼养殖业有功劳,
08:02
credit to the industry,
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08:03
it has lowered the amount of fish per pound of salmon.
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生产每磅鲑鱼所消耗的鱼类确实下降了。
08:05
Problem is we've also gone crazy
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问题是我们对鲑鱼产量太狂热了。
08:08
with the amount of salmon that we're producing.
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水产养殖是这个星球上增长最快的食品体系,
08:10
Aquaculture is the fastest growing food system on the planet.
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08:13
It's growing at something like seven percent per year.
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它大约每年增长7%。
08:16
And so even though we're doing less per fish
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而虽然单位产量的鱼对应的代价变少了,
08:20
to bring it to the market,
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08:22
we're still killing a lot of these little fish.
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我们仍然在杀死许多这样的小鱼。
08:25
And it's not just fish that we're feeding fish to,
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而且我们不光用鱼来喂鱼,
08:28
we're also feeding fish to chickens and pigs.
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我们还用鱼来喂鸡和猪。
08:31
So we've got chickens and they're eating fish,
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所以我们养的鸡吃鱼,
08:34
but weirdly, we also have fish that are eating chickens.
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但奇怪的是,我们养的鱼也有吃鸡的。
08:38
Because the byproducts of chickens -- feathers, blood, bone --
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因为鸡的副产品-- 羽毛、血、骨头--
08:41
get ground up and fed to fish.
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被磨碎然后喂鱼。
08:44
So I often wonder,
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所以我经常会想,
08:45
is there a fish that ate a chicken that ate a fish?
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会不会有鱼吃了鸡,那鸡又吃了鱼?
08:49
It's sort of a reworking of the chicken and egg thing. Anyway --
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这有点像是先有鸡还是先有蛋的变体。 无论如何--
08:52
(Laughter)
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(笑声)
08:53
All together, though, it results in a terrible mess.
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总的来说,结果是非常糟糕。
08:56
What you're talking about
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我们看到的是,
08:57
is something between 20 and 30 million metric tons of wild creatures
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大约有二、三千万吨的野生生物
09:03
that are taken from the ocean and used and ground up.
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从海洋里打捞出来,然后磨碎。
09:06
That's the equivalent of a third of a China,
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这相当于三分之一中国人的重量,
09:08
or of an entire United States of humans
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或全体美国人的重量,
09:10
that's taken out of the sea each and every year.
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每年要从海里捞出来。
09:14
The last of the four is a kind of amorphous thing.
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四种鱼里的最后一种, 含义有点模糊。
09:16
It's what the industry calls "whitefish."
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行业内称之为“白鱼”,
09:20
There are many fish that get cycled into this whitefish thing
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“白鱼”这个叫法实际包含了许多种鱼,
但我想解释一下由来,
09:23
but the way to kind of tell the story, I think,
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09:25
is through that classic piece of American culinary innovation,
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要先提一下美国饮食革命中的经典桥段,
09:28
the Filet-O-Fish sandwich.
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麦香鱼堡。
09:29
So the Filet-O-Fish sandwich actually started as halibut.
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麦香鱼堡其实最先用的是比目鱼。
09:32
And it started because a local franchise owner
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事情的起因是: 一家麦当劳加盟店的店主
09:35
found that when he served his McDonald's on Friday, nobody came.
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发现他在周五卖汉堡时,没有人来买。
09:40
Because it was a Catholic community, they needed fish.
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因为他是在一个天主教社区里,人们要吃鱼。
09:43
So he went to Ray Kroc and he said,
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所以他去找雷·克罗克,说:
09:45
"I'm going to bring you a fish sandwich, going to be made out of halibut."
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“我要做一种鱼肉汉堡,要用比目鱼做。”
雷·克罗克说:“我不看好。
09:48
Ray Kroc said, "I don't think it's going to work.
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我想做一种呼拉汉堡,
09:51
I want to do a Hula Burger,
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在面包上放一片菠萝。
09:52
and there's going to be a slice of pineapple on a bun.
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09:54
But let's do this, let's have a bet.
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不过这么着吧,我们打个赌,
09:56
Whosever sandwich sells more, that will be the winning sandwich."
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谁的汉堡更好卖, 谁的汉堡就算胜出。”
10:00
Well, it's kind of sad for the ocean that the Hula Burger didn't win.
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好吧,呼拉汉堡最后没有赢, 对大海真是件悲伤的事,
10:04
So he made his halibut sandwich.
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所以他就做了比目鱼堡。
10:06
Unfortunately though, the sandwich came in at 30 cents.
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不过不妙的是, 鱼堡卖30美分一个,
10:10
Ray wanted the sandwich to come in at 25 cents,
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雷希望降到25美分,
10:12
so he turned to Atlantic cod.
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所以他改用了大西洋鳕鱼。
10:14
We all know what happened to Atlantic cod in New England.
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我们都知道新英格兰地区 大西洋鳕鱼的遭遇(几乎灭绝)。
10:17
So now the Filet-O-Fish sandwich is made out of Alaska pollock,
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所以如今的麦香鱼堡 用的是阿拉斯加黄线狭鳕,
10:20
it's the largest fin fish fishery in the United States,
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它是美国捕捞量最大的鱼类,
10:23
2 to 3 billion pounds of fish taken out of the sea every single year.
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每年捕捞20到30亿磅。
10:28
If we go through the pollock,
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如果黄线狭鳕捞完了,
10:29
the next choice is probably going to be tilapia.
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下一个选择很可能是罗非鱼。
10:32
Tilapia is one of those fish nobody ever heard of 20 years ago.
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罗非鱼这种鱼, 二十年前根本没人听说过。
10:35
It's actually a very efficient converter of plant protein into animal protein,
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实际上它可以非常高效地 将植物蛋白转化为动物蛋白,
10:39
and it's been a godsend to the third world.
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对于第三世界,它是天赐之物。
10:41
It's actually a tremendously sustainable solution,
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它其实是一种极好的 可持续发展解决方案,
10:43
it goes from an egg to an adult in nine months.
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它从卵成长为成鱼只需九个月。
问题是,如果对照西方世界的口味,
10:46
The problem is that when you look about the West,
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西方所要的它没有。
10:48
it doesn't do what the West wants it to do.
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10:50
It really doesn't have what's called an oily fish profile.
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它没有这种所谓的“鱼油”卖点。
它没有 EPA,DHA 这些ω-3不饱和脂肪酸,
10:53
It doesn't have the EPA and DHA omega-3s
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10:55
that we all think are going to make us live forever.
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这些我们觉得吃了可以长生不老的东西。
10:59
So what do we do?
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那我们该怎么办?
11:00
I mean, first of all, what about this poor fish, the clupeids?
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首先来说, 这种小鱼怎么样,鲱鱼?
11:03
The fish that represent a huge part of that 20 to 30 million metric tons.
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在上面提到的二、三千万吨里, 这种鱼占了很大一部分。
11:08
Well, one possibility that a lot of conservationists have raised
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其实,许多保护主义者都提到这种可能性,
11:11
is could we eat them?
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它可不可以吃?
11:13
Could we eat them directly instead of feeding them to salmon?
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我们可不可以直接吃它, 而不是用来喂鲑鱼?
11:16
There are arguments for it.
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对此还有些争论。
11:17
They are tremendously fuel efficient to bring to market,
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让这种鱼上市的燃油经济性极高,
11:20
a fraction of the fuel cost of say, shrimp,
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比如和虾比,燃油消耗只是个零头,
11:22
and at the very top of the carbon efficiency scale.
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而且它在碳效率上也是在最前列。
11:25
They also are omega-3 rich, a great source for EPA and DHA.
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它也富含ω-3不饱和脂肪酸, 是EPA和DHA的良好来源,
11:30
So that is a potential.
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所以这是个优点。
11:31
And if we were to go down that route what I would say is,
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如果我们从这点说开来, 我想说的是,
11:35
instead of paying a few bucks a pound -- or a few bucks a ton, really --
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与其在每磅上支出几美元-- 实际是每吨几美元--
11:39
and making it into aquafeed,
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用来把它变成鱼饲料,
11:41
could we halve the catch and double the price for the fishermen
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我们是不是可以将捕捞量减半, 让价格提升一倍,
11:44
and make that our way of treating these particular fish?
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以此作为我们对待这些鱼类的做法吗?
11:49
Other possibility though, which is much more interesting,
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而另一种可能选择就更有意思了,
11:51
is looking at bivalves, particularly mussels.
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就是双壳贝类, 尤其是贻贝。
11:54
Now, mussels are very high in EPA and DHA, they're similar to canned tuna.
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贻贝的EPA和DHA含量非常高, 和鲔鱼罐头相似。
11:59
They're also extremely fuel efficient.
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同样燃油经济性极高。
12:01
To bring a pound of mussels to market
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上市一磅贻贝的碳排放,
12:03
is about a thirtieth of the carbon as required to bring beef to market.
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只有上市一磅牛肉的十三分之一。
12:06
They require no forage fish,
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它们也不用吃鱼,
12:08
they actually get their omega-3s by filtering the water of microalgae.
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它们实际上可以过滤水中的藻类 得到自己的ω-3不饱和脂肪酸。
12:12
In fact, that's where omega-3s come from, they don't come from fish.
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实际上这也是ω-3不饱和脂肪酸的来源, 并不是来自鱼。
12:15
Microalgae make the omega-3s, they're only bioconcentrated in fish.
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ω-3不饱和脂肪酸是藻类制造的, 只是在鱼类体内进行生物富集。
12:19
Mussels and other bivalves
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贻贝和其它双壳贝类
12:21
do tremendous amounts of water filtration.
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能过滤大量的水。
每只贻贝每天能过滤几十加仑的水,
12:23
A single mussel can filter dozens of gallons every single day.
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12:26
And this is incredibly important when we look at the world.
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这点对于世界来说非常重要。
12:29
Right now, nitrification, overuse of phosphates in our waterways
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如今,水体中过量的氮和磷
12:33
are causing tremendous algal blooms.
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导致藻类疯长。
12:35
Over 400 new dead zones have been created in the last 20 years,
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在过去20年里 已经出现了超过400个死亡地带,
12:39
tremendous sources of marine life death.
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大量的海洋生物死亡。
12:44
We also could look at not a fish at all.
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我们还完全可以考虑不是鱼的,
12:46
We could look at a vegetable.
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比如蔬菜,
12:47
We could look at seaweed, the kelps,
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比如海带,褐藻,
12:49
all these different varieties of things that can be high in omega-3s,
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它们有许多不同品种, 均富含ω-3不饱和脂肪酸,
12:53
can be high in proteins,
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富含蛋白质,
12:54
tremendously good things.
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非常好的东西。
12:56
They filter the water just like mussels do.
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它们也和贻贝一样能过滤水,
12:58
And weirdly enough,
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而且奇特之处在于,
13:00
it turns out that you can actually feed this to cows.
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它还真的可以用来喂牛。
13:02
Now, I'm not a big fan of cattle.
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我不太支持养牛业,
13:04
But if you wanted to keep growing cattle
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但如果你希望能继续养牛,
13:06
in a time and place where water resources are limited,
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而所处的时令和地区水资源又有限,
13:09
you're growing seaweed in the water, you don't have to water it --
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就可以在水里种海带, 还不用浇水--
13:12
major consideration.
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很值得考虑。
13:14
And the last fish is a question mark.
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最后一种鱼是一个问号。
13:17
We have the ability to create aquacultured fish
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我们有能力创造出一种养殖鱼类,
13:21
that creates a net gain of marine protein for us.
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它能提供净增量的海洋蛋白质,
13:24
This creature would have to be vegetarian,
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它应当是吃素的,
13:26
it would have to be fast growing,
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它应当生长迅速,
13:28
it would have to be adaptable to a changing climate
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它应当能适应气候变化,
13:31
and it would have to have that oily fish profile,
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而且要有“鱼油”卖点,
13:33
that EPA, DHA, omega-3 fatty acid profile that we're looking for.
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EPA 和 DHA 这些我们希望有的 ω-3不饱和脂肪酸。
13:37
This exists kind of on paper.
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这似乎只存在于纸面上。
13:40
I have been reporting on these subjects for 15 years.
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15年来我一直在报导这方面的话题,
13:44
Every time I do a new story, somebody tells me,
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每次我写一个新故事, 都会有人告诉我,
“我们都能做到,我们都能解决,
13:47
"We can do all that. We can do it. We've figured it all out.
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13:49
We can produce a fish
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我们能创造出这样的一种鱼,
13:51
that's a net gain of marine protein and has omega-3s."
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能提供净增量的海洋蛋白质 和ω-3不饱和脂肪酸。”
13:53
Great.
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很好。
13:54
It doesn't seem to be getting scaled up.
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但这件事看来发展得不够快,
13:57
It is time to scale this up.
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是时候加快迅速了。
13:58
If we do,
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如果我们做得到,
14:00
30 million metric tons of seafood, a third of the world catch,
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那么就有三千万吨的海产品, 世界捕捞量的三分之一,
14:03
stays in the water.
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能留在海里。
14:05
So I guess what I'm saying is this is what we've been going with.
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所以我想说的就是, 这就是我们走过的路。
14:09
We tend to go with our appetites rather than our minds.
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我们总是喜欢口味决定脑袋, 而不是相反。
14:12
But if we went with this, or some configuration of it,
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但如果我们改成这样, 或者组合上有些改变,
14:15
we might have a little more of this.
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那这些就可能会多一些。
14:19
Thank you.
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谢谢大家。
14:20
(Applause)
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(掌声)
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