南太平洋（2009）

..and they take part in the greatest migration of animals on the Earth.
每天晚上，深海生物
Every night, a world of creatures
从海底游上来尽是浮游生物
rise up from the depths to dine on the small amounts of surface plankton.
深海生物是我们星球 生长相最奇怪的生物
They are among the strangest-looking life forms on our planet.
在这个漆黑的世界，有些是透明的
In this dark world, some are see-through,
也许是为了伪装
perhaps for camouflage.
有些创造光线去交流活着引诱猎物
Some create their own light to communicate or lure in their prey.
其他来自不同的联盟
Others form inexplicable alliances.
这只幼小的拖鞋龙虾
This young slipper lobster
可能用这个作为浮力帮助.
May be using this jelly as a buoyancy aid.
一些大海的流浪汉或许能提供帮助
Some of these ocean vagrants may offer protection,
像这个位虾做的
like this pyrosome is doing for the shrimp.
在世界上最深的海洋
In the world's deepest ocean,
平均深度超过2.5英里
averaging over two-and-a-half miles deep,
新的物种正不断被发现
new species are constantly being discovered.
像这种海马，从来没有被拍摄到
Like this seahorse, never filmed before.
黎明时，这些微小生物
At dawn, these little-known creatures
撤退到深海以求安全
retreat into the safety of the abyss.
CLICKING
CLICKING
但是有些掠食者能随着他们下潜
But there are some predators that can follow them down.
短鳍鲸是出色的深海潜水者.
Short-finned pilot whales are accomplished deep-sea divers.
离开无营养的表层
Leaving the barren upper layers behind,
他们能潜下半英里深
they can swim over half a mile down
而且用他们的声纳追踪乌贼.
And use their sonar to track the huge shoals of squid.
[咔嗒声]
CLICKING
但是他们也被追踪
But they too are being tracked.
FAST CLICKING
FAST CLICKING
海洋中三米长的whitetip鲨鱼
Oceanic whitetip sharks, three metres long,
视大海为温暖的家
and completely at home in the open ocean.
他们不能潜到足够深的地方捕食乌贼
They may not be able to dive deep enough to catch the squid themselves...
但这不能阻止他们为食物游荡
..but that won't stop them hanging around for scraps.
或许在追踪抹香鲸幼仔
Or maybe they're sizing up the calf.
这一只，被成年鲸鱼看护的很好
This one, however, is well guarded
by the bulls.
CLICKING
CLICKING
但是在无尽的海洋里， 发现一餐的机会如此的低
But in the endless blue, where the odds of finding a meal are so low,
以至于最不可能的机会也值得一试
even the slimmest opportunity is worth a try.
或许这就是为什么人们认为
Perhaps this is why the oceanic whitetip
白鳍鲨对遇难水手遭的攻击
is thought to be responsible
比太平洋里其他鲨鱼更多
for more attacks on shipwrecked sailors
比太平洋里其他鲨鱼更多
than any other shark in the Pacific.
Essex 号♥的生还者人有鲨鱼摆布
The survivors of the Essex were at the mercy of sharks.
就和一个水手写的
As one sailor wrote,
我们的努力起初是将他们当做猎物,
"Our utmost efforts, which were at first directed to kill him for prey,
到最后变成了自卫
"became, in the end, self-defence."
现在，更多的，他们需要陆地
Now, more than ever, they needed the salvation of land.
SQUAWKING
SQUAWKING
海鸟通常是看到陆地的希望
Seabirds would have been a ray of hope.
然而热带的鸟能连续在海上飞一个月
While tropic birds can survive at sea for months on end,
其他的，像军舰鸟，每天晚上会栖息地
others, like frigate birds, return to roost every night,
会是陆地的信♥号♥♥
so are a sure sign of nearby land.
有太阳，星辰和地磁场的指引,
Guided by the sun, stars and the Earth's magnetic field,
海鸟能穿越数千英里的毫无特征的海洋
seabirds navigate over thousands of miles of featureless ocean.
他们必须回到陆地繁殖
They must all return to land to breed,
通常是一丁点大的地方
often on little more than dots of sand,
这让他们的技术更令人印象深刻
which makes their navigational skills even more impressive.
最伟大的海洋流浪者，有两米宽的翼展
The greatest ocean wanderer, with its two-metre wingspan,
是信天翁
is the albatross.
为他们的子孙寻找足够的食物
To find enough food for its oversized offspring,
这些信天翁可能已经飞行了6000英里
this black-footed albatross may have travelled a staggering 6,000 miles
在广阔的大海上寻找乌贼和鱼群
across the open ocean looking for hotspots of squid and fish.
BEAKS CLATTER
BEAKS CLATTER
SQUAWKING
SQUAWKING
信天翁的巢
The albatross nest
在夏威夷小岛的浅滩上
on the tiny Hawaiian islands of French Frigate Shoals.
这个小岛只有半英里长
This island may be only half a mile long,
但它为大约30万海鸟提供栖息地
but it provides a base for around 300,000 seabirds.
CHEEPING
CHEEPING
CHEEPING
CHEEPING
在海洋中寻找食物是如此的困难
With food so hard to come by in the open ocean,
新生的小鸟更容易捉到
newly hatched sooty tern chicks are easy pickings
对大一些的军舰鸟来说
for the larger frigate birds.
连续数小时，他们巡视巢穴
For hours on end, they survey the nesting grounds...
等待机会袭击
..waiting for a chance to strike.
SQUAWKING
SQUAWKING
一位母亲试着保护无助的幼鸟
A mother tries desperately to protect her helpless chick.
CHEEPING
CHEEPING
SQUAWKING
SQUAWKING
但是不受保护的既已收到伤害
But an unguarded chick is desperately vulnerable.
这就是军舰鸟等待的
It's what the frigate has been waiting for.
FRENZIED SQUAWKING
FRENZIED SQUAWKING
CHEEPING
CHEEPING
SQUAWKING AND CHEEPING
SQUAWKING AND CHEEPING
CHEEPING
CHEEPING
难怪Essex号♥人员称他们为天生战争鸟
No wonder the crew of the Essex called them the "man of war" birds.
SQUAWKING
SQUAWKING
两周来，军舰鸟持续他们无情的攻击
For two weeks, the frigate birds keep up their relentless aerial assault
知道这些小鸟足够大能够躲开
until finally the sooty tern chicks are old enough to get away.
热带岛屿对生命有明显的吸引力
Tropical islands are an obvious magnet for life.
但是原因却是在水下
But things are just as busy underwater.
深海洋流与这些岛屿碰撞
Deep currents collide with these islands,
将矿物质从深海带上来
forcing small but vital amounts of nutrients up from the depths.
五十米深处，sea fans 第一个受益
At 50 metres deep, sea fans are amongst the first to benefit.
更靠近表面，珊瑚礁有日光帮助他们生长
Closer to the surface, corals have sunlight to help them grow.
多亏最小的营养物
And thanks to the smallest trickle of nutrients,
一个荒凉的沙漠能开出绿洲之花
a barren desert can bloom into an underwater oasis...
支持的生物多样性超过其他任何海域
..supporting a greater variety of life than any other ocean habitat.
这些珊瑚礁吸引绿海龟
These coral reefs are a magnet for green turtles,
提供大还不能提供的
offering a service not available in the open ocean...
珊瑚鱼类的清洁
a good clean-up by a shoal of tangs.
这个工作远比化妆有意义
This work-over is far from cosmetic.
在去除寄生虫的同时
As well as removing parasites,
清洁出去藻类让海龟自♥由♥的游泳
the cleaning stops the build-up of algae, so the turtle can swim freely.
海龟同时也感觉舒服
But it's also got to feel good!
这些海龟航行
These turtles navigate their way
1000英里来穿越无边际的大海
across 1,000 miles of featureless ocean
来到这个孤立的小岛
to reach these tiny, isolated islands.
或许他们用超强的嗅觉
Perhaps they use their super-charged sense of smell
感受洋流带来的陆地的味道
to detect the traces of land in the ocean currents.
也或许想海鸟一样他们有磁场感应
Or maybe, like the seabirds, they too have an internal magnetic compass.
但是无论如何人他们做到了， 他们准备筑巢时
But however they do it, when they're ready to nest,
雌海龟回到她们出生的那个海滩
the females return to the very same beach on which they were born.
她们来时，其他正准备离开
Just as she arrives, others are preparing to leave.
这些七个月大的信天翁幼鸟
These seven-month-old black-footed albatross chicks
已经从父母那里独♥立♥
have recently been abandoned by their parents.
现在，受饥饿驱使，他们开始飞行
And now, driven by hunger, it's their time to get airborne.
不幸的是，空间有限
Unfortunately, with space at a premium,
可使用的空间更少
there is little room for manoeuvre,
他们不得不在水上进行第一次飞行
and they must make their maiden flights over water.
但这不是游泳的场所
But this is no place for a paddle.
虎鲸
Tiger sharks.
一群虎鲸，每只都超过三米长
A dozen sharks, each over three metres long,
已经穿越数百经历参加这次宴会
have crossed hundreds of miles of ocean to attend this annual feast.
惊异的，这些捕食者在同一天到到达
Uncannily, these fearsome predators often arrive on the same day
也就是幼鸟飞行的那天
as the first chicks take to the air.
没有什么力量能将这些幼鸟置于如此境地
Nothing could have prepared these chicks for such an encounter.
然而，尽管看似不动的靶子
Yet, despite looking like sitting ducks,
没有经验的鲨鱼也无从下口
inexperienced sharks find them hard to sink their teeth into.
在食物如此难获得的大洋中
In an ocean where food is so hard to come by,
鲨鱼们不能放弃这些（食物）
the sharks can't afford to keep missing.
他们必须尽快提高技能
They must quickly perfect their technique.