Name: 加拉帕戈斯群島：研究動物(1/7) (Galapagos: researching the animals (1/7))
Uploaded: 2021-01-14T05:25:09.000Z
Duration: 29 min 10 s
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...about 1,000 kilometres west of South America on the equator.

Martin Wikelski is heading or his research site.

It's an island called Santa Fe, part of the Galápagos Archipelago.

Santa Fe, like all the Galápagos islands,

Many of the animals and plants that now live there

These island species have long fascinated biologists

But this is also a good place for animal physiologists to study.

Like all animals found in isolated, oceanic island groups,

the species found in Galápagos are astonishingly unafraid of people...

And even on an inhabited island, on a hotel patio,

marine iguanas, a Galápagos species, lounge in the shade of the chairs.

With few natural predators, they don't see people as a threat.

to more than 10% of the world's population of these animals.

you're as close to understanding them as you can get.

What we can read in textbooks is knowledge,

There's actually an easier way onto the island.

There's a beach but it's four kilometres away

and that would mean carrying all the equipment to the research site.

So the researchers prefer the quick route.

Most of the islands in the Galápagos Archipelago are uninhabited.

In fact, you need permission to land on them.

Everywhere the human species goes, it affects the environment.

This is one of the few remaining places on the planet

where human influence and access is being tightly controlled.

It took Martin months to secure permission to work here.

This will be the group's laboratory, eating and sleeping quarters.

Everything needed for the three months' stay on the island

that everything is taken away at the end.

So now they're here, what are they going to do?

The iguanas don't fear him but are slightly wary,

Again, this remarkable lack of fear of humans.

It doesn't like being handled but it is astonishingly passive.

Body temperature, obtained by putting a thermometer

which all reptile species, males and females, have.

For a cold-blooded animal, the temperature may seem high.

But it has spent most of the day soaking up the sun.

but are crucial in understanding how this creature lives.

And for the next three months, this animal is one of the sample

that are going to be intensively scrutinised.

So it needs to be picked out from the crowd on the rocks.

Each animal is given a distinctive mark and a number.

The range of species found here, and here alone,

makes these islands an endless source of fascination for biologists.

Santa Cruz, the main inhabited in the archipelago,

a study is underway, which relies as much on the geographical position

of the Galápagos, on the equator, as the species itself.

Beatrix Schramm collects environmental information.

First thing every morning, she measures temperature, humidity

She's interested in the mating behaviour of the tortoises

and is trying to find out what triggers it.

the length of day doesn't change all year round.

So what is triggering the mating behaviour?

Beatrix is looking for measurable signs of sexual activity.

For the physiologist, the starting point is sex hormones,

Collecting urine from a 70kg tortoise is a bit of a problem.

So she gets them from the next best thing.

This faecal samples... I'm not sure from where.

This other one, there are two, I am not sure from whom

because, as you see, there are tortoises just running away now.

Because they are so fast, it could be from another one.

So this will be a little bit older. It's not so humid any more.

This one, perhaps, a little older. Like one hour or something like that.

You can check this. If there is lots of humidity, they just did it.

If I see a tortoise and she's sitting somewhere

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加拉帕戈斯群島：研究動物(1/7) (Galapagos: researching the animals (1/7))

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