Documental Tiburón mako, sangre fresca
Al sur de California, frente a la costa de Los Angeles, nuevas pruebas sugieren que los marrajos y los tiburones blancos están en guerra por la misma comida, las focas. Estados dos especies de tiburones están atrapados en una carrera armamentista evolutiva y los tiburones mako estarían empujando a los tiburones blancos fuera de este territorio. En un lugar con tanta densidad de población como el sur de California supondría un enorme riesgo que esta guerra entre tiburones se sitúe tan cerca de los humanos.
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TVTranscript
00:00In the south of California, off the coast of Los Angeles,
00:06new evidence suggests that white sharks and marmots are at war for the same food.
00:16These animals are trapped in an evolutionary arms race.
00:21They could be pushing other sharks, like white sharks, out of this territory and into other places.
00:27In a place with as much population density as the south of California,
00:31it would be a huge risk for them to be getting close to humans.
00:36Now, a team of researchers adopts a new innovative approach
00:41to study the largest marmots on the planet.
00:48Team on board! Team on board! We've got a marmot!
00:51Very good! There he goes! There he goes!
00:53Wow! Wow!
00:56Their mission could reveal that these super predators
00:59are transforming into something really deadly.
01:03Wow!
01:07Maco Shark. Fresh blood.
01:11My name is Dr. Austin Gallagher, marine biologist specializing in sharks.
01:16I've been studying sharks all over the world for many years,
01:19and if I'm being honest, marmots are one of the most difficult species to study.
01:23They're basically tailed torpedoes, designed for speed and explosive activity.
01:28The marmot is unique. It's one of the fastest sharks in the ocean.
01:32It can swim up to 96 kilometers per hour.
01:37For centuries, adult marmots grew up to a maximum length of 2.7 meters and a weight of 450 kilos.
01:45But in the waters of southern California, scientists are observing more and more giants.
01:51We're getting reports of some of the biggest marmots we've ever seen.
01:56Imagine a shark the size of a white shark at the speed of a marmot.
02:01To get to be so big, you have to be able to kill huge prey.
02:08And here, the biggest prey on the menu are seals and sea lions.
02:15The classic predator of sea lions and seals is obviously the great white shark.
02:21But recent evidence suggests that the giant marmots that surround Santa Catalina
02:26could be hampering the hunt for the great white sharks.
02:31In recent years, we've seen photos of seals with huge bite marks
02:35that suggest the presence of marmots.
02:37Scientists can distinguish the bites of the different predators
02:41based on the unique characteristics of their teeth.
02:46The teeth of the marmots come out of their jaws.
02:51Their teeth are designed to catch fast prey,
02:54which makes them perfect predators for seals.
02:58This makes us wonder if these are punctual attacks
03:01or if they're going out to hunt sea lions more often.
03:10That's the goal of this expedition,
03:12to find out if the marmots are selecting and hunting sea lions and seals.
03:19To solve this mystery,
03:21Dr. Austin Gallagher and Dr. Kesley Banks
03:24are divided into two teams with specific tasks.
03:30The submarine science that we're going to do here is take tissue samples.
03:34So we'll use biopsy spears to get a muscle sample
03:37that we'll then take to the laboratory.
03:40The idea is to find out the amount of mercury
03:43in the muscles of these sharks.
03:45We know that sea lions and seals
03:47have more mercury in their tissues than fish,
03:50so if the marmots show high levels, like a sea lion,
03:53we could conclude that these animals
03:55are part of the diet of the local population of marmots.
03:59Kes, this is Austin, can you hear me?
04:01Hi Austin, I can hear you loud and clear.
04:04Alright, good luck out there.
04:06Kesley's team will focus on finding small marmots,
04:10as they are a very important part of their study's puzzle.
04:16We are trying to take small marmot samples
04:19to get a good database of the marmots that only eat fish.
04:22What else have you got there, Pho?
04:24And so by comparing them with the bigger marmots,
04:27we can always determine which part of their diet
04:30is made up of marine mammals.
04:32So once we see a marmot,
04:34we're going to drag it up to this pop-up
04:36and we're going to do a muscle biopsy.
04:38Oh yeah!
04:39Party time!
04:41While Kesley's team is looking for small specimens,
04:44Austin's team is looking for the biggest marmots on the planet.
04:49We've got to get close to the marmots,
04:51and the only way to do that is to either capture them and release them,
04:54or get them close to our ship
04:56to do a data collection under the surface.
04:58Not a very easy task.
05:00Capturing and releasing marmots of this size is very dangerous
05:04because of the unique behavior they show when they hook onto a sedal.
05:09They come up and swim directly up to jump in the air,
05:14violently shaking to incapacitate their prey
05:18before they get back into the water.
05:21Even adult marmots can jump out of the water against a fishing boat,
05:25putting the crew in a dangerous proximity
05:28to their strong bodies and sharp teeth.
05:31Imagine them like motorbikes cutting through the water.
05:34So when you're working with marmots, you've got to be very careful.
05:37Watch out, shark! Watch out!
05:40Up, up, up!
05:42The traditional methods of fishing rod and reel
05:44pose a threat to us as researchers.
05:47For that reason, my team is going to deploy a shark dome.
05:50My name is Andre Musgrove.
05:52I'm an underwater photographer and filmmaker and also an apneathologist.
05:56The shark dome is like a diving dome.
05:59It's like putting a cup in the water and pushing it down
06:03so that there's a little bit of air trapped inside.
06:06It allows us to dive into great depths without the need for diving equipment.
06:11The shark dome is ideal for non-invasive shark research.
06:16This year, I have a partner who will help me on this expedition, Rosy Moore.
06:20Together, we'll get the necessary samples.
06:22I'm a scientist, expert on wildlife and apnea submarine research.
06:26I'm also assisted on this expedition by Liv Dixon.
06:29I'm about to put the transmission camera in the water live.
06:33It's very important to have this point of view
06:36to see everything that swims in the vicinity of the dome.
06:39Let's have a look. It looks very good.
06:42To attract the big marmots to the dome,
06:45the team throws a large amount of bait into the water.
06:49What are you doing, Nick?
06:51Oh, I'm just preparing a little bit of bait, so to speak.
06:56And the bait quickly attracts a very unique visitor.
07:00There's a sea lion right there.
07:02Yeah.
07:03It's in there.
07:04It's in there?
07:05Yeah.
07:06Let's go, let's go.
07:07Yeah, yeah, yeah, yeah.
07:08It's a sea lion.
07:09Oh, my God.
07:10It's right under the birds.
07:11Yeah, right there.
07:12Oh, wow.
07:13This is a very exciting moment because the action is starting up.
07:16And we're going to put the divers in the water
07:18and attempt to pick up some important data.
07:20If the team's theory is correct,
07:22seeing a sea lion could mean there's a giant marmot in the bait.
07:27Andre and Rosie are getting ready for their first dive into the shark dome.
07:32It's just day one, and we're already seeing sea lions.
07:35Obviously, there's a lot of life here.
07:40I've really experienced diving in apnea, but nothing like this.
07:44The shark dome is absolutely unique,
07:46and I'm excited and nervous at the same time.
07:50I've never seen marmots up close,
07:52so this is going to be a learning experience for me.
07:55I've heard they're really intimidating, and that makes me a little nervous.
08:01So, Rosie is an apnea diver with a lot of experience
08:04who's going to help me out in the dome, which is incredible.
08:07I'm encouraged to have a person down there
08:10to keep an eye on me while I work and manage the team.
08:13It's important that we take care of each other's backs.
08:20All right, Andre, if you see a giant marmot, you know what to do.
08:23Here's the spear.
08:25All right, Rosie.
08:27Good luck, guys.
08:28Ready? Let's go.
08:30I hope we get some good results.
08:32Three, two, one.
08:50It's great to be back in the dome.
08:57Wow, this is incredible.
08:59Austin, Austin, go ahead.
09:01Yeah, we've got a good view of you.
09:03It looks like the dome is getting a little foggy. Over.
09:06The condensation will increase very, very quickly.
09:09Yeah, but we want to see it.
09:11Yeah, but we want to see it.
09:13Yeah, but we want to see it.
09:15Yeah, but we want to see it.
09:17The big risk of diving in apnea is carbon dioxide levels.
09:21You run the risk of fainting because your lungs expand
09:24and your brain realizes it doesn't have as much oxygen as it thought.
09:28So things just happen. You faint underwater.
09:31You still got eyes on that sea lion? What's going on?
09:34No, we're not seeing anything.
09:36Watch out, guys. To the right, to the right.
09:39I don't see anything.
09:40I don't see anything.
09:41I don't see anything.
09:42I don't see anything.
09:43I don't see anything.
09:44I don't see anything.
09:45I don't see anything.
09:47Wow!
09:49Wow, that sea lion is surrounding us.
09:54California sea lions like this one can measure up to 2.7 meters long
09:59and weigh more than 450 kilos.
10:02They are an irresistible prey for large white whales
10:05and possibly also for marmots.
10:17Wow, look at that.
10:21Oh, my God, it's a moonfish.
10:25The moonfish is incredible.
10:27It's the largest bonefish in the ocean.
10:29They can weigh up to 2,700 kilos.
10:34Rosie, Andre, how's it going down there?
10:37Go.
10:55Nice.
10:56It's going right to him.
11:08The moonfish can measure up to 1.5 meters long
11:11and are known to be very intrepid.
11:15God, he just hit the camera.
11:19The moonfish is one of the most impressive sharks.
11:22They are very curious, so they investigate everything.
11:29These sharks use their abnormally long pectoral fins
11:33to travel vast expanses of the open sea.
11:41Tintoreras and marmots coincide in many ways.
11:44They eat tuna, bonito, and sometimes even squid.
11:48I have a feeling that a giant marmot is going to appear at any moment, guys.
12:01Wow!
12:02Oh, my God, the giant marmot is chasing the tintorera.
12:06Guys, this is crazy.
12:09Wow!
12:18Andre, Andre, this is the onboard team.
12:20I'm Austin, what do you see?
12:22No, no, right now, we don't see the giant marmot.
12:25Wow, he's too busy.
12:27Yeah.
12:28So, right now, the divers have a little condensation problem.
12:31The pressure at depth, the difference in temperature
12:34between the water and the inside of the dome,
12:36and, of course, their breathing.
12:38Onboard team, onboard team, we have a giant marmot.
12:41Guys, go, go, go.
12:43Seriously?
12:45Hi, Rosie, can you hear me?
12:47Where's the giant marmot right now?
12:49Have you seen it?
12:50It's huge.
12:54It's an amazing giant marmot.
12:56Huge.
12:58There's a giant marmot swimming around the dome,
13:00and we're all trying to see it to find out what's going on
13:03and if the divers will be able to tag it and take a sample.
13:06They're getting ready to leave.
13:15Diver Andre Musgrove is getting ready to get a sample
13:18from one of the side cages of the dome,
13:21where he's dangerously exposed to this huge 3-meter-long marmot.
13:29Come on.
13:31Come on.
13:32There it is.
13:38Make a mistake.
13:39Yeah, I think it's going to pass.
13:41There it is.
13:42Come on, Andre.
13:43Go get it.
13:48The giant marmot is staying in the dome,
13:50but it's not going to leave.
13:52It's not going to leave.
13:54It's not going to leave.
13:55It's not going to leave.
13:56The giant marmot is staying out of the reach of Andre's biopsy spear.
14:02OK, they're going back in.
14:04Andre, talk to me.
14:05What are you seeing?
14:07I can't see it.
14:08And almost as soon as it appeared,
14:10the giant marmot disappeared again into the vastness of the ocean.
14:13Do you see it anywhere?
14:15I can't see it, no.
14:20We haven't seen a giant marmot in over 20 minutes.
14:24We need to go up and reload.
14:28Roger that.
14:29Go up, guys.
14:33It's a very good sign.
14:34We just have to keep going.
14:36We've made up our minds at this point,
14:38and we're going to keep going.
14:39I'm sure we're going to get results.
14:41You should have seen it.
14:43We saw it, believe me.
14:44It was incredible.
14:45We saw it all live.
14:47Yes.
14:48How was it?
14:49It was swimming around us.
14:50It was incredible.
14:51Very different from last year.
14:52Other species have visited us.
14:53We saw the giant marmot pass by.
14:55Yes.
14:56And suddenly we saw a huge figure around us.
14:58That's the sea lion.
14:59It was chasing the giant marmot.
15:01We were adjusting the equipment while we were watching the camera,
15:05and suddenly we heard Rosie say,
15:06shark, shark.
15:07We ran to see what was going on,
15:08and suddenly we saw the giant marmot pass by.
15:10Amazing.
15:11We couldn't believe it.
15:12We were freaking out.
15:13Yes, it was very cool.
15:14It's the first time I've seen a supposed predator
15:17running away from a prey.
15:18I don't know if it was due to a size issue.
15:21Yes.
15:22But that sea lion was very brave,
15:24and it was great to see it.
15:26The most interesting thing is that the giant marmots
15:28are not going to show this kind of behavior to a sea lion,
15:31because they hunt them.
15:33Could it be...
15:34We're attracting a lot of animals to the dome.
15:36I like this area.
15:37I think we'll get it if we keep working hard the next days.
15:40Yes, I agree.
15:41Let's make us some tea so you can warm up,
15:43and we'll try again.
15:46While the dome team rests until their next dive,
15:49at a distance of 16 kilometers,
15:51Dr. Kesley Banks' bait attracts her first visitor.
15:57Hey!
16:02Hello, little friend.
16:04We have a little marmot swimming around us.
16:07Oh, we have two, two.
16:09There are two.
16:10One back there and one here.
16:12Taking samples of these little marmots
16:15is essential for the study,
16:17because they need a database of sharks
16:19that only feed on fish
16:21to compare it to that of those who think they feed on seals.
16:25Yes.
16:26Oh, look how he's coming.
16:27He's right here.
16:28He's coming, he's coming.
16:29About a meter long,
16:31it's likely that this marmot is just over a year old.
16:36There we go.
16:37Oh!
16:39Yes!
16:40He's going to bring him closer to the boat.
16:43Despite not being very big,
16:45if they decide to work with him in the water,
16:47the marmot could jump into the boat
16:49and injure the crew with its sharp teeth.
16:52So, for their safety and that of themselves,
16:55they decide to do the job on deck,
16:57where they have more control.
17:01Oh!
17:02Oh, he's on deck, he's on deck.
17:04Careful, it's a dangerous fish.
17:06You got him?
17:07You got him?
17:11He's still moving.
17:13He's bitten my bucket.
17:14He's bitten the bucket.
17:15The crew channels seawater through the marmot's gills
17:18so that it can continue to breathe
17:20while it extracts a sample of muscle tissue.
17:24She is a female and she is angry.
17:33How's she?
17:34She looks good.
17:35What else do we need?
17:36We're going to let her in.
17:37OK, ready?
17:40Yeah.
17:41All right.
17:45Oh!
17:46That's some running.
17:47Right there.
17:49Wow!
18:00Austin, can you hear me?
18:02I can hear you.
18:03How's it going out there?
18:04We've got a couple of samples of small marmots.
18:07I like that.
18:08Good work.
18:11Is it a good place, then?
18:14After receiving a promising lead,
18:16the crew of La Cúpula moves to a seaweed forest
18:19just 800 metres from their last dive.
18:23We're working with the local fishermen
18:25and they've given us very promising information on the radio,
18:27so hopefully it's going to pay off.
18:30We've been working very hard with Andre and Rosy
18:32and they're exhausted.
18:33So, while they're resting on deck
18:36and getting ready for their next dive,
18:38Liv and I are going to go into the water
18:40and take a look at that seaweed forest
18:42to determine where we're going to put the dome.
18:44The locals have told them that the seaweed forest
18:46that surrounds this rocky outcrop
18:48is also a hunting ground for the great white sharks.
18:51There's a lot to take into account
18:53when you're doing a dive in a seaweed forest,
18:55especially if you know that white sharks hunt here.
18:57So, Liv and I will take a lot of precautions.
18:59We'll be together at all times and we'll work as a team.
19:01This habitat is very complex,
19:03so it's essential to be alert at all times.
19:06I'm going to go down with the harpoon
19:08that has a biopsy spear in case we see a mackerel.
19:12Liv will have a 360-degree camera.
19:14That will give us a new perspective
19:16and could reveal something later
19:18that we might not see the first time on the dive.
19:21Are you ready?
19:23Three, two, one.
19:31Go!
19:38All right, Liv, we're going to go down about 15 metres.
19:40Follow me.
19:43Roger that, Austin. I'm following you.
19:47The seaweed forests that surround Santa Catalina
19:49are some of the most important ecosystems
19:51in the waters of California.
19:56These underwater forests are full of life,
19:59which makes them rich hunting grounds
20:01for hungry sharks.
20:07Wow, this seaweed forest is incredible.
20:11These stems must be about 12 metres long.
20:13It's as if we were on an alien planet.
20:16So much life.
20:18This is beautiful, but there's not much visibility.
20:22We must be alert and watch our backs.
20:26Predators use this seaweed forest as camouflage
20:29to ambush their prey.
20:34Austin, look, look!
20:36It's a seal!
20:40It's a seal!
20:42It's a seal!
20:44It's a seal!
20:45It's a seal!
20:51These seals can be quite large,
20:53weighing between 135 and 180 kilos,
20:56and measuring about two and a half metres or three metres.
21:03Where there are large prey, there are large sharks.
21:08If the marmots are hunting seals and sea lions,
21:10they could be around here.
21:15I can't see the seal.
21:16I don't know where it's gone.
21:21I think I see a shadow in the periphery,
21:23just behind the seaweed.
21:33Look up there!
21:36It's a big white shark!
21:37It's a big white shark!
21:41Although white sharks can be up to six metres long,
21:44they are the sub-adults, like this one,
21:46with which the giant marmots in southern California
21:48could be competing for seals and sea lions.
21:54Liv, watch out!
21:59It's gone.
22:00But it's just what we wanted to see down here,
22:03large predators.
22:05However, there is little visibility
22:06and I think we should get out of the water.
22:09There was a two and a half metre long white shark
22:11just behind you.
22:12All of a sudden, there it was!
22:14Crazy!
22:15This is not a safe place to be a sea mammal,
22:17like a seal or a sea lion,
22:19but it's clear that this is where we should deploy
22:21the dome for the next night dive.
22:23I'm sure the giant marmots will come to us.
22:25I'm glad we're here.
22:26Yeah, me too.
22:30Cass, let me get a hold of you,
22:31just to see how you're doing.
22:32How's everything over there?
22:33Everything's fine.
22:34I'm glad you're here.
22:35Cass, let me get a hold of you,
22:36just to see how you're doing.
22:37How's everything over there?
22:39We're seeing a lot of small marmots
22:40and small sea lions.
22:42Roger that.
22:43Well, let's get ready for a night dive,
22:45see if we're a little bit luckier in the dark.
22:47We just need to get a single sample
22:49to make this work.
22:53Marmots usually hunt at night,
22:55using the protection of the dark
22:57to stalk and ambush their prey.
23:02And the shark dome team
23:03is hoping that the giant marmots
23:05will be less shy after the night.
23:11So, it's nightfall.
23:12We're deploying the dome.
23:13It's time to get the sample we need.
23:15Let's go.
23:20Dome in the water.
23:21This is the best time
23:22to get these predators out.
23:24They have a lot more advantage in the dark.
23:27During a night dive,
23:29especially with the dome,
23:31we have to be very careful about safety.
23:33We have much less light around us.
23:35And even though the dome has lights,
23:37and we're equipped with flashlights,
23:39we don't have much field of vision.
23:41So, we have to remain alert
23:43in case one of these animals shows up.
23:46Good luck.
23:47I'm sure they're a little tense right now.
23:49Yes, of course.
23:50They have to be tense.
23:51This is great.
23:52This is great.
24:00We're starting to see some action.
24:02There are seven, eight,
24:03maybe ten sharks around the dome.
24:05They're right here on the surface.
24:07This is exactly what we want,
24:09to attract other animals to this area
24:11to increase the energy.
24:12And hopefully,
24:13a food frenzy will be unleashed
24:15to attract the marmots.
24:22Three, two, one.
24:40Three, two, one.
24:52Three, two, one.
25:06Dock crew to the dome, do you read me?
25:12Dock crew to the dome.
25:16They're in the dome.
25:22They're in the dome.
25:29To your left.
25:30To your left.
25:32Incredible.
25:34We've seen that stingray live.
25:38The stingrays swim,
25:39waving their fins.
25:43They can reach speeds
25:44of up to 50 kilometers per hour.
25:47And despite their strange appearance,
25:49they are close relatives of sharks.
25:53Wow, that's beautiful.
25:56It's incredible.
25:58The depth here is up to 600 meters.
26:00Anything can emerge from the bottom.
26:16Can you see something?
26:18Oh, look at that stingray.
26:23It's great.
26:24There are some big sharks
26:25down there with you.
26:31These two stingrays
26:32that go around under the dome
26:34are almost three meters long.
26:36That is,
26:37only one less
26:38than the largest
26:39known.
26:43Oh, there's more.
26:44Guys, the activity is increasing.
26:46They're coming and going.
26:47Stay alert.
26:53Oh, the stingray
26:54is right on top.
26:58The stingrays
26:59are known
27:00for their large,
27:01jumping eyes
27:02that allow them
27:03to see in the dark
27:04when they hunt
27:05nocturnal prey
27:06like squid.
27:10We have three sharks
27:11on the right.
27:12They're on the cage
27:13right now.
27:22Rosy, watch out.
27:24These sharks
27:25are very active.
27:26Be careful.
27:32Guys, this is getting
27:33a little dangerous.
27:34Are you okay?
27:35Yes, roger that, Austin.
27:40In an instant,
27:41the stingrays
27:42dispersed,
27:43indicating that
27:44something bigger
27:45could be approaching.
27:48Andre is in
27:49one of the cages.
27:50Stay alert.
27:53It looks like
27:54he's seen something.
28:02A stingray!
28:03What?
28:04There's a stingray here!
28:05Where? Where? Where?
28:12I lost him.
28:13Where is he?
28:14A stingray.
28:15A stingray.
28:16Right on the edge
28:17of the illuminated area.
28:19During a nocturnal
28:20hunt in front of
28:21Santa Catalina Island,
28:22a giant stingray
28:23surrounds the team
28:24of the shark dome.
28:36Awesome.
28:37All of a sudden,
28:38I've seen a stingray
28:39pass by.
28:41It's the perfect size.
28:44Great.
28:46On board,
28:47we have a stingray.
28:48I'm completely sure.
28:50Let's extend
28:51the immersion
28:52for ten minutes
28:53to see if we can
28:54get a sample.
28:56Be very careful.
28:58Andre and Rosy
28:59have been in the water
29:00for over an hour,
29:01so the carbon dioxide
29:02levels inside the dome
29:03are reaching
29:04dangerous levels.
29:07But they've decided
29:08to extend the immersion
29:09a little more
29:10in case the stingray
29:11comes back.
29:15There, there.
29:16Look to your left.
29:17Look to your left.
29:18There.
29:19Right there.
29:20This is crazy.
29:34On board,
29:35do you read me?
29:37We read you loud and clear,
29:38friend.
29:40I don't see it.
29:43It's submerged.
29:44I don't see it.
29:46I'm a little worried
29:47about the CO2 content.
29:48Let's go up.
29:50The giant stingrays
29:51have shown interest
29:52in the dome,
29:53but so far
29:54they've been limited
29:55to investigating
29:56from a distance
29:57out of the reach
29:58of the team's
29:59biopsy spear.
30:02That's the size
30:03we're looking for.
30:04When they're this big,
30:05they can hunt
30:06marine lions.
30:07Let's catch it.
30:08Let's go.
30:09Stingray on three.
30:10One, two, three.
30:11Stingray.
30:16As the sun
30:17rises over Santa Catalina,
30:18the team
30:19has a great advantage.
30:20Local fishermen
30:21have traced
30:22the water
30:23in search of stingrays
30:24and have found
30:25something big.
30:26This morning,
30:27we received a call
30:28from a local fisherman,
30:29Keith Poe,
30:30and he told us
30:31he had found
30:32giant stingrays.
30:33There it is.
30:34It's a super exciting
30:35moment.
30:36Everything is going well.
30:37We have a stingray
30:38three and a half meters
30:39right next to the boat.
30:40It's huge.
30:41It's the kind
30:42of animal we're looking for.
30:43Stingrays are this size,
30:44they hunt marine lions,
30:45and we have one
30:46right here.
30:47Right now,
30:48everything is a little chaotic,
30:49but we're going to
30:50work together
30:51to try to get closer.
30:52Austin,
30:53where do we see
30:54the stingray tagger?
30:55The teams
30:56join forces
30:57to maximize
30:58their chances
30:59of catching
31:00this giant stingray.
31:01While Kesley
31:02is positioning her boat,
31:03the team
31:04of the stingray dome
31:05is preparing
31:06for an immersion.
31:13The conditions
31:14are not very favorable.
31:15It's not the perfect situation,
31:16but we'll do
31:17what we can.
31:19Three,
31:20two,
31:21one.
31:46Team on board,
31:47audio check.
31:49Yes, Andre,
31:50we hear you loud and clear.
32:03Attention, guys,
32:04to your right,
32:05to your right.
32:16Team on board,
32:17we have a stingray.
32:18It's about three meters
32:19above us,
32:20and it's surrounding
32:21the dome.
32:23It suddenly appeared
32:24and sat next to us.
32:26We'll talk in a bit.
32:27That's the one we're looking for.
32:40It's big.
32:41Yeah.
32:42We just need it
32:43to get close
32:44just once.
32:45This is incredible.
33:07The dome
33:08of the stingray
33:09weighs approximately
33:101,300 kilos.
33:11Wow, how it moves.
33:12Yeah.
33:13And in adverse conditions
33:14like this,
33:15it could seriously injure
33:16the divers.
33:21Wow, how it moves
33:22all the way down there.
33:27Yes, the dome
33:28keeps swinging.
33:31Over there, Andre.
33:33Oh, wow.
33:34There it is.
33:35Very good.
33:36I'm going out.
33:37Watch me.
33:44Wow, how it moves.
33:45Yeah.
33:48Team on board,
33:49do you read me?
33:51How's it going, dome?
33:52Let's get to work.
33:53There's a very strong current
33:54down here.
33:56We're going to put an end
33:57to the immersion.
33:59Is the stingray still here?
34:01Yes, the stingray
34:02is still here.
34:04We're going to put an end
34:05to the immersion.
34:06We're going to put an end
34:07to the immersion.
34:09It's coming back.
34:10It's coming back.
34:11Is the stingray still here?
34:13Yes, but it's not coming.
34:15Roger that.
34:16We're going up.
34:18The stingrays
34:19are very difficult to study.
34:20And right now,
34:21I have to make sure
34:22that everyone is safe.
34:23There's a lot of current
34:24and the conditions
34:25on the surface
34:26are the worst of the week.
34:27Yes, the big stingray
34:28is here
34:29and it's the size
34:30we're looking for.
34:31A shark
34:32capable of hunting
34:33sea lions.
34:34The dome works very well
34:35attracting sharks
34:36to the area
34:37and now we're going
34:38to work with Kesley
34:39and her boat
34:40to find the sharks
34:41that we need.
34:43Here we go.
34:44The game begins.
34:45This is what we've been
34:46waiting for.
34:48Coming in.
34:51Come directly to my stern.
34:53We're pulling up
34:54to the Pacifica Lions
34:55pool
34:56to see if we can
34:57attract the biggest
34:58stingray to our boat.
34:59We need to find out
35:00if the stingrays
35:01are feeding
35:02on pycnipeds.
35:03We've got a mako
35:04on the stern.
35:06The stingrays
35:07jump when they're hooked
35:08and can land
35:09on one of the boats.
35:10This means
35:11a great risk
35:12for Kesley's crew
35:13but with the dome
35:14of stingrays
35:15out of service
35:16it's their only chance
35:17to get a tissue sample.
35:19Right there,
35:20right on the surface.
35:23Come on.
35:28Come on.
35:29Take it, take it,
35:30take it, take it.
35:33Here we go.
35:37Good job, Fong.
35:39Good job.
35:47Very good.
35:48There it goes.
35:49There it goes.
35:52Wow!
35:57This 2.5 metre giant
35:58stingray
35:59shows its power
36:00by throwing
36:01its huge body
36:02out of the water.
36:04If a stingray
36:05this size
36:06swung on the boat
36:07it could injure
36:08or kill
36:09one of Kesley's crew
36:10members.
36:12Holy shit!
36:13It's huge!
36:15What's up?
36:16Part of mooring
36:17here is allowing
36:18the animal
36:19to move a little
36:20before we can
36:21start the
36:22tagging process.
36:24So now we're going
36:25to go chase it.
36:27Keep coming,
36:28keep coming.
36:32Got it, got it,
36:33got it.
36:36Good job.
36:37Stop.
36:40We just saw
36:41a stingray jump.
36:43It swung in the air
36:44and it fell
36:45hitting the water
36:46with its tail.
36:47I've tagged
36:48a lot of sharks
36:49in my life
36:50and believe me,
36:51it's a lot more difficult
36:52for the boat
36:53investigators
36:54than it is
36:55for that animal.
36:56It's all aboard.
36:57Come on, Fong,
36:58you've got it.
37:03Very good.
37:04Here it comes,
37:05here it comes.
37:08Here it comes.
37:18Here it comes.
37:19Here it comes.
37:20Watch out, watch out!
37:21Let it go away
37:22if you need it, Fong.
37:23Don't throw it away.
37:24Come on, come on.
37:29These incredible jumps
37:30are part of the reason
37:31why many believe
37:32that, in comparison,
37:33the stingray
37:34is the strongest
37:35shark in the world.
37:37It's the strongest
37:38shark in the ocean.
37:46Turn right.
37:48Guide it to the side
37:49of the boat.
37:50Try to cut
37:51the distance, Rafa.
37:52OK.
38:00I've got it.
38:01I've got it.
38:06Forward.
38:07Forward.
38:08Forward.
38:09Watch out.
38:26That's it.
38:28Come on, let's go.
38:31Let's go.
38:39Get ready to release it.
38:41Get ready to release it.
38:43Release it.
38:44Come on.
38:47That's it.
38:49Well done.
38:55Well done, Fong.
38:56Fong is going to need
38:57a beer after this.
38:59Or two.
39:02We've already got
39:03a giant stingray sample.
39:05The goal is to see
39:06if it feeds on pycnipeds
39:07like we think it does.
39:09We're going to take this
39:10to the lab
39:11and we're going to
39:12look at the mercury levels.
39:16This is a large piece
39:17of tissue.
39:18It's a lot more
39:19than we were expecting
39:20to get,
39:21but it was so tough
39:22to manage
39:23that it broke
39:24two of our mouthpieces.
39:25So we were going to
39:26use a knife
39:27to pull out the sample.
39:28Even so,
39:29she will heal perfectly
39:30in a couple of days.
39:31It's like going
39:32to the dermatologist,
39:33but we have
39:34all this pure gold
39:35because it's a
39:36very large sample.
39:37The mouthpiece
39:38would have given us
39:39a little piece like this
39:40and this is more
39:41than twice as large.
39:42But it's going to be
39:43very interesting
39:44to compare
39:45the information
39:46of this sample
39:47with that of the others.
39:48In this expedition,
39:49we've got to be sure
39:50that we've got
39:51a very large size
39:52stingray.
39:53We've got a sample
39:54of small stingrays
39:55that we've never
39:56heard of.
39:57We've got to be sure
39:58that we've got
39:59a very large sample
40:00of small stingrays
40:01that we know
40:02feed on fish,
40:03which are
40:04comparable
40:05to the ones
40:06we've got
40:07in the Gulf of Mexico.
40:08Let's weld it.
40:09Okay.
40:10And we've got
40:11this young female
40:12in the last minute.
40:13Now we'll be able
40:14to compare
40:15the mercury levels
40:16and then see
40:17how much lower
40:18the mercury level
40:19is on her tissues.
40:20We're excited
40:21to see the results.
40:22Yes!
40:23Yes!
40:24Yes!
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