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مسلسل OceanXplorers مترجم - Episode 1
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00:02the ocean the last frontier on earth so much is unexplored and unexplained to change that a kick
00:13ass team of insanely talented specialists is setting out to push the frontiers of what we
00:18know about our oceans oh my god Zoleka Philander deep-sea scientist being a deep-sea researcher
00:28means having front row tickets to the best movie that everybody wants to watch Melissa Marquez
00:37shark biologist we just saw what no one has seen before Eric Stackpole yeah now ocean tech innovator
00:45I love building tools that allow us to see things in ways we've never seen before and Aldo Kane
00:55former Royal Marines special ops it doesn't get any more cutting-edge exploration than this
01:02their secret weapon the ocean Explorer
01:09the most technologically advanced research vessel ever built there's never been a more urgent need to
01:17understand our ocean and the animals that call it home because their lives and ours depend on it
01:28this time the team is among the giants of the ocean I cannot believe that we are watching this fight
01:35they face an unexpected encounter oh my god the ocean explorer is in the Dominican Republic in the Caribbean
01:59it's heading 50 miles off the islands north coast to an area of the Atlantic Ocean teeming with giants
02:23humpback whales humpbacks are one of the largest whales on the planet they're about 45 feet long and that's the
02:33size of a school bus
02:36we almost hunted these whales to extinction but thanks to the global efforts to bring them back
02:41from the brink just over 50 years ago these whales are now thriving
02:50every winter thousands of humpbacks migrate to these waters to mate and give birth
03:00but as they spend the majority of their time and eat the waves
03:04details of their lives remain a mystery
03:11that's why the team is here to uncover secrets of these whales and some of the most intimate moments
03:17of their lives
03:33the ship is incredible we have a helicopter we have a deep sea rov we have two submersibles any question
03:42that we would want to answer about the humpback whale seems to be answerable with the technology and resources we
03:47have available
03:49we know that humpback whales travel up to 5 000 miles from their feeding grounds in the north Atlantic to
03:56this small patch of ocean and that they come here to breed
04:00but how exactly does a female humpback to find out Eric's job is to first spot the whales
04:12then guide in Aldo and the dive team
04:14to get a rare underwater perspective
04:17all right captain get to go
04:20not so easy
04:27green light green deck
04:29green light green deck
04:33let's go find some whales
04:48the conditions are perfect you could not ask for a better day to be searching for whales
04:52the water is extremely calm
04:54so anything that comes up to the surface of the water we should be able to see
05:00oh my god there are whales everywhere
05:08oh wow that is really cool
05:20with eyes in the sky it doesn't take long oh look at this to spot some courtship action
05:29there's a single adult female surrounded by males
05:35peaceful gatherings like these can suddenly erupt
05:40turning into a frenzied pursuit
05:47oh
05:48whoa what was that move all about
05:50the female is leading the pack
05:54she has a suitor
05:55and he's falling right behind her
06:00female's speeding up
06:05if he loses his position
06:07the chance to mate with her will be up for grabs
06:13whoa is it pushing that one out of the water
06:15yeah it's pushing it out of the water
06:16oh my gosh
06:20white water everywhere
06:24no wonder some scientists call this a fight club
06:29i mean there's just so much muscle and energy in that
06:32i mean each of these weigh more than a truck you know
06:34and they're pounding against each other
06:36speeding through the water
06:41i cannot believe that we are watching this fight club like right below us
06:47mike delta mike delta
06:50this is eagle ray
06:52eagle ray this is mike delta uh we're watching we've counted 11 whales in this group
06:57they've generally been holding the same direction
06:59yeah roger that once we get on location we'll try and get in the water if it's safe to do
07:03so
07:04this is definitely a sprint and it's going to be survival of the fittest
07:11if former special ops aldo and cameraman david can get in the water with the whales
07:16they may be able to record behavior that's invisible from the surface
07:22have you been in the water with 11 whales before
07:25uh only once before was i ever in a in a group this big yeah so it's pretty violent in
07:32fact for
07:32the whales and and so we just got to be careful where we are every time i get in the
07:37water with
07:38big animals i am apprehensive you know this yeah we are in their territory in their environment and
07:44we are tiny in comparison if you get on the wrong side of one of those peck fin slaps or
07:49a tail slap
07:50then uh it's gonna be game over yeah let's try and get in ahead of them yeah absolutely
08:04oh look at that quick turn the whole group just turned 90 degrees like that
08:10they're turning a win you missed it
08:22all right i'm scanning around for anything else
08:27there's a big group three o'clock yeah there's something all right go check these guys out
08:45there are more males around a female but this group appears more relaxed
08:52you may want to try to get in the water here with very little known about the whales courtship rituals
08:59aldo is concerned that any bubbles could spook the animals so they're diving without tanks free diving is
09:08the closest that you can become to to being a mammal in that environment
09:20on one breath you can dive down and be in their world
09:27holding his breath aldo swims to a depth of 70 feet
09:49the whales
09:50these whales seem totally at ease with their visitors
10:06there's a female surrounded by five males
10:21the mood couldn't be more different from the fight club
10:24the mood couldn't be more different from the fight club
10:39she wants the fittest father for her calf
10:44but how will she choose him
10:49one male moves closer
11:00he gently blows a stream of bubbles onto her belly
11:16an encounter this intimate has rarely been seen
11:22we need to try and understand what's going on
11:32what's going on
11:50oh
11:57That was, has to be one of the best experiences I've ever had.
12:06Like when they cruise underneath you, it's literally like having a small plane underneath
12:13you.
12:15We can take those shots back and show some of the scientists on board, they can look
12:19at behaviour, they can maybe tell us what those whales were doing in that social circumstance.
12:30Hey, Rick, I've got some cool stuff for you to look at.
12:34The footage will be analysed by whale scientist Asha DeVos.
12:38The more we observe and the more we document, we can start to actually understand it from
12:42the viewpoint of the whale and I think that's what's really interesting and unique for us.
12:49For the next week, Asha joins the dive team.
12:56Their aim, to collect as much footage as possible, of as many courtship groups as they can find.
13:15Very little is known about a female's mate selection, but by going through every frame…
13:20I hope you're as excited as I am about what we found.
13:23Yeah, I am too.
13:24Asha has made some observations about the female that Aldo dived with.
13:30We know this is a female and you can see her tail is very characteristic.
13:34I call her asymmetrical because it's not a symmetrical pattern.
13:39She's, you know, clearly rolling around, displaying herself.
13:44We see this very intimate moment where they're hanging.
13:47They're not moving much.
13:48For about 15 minutes, they just stayed in one place, like this.
13:53You feel like a really strong bond.
13:55Then you're thinking, this can only lead to mating.
13:58We find another group of six.
14:00If you look carefully, see that's her tail.
14:03Remember?
14:04Asymmetrical.
14:06I don't recognize any of the other males in the group, so she's found a complete new
14:10group of guys.
14:12But I don't understand.
14:13She already found her mate.
14:14Well, that's what we thought.
14:16She does similar things.
14:17She rotates.
14:18She does these really intimate movements.
14:21And then we find a group of 11 animals.
14:24Oh my.
14:24An amazing moment.
14:26And then we start seeing this peck slapping event going on.
14:35And this peck belongs to the same female we saw in the previous two encounters.
14:45She has slipped from one group to the other to the other.
14:50This is more like dating.
14:51And the relationships just aren't quite working out.
14:53But she's still trying to find the one.
14:55Yeah.
14:55She wants a nice strong calf that can survive into, you know, the future.
15:00And she's going to take her time.
15:02I have to look at this kind of like online dating.
15:05You know, swiping away and trying to find, you know, Mr. Right swipe.
15:08Yeah.
15:09Exactly.
15:12And in the short time we've been here, we now have a little intimate peek into the
15:16life of this little lady.
15:18And how she's chosen to maximize her time here on the mating grounds.
15:25We don't know if this female mates with any of the males or carries on looking for the
15:30perfect match.
15:33But in this rare footage, the team has observed just how choosy a female humpback can be.
15:39And there's still so much more to learn.
15:47Off the Dominican Republic, the humpback breeding season is in full swing.
15:54But why do the whales come to this specific patch in the North Atlantic every year?
16:03To find an answer, the team is going to focus on another humpback behavior.
16:07We know that for adult males, it's important to sing during mating season.
16:15And they do this often and for hours at a time.
16:22The team wants to test a hypothesis that the unique underwater landscape here could provide
16:28an advantage for the singing males.
16:33Leading the mission is deep sea scientist Zaleka.
16:38Armed with detailed bathymetry, she'll be diving to a depth of 250 feet.
16:46The ocean explorer has mapped the sea floor and it's revealing a hidden underwater world.
16:53They are these great mountains rising to up to 2,000 feet.
16:57And these are topped with a plateau that stops just below the surface.
17:01So these plateaus have ball-shaped edges on the wall, which are around the size of a football stadium.
17:07And these are what we are interested in.
17:26We can see whales tucked into these half circles.
17:34They remind me of an amphitheater.
17:36Is it possible that they're using these to do something with the song, to make their song easier to hear,
17:42or maybe farther to hear, or louder for other whales?
17:45And so we started getting into this whole hypothesis of whales are using the amphitheaters,
17:52these features out here, to sing in order to broadcast their sound better for other humpback whales.
17:57And that could be a way to improve their chances of finding a mate.
18:03I saw something right above us, just like a flash. It was really strange.
18:09I can hear whales.
18:16100%.
18:18100%.
18:18100%.
18:24Oh, my God.
18:26I'm really excited to see if Mithril's hypothesis is correct.
18:31In order to test it, our plan is to set up a series of microphones within the bowl,
18:37both deep and shallow, to record sound waves.
18:45Okay, where do you want it?
18:47Try right there.
18:48Yeah, we're both talking right in that same patch right there.
18:51Using the sub's robotic arm, they carefully place the deeper microphones around the sides of the bowl.
19:00Very nice.
19:04Testing the amphitheater hypothesis. This is exciting, eh?
19:08It's very exciting.
19:09Directly above them.
19:11All right, I've checked four on into the bucket on my side.
19:14Eric and acoustic scientist Carrie Sager are setting the shallower mics.
19:20So this is the actual part. All of the work is being done by this little bit here, that's the
19:25hydrophone.
19:25This is going to be listening to that sound reverberating off the amphitheater.
19:29Right.
19:29All right, here's the hydrophone.
19:30All right, hydrophone in.
19:32Ready to mark.
19:33Ready to mark.
19:34Number 11 in water.
19:37Number 11, waypoint mark.
19:40A waterproof speaker will play humpback song.
19:44So the plan is that this is going to be about the same depth that a male humpback whale will
19:49sing at.
19:49Okay.
19:51And starting.
19:52All righty.
19:52Waypoint marked.
19:54And we're not going to hear it.
19:56Oh, we do hear it.
19:56We can hear it.
19:57Oh my gosh.
19:58All the microphones, both shallow and deep, will register the volume of the whale song recording.
20:07And it's back to the ship to find out the results.
20:13The acoustic data has been processed.
20:16That's very exciting.
20:17And can now be visualized in the ship's state-of-the-art hololab.
20:24The hololens of all the different pieces of equipment on the ship is the most futuristic.
20:29It feels like living in a science fiction movie where it's like you are interacting with an imaginary world,
20:35like something that's inside of your head, but you can show it to everyone else.
20:38This is a great tool for helping visualize and communicate with others.
20:45It looks like we've gotten some results.
20:47Carrie, what have you seen?
20:48The first thing we're going to see is the very first sound signal coming from speaker A.
20:53Exactly what we would expect from a sound wave moving away from the wall.
20:58The orange is a little quieter.
20:59Yellow is quieter than that.
21:00And then green is, you know, the quietest.
21:02Now we're going to add in the echo from the wall and see if it amplifies these numbers.
21:08So here's our echo.
21:09Yep, coming right off the wall.
21:11And boom.
21:12Boom.
21:13Boom.
21:14Look at the added intensity there.
21:16So everything's red.
21:17Everything's in the 90 decibels.
21:19Like 10, 11 decibels.
21:21That's a huge amount of extra sound energy in the system.
21:2411 decibels.
21:25That's like a multiple.
21:26So now we know the benefit is that they could get that sound to be louder and behind them and
21:31reach more whales.
21:33This is pretty cool to see that, you know, we've uncovered something that's going on here.
21:38Mithriel and Carrie now have proof of concept that the bowl-like features really do amplify a whale's song.
21:46By as much as 11 decibels.
21:49This could be one reason why so many whales come here.
21:56It's just absolutely groundbreaking and huge and a combination of so many years of my work that it doesn't really
22:03get more satisfying than that.
22:08It seems that the underwater terrain is providing an advantage for humpbacks seeking a mate.
22:13But it's not just whales looking to breed that come here.
22:17Females that became pregnant here last year have returned to give birth and to rear their calves.
22:26The warm shallows which lie above the submerged mountaintops provide the perfect nursery.
22:40These waters are believed to be the main reason why a humpback mother travels up to 5,000 miles to
22:46raise her young.
22:49This is a very important place.
22:51It's not just that the calves are born, but they are taught life skills.
22:55This is a big schoolyard.
22:56This is where they also come to teach their young how do you survive if there are predators around.
23:02So they don't have a lot of time to teach those life skills before they have to basically pack up
23:07their bags and take this long migration all the way back to the North Atlantic.
23:11If whale scientist Asha and cameraman David can get an underwater perspective,
23:16they may be able to capture a rare glimpse of the intimate bond between mother and calf.
23:27They approach the mother and calf slowly and the pair seem undisturbed.
23:43Only the females are involved in parenting.
23:50This is mom's time to pour all her energy into her single calf.
24:07Just a few weeks old, the calf bonds with its mother through touch.
24:15Only able to hold its breath for a few minutes, the calf stays with the mom near the surface.
24:30It's entirely dependent on her, guzzling 50 gallons of her rich milk every day.
24:44There's no food for mom here.
24:46She hasn't eaten for five months.
24:56But she must continue to nurse her calf until it's strong enough to survive the journey to their feeding grounds.
25:07The calf clearly got curious, came to see what this other little object in the water was.
25:12All kids are curious. All kids are like, what is that new thing?
25:15But then, you know, a mother's instinct is to make sure that she's protecting that calf.
25:20So mama was like, you know what? Not right now.
25:22And she just, you know, she did a U-turn underwater.
25:25And I guess the calf knew immediately it was time to leave.
25:28Yeah, it was a good, protective mother.
25:30For the survival of their calves, they need to be very protective.
25:34Life for these young whales just to survive, to make it through that first year.
25:38Yep.
25:38To get to be an adult humpback is not easy.
25:43In the nursery grounds, mothers and calves are relatively safe.
25:49But when they enter deeper waters, what dangers does a young humpback face?
25:55To find out, the team now plans to tag a mother and a calf as they start their migration north.
26:05It's down to Eric to find a mother and calf on the move, and guide in Aldo and the tagging
26:11team.
26:13Okay, here we go again.
26:18What's that? Straight ahead.
26:19No, definitely a blow and some action.
26:23Oh, yeah, I see that.
26:30This pair have left the nursery grounds.
26:35For the hungry mother, timing their departure is a life or death decision.
26:41Ocean Explorer, Ocean Explorer, this is Mike Delta.
26:45Mike Delta send.
26:46Hey guys, we are seeing what appears to be a mother and calf.
26:50You may want to take a look at them.
26:51Roger that, thank you.
26:52Out.
26:54So we're going out to put these tags on.
26:56They have cameras, temperature, depth, acceleration sensors.
27:00So with these, we're definitely going to get some good scientific data.
27:05There's something else in the water, just forward of that.
27:16Orca.
27:18Oh, wow.
27:21Also known as killer whales.
27:25These are the ocean's apex predators.
27:30It's a family of adults and juveniles.
27:37They need to eat.
27:40And they're heading straight for the mother and calf.
27:54Oh my god, it's steamed in there.
28:03They're like wolves.
28:04They're surrounding the thing.
28:06Look at that.
28:07Oh my god, she's keeping the calf on her back to keep it from being attacked from underneath.
28:12Its belly is the most vulnerable spot.
28:19The baby just went off the side.
28:21It's trying to get back.
28:26Nobody's ever filmed this here.
28:38This is so tough to watch.
28:41I mean, these orcas are relentless.
28:45But we've got a chance here to understand how mom defends her calf.
28:49And these orcas are some of the most intelligent creatures on the planet.
28:52This is giving us a chance to see how they organize their attack.
28:59What a horrible situation to be in.
29:01I mean, it's just...
29:03I can just picture the emotions this mom has.
29:12Look at that.
29:13It was terrifying.
29:24Mithriel changes the plan on the fly.
29:27Can you see flippers on the surface?
29:29Get ahead. 400 meters.
29:32She now wants to tag an orca.
29:35It could give the team the first ever scientific insight of a hunt in these waters.
29:43Carrie is in charge of tag deployment.
29:47I see flippers.
29:47It's resting underwater.
29:48100 meters.
29:49For everyone's safety, including the animals, timing is critical.
29:59Everyone check.
30:00All right.
30:01You guys, I'm ready to tag whenever you're comfortable.
30:04The tag's four suction cups will attach to the orca without hurting it.
30:08They'll release after 12 hours.
30:11Yeah, okay, we're ready to tag.
30:13If they can get the tag on.
30:17Killer whale coming this way.
30:19Let's let it go under.
30:20Let's let it go under.
30:22Whoa, look at the size of it.
30:24Killer whale underneath us.
30:25Yeah, killer whale underneath.
30:29I got one right up front.
30:31Killer whale's coming up.
30:33Killer whale's under my tag.
30:35Tag!
30:36Tag on!
30:43They've tagged the lead female.
30:49And she's with some pregnant females who need to eat for two.
30:55And juveniles who need to learn to hunt.
31:05This is a battle between two families.
31:14Oh, wow.
31:19These strikes aren't risk-free for the orca.
31:22To protect their vulnerable lower jaw, they hit with the top of their heads.
31:36To see it this close is brutal.
31:40Everybody's gotta eat.
31:41And that's still something that a lot of people forget.
31:43It's important to remember that there's a balance here.
31:46They're doing what they do best.
31:49The orca appear to be coordinating their attack.
31:59Their strategy to separate the calf from its mother.
32:04the pit.
32:05The TIME they cachat its ass.
32:13This is the enlarger scheme.
32:15The mouse has the fps on its own, to 104 foot, so it's not contemporaneous,
32:31the 不是.
32:35The orcas hunting calls can travel up to nine miles through water.
32:41They've been heard.
32:47Another group arrives.
32:55I've heard about this happening, that sometimes two orca groups can come together for a kill.
33:01What's that?
33:01Oh, that's...
33:02Oh, my God.
33:04Oh, my God.
33:06Those are reinforcements.
33:08They are everywhere.
33:13All right, we've now got two huntbacks against 18 orca.
33:29Oh, poor mom has got to be exhausted, and this is all happening.
33:32I mean, how long can she go?
33:36They're just really, they're just wearing the calf and the mother down, aren't they?
33:47It's just like a battle of attrition, isn't it?
33:54It seems to be reaching a breaking point.
34:08The orca finally succeed in isolating the calf, and they drown it.
34:22This calf will feed the orca family.
34:38Studies suggest that other whale species grieve at the death of a calf.
34:43Maybe humpbacks do, too.
34:54What we saw today has never been seen.
34:57Not with the kind of view that we just had.
35:00I'm still taking it in, honestly.
35:02Like, I feel emotionally exhausted.
35:14All the footage from the hunt has been studied in fine detail,
35:17and the team is gathering in the ship's hololab,
35:20where Mithriel can share their findings.
35:24When I started to look at the still photos I took from the boat,
35:28and the video footage from the helicopter,
35:30it looked from the surface that the orca had a simple strategy,
35:35and that's to pursue the mother and the calf until the point of exhaustion.
35:39But once I looked beneath the waves,
35:41with the tag video, it became clear just how complex
35:45and how coordinated their strategies actually are.
35:52Mithriel, you've been able to sort of decipher what was really going on here.
35:55What I realized is we have something really organized.
35:58The alpha male was part of the group on the outside.
36:02Their main job was to keep mom moving and tire her out.
36:06So the alpha male moves into position.
36:09So he did what we're calling a fluke clap.
36:11It's actually cupping that tail, slapping it against the water.
36:15That appears to initiate some kind of signal communication within the group.
36:21Mithriel believes the fluke clap is a signal to two of the orca
36:25to swim in front of the mother humpback, forcing her to slow down.
36:35The next play comes from the lead female.
36:39She does a hit.
36:40She comes up over mom's back, hits the calf, knocks the calf off mom's back.
36:46Mom comes down.
36:47She takes a swift dive down and puts her flipper's way out
36:52and picks up that calf back in the water again, recovers the calf.
36:56Mithriel's analysis is that by working together,
37:00the orca can maintain a relentless attack,
37:04constantly forcing the mother to recover her calf.
37:08The way she did this over and over and over again
37:12really made me think,
37:15this has to be a mother humpback whale that's had experience.
37:18We got a picture underneath her tail.
37:20We submitted that to the catalog.
37:23This mom was sighted 1992 and 1993.
37:26She's at least 30 years old.
37:29This was not the first time she's had to deal with this.
37:31And she did a great job of recovering that calf over and over.
37:40At this age, the mother may have had nine or ten calves.
37:50Some will have become mothers themselves.
37:55Returning here to raise their own calves.
38:01Here in the Dominican Republic,
38:03with the tools of the ocean explorer,
38:07the team have made breakthroughs.
38:09That's very exciting.
38:11In understanding the secret lives of these humpbacks.
38:20Oh my gosh.
38:21I cannot believe that we are watching this fight club right below us.
38:25They may even have figured out why the whales come here.
38:29Boom.
38:30Boom.
38:30There is absolutely nothing more rewarding
38:33than doing new science and finding answers.
38:37They've captured new details in the mating rituals of these giants.
38:42I was freediving with the six big whales
38:45and you're in their world.
38:46They're doing courtship maneuvers.
38:49From my point of view, it's been amazing.
38:51Tag on!
38:52But their greatest revelation comes from their surprise encounter.
38:56Shining new light on the battle tactics between humpbacks and orca.
39:01For me, every single day has been a revelation.
39:03It's overwhelming to be frank.
39:05The team's discoveries will be shared with scientists around the world.
39:10This is just a gold bite.
39:12Increasing our understanding of humpback whales.
39:17The better we know these incredible creatures,
39:20the more we can ensure they continue to thrive.
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