OUT OF MIND
Would you like to react to this message? Create an account in a few clicks or log in to continue.
Latest topics
» As We Navigate Debs Passing
An Incredible Thing Happens When Dolphins And Humans Team Up EmptyMon Jan 08, 2024 6:18 pm by Ponee

» 10/7 — Much More Dangerous & Diabolical Than Anyone Knows
An Incredible Thing Happens When Dolphins And Humans Team Up EmptyThu Nov 02, 2023 8:30 pm by KennyL

» Sundays and Deb.....
An Incredible Thing Happens When Dolphins And Humans Team Up EmptySun Oct 01, 2023 9:11 pm by NanneeRose

» African Official Exposes Bill Gates’ Depopulation Agenda: ‘My Country Is Not Your Laboratory’
An Incredible Thing Happens When Dolphins And Humans Team Up EmptyThu Sep 21, 2023 4:39 am by NanneeRose

» DEBS HEALTH
An Incredible Thing Happens When Dolphins And Humans Team Up EmptySun Sep 03, 2023 10:23 am by ANENRO

» Attorney Reveals the “Exculpatory” Evidence Jack Smith Possesses that Exonerates President Trump
An Incredible Thing Happens When Dolphins And Humans Team Up EmptyTue Aug 29, 2023 10:48 am by ANENRO

» Update From Site Owner to Members & Guests
An Incredible Thing Happens When Dolphins And Humans Team Up EmptyTue Aug 29, 2023 10:47 am by ANENRO

» New global internet censorship began today
An Incredible Thing Happens When Dolphins And Humans Team Up EmptyMon Aug 21, 2023 9:25 am by NanneeRose

» Alienated from reality
An Incredible Thing Happens When Dolphins And Humans Team Up EmptyMon Aug 07, 2023 4:29 pm by PurpleSkyz

» Why does Russia now believe that Covid-19 was a US-created bioweapon?
An Incredible Thing Happens When Dolphins And Humans Team Up EmptyMon Aug 07, 2023 4:27 pm by PurpleSkyz

»  Man reports history of interaction with seemingly intelligent orbs
An Incredible Thing Happens When Dolphins And Humans Team Up EmptyMon Aug 07, 2023 3:34 pm by PurpleSkyz

» Western reactions to the controversial Benin Bronzes
An Incredible Thing Happens When Dolphins And Humans Team Up EmptyMon Aug 07, 2023 3:29 pm by PurpleSkyz

» India unveils first images from Moon mission
An Incredible Thing Happens When Dolphins And Humans Team Up EmptyMon Aug 07, 2023 3:27 pm by PurpleSkyz

» Scientists achieve nuclear fusion net energy gain for second time
An Incredible Thing Happens When Dolphins And Humans Team Up EmptyMon Aug 07, 2023 3:25 pm by PurpleSkyz

» Putin Signals 5G Ban
An Incredible Thing Happens When Dolphins And Humans Team Up EmptyMon Aug 07, 2023 3:07 pm by PurpleSkyz

» “Texas Student Dies in Car Accident — Discovers Life after Death”
An Incredible Thing Happens When Dolphins And Humans Team Up EmptyMon Aug 07, 2023 3:05 pm by PurpleSkyz

» The hidden history taught by secret societies
An Incredible Thing Happens When Dolphins And Humans Team Up EmptyMon Aug 07, 2023 3:03 pm by PurpleSkyz

» Vaccines and SIDS (Crib Death)
An Incredible Thing Happens When Dolphins And Humans Team Up EmptyMon Aug 07, 2023 3:00 pm by PurpleSkyz

» Sun blasts out highest-energy radiation ever recorded, raising questions for solar physics
An Incredible Thing Happens When Dolphins And Humans Team Up EmptyMon Aug 07, 2023 2:29 pm by PurpleSkyz

» Why you should be eating more porcini mushrooms
An Incredible Thing Happens When Dolphins And Humans Team Up EmptySun Aug 06, 2023 10:38 am by PurpleSkyz

» Study shows that glyphosate impairs learning in bumblebees: a wake-up call for insect conservation
An Incredible Thing Happens When Dolphins And Humans Team Up EmptySun Aug 06, 2023 10:36 am by PurpleSkyz

» The power of automatic writing: a gateway to unlocking your inner wisdom
An Incredible Thing Happens When Dolphins And Humans Team Up EmptySun Aug 06, 2023 10:34 am by PurpleSkyz


You are not connected. Please login or register

An Incredible Thing Happens When Dolphins And Humans Team Up

Go down  Message [Page 1 of 1]

PurpleSkyz

PurpleSkyz
Admin

An Incredible Thing Happens When Dolphins And Humans Team Up

Humans03 February 2023
By Carly Cassella

An Incredible Thing Happens When Dolphins And Humans Team Up DolphinCloseup-642x260 
(vdorse/Getty Images)  

Humans and dolphins on the southern coast of Brazil have created a carefully synchronized 'dance' to shepherd as much migrating mullet into their nets and mouths as possible.

Traditional fishers in the city of Laguna have been working with Lahille's bottlenose dolphins (Tursiops truncatus gephyreus) to capture fish for more than 140 years.
From above, the dolphins appear to drive schools of mullet into the shore, right near fishers who are wading in the shallows. Only after receiving a cue from the dolphins do the fishers throw their nets.

An Incredible Thing Happens When Dolphins And Humans Team Up HumanAndDolphinFishing-642x260

Traditional fisher and dolphin hunting for mullet. (Mauricio Cantor/Oregon State University)
Researchers have spent more than a decade studying this close relationship, and they say it is a rare example of mutualism, in which two species help each other to both improve their chances of survival.
"We knew that the fishers were observing the dolphins' behavior to determine when to cast their nets, but we didn't know if the dolphins were actively coordinating their behavior with the fishers," says marine biologist Mauricio Cantor of Oregon State University.

"Using drones and underwater imaging, we could observe the behaviors of fishers and dolphins with unprecedented detail and found that they catch more fish by working in synchrony."
frameborder="0″ allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" allowfullscreen>
The fight to survive in nature is often portrayed as just that: a battle for limited resources, mates, or territories. But cooperation is also an important part of the equation that tends to get overlooked.
Teamwork and synchronized activity within a species is common – think of fish swimming in a school or lions hunting in packs – but two different animal species working together is [url=http://www.umass.edu/preferen/You Must Read This/Clutton-Brock Cooperation Nature 2009.pdf]far more rare[/url].
Humans have always interacted with wildlife for our own gain. Our ancestors took wild wolves and turned them into domesticated dogs for hunting and protection. They also welcomed cats into the fold. But more often than not in cases of interspecies interactions, only one animal is benefiting, like sharks that feed on the scraps left behind by fishers.

It's more unusual to find a mutually beneficial relationship, but even when two species are after the same prey, lunch doesn't have to be a zero sum game.
Cooperative fishing between humans and cetaceans – aquatic mammals such as dolphins and whales – is a great example of just that.
In the past, human whalers have teamed up with orcas to hunt baleen whales in southeastern Australia. Meanwhile, in Eastern Australia, eyewitness accounts and stories from Aboriginal Australians suggest that dolphins and humans once fished alongside one another more frequently than they do today.
The traditional fishers of Laguna in Brazil are some of the only examples left of such a close and cooperative bond.
Both the dolphins and the local fishers have learned to read each other's body language and respond accordingly.

Fishers, wearing GPS wristbands while wading in the shallows so their motion could be tracked, moved towards dolphins the moment the marine mammals arrived on the scene. They also cast their nets at higher rates when dolphins were around.
Clearly, the mammals were a clue that mullet were near. Fishers who followed their fins were 17 times more likely to capture fish in the shallows. They also caught 4 times as much, even if they spent the same amount of time casting their nets.
"Dolphins clearly generate foraging benefits to fishers and stimulate beneficial actions in response to increased mullet availability that is not present when dolphins are absent," the authors write.

An Incredible Thing Happens When Dolphins And Humans Team Up 52589902196_7cecc07860_c-642x428

A traditional fisher in southern Brazil and a bottlenose dolphin. (Bianca Romeu)
But what do the dolphins get out of it? It's a lot harder to count how much fish a mammal swallows compared to how much a fisher catches. And how does a dolphin's catch in the presence of humans differ to its catch without humans?

Researchers have used a few clues above and below the water to find out. From above, the authors noticed dolphins approaching quite close to fishers and giving them a cue to cast their nets – a deep dive.
Beneath the water, meanwhile, dolphins increase their echolocation clicks when fishers cast their nets. When the nets are down, dolphins also dive for longer.
Researchers suspect the dolphins are benefiting from the way the nets disrupts the school of mullets and sends individuals off on their own, making them easier for them to snag. Underwater footage also shows individual dolphins grabbing fish straight from the nets, and local fishers report feeling this happen often.
Almost all the local fishers interviewed by researchers said they believed the marine mammals were gaining extra fish in the situation.

In the end, the authors calculate that bottlenose dolphins who engage in cooperative fishing are 13 percent more likely to survive.
But if anything were to happen to the dolphins, the mullet, or the humans in this area, those benefits could disappear. There's nothing genetically different about these mammals. This behavior is all about context, and there's no saying how long that context will last.
"Safeguarding cultural behaviors that benefit both humans and wildlife not only encourages their coexistence but is also emblematic of how the conservation of 'culturally significant units' advances the conservation of biodiversity," the authors write.
Mutualism between humans and wildlife is getting more and more rare, Cantor says. It's important we preserve it where we can.
The study was published in PNAS.

THANKS TO: https://www.sciencealert.com/an-incredible-thing-happens-when-dolphins-and-humans-team-up

Back to top  Message [Page 1 of 1]

Permissions in this forum:
You cannot reply to topics in this forum