Sat. Nov 27th, 2021


MBARI scientist Steven Haddock is observing the internal structure of teeth.

MBARI scientist Steven Haddock is observing the internal structure of teeth.
Pictures: Darren Schultz © 2021 MBARI

Marine biologists hope to find all sorts of strange things in the deep sea, but a giant tisk is not one of them.

Marine biologist Steven Haddock and ROV pilot Randy Priket first saw the tick in 2019 while on the R / V. Western Flyer, And it appeared though They ‘d Stumbled upon an ivory. As members of the Monterey Bay Aquarium Research Institute (MBARI) expedition, the two were exploring a deep-sea mount about 185 miles (300 kilometers) off the coast of California.

Haddock and Prequet returned to the scene in July 2021, as they were only able to recover a small portion during their initial inspection. Using ROV Doc rickets And works at depths greater than 10,000 feet (3,070) M), they were able to collect the entire 3-foot-long (1-meter)) tusk, according to an MBARI Press release. Back on shore, the team was able to confirm that Tisk belonged to an extinct Colombian mammoth (Mamuthas Columbi)

“In the deep sea, we find lots of amazing creatures that people wouldn’t believe exist on Earth, but finding this huge tusk so deep and so far from the coast was the most impossible thing in my experience,” Haddock wrote. An email to me.

Randy Pickett (left) pilots an MBARI ROV, while scientist Steven Haddock (right) records a mammoth tisk before a recovery operation.

Randy Pickett (left) pilots an MBARI ROV, while scientist Steven Haddock (right) records a mammoth tisk before a recovery operation.
Pictures: Darren Schultz © 2021 MBARI

“As much as it seemed to us that it was actually a mammoth, my head began to imagine how it rested on top of this distant cement,” he added. “It’s still hard for me to believe that we stumbled upon how it sat there for millennia without being destroyed or buried.”

Excellent preservation of stillUnaltered mammoth tisk cold, high-Daniel Fisher, a paleontologist at the University of Michigan and a member of the research team, explained in a press release that the deep-sea pressure environment is “different from almost everything else we’ve seen anywhere else.” “Other mammoths have been rescued from the ocean, but usually not more than a few tens of meters deep.”

Haddock (left), UC Santa Cruz postdoctoral researcher Katie Moon (center), and University of Michigan paleontologist Daniel Fisher (right) inspect large teeth in the ship's lab.

Haddock (left), UC Santa Cruz postdoctoral researcher Katie Moon (center), and University of Michigan paleontologist Daniel Fisher (right) inspect large teeth in the ship’s lab.
Pictures: Darren Schultz © 2021 MBARI

It is difficult to know exactly how mammoth ticks It has ended so far off the coast, but scientists have seen this kind of thing before. Animal carcasses, whether from Cretaceous dinosaurs Or Modern alligator, Will sometimes sink to the bottom of the ocean After being swept away in the ocean, tides, floods or tsunamis. It happens.

A team of interdisciplinary scientists, including paleontologists, geneticists, oceanographers and geologists, are now planning to study the mulch from different angles. CT scan will provide 3D view, Reveals its structure and internal structure. The team will try to extract and sequence mammoth DNA. Together, these techniques can shed light on the history, age and lineage of the animal. Importantly, they It may also reveal new insights into the evolution and spread of mammoths in North America.

Haddock and Fisher, with oceanographers at UC Santa Cruz, are trying to narrow down the possible locations on land where mammoths may originate. The mineral crust of the tooth may indicate how long it has been resting on the ocean floor, while the restoration of ancient ocean currents may point to its coastal starting point. “We were wondering if it could have flown all the way from Alaska, or if it had taken the shortest route off the California coast. Stay tuned to find out our decisions,” Haddock told me.

In fact, it’s all very primitive, because scientists are taking this opportunity to announce the discovery of specimens and to reveal selected methods of research. This giant tisk has a story to tell and we look forward to hearing from you.

More: Unstable video shows what happens to a dead alligator at the bottom of the ocean.



Source link

By admin

Leave a Reply

Your email address will not be published. Required fields are marked *