International Development News
Development News Edition

NOAA discovers very first natural Manta ray in Gulf of Mexico

Recent genetic evidence indicates that oceanic mantas and a proposed third manta species (Mobula cf birostris) are present at the banks.


NOAA discovers very first natural Manta ray in Gulf of Mexico
Recent genetic evidence indicates that oceanic mantas and a proposed third manta species (Mobula cf birostris) are present at the banks. (Image Credit: Twitter)

Scientists have discovered the world's first known natural manta ray nursery, which could allow them to observe the juvenile marine creatures in their habitat and learn more about them.

Located in the Gulf of Mexico off the coast of Texas at US National Oceanic and Atmospheric Administration (NOAA)'s Flower Garden Banks National Marine Sanctuary, the juvenile manta ray habitat is the first of its kind to be described in a scientific study.

Joshua Stewart, a PhD candidate at Scripps Institution of Oceanography at the University of California San Diego in the US, observed the juvenile mantas while conducting research on manta population structure at Flower Garden Banks.

"The juvenile life stage for oceanic mantas has been a bit of a black box for us, since we're so rarely able to observe them," said Stewart, lead author of the study published in the journal Marine Biology.

"Identifying this area as a nursery highlights its importance for conservation and management, but it also gives us the opportunity to focus on the juveniles and learn about them," he said.

"This discovery is a major advancement in our understanding of the species and the importance of different habitats throughout their lives," he added.

Known as the gentle giants of the sea, oceanic manta rays (Mobula birostris) are large, plankton-eating rays that live in the open ocean and can reach sizes of up to 7 metres in wingspan as adults.

Oceanic mantas are typically found in subtropical and tropical waters around the world with aggregation sites commonly found far from coastal areas, making their populations hard to access and study.

For this reason, major knowledge gaps remain in their basic biology, ecology, and life history. Baby mantas are virtually absent from nearly all manta populations around the world, so even less is known about the juvenile life stage.

Stewart has spent the past seven years studying manta rays and encountered hundreds of adults in the wild, but his sighting of a juvenile at Flower Garden Banks in 2016 was a rare encounter for him.

After noticing several other small mantas in the area, he talked with the marine sanctuary staff to see if this was a regular occurrence.

Working with marine sanctuary staff, Stewart and colleagues looked through 25 years of dive log and photo identification data collected by sanctuary research divers.

Mantas have unique spot patterns on their underside that can be used to identify individuals, much like a human fingerprint.

Using the photo IDs and observational data, researchers determined that about 95 per cent of the mantas that visit Flower Garden Banks are juveniles, measuring an average of 2.25 metres in wingspan.

The researchers also compared the habitat use of mantas at the banks to established criteria for defining shark and ray nursery habitats and determined that the sanctuary is the world's first confirmed manta nursery ground.

Recent genetic evidence indicates that oceanic mantas and a proposed third manta species (Mobula cf birostris) are present at the banks.

(This story has not been edited by Devdiscourse staff and is auto-generated from a syndicated feed.)


TRENDING

OPINION/BLOG/INTERVIEW

'No escape from telephones', this 1953 prediction actually comes true

In 1953, a telephone company chief predicted that therell be no escape from telephones in the future....

With Ayodhya verdict, CJI starts clearing high profile pending cases

Ending all the speculations, the Chief Justice of India Mr. Ranjan Gogoi who is due to retire on November 17 decided to deliver the verdict in Ayodya dispute at 10.30 am on Saturday which is not a working day for the Supreme Court. This is ...

How partnerships and collaborations could enhance teacher training

Monica Malhotra Kandhari, Managing Director, MBD Group shares her views on public private partnership and collaborations in education sector. She supports her propositions with her organisations success stories....

Fixed Test centers would facelift level of WTC in India

The venues for the test matches in India should be fixed so that World Test Championship matches remain fair....

Videos

Latest News

Aamir Khan posts first look from 'Laal Singh Chaddha'

Superstar Aamir Khan on Monday shared his first look from the much-awaited film Laal Singh Chaddha. An official remake of Tom Hanks 1994 feature Forrest Gump, the film is being directed by Advait Chandan. Kareena Kapoor Khan is playing the ...

Winter session should be productive with high quality debates: Modi

Prime Minister Narendra Modi on Monday expressed the hope that the Winter session of Parliament will be a productive one with high quality debates in which all MPs will contribute through their intellect. The government is open to discussio...

HRD Ministry appoints committee to recommend ways to restore normal functioning of JNU

The HRD Ministry on Monday appointed a three-member committee to recommend ways to restore normal functioning of the Jawaharlal Nehru University JNU, officials said.The Human Resource Development HRD Ministrys committee on JNU will initiate...

China defends brief troop deployment in Hong Kong

Chinas military on Monday defended a brief deployment of soldiers onto Hong Kongs streets, as it warned ending the violence was the most pressing task in the city. Dozens of soldiers emerged from their barracks in Hong Kong on Saturday to h...

Give Feedback