Navigation Links
First satellite tag study for manta rays reveals habits and hidden journeys of ocean giants

Using the latest satellite tracking technology, conservationists from the Wildlife Conservation Society, the University of Exeter (UK), and the Government of Mexico have completed a ground-breaking study on a mysterious ocean giant: the manta ray.

The research team has produced the first published study on the use of satellite telemetry to track the open-ocean journeys of the world's largest ray, which can grow up to 25 feet in width. Researchers say the manta raylisted as "Vulnerable" by the International Union for Conservation of Nature (IUCN)has become increasingly threatened by fishing and accidental capture and now needs more protection.

The study was published today in the online journal PLoS One. The authors include: Rachel T. Graham of the Wildlife Conservation Society and the University of Exeter; Matthew J. Witt of the University of Exeter; Dan W. Castellanos of the Wildlife Conservation Society; Francisco Remolina of the National Commission of Protected Areas, Cancun, Mexico; Sara Maxwell of the Marine Conservation Institute and the University of California-Santa Cruz; Brenden J. Godley of the University of Exeter; and Lucy A. Hawkes of Bangor University, Bangor, United Kingdom.

"Almost nothing is known about the movements and ecological needs of the manta ray, one of the ocean's largest and least-known species," said Dr. Rachel Graham, lead author on the study and director of WCS's Gulf and Caribbean Sharks and Rays Program. "Our real-time data illuminate the previously unseen world of this mythic fish and will help to shape management and conservation strategies for this species."

The research team attached satellite transmitters to manta rays off the coast of Mexico's Yucatan Peninsula over a 13-day period. The tracking devices were attached to the backs of six individuals four females, one male, and one juvenile.

"The satellite tag data revealed that some of the rays traveled more than 1,100 kilometers during the study period," said Dr. Matthew Witt of the University of Exeter's Environment and Sustainability Institute. "The rays spent most of their time traversing coastal areas plentiful in zooplankton and fish eggs from spawning events."

Like baleen whales and whale sharks, manta rays are filter feeders that swim through clouds of plankton with mouths agape.

The research team also found that the manta rays spent nearly all their time within Mexico's territorial waters (within 200 miles of the coastline), but only 11.5 percent of the locations gathered from the tagged rays occurred within marine protected areas. And the majority of ray locations were recorded in major shipping routes in the region; manta rays could be vulnerable to ship strikes.

"Studies such as this one are critical in developing effective management of manta rays, which appear to be declining worldwide," said Dr. Howard Rosenbaum, Director of WCS's Ocean Giant Program.

In spite of its malevolent, bat-like appearance, the manta raysometimes referred to as the "devilfish"is harmless to humans and lacks the stinger of the better-known stingray. The manta ray possesses the highest brain to body ratio of all sharks and rays and gives birth to live young, usually one or two "pups" every one or two years. Manta rays are apparently declining in the Caribbean and in other tropical regions of the world's oceans, in part because they are captured for shark bait and a demand for gill rakers (small, finger-like structures that filter out the ray's minute zooplankton prey) in the traditional Chinese medicinal trade.

Contact: John Delaney
Wildlife Conservation Society

Related biology news :

1. China poised to accept first-ever non-animal test method for cosmetics
2. First oral agent to quell invasive macular degeneration, restore lost vision
3. Researchers discover first gene linked to missing spleen in newborns
4. First-of-its-kind study reveals surprising ecological effects of earthquake and tsunami
5. Medical device, health professionals attend first national conference on value-driven engineering
6. University of Nevada, Reno first to show transgenerational effect of antibiotics
7. Scientists provide first large-scale estimate of reef shark losses in the Pacific Ocean
8. Aware, Inc. Reports First Quarter 2012 Financial Results
9. Buttercups alert farmers to first signs of subarctic fungus in the UK
10. First-ever release of endangered burying beetles in Missouri
11. Maryland gets its first Certified Sustainable community: Berlin
Post Your Comments:
Related Image:
First satellite tag study for manta rays reveals habits and hidden journeys of ocean giants
(Date:10/29/2015)... 29, 2015   MedNet Solutions , an innovative ... of clinical research, is pleased to announce that it ... (MHTA) as one of only three finalists for a ... Small and Growing" category. The Tekne Awards honor ... superior technology innovation and leadership. iMedNet™ ...
(Date:10/29/2015)... Oct. 29, 2015 Daon, a global leader ... has released a new version of its IdentityX ... North America have already installed IdentityX ... includes a FIDO UAF certified server component ... to activate FIDO features. These customers include some of ...
(Date:10/29/2015)... 29, 2015  Connected health pioneer, Joseph C. ... of technology-enabled health and wellness, and the business opportunities ... The Internet of Healthy Things . Long ... even existed, Dr. Kvedar, vice president, Connected Health, Partners ... delivery, moving care from the hospital or doctor,s office ...
Breaking Biology News(10 mins):
(Date:11/30/2015)... ... November 30, 2015 , ... ... software integration with MarkLogic, the Enterprise NoSQL database platform provider, creating a ... change. , Smartlogic’s Content Intelligence capabilities provide a robust set of semantic ...
(Date:11/27/2015)... ... November 27, 2015 , ... ... that includes over 2,000 technical presentations offered in symposia, oral sessions, workshops, awards, ... spectroscopy, covers a wide range of applications such as, but not limited to, ...
(Date:11/25/2015)... , November 26, 2015 ... Global Biobanking Market 2016 - 2020 report analyzes ... maintaining integrity and quality in long-term samples, minimizing ... long-term cost-effectiveness. Automation minimizes manual errors such as ... technical efficiency. Further, it plays a vital role ...
(Date:11/25/2015)... HOLLISTON, Mass. , Nov. 25, 2015 /PRNewswire/ ... ), a biotechnology company developing bioengineered organ implants for ... will present at the LD Micro "Main Event" ... p.m. PT. The presentation will be webcast live and ... will also be available at the conference for one-on-one ...
Breaking Biology Technology: