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TechnologySatellites used to protect rare sharks

18:50  08 april  2019
18:50  08 april  2019 Source:   bbc.com

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Earth observation satellites are proving to be valuable tools in protecting rare sharks , say scientists. Why monitor sharks from space? Satellites criss-crossing the globe can analyse factors such as ocean temperature and salinity, which affect the movement of sharks across the world's

Earth observation satellites are proving to be valuable tools in protecting rare sharks , say scientists.

Satellites used to protect rare sharks© Andrey Nekrasov / Barcroft Media INDIAN OCEAN, MALDIVES - APRIL 22: Tawny Nurse sharks (Nebrius ferrugineus) swims in the night on April 22, 2017 in Indian Ocean, Maldives. PHOTOGRAPH BY Andrey Nekrasov / Barcroft Media London-T:+44 207 033 1031 E:hello@barcroftmedia.com - New York-T:+1 212 796 2458 E:hello@barcroftusa.com - New Delhi-T:+91 11 4053 2429 E:hello@barcroftindia.com www.barcroftimages.com (Photo credit should read Andrey Nekrasov /Barcroft Images / Barcroft Media via Getty Images) Satellites scanning the oceans are a valuable new tool to protect sharks, according to scientists.

A review of evidence suggests endangered sharks can be protected from threats such as illegal fishing, using the technology.

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Earth observation satellites are proving to be valuable tools in protecting rare sharks , say scientists. # satellites #utilized #defend #vanishing # sharks .

Shark -spotting programs using surveillance techniques, including drones, private helicopters, observation towers and even blimps, are being trialled in various locations The data is bounced to a satellite and an alert is sent to lifeguards and coastal authorities through a mobile phone app.

Whales, turtles and birds are already being monitored from space, raising hopes that the technique can be applied in the conservation of other species.

Many sharks are on the brink of extinction.

Populations of sharks, rays and skates (elasmobranchs) have declined dramatically over the past 50 years.

"New technologies such as this are going to be really important to the conservation of sharks," said Michael Williamson of the Zoological Society London (ZSL) and King's College, London.

Over-fishing is one of the biggest causes of the decline in sharks, through accidental or illegal targeting.

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Sanctuary Sharks . 137 likes. As countless shark species are driven to the brink of extinction, one glimmer of hope lies with the creation of marine Satellites used to protect rare sharks . Earth observation satellites are proving to be valuable tools in protecting rare sharks , say scientists.

Shark attack indices use different criteria to determine if an attack was "provoked" or "unprovoked." It is extraordinarily rare for this to occur. Bump-and-bite attack – the shark circles and bumps the victim before Sharks are equipped with sensory organs called the Ampullae of Lorenzini that detect the

Predictive models based on big data analysis will be the future in marine conservation, said Maria Jose Cornax of the ocean conservation charity, Oceana, which was not involved in the study.

"The current situation where illegal fishing is addressed on a case-by-case basis may be unaffordable for both governments and the marine environment," she said.

"Technology, transparency and big data analysis could be the solution, helping us in preventing the damage before it happens."

Why monitor sharks from space?

Satellites criss-crossing the globe can analyse factors such as ocean temperature and salinity, which affect the movement of sharks across the world's oceans.

Mining such data will allow sharks to be better protected.

For example, patrol boats could be directed to areas where sharks might be at risk of illegal fishing.

Satellite imagery is also being used in conservation to detect population size - for example with whales and penguins.

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The speartooth shark (Glyphis glyphis) is an extremely rare species of river shark , belonging to the family Carcharhinidae. It inhabits coastal marine waters and tidal reaches of large tropical rivers in northern Australia and New Guinea.

The marine behemoths, which can weigh more than 10,000 pounds, are returning in numbers not seen in decades.

"There's no reason we can't foresee this being moved on to elasmobranchs, especially particularly large ones, which might spend time at the surface, such as whale sharks or basking sharks or even manta rays," said Michael Williamson.

How does this information help in conservation?

Data from satellites combined with other information from electronic tagging of sharks may be used in the future to police illegal fishing.

One study tracked grey reef and silvertip sharks in a protected area of the British Indian Ocean Territory, to see how they move around the oceans.

Such tags could be used in the future to monitor sharks in real time from space, allowing detection of illegal fishing.

Why do we need sharks?

Sharks are at the top of the food chain, which makes them crucial to the health of the oceans.

Fishing - both targeted and accidental - is to blame for the steep decline in many populations, together with habitat loss due to coastal development, degradation of mangrove forests, water pollution and trawling.

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