Friday, January 22, 2010

Tagged Great White shark traveled from Massachusetts to Florida

Massachusetts marine biologists say one of the great white sharks tagged with electronic tracking equipment last summer off Cape Cod has traveled as far as north Florida.

The great white was one of five sharks tagged by harpoon in September near Chatham by Division of Marine Fisheries biologists. Officials said it was the first successful tagging of great whites in the Atlantic using electronic satellite technology.

Officials said Wednesday that the tag popped off the shark on Friday and began transmitting data by satellite.

Scientists expect tags on the other sharks to surface and begin sending data later this winter and in the spring.

The tags collect water temperatures and depth and light levels, which help determine where the great white has traveled. The information can help scientists better understand shark's migratory behavior.

Saturday, January 02, 2010

Facts about the Great White shark

Great white shark is the most dangerous shark in the sea. This shark can be seen in all the oceans

in the world. However, the largest in the Atlantic Ocean off the coast of the United States. This dangerous sharks have very large teeth and her teeth and can be up to 23 centimeters.

This Shark can be long and more than 12 meters which means that this animal is one of the largest shark that now exist in the ocean. To see this huge shark is enough to go with a boat to a destination in the Atlantic Ocean and set the bait near the boat that will easily lure sharks and it will come to feed.

Great white shark feeds on

all that she found on the road and mainly carnivorous. This Shark is the only carnivore and they eat nothing but meat. This large predator can be difficult and up to 16 tons which makes it one of the most difficult mammals that live in the sea.

Shark is very fast and can reach speeds of 25 miles per hour which enables each to catch your prey. Great white shark eat turtles, other sharks, seals, dolphins and all the fish that exist in the sea and ocean.

This predator is very dangerous to humans, and if a man is found in water near the dangerous sharks would be in big trouble. If you go with your boat or yacht to sail an ocean it will follow your ship in search of food.

Today, Great White Sharks saturated types and are not allowed to love because many years ago were much more numerous and their number amounts to over one million until now in the world by some estimates, there are only about 200,000 of these large and dangerous animals.

Were frequent cases of attacks the people of the Great White, while today cases are rare because they are everywhere in America on the beaches designated as the beach would be a warning to all tourists who come on holiday for all other information about the Shark, you can visit a blog that talks about where they live and what the food as well as everything else about this shark.

Blog is created for all lovers of the Great White Sharks and contains a lot of pictures of this dangerous and beautiful animals.

Great White sharks text messaging lifeguards?

Great White sharks tracked by tags and text messages
Sharks are an ever-present threat in Perth waters Photo: Amos Nachoun / Barcroft USA

More than 70 white pointers have been tagged by scientists is Western Australia in a world first trial that will send beach lifesavers a text message when one of the predators swims close to the Perth shoreline.

Wildlife officials and scientists will also receive the text or email warning when any of the tagged sharks move to within 500m of metropolitan beaches.

The text messages will be triggered less than two minutes after a shark swims over any one of 18 acoustic seabed receivers.

Since the receivers were installed in May, Department of Fisheries' senior research scientist Dr Rory McAuley said sharks had been picked up in Perth waters on four occasion, PerthNow reports.

The last detection was in September.

"The use of the technology that delivers real-time notifications of tag detections hasn't been used in an operational sense anywhere else in the world," Dr McAuley told the website.

The study is aimed at unlocking the secrets of shark migration patterns and how they relate to attacks on humans.

"The information we are hoping to collect will hopefully provide us some answers to the questions we are always asking about how long white sharks spend off our beaches, whether they come back, is there a season, do they come back one year after the other."

In all, researchers hope to tag 100 sharks over the next two years.

The sharks are fitted with the satellite-tracking darts by researchers who shoot or stab the devices into the flank of the animals.

"I think the public's fear of sharks stems largely from a fear of the unknown," Dr McAuley said.

"Any information we can find out about the real risk of people encountering sharks at the beach will hopefully alleviate people's concerns to some degree."

Shark are an ever-present threat in the waters off Perth. Nine years ago, a man was killed by a white pointer in waist-deep water off Cottesloe Beach.

Since then, there have been a dozen shark attacks in Western Australia, two of them fatal.