Month: December 2011

Saw Shark Species found among new species

Four new deep sea sharks including a “rapier wielding” sawshark are among 140 new species discovered by California Academy of Sciences researchers in 2011, the institution announced in December.

The African dwarf sawshark (Pristiophorus nancyae) was accidentally captured in a 1,600-foot-deep (490-meter-deep) trawl off Mozambique. The animal is only the seventh species of sawshark known to science, according to David Ebert, a research associate at the Academy.

The predator has a long, tooth-studded snout that it uses like a sword, whipping the appendage through schools of fish and then returning to eat any casualties.

Along with the sawshark, a new species of angel shark, Squatina caillieti, was named from a single specimen collected in 1,200-foot-deep (370-meter-deep) water off the Philippine island of Luzon, Ebert said.

Bottom-dwelling angel sharks, whose large pectoral fins resemble wings, lie partially buried in sediment and ambush passing prey.

In addition, two species of lanternshark in the Etmopterus genus were also discovered in Taiwan and South Africa, respectively.

Do whales suffer from the bends like human divers?

orca-whaleResearches had found that  whale also can suffer from the bends like human divers. This sickness happens because of rapid reach to the surface while they are diving and origins by nitrogen bubbles appearance in the bloodstream move as of insistent underwater surroundings. This disease causes pain, skin rashes and even it leads to death in whales.

The scientist also had found extreme human sound such as revelation to armed forces might confuse whales and seals and directing to them losing their normal protection tendency against the disease. The sign to ‘the bends’ captivating grasp is the form of bubbles in the bodies of oceanic mammals. Bubbles are rooted by force raises in nitrogen intensities in the blood and body cells, chased by reduce pressure that sources nitrogen to approach away as bubbles. Sudden noise may cause serious illness or injury during the diving of oceanic mammals.