David Àvalos, Pablo Esteban

5th A

1.-Scientific name2.-Rating3.-Biology4.-Physical characteristics5.-Reproduction6.-Risk level of the specie7.-Questions

•Shark's scientific name is selachimorpha (selachos=shark morphe=form)

Animals

Vertebrates

Invertebrates

Fish

Birds

Mammals

Reptiles

Amphibians

•The sharks live in the sea, they live in groups,

they are carnivorous and oviparous.

•The sharks can measure 17 cm up to 18 meters,•They weight about a ton.

•Most sharks are oviparous, meaning that the eggs hatch in the oviduct within the mother's body and that the egg's yolk and fluids secreted by glands in the walls of the oviduct nourishes the embryos. The gestation period is of 18 months to 24 months.

•They are in risk beacause:

The fins, used in Asian cuisine for the famous soup, usually have a much higher value than the rest of the body and can exceed 100 € for kilo. Therefore, fishermen usually practice "finning", which annually kills about a hundred million sharks. Involves cutting the fins and throw the bodies dead or dying back into the water, using only between 2% and 5% of the animal, and including young sharks.

Why the sharks is a risk specie? Because the sharks are used in Asia

to meke his suop, and they kill a lot of sharks.

The sharks kill a lot of peopple? No, they only kill 30

persons in a year.

•One of the ancestors of today was the Megalodon shark, between 12 and 15 m, the largest carnivore that has sailed the seas

•Only four species of Tiburon, of more than 300, has attack the man