Man and turtle

The man has killed turtles to extract everything in it, meat, skin, shell, eggs ... Thus there have been massacres of turtles and most are now endangered. Present, preserves the nesting beaches and national parks or protected reserves.Turtle eggs are eaten in India. In South America, the oil extracted from the turtle has great value as lamp oil. Elsewhere in the shell used to make musical instruments. But he paid a great price with the massacres, as in three centuries, killed 100 million green turtles.

 

Today is educating the world population to assist in the protection of these animals also are implementing a new technique for fishing nets TED (Turtle Exclusion Device, turtle excluder device) which allows the turtles to come of fishing nets. WWF is also helping to protect sea turtles, at higher risk of extinction, making donations to organizations that protect them.

 

Growth and feeding

The earth turtles are herbivorous; those of fresh water, carnivores and those of sea, omnivorous. The marine turtles eat chorale, who provides to them with calcium, aquatic vegetation, seaweed, and most carnivorous they eat small invertebrates or pulpy, the turtles baúlas eat jellyfish. The turtles constantly migrate between the areas of feeding and those of reproduction. The turtles are in the areas of reproduction in winter and those of feeding in summer.

The marine turtles have a growth

uninterrupted during all their life. When being born, the 50 turtles can weigh g, in a year 2 kg, to the 3 years 20 kg and 300 kg in the maturity (14 years). Maturity reaches the sexual it between the 6 and 15 years. 

reproduction

Males are generally smaller than females and have longer tails and wide. The males are not seen on earth, because it is the female depositing eggs on the beach. Sea turtles have a hole which is twofold: to expel the stool and play. The penis of the male turtle comes out of this hole and it is known that sperm can live for several years in the female turtle.

The turtles reach sexual maturity at the age of 6 to 8 years. Normally, males expect the female off the beach to reproduce. Males perch on top of the female, nail claws and reproduce, and sometimes the females are sinking under the weight of the male and drown. The reproduction is rarely seen on the coast near the beach, because it usually occurs in deeper waters.

General description

The turtles have changed much from the Herpies, their shells are united laterally what it protects of the predators and the variations in the temperature. But all the shells of the turtles of nowadays are not equal, for example, the turtle baúla (coriacea Dermochelys) has a flexible and thin shell (for that reason they are called to them; "smooth turtles").

 

The marine turtles can live on 150 to 200 years according to their species. 35 27 the marine turtles can reach km/h to km/h swimming in the sea. The marine turtles have a neck conformed by 8 vertebrae can dissuade, it inside of the shell, but generally it has little mobility. The turtles do not have teeth, because they have replaced them by sharp tips in the part superior of his mouth. In addition they do not have external ears, only an internal ear, very efficient. The marine turtles have an orifice which has intention double: in order to expel the excrement and for its reproduction. The lungs of the marine turtles are exactly equal to ours and allow to contain the breathing to the turtle by approximately 10 minutes, then they raise the surface to breathe.