Thursday, 29 June 2017

The main spawning area of turtles in the world

In the breeding season, about 95% of turtles will return to the original birthplace under the guidance of a magnetic field, mating and spawning, sometimes they need to swim 2253 km. The below picture shows the traces of the turtles who crawl on a beach for mating and spawning. So far there are no statistics on the numbers of the main spawning areas of turtles in the world, and here is a brief introduction about three famous turtle spawning areas.

Every year from September to January the following year, the Pacific Olive Ridley sea turtles will conduct a collective shore spawning activity. A turtle only lays eggs every month, lasting for 3-5 days. On the Ostional beach in Santa Cruz, Costa Rica, female turtles dig their nests on the beach with their fins to lay about 10 to 190 eggs, then back to the ocean. Because of natural enemies and other factors, most of turtle eggs can’t survive. After one week, small turtles come out of their nests and return to the sea. This natural phenomenon has lasted more than 100 million years.

The Port Turtle Nature Reserve located in Huidong County, Guangdong, China, with an area of 1400 hectares, is the only one turtle nature reserve in Asia, From June to September, many green turtles will migrate to local turtle Bay, which spawning time is usually after 10 pm. After 49-60 days of natural hatching in the wet sand beach, the shells of Turtle eggs will be broken, little young turtles crawl into the sea one after another. The best tourist season is in the summer and autumn.

On the Orissa in the eastern coast of India, or the southern coast of Mexico, you can see the spectacular scene of thousands of turtles laying eggs. Olive Ridley turtles (one of the world's smallest turtles) produces 1 to 3 nests of eggs per season, about 116 turtle eggs per nest. These eggs need take 7 weeks to hatch. Small turtles will rely on the nutrients in eggshells to crawl into the sea after birth. But scientists found that the beach is very close to local 3 fishing villages, so they wonder how the human and turtle groups share an activity space.

The pictures are from Link 1, Link 2, Link 3, and Link 4.