turtle

Tortoise is a national first-class protected animal, which is extremely rare. It is a more endangered "giant panda in the water" than the Chinese sturgeon. Lv Shunqing, coordinator of WCS amphibian and reptile species project, said that this turtle is the most endangered species among turtles, with only three known survivors in the world, including Suzhou Zoo 1 one, northern Vietnam 1 one (one turtle died in Fuxing Jianhu in 2065,438+06) and Changsha Zoo 1 one.

soft-shelled turtle

Trionyx sinensis is widely distributed in China, and it is produced in all provinces except Xinjiang, Tibet and Qinghai, especially in Hunan, Hubei, Jiangxi, Anhui and Jiangsu. Wu Huisheng reported that the red and white soft-shelled turtle was found in Hubei Province, which is a variety of Chinese soft-shelled turtle. Fossils of Trionyx sinensis were found in Pliocene strata of China.

Pearl turtle

Mainly distributed in the central and southern parts of the United States, it has been successfully cultivated in Guangdong and Guangxi, which were introduced into China.

Eriocheir sinensis

Guizhou, Yunnan, Guangdong, Hainan and Guangxi provinces. It is distributed all over Guangxi. Take 1978 as an example, Baise in Nanning accounts for 67.7% of the whole territory, Hechi and Liuzhou account for 27. 1%, Guilin, Yulin and Wuzhou are less, and foreign countries are distributed in Vietnam.

Because Guizhou is mountainous, the climate is very suitable for the growth of turtles, and the quality of turtles is very good. At present, the quality of soft-shelled turtles belonging to Fanjingshan system is the best, because Fanjingshan area is controlled by Southeast Asia Pacific monsoon and belongs to subtropical humid monsoon climate zone, which is significantly affected by Southeast Asian monsoon in summer and less affected by cold wave in winter.

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Living habits of soft-shelled turtle

Turtle is a warm-blooded animal. It breathes with its lungs. I like living in rivers, lakes and ponds. Often float to the surface, stretch out the tip of the kiss to breathe, and often bask in the back on land. Turtle is very sensitive to the change of external temperature, and its life style is closely related to the change of external temperature. 10- 12℃, the soft-shelled turtle enters the hibernation period, and the hibernation period of soft-shelled turtle in Hangjiahu area is from the middle of 1 1 year to the middle of April of the following year.

When the water temperature rises to about 15℃ in spring, people gradually wake up from hibernation and start eating. When the temperature is above 20℃, male and female turtles mate to lay eggs. Turtle has the habit of protecting eggs. After spawning, it will be guarded in the water not far from the spawning ground to prevent natural enemies from hurting it. 25-30℃ is the optimum temperature range for feeding and growth of Trionyx sinensis, and it is also the best season for artificial reproduction.

When the temperature exceeds 33℃, find a hole to "escape the heat". In artificial breeding, large and small turtles should not be mixed because of their aggressiveness. Bullying among groups is very common. When food is scarce, people will eat the same kind. The living habits of turtles can be summarized as "three joys and three fears", that is, they like quietness but fear shock, yang and wind, and clean and fear pollution. Turtle is very sensitive to the sound of its surroundings. As long as there is a slight movement around, the turtle can quickly dive into the bottom mud. ?

Baidu encyclopedia-tortoise