CATDOLL : CATDOLL: There are several species of soft-shelled turtles. How many years does it take for a 3-jin soft-shelled turtle to grow?

There are several species of soft-shelled turtles. How many years does it take for a 3-jin soft-shelled turtle to grow?

The common soft-shelled turtles in my country mainly include Chinese soft-shelled turtle, mountain soft-shelled turtle, spotted soft-shelled turtle, and cantorii. The Chinese soft-shelled turtle is about 30cm long, with a flat body and a roughly oval shape. The color of the surface is basically the same, without bright light spots. The head is thick, the front end is triangular, the snout is tubular, and the snout is equal to the diameter of the eye. The back shell is dark green or yellowish brown, and the belly shell is grayish white or yellowish white, and is relatively smooth. The limbs are flat, each with five toes, and there are webs between the toes.

1. How many species of soft-shelled turtle are there?

The most common species in my country include Chinese soft-shell turtle, mountain soft-shell turtle, giant soft-shell turtle, and cantorii. They are introduced as follows:

1. Chinese soft-shelled turtle

(1) The body length is about 30 cm, the body is flat and roughly oval, with carapaces on the back and abdomen; the whole body is covered with leathery skin, which is relatively soft and has no keratinous shields. The color of the surface is basically the same, without bright light spots. The head is thick, the front end is triangular, the tip of the snout is tubular, relatively long, with a long snout equal to the diameter of the eye. The eyes are located on both sides behind the nostrils, there are no teeth in the mouth, and the neck is cylindrical, thin and long, and can be stretched freely. The carapace on the back is dark green or yellowish brown, and the carapace on the abdomen is grayish white or yellowish white, and relatively smooth. The tail is short, the limbs are flat, each has five toes (the inner three toes have sharp claws), there are webs between the toes, and the hind limbs are more developed than the forelimbs.

(2) They usually live in rivers, lakes, ponds, reservoirs and other freshwater bodies with slow currents and abundant fish and shrimp.

2. Mountain softshell turtle

(1) The dorsal disc is about 118.5-315 mm long and 97.5-255 mm wide, and is generally oblong.

(2) The head is relatively large and the back is smooth; the front of the head is thin, the tip of the snout is prominent, and there is a snout protrusion (about 8.5-9mm long), and the nostrils are located at the top of the snout protrusion; the eyes are relatively small, and the distance between the two eye sockets is smaller than the orbital diameter (9.5mm); the upper jaw protrudes from the lower jaw, and both have fleshy lips. The lips on both sides of the upper jaw are separated and split in the middle, and the beak can be seen.

(3) The surface of the dorsal disc is covered with leathery skin, the front edge of which is turned back to form a well-developed marginal ridge with a row of large and protruding scrofula on it; there is a longitudinal ridge in the center of the dorsal disc, extending from the front end to the rear edge of the bony dorsal plate, with irregular nodules distributed on both sides (the nodules on the rear edge of the dorsal disc are large and dense).

(4) The surface of the abdomen is smooth. The upper abdominal plate is long and narrow, tangent to the inner abdominal plate (at an acute angle), while the two side branches of the inner abdominal plate point out to the rear. The lower corner of the sword abdominal plate is relatively round.

(5) The limbs are flat and round, with webbed toes and three claws.

(6) They usually live in the sand and mud of mountain streams, ditches, rivers, shallows, and ponds.

3. Yangtze giant softshell turtle

(1) The dorsal disc is about 36-57 cm long, the carapace is oblong, and the width of the dorsal disc is only slightly smaller than the length, and is generally circular.

(2) The body is flat and slightly raised. The back is smooth, shiny, dark olive, dotted with many yellow spots, and between the larger yellow spots, there are a large number of small yellow spots. Sometimes the small spots surround the large yellow spots, forming an irregular circle, and sometimes they form narrow lines. In the part equivalent to the bony carapace, the yellow spots form horizontal and vertical interlaced lines or radial patterns. The head, neck and back of the limbs are all black with irregular yellow spots, which is also one of the main characteristics of the Yangtze giant softshell turtle.

(3) The abdomen is gray, with only two rudimentary calluses on the union of the lingual plate and the lower plate.

(4) The skull is flat, broad and short, of medium size, with a short and round bony snout. The mandibular symphysis is narrower than the maximum orbital diameter and has no central ridge. The basesphenoid bone is connected to the palate, the yoke bone is in contact with the squamosal bone, and the first pair of ribs are separated by only one lamina. The eighth pair of ribs are degenerate and do not meet in the midline. 7-8 lamina form a continuous row. The lingual ventral plate is separated from the hypoventral plate and does not fuse. The anterior ventral plates are small and separated from each other, and there are webs between the toes.

(5) Usually lives in freshwater areas of the Yangtze River Basin and the Red River Basin.

4. Turtle

(1) It is the largest turtle species, with a body length of about 600m. It has a small head, a short and round snout that is less than half the diameter of the eye, and a nostril located at the tip of the snout. The back of the head is wide, flat and smooth, and the end of the tail exceeds the edge of the skirt.

(2) The back is flat and broadly round, the carapace is bony, the front edge is flat, the rear edge is slightly concave, and there are densely distributed concave patterns; there are 8 vertebral plates in total, the front 4 are hexagonal, the fifth vertebral plate is elliptical or sub-rectangular, the short sides of the back 3 are facing forward, and only the eighth vertebral plate is a small pentagon; there are 8 pairs of ribs in total, the eighth rib has no obvious degeneration, and except for the first and eighth ribs, the outer edges of the other ribs are larger than the inner edges, especially the second and seventh ribs; the upper ventral plate is smaller and not tangent to the left and right; the top of the inner ventral plate forms an acute angle or is connected.

(3) The back of the body is olive-colored with yellow spots, and the belly is white.

(4) They live mainly in inland, slow-flowing freshwater rivers and streams.

2. How many years does it take for a 3-jin turtle to grow?

1. The growth rate of the turtle depends on factors such as the species of the turtle, the gender of the turtle, and the richness of food.

2. If it is in the wild and there is enough food, it will take at least 5 years to grow to about 3 catties. If it is artificially bred, it will take about 3 years to grow to about 3 catties.

3. The growth rate of the Japanese species is about 20% faster than that of the Chinese soft-shelled turtle, and the pearl soft-shelled turtle is even faster.

4. When the body weight is between 100-300g, the female turtle grows faster than the male turtle; when it is between 300-400g, the growth rates of the two are basically similar; when it is between 400-500g, the male turtle grows faster than the female turtle; when it is between 500-700g, the male turtle grows almost twice as fast as the female turtle.

Introduction to soft-shelled turtles, their habits

Turtle is the common name for turtles. They are also called round fish and water fish. They are oviparous amphibians. There are many varieties of turtles. The common varieties in China include Chinese soft-shelled turtle, mountain soft-shelled turtle, and spotted soft-shelled turtle. Soft-shelled turtles are very useful. They can not only be used as delicacies on the table, but also as materials for medicine. Although soft-shelled turtles and turtles are similar, they are not the same species as turtles. Many people confuse soft-shelled turtles with turtles.

1. Introduction to soft-shelled turtles Soft-shelled turtles are animals of the order Testudinata, family Hydrocharitidae, and genus Trionyx. They are also called round fish and water fish. Soft-shelled turtles are amphibians that can live in water or on land. They cannot stay on land or in water for long. Soft-shelled turtles are different from turtles in that they have many uses. They can be eaten and used as medicine. Soft-shelled turtles and turtles look similar, but they are not the same animal, and there are also great differences in species.

2. Habits of soft-shelled turtles Soft-shelled turtles usually like to move in clean water, and often live in rivers, lakes, reservoirs, ponds and other waters with clean water. When the weather is fine, they will climb onto the rocks on the shore to bask in the sun. But when the wind is too strong, they will hide in the water. Moreover, soft-shelled turtles are also quite fierce, and when they live in groups, they often see the law of the jungle. However, they are relatively timid, and when there is a loud noise around them, they will quickly hide in the water.

In addition, turtles are temperature-changing animals. They are sensitive to changes in the environment. When the outside temperature is below 15℃, they will stop eating. They will also hibernate in the mud at the bottom of the water. The reproduction method of turtles is oviparous. When they give birth, they will first dig a hole, bury the eggs with sand after laying them, and use the natural environment to hatch them.