What kind of turtle is this? It looks ugly! It was found in Pingnan County, Guangxi.

English name: snapping turtle

Common name aliases: snapping turtle, snapping turtle, snapping turtle, snapping turtle.

Latin scientific name: Macroclemys temmincki.

Geographical distribution:

Habit:

Crocodile turtles live in rivers, lakes, ponds and swamps and feed on fish, waterfowl, snails, shrimps and water snakes. Crocodile turtles have outstanding predation ability. Whenever it finds a small animal drinking water by the water, it will suddenly swing its tail, stun its prey and drag it into the water to enjoy it slowly. Crocodile turtles rarely move on land. Only in the breeding season will females climb to the shore and choose a suitable place to lay their eggs. Can produce 30- 120 eggs at a time. After about 100 days, the young turtles can hatch. The growth rate of young turtles is amazing, and they can grow to 2 kilograms a year. Three years later, the baby turtle began to mature sexually.

Crocodile turtles were killed by humans, and now they are very rare in the wild, ranking sixth among the top ten endangered and rare wild animals in the world published by the World Wildlife Federation report.

Features:

The real crocodile turtle looks like a crocodile and is a combination of a turtle and a crocodile, so it is called a real crocodile turtle. Its head is so thick that it can't be completely retracted into the shell.

True crocodile turtle

The neck is short and thick, with brown spines on the back of the neck, small eyes, a small jaw on the mouth, a snout, a long tail, edges on both sides, sharp spines on the edges, and scales and ridges on the first two thirds of the back of the tail, which are serrated. The dorsal shell is thin, and the epithelium is mainly brown, occasionally brown. There are three fuzzy edges with radial stripes on the back and teeth on the back edge.

Body size:

Giant snapping turtles are huge. Adult tortoiseshell is 0.4-0.7m long and weighs 45-75kg. The largest can reach 200 kilograms, with a body length of 0.75-0.9 meters.

Breeding mode:

Crocodile turtles that lay eggs reach adulthood after 1 1- 13 years. The male turtle is bigger than the female turtle (as opposed to other turtles). Female turtles lay eggs in April-June, with 0/6-50 per nest. The eggshell is hard, the hatched larvae are about 1.7 inches, and the tail is longer than the body.

Feeding habits:

Crocodile turtles mainly eat live food that automatically swims into its upper and lower beaks. But crocodiles also eat any meat, such as fish, beef, chicken and commercial turtle feed. Clear and warm water should be provided for snapping turtles.

Real crocodile turtles (5 pieces)

Feeding difficulties:

It is understood that only female turtles leave the water when laying eggs. The tongue of the snapping turtle has a unique pink structure.

True crocodile turtle

Like a worm. They will lie quietly at the bottom of the water, with their mouths open and shaking their "bait" to attract their prey. They will also eat anything that can be caught and swallowed, including other turtles. There was once a man who was imprisoned for more than 60 years.

Feeding:

Crocodile turtles mainly eat live food that automatically swims into its upper and lower beaks. But crocodiles also eat any meat, such as fish, beef, chicken and commercial turtle feed. Clear and warm water should be provided for snapping turtles.

Behavior:

I like to live in a place with slow water, where there are many fallen trees to hide. I like to live underwater and open my mouth to attract fish. When hunting, it doesn't move as fast as a small snapping turtle, but waits with its mouth open, just turning its head and waiting for the target to enter the range and swallow it. Crocodile turtles are highly aquatic animals and never leave water to dry their shells.

Male and female identification:

The male has a large figure and a long tail, which is 86% of the length of the abdominal nail. The cloaca is located outside the edge of the dorsal nail. On the other hand, the female has a short tail, the length of which is less than 86% of the length of the bellybutton, and the cloaca is located in the edge of the carapace.

Reproductive habits:

Crocodile turtles reach adulthood after 1 1- 13 years. The male turtle is bigger than the female turtle (as opposed to other turtles). Female turtles lay eggs in April-June, with 0/6-50 per nest. The eggshell is hard, and the hatched larvae are about 1. 7 inches, its tail is longer than its body.

Mating from April to September every year, with May-165438+10 as the spawning period and June as the peak season. There are 1 1-83 eggs in each nest, generally 20-30 eggs. Egg white, spherical, slightly rough in appearance, with a diameter of 23-33 mm, a weight of 7- 15 g, and an incubation time of 55- 125 days. The hatching days of young turtles are different in different incubation environments. When the incubation temperature is above 30℃, the young turtle is female below 20℃, and when the incubation temperature is between 22℃ and 28℃, the young turtle is male. The young turtle weighs 9.5- 12g, the carapace is 24-30mm long, the carapace is round and black, and there are protrusions on each shield.

Edit this passage about carnivores.

Adult true crocodile turtle

True snapping turtles, also known as big snapping turtles, snapping turtles and biting snapping turtles, are only found in the Mississippi River valley in North America. It is one of the most famous snapping turtles in the world. It keeps the characteristics of the primitive turtle, and its mouth, carapace shield and red tongue are all strange. The upper and lower jaws at the front end of the mouth are hooked, like an eagle's mouth, sharp enough to bite off people's fingers. The shields of the carapace are brown, and the shields of 13 rise and fall like 13 hills, and are arranged in three rows. There are many serrated protrusions on the edge of the shell, eyes on both sides of the mouth, small and divine, and many fleshy protrusions on the head and neck. Its tongue has a bright red worm-like fleshy protuberance, which is connected with the tongue through the annular muscle in the middle. Both ends can expand and contract freely. Its tail is thin and long, as hard as Strafe's. Unlike other turtles, its head and feet can't be retracted into the shell.

Crocodile turtles are large, with a shell of about 365,438+0 inches and a weight of 200 pounds. It has a strange appearance, and is now on the verge of extinction due to over-capture and trafficking. According to the report of the World Wildlife Federation, among the endangered and rare creatures in the world, the snapping turtle ranks sixth (the top ten are: 1. Black rhinoceros, 2. Giant panda, 3. Southeast Asian tiger, 4. Little crocodile, 5. Golden clover, 6. Crocodile turtle, 7. Tortoise, 8. Peach blossom with big leaves. North American snapping turtle has long been one of the important members of the red book list of endangered wildlife protection in the world.

Editor's Note: Crocodile turtle is a rare new species introduced to China from the United States in recent years. Crocodile turtles are famous for their strong and fleshy bodies, so they are also called meat turtles. It is the largest and rarest freshwater meat turtle in the world. Crocodile turtles have the characteristics of high meat yield, rich nutrition, fast growth and high economic benefits. The meat yield is 85-89%, which is 1.5 times that of common soft-shelled turtle. It has the highest meat yield in the world, and its meat tastes delicious, even a few thousand yuan per kilogram of golden turtles are not as good as it, and it is crisp and tender without peculiar smell. Crocodile turtle meat is a kind of advanced natural nutritious food with high protein, high amino acid, low fat, low cholesterol and low calorie. It can dredge channels and collaterals, help yang, tonify yin and blood, and benefit qi. It is a good product for people with chronic illness, postpartum tonic, weakness of men and women, anemia, insomnia and brain decline. Tortoise shell has the functions of detumescence and cancer treatment. Turtle blood and glans penis also have medicinal value. The back shell is a natural handicraft, and multiple turtle shells can be synthesized into unique and exquisite handicrafts. The economic value of snapping turtle can be compared with that of ostrich. In the United States, ostrich meat is $0/00 per kilogram, and crocodile turtle meat can reach $0/50-180 per kilogram. It has high edible, medicinal and ornamental value.

Edit crocodile breeding in this paragraph I. Feeding methods

1, feeding:

Feeding: in nature

True crocodile turtle

Under certain conditions, feed it once a day in early spring and early winter, and feed it when the temperature is high at noon. Spring to late autumn is the feeding season for soft-shelled turtles, which are fed twice a day, 9 ~ 10 and 4 ~ 5 pm, accounting for 40% of the total feeding in the morning and 60% in the afternoon. Feed should be placed on the slope or in the corner of the pond, or a board can be placed under the water surface of the slope for feeding. Once you feed in a fixed place, don't change it frequently, and put the feed at 90 ~ 65438.

There are many kinds of feed, and compound feed is also acceptable. But it should be noted that the big ones should be cut into small pieces, the hard ones should be softened with water, and they can be eaten raw and cooked. Young turtles should be fed more nutritious feed and cut into small pieces as much as possible to facilitate digestion. Don't feed spoiled feed. You can also properly mix some plant feeds, such as melons and fruits.

2. Environment:

(1) Graded and divided into ponds, each square meter can be stocked with L groups (1 male and female) or 3 groups of medium turtles or 5 groups to 10 groups of young turtles or 10 groups to 20 groups of young turtles, which can be raised in different ponds according to the size and cannot be mixed, so as not to affect the growth of young turtles.

(2) Fixed-point, fixed-time and quantitative feeding: at noon every day in early spring and early winter 1 time, and the feeding season is from late spring to late autumn, with feeding twice a day at 9: 40 am and 60% at night. Feeding should be fixed in one place, and the dropped food should be eaten within 1.5 hours. If you haven't finished eating, you can eat less next time, and the food will be big. The feed is mainly animal feed, which can be properly matched with some plant flowers and fruit and vegetable feed, and can also be fed with turtle feed.

(3) Change the water regularly in ponds with large disinfection area, 20 days, 20d~ 50d days 1 time, and small ponds with 2 to 3 days or 6 to 7 days 1 time. The transparency is kept at 10ppm ~ 2 cm. In winter, change the water as little as possible according to the situation, but change the water in time for pots and pans. Generally, the pool water is 20 days, 20 days 20d~ 30d days 1 time.

(4) In summer, the pool water must be 80cm, and the pool water should be shaded above 1/5. Some duckweeds should be raised in the pool and trees should be planted around it. If necessary, fresh water should be injected to cool down so that the water temperature does not exceed 45℃.

3. Reproduction and incubation

Wild snapping turtles began to lay eggs in the third year, and captive snapping turtles began to lay eggs when they were 18 months old or grew to 1kg or above. April-May and 9- 10 naturally mate, and May-August is the peak of spawning. Female turtles lay eggs at night, 30 ~ 120 eggs a year, divided into 3 ~ 4 batches, with 8 ~ 50 eggs in each batch. Incubation method: The incubator is 20cm high, 50cm wide and 70cm long. Drill a few leaking holes in the bottom of the incubator, put 5cm thick sand and 5cm fine sand, put the eggs on the sand (the animals with white spots face up), cover with 5cm fine sand, and then cover with rodents and snakes. Used coarse sand and fine sand are disinfected by scalding with boiling water. Check the eggs once a day. If the surface sand is dry, it should be moistened with water, and it is advisable to hold the sand in your hand and let it develop naturally. At the natural temperature of 65d~75d, the hatchability of young turtles can reach 93% ~ 96%. If the temperature is 30℃ and the relative humidity is 80% ~ 90%, the hatching rate can reach 98% after 50 days to 60 days. After the young turtles hatch, let them move in the incubator for 5 minutes and last for several hours. When umbilical cords fall off, transfer them to 200ppm potassium permanganate solution for disinfection for 5 minutes.

4. Special care in summer and winter

In summer, the temperature is high. In some areas, the outdoor temperature exceeds 40℃, the surface temperature exceeds 60℃, and the water surface temperature exceeds 45℃. At this time, it is necessary to deepen the pool water, never less than 30 cm, cover the open-air pool by more than one fifth, or stock duckweed plants in the pool to cool down. You can also plant some fruit trees beside the pool. Try to keep the water temperature below 43℃.

Crocodile turtle has strong adaptability, belongs to a temperature-changing animal, can tolerate high and low temperatures, and can survive in water temperature of 5℃ ~ 43℃, but it is most active at 23℃ ~ 38℃ and grows fastest at 28℃ ~ 3L℃. Hibernation activity is less below 15℃, and all hibernate below 13℃. According to the experiment,

Second, contact with snapping turtles.

Be careful when touching the snapping turtle. The snapping turtle usually looks quiet, but if it approaches or tries to catch it, it will become aggressive. When a snapping turtle bites, its head can stretch to half the length of its shell. The upper and lower jaws of snapping turtles are very strong, and once they bite something, they won't let go easily (if your finger is bitten but not broken, you'd better put it back into the water quickly, and it may decide to run away or let you go). Records show that a 6-inch snapping turtle can easily tear your skin. An adult snapping turtle will bite off one or two of your fingers.

1. How to catch the giant snapping turtle seedlings?

You can arrest him any way you want. Remember: most of the giant snapping turtle seedlings are gentle at this time, but some of them are full of wildness. Be careful, because they grow fast and will bite you soon.

2. How to catch the young snapping turtle?

You can easily pick up a baby snapping turtle with one hand. Hold the tortoise's shell with your forefinger and middle finger, and put the tail in.

3. How to catch the medium-sized snapping turtle?

Crocodile turtles can be easily controlled with any finger. Similarly, you can hold its tail with your forefinger and middle finger.

4. How to catch large snapping turtles?

Considering its weight and strength, it is necessary to invite experienced people to catch large snapping turtles. You can hold the edge of the big snapping turtle with both hands-that is, the edge of the back nail-especially if you are familiar with the big snapping turtle. Sometimes this may be the only way to catch large or oversized snapping turtles, especially those whose shells are covered with algae. Pay special attention when grasping: don't lift it too far from the ground. The snapping turtle's powerful legs will push your hand away and escape you easily, but if you hold it too tightly, you may hurt it.

Various data show that it is also a safe way to catch the tail of snapping turtle. But it may be safe for people, but it may not be safe for crocodiles. It is not recommended to catch the tails of those large and small snapping turtles. In this way, the tail vertebrae of snapping turtles may be seriously injured. Besides, the big snapping turtle will probably turn around and bite you in order to escape!

Three, crocodile turtle breeding technology

1, Guitang Construction

Choose a quiet place with convenient water source, no pollution and convenient transportation to build the pool. Its shape is suitable for cement plastering ponds with rectangular arc angles in the east-west direction or earth ponds with the same shape but with external escape walls, and each pond covers an area of tens to hundreds of square meters; Pool depth 1.2m ~ 1.5m, water depth 30cm ~ 80cm. The slope of the bottom of the pond is 10 ~ 16 from north to south, and the lowest part is provided with a drainage pipe with an escape prevention net cover; The pool angle is smooth and arc-shaped, and it is covered with an escape prevention plate; There is an escape wall around Guitang, which is 1 m high. A door is left on one side of the wall, and an escape prevention plate (T-shaped escape prevention wall) can be added on the top of the wall. A jack with a diameter of 2 cm ~ 3 cm should be set at the top of the peripheral escape wall every 0.6 m or so. Several overflow holes are reserved on the highest water level line of the outdoor cement pool wall. There are alkaline substances in the newly-built cement pool. The wall and bottom of the pond can be scrubbed with 10% glacial acetic acid, and then soaked with water for 1 ~ 2 days. After release, the alkali can be eliminated again in the same way, and then washed with clean water and injected with new water. Before raising soft-shelled turtles, the whole pond was sprayed with15×10-6 ~ 20×10-6 bleaching powder or 1× 10-6 "strong chlorine essence" for disinfection, and it could be released after two days.

In order to prevent heatstroke, increase shelter and purify water quality, plants such as water peanuts and water hyacinths should be planted in the pool, and the area should not exceed1/4 ~1/3 of the total area of the pool; You can also set up scaffolding and use climbing plants to shade the sun to form an artificial bionic green environment.

In addition to the above general conditions, it is an important measure to artificially create the best growth temperature for snapping turtles. At low temperature, the water (gas) of the smokeless boiler is heated to keep the turtle pond water at about 30℃ and the air temperature at about 365438 0℃; Using automatic temperature controller and electric heating device can also realize constant temperature intensified feeding.

2. Crocodile turtles breed

Wild snapping turtles reach adulthood after 1 1- 13 years. The male turtle is bigger than the female turtle (contrary to other turtles), and the female turtle lays eggs from April to June, with 16-50 per nest. The eggshell is hard, and the hatched larvae are about 1. 7 inches, its tail is longer than its body. The mating season of snapping turtles is from April to September every year, and male turtles often climb on the back of female turtles. At first, the female turtle crawled, the male turtle slipped down and climbed up again, and so on until the female turtle stopped crawling. The male turtle pushes the ground with his hind legs, and his front paws hook the shell of the female turtle. When mating, the male turtle's head and neck are straight, swinging from side to side, and sometimes the nostrils of the two turtles are opposite. May ~ 165438+ 10 is the spawning season, and June is the spawning peak. The female turtle climbs to the shore, looking for open land, usually about 200 meters above the water. The hole dug by the tortoise has a big mouth and a small bottom, and extends downward at a certain arc. The hole depth is 10 ~ 13 cm, and the hole size varies with the turtle's body shape. Each nest has 1 1 ~ 83 eggs, generally 20 ~ 30 eggs, and larger females lay more eggs. Eggs are white, spherical and slightly rough in appearance, with a diameter of 23-33 mm and a weight of 7- 15g. Natural incubation takes 85-90 days [1]. The days of incubation in different environments are different. When the incubation temperature is above 30℃ and below 20℃, the young turtle is female. When the incubation temperature is 22 ~ 28℃, the young turtle is male. The young turtle weighs 9.5 ~ 12g, the carapace is 24 ~ 3 1mm long, the carapace is slightly round black, there are protrusions on each shield, and the rear edge of the carapace is serrated.

In artificial breeding, healthy adult turtles with the age of 10 and the shell of more than 40cm are generally selected as breeding turtles. At present, some professional farms in China have achieved large-scale artificial reproduction, so the so-called "imported crocodile seedlings" on the market have a lot of water. [2]

3. Factory turtle farming

After the end of the temporary rearing period, the young turtles enter the stage of industrial reproduction. At present, it is mainly through the technical means of automatic temperature control in the factory to put young turtles in the best environment, accelerate the growth rate and shorten the breeding cycle. After the young turtles hatch in batches, they gradually enter winter. Under natural conditions, young turtles are too poor to survive the winter, resulting in many deaths. Under artificial conditions, given the best temperature and complete feed, and taking necessary ecological control measures, young turtles can be raised in the greenhouse in winter and spring, and the specifications can reach about 500 g. When the temperature rises in summer, they will be moved out of the greenhouse and raised in an open-air pond in the natural environment, and in a few months they will grow into commercial turtles of1500 g. Practice has proved that the growth of young turtles is slow, and the growth rate of snapping turtles is accelerated when they reach more than 250 grams. When the size reaches 500 grams, it grows faster when it is moved to the outdoor feeding stage, with an average weight gain of 200 grams per month, which is amazing. In other words, it only takes 1 year for the snapping turtle to grow from about 7g to1.500g.. If cultured at natural temperature, not only the survival rate is low, but also it takes three years to reach the specification of 1.500g commercial turtle. Therefore, industrialized breeding of snapping turtles can shorten the breeding cycle by 2 years. The market is ever-changing, and early output is beneficial to seize opportunities, reduce unit costs and improve competitiveness.

Basic points of industrialized culture of snapping turtles;

(1) greenhouse construction. Adopting energy-saving greenhouse not only saves investment, but also saves heat energy after improving thermal insulation performance. The method of using two layers of film to sandwich insulation materials on the roof and four walls to sandwich insulation materials, paying special attention to the indoor ground must be paved with insulation materials, so as to ensure the insulation and energy-saving effect of the greenhouse. In fact, the principle of building a turtle greenhouse is the same as that of building a cold storage, and the insulation effect should be ensured.

(2) Temperature control device. Advanced patented technology can be used in both small and large greenhouses. The automatic hot water circulation energy-saving heating device for soft-shelled turtle greenhouse has obtained the patent certificate issued by China National Intellectual Property Administration with the patent number ZL 0 12 17344.4. The biggest feature of this patent is that anthracite is used to automatically heat the air in the greenhouse and the water in the regulating pool. The key is the automatic circulation of hot water to ensure the need of isothermal water change. The daily coal consumption is only 500 grams per square meter, and the energy saving effect is remarkable.

(3) Oxygen increasing equipment. Greenhouse is characterized by high temperature, high density and high pollution. Aerobic treatment is helpful to improve water quality, help organic matter decompose and reduce pollution. Generally, every 500 square meters of greenhouse is equipped with a 2.2 kW aerator.

(4) The water inlet and outlet system and the bottom of the pond should have a certain inclination, which is the same as the outdoor turtle pond construction requirements. It is simple and feasible to insert a PVC pipe with a diameter of 10cm into the drainage pipe to stop water and draw out the drainage.

(5) the setting of the dining table. Put asbestos shingles into the turtle pond obliquely, 65,438+0/3 underwater and 2/3 water surface. Feeding begins under the table and gradually moves to the water for feeding, which is beneficial to observe the feeding situation and reduce the residual bait.

(6) disinfection and disease prevention. After being diluted with quicklime slurry regularly, it spills all over the pond, and the turtle water is automatically disinfected regularly with advanced ozone generator, which has good effect and low cost.

(7) Feed distribution. It is best to make your own feed, buy a small feed production unit and use advanced feed formula. The basic components of crocodile turtle feed are white fish meal, α-starch, plant protein, minerals, vitamins, probiotics and prebiotics. Other green feed additives can be added to promote the growth of crocodile turtles, reduce the occurrence of nutritional diseases and improve the survival rate of culture.

(8) Feeding management. Young snapping turtles are fed with compound feed during the growing period. If it is powdery feed, add water, corn oil and fish oil to make soft particles or balls and put them on the dining table. If the cultured species is the snapping turtle, the puffed feed floating on the water surface is fed to form power bait to lure the inactive snapping turtle to swallow. Feed it twice a day, and the amount of each feed should basically be eaten within 2 hours, leaving only a little. When the water quality changes and the ammonia concentration is high, change the water in time. Conditional turtle farms can use classical hydrochemical analysis methods or modern instruments to automatically detect water quality, and can use computer monitoring methods to track and observe the activities of snapping turtles in greenhouses, and take immediate measures when problems are found. Modern technology has realized automatic test, automatic water change, automatic analysis and automatic alarm. During the feeding process, special attention should be paid to "isothermal water exchange". When the young turtles are moved from outdoor to indoor, the temperature should be gradually raised, and when the young turtles are moved outdoors, the temperature should be gradually lowered, and the temperature balance should be paid attention to. Always remember the word 12 in the whole process of breeding: "environmental regulation, structural regulation and biological regulation", and savor it carefully.

4. Turtle culture

Adopting high-density green culture is a new technology to obtain high benefits, and it is also an inevitable trend of turtle industry development. Its initial stocking density (about 200g/ animal) is 24 ~ 27 animals /m2, and it should be about 5kg/m2 by weight. But with the rapid growth of snapping turtles, attention should be paid to reducing the density in time. When the average specification reaches 350g/piece to 400g/piece, it should be reduced to 20 pieces/square meter to 22 pieces/square meter; When the average scale reaches 500g/ head, it can be stocked at 15 heads /m2 ~ 17 heads /m2; 600g/ piece, stocking at 12 pieces /m2 ~ 14 pieces /m2; 700g/ hour should be 10 /m2 ~ 12/m2; 800g/ hour is 8-9 pieces /m2.

5. Feed feeding

It is suggested that snapping turtles use SDG special green compound feed (protein content is above 48%). During preparation, the ingredients are weighed on site, and 5% ~ 10% photosynthetic bacteria and 45% clear water are added to make long particles with a particle size of 2 mm ~ 3 mm If possible, it can be made into floating puffed granular feed with better effect.

The feeding amount of compound feed is 1.5% ~ 2.5% of the total weight of snapping turtles, and 5% ~ 10% of fresh feed. Feed it three times a day at 6: 00 ~ 7: 00, 12 ~ 13, 17 ~ 18 respectively. Feed more evenly and try to make the feed make a sound when it enters the water. Don't concentrate on one place and cause piles of feed. The number of feed tables in each pool should be determined according to the size of the pool, generally 3 ~ 4 per square meter.

6. Water quality regulation

In view of the large intake and excreta of soft-shelled turtle, and the high water temperature under the condition of intensive high-density culture, even if the feed is green, it will pollute the water body faster, and more harmful substances, especially ammoniated nitrite and hydrogen sulfide, are easily produced in the water. By spraying and applying photosynthetic bacteria at the bottom, water quality can be effectively improved and harmful substances can be reduced. Every time the new pond is filled with water, photosynthetic bacteria are applied simultaneously:10×10-6 ~15×10-6; Changing water is also an effective way to adjust water quality. The water depth of about 20 cm can be changed once a day, and the water depth of 30 cm can be changed once every two days. Don't change the water for a few days, and don't let it stink. Sprinkle quicklime once every 7 days to 10, and the concentration is 70× 10-6. Pay attention to cross application with photosynthetic bacteria, not at the same time.

7. Water temperature control

The scientific control of water temperature directly affects the weight gain and survival rate of adult turtle culture. Under the condition of 65,438+08℃ ~ 20℃, the long-term growth rate of snapping turtle is several times slower than the optimum growth water temperature of 30℃ ~ 365,438+0℃. Therefore, the water temperature for raising soft-shelled turtle must be kept between 30℃ and 365438 0℃. On the other hand, when the turtle pond that is changing water or exposed to the outside encounters bad weather such as heavy rain or sudden change of temperature, preventive measures should be taken in time to avoid water temperature fluctuation greater than 2℃ as far as possible.

8. Disease control

Crocodile turtles are generally mild, but they are prone to indigestion under high-density culture conditions. Sick turtles can be fed with drug bait containing multi-enzyme tablets (2 tablets per kilogram of turtles). Traumatic diseases can be disinfected with iodine tincture cotton wool and cured in 2 ~ 4 days after applying Xiaoyan Shengji ointment.

The market prospect of this paragraph is edited. It is not long since snapping turtles were introduced to China from abroad. According to preliminary statistics, the total number of imported turtles so far is about 60 thousand, of which more than 95% are small snapping turtles. International protection of large snapping turtles, small snapping turtles do not have, can be vigorously developed. Are you satisfied with the current import volume?

Atlas of True Crocodile Turtles (five)

In order to meet the demand of our country, it is still in the development stage of snapping turtle seedlings, which is characterized by short supply and high price. It is estimated that after two years, crocodile turtle breeding will enter the commodity stage, and a large number of commercial crocodile turtles will enter the market, which is no longer limited to hotel consumption. Mass consumption will promote the faster development of snapping turtle production. When snapping turtles become an industry, the output of snapping turtles will continue to increase. After about five years, it will enter the stage of flat profit, and further development will enter the era of low profit. Only by improving the scientific and technological content can we have a place in the market. According to industry analysis, the crocodile turtle breeding project will not be eliminated within 10 years.

On the other hand, the unique flavor of snapping turtles has been recognized by pioneers in economically developed areas. After tasting the snapping turtle, everyone agreed that the snapping turtle was really delicious, with no peculiar smell, earthy smell and strange smell, which was better than the turtle's skirt. Crocodile turtles have crisp meat and much less fat than ordinary turtles. In Zhejiang, the author dissected a small snapping turtle, a 3.4kg snapping turtle. After bloodletting, the carapace, carapace and a little fat are removed, and the rest are almost pure lean meat. After weighing 2kg, the pure meat rate is 58.8%, so snapping turtles are also called meat turtles. The possible problem in the future is that it will be difficult for ordinary consumers to accept when the super-large snapping turtle is fully listed in the future. Therefore, it is advisable to control the market specification of cultured snapping turtles below 1500g as far as possible, and oversized snapping turtles can be divided into small packages and further processed to meet multi-level needs. When I visited Shenzhen, I found that the restaurants in Shenzhen have very strict specifications for snapping turtles. They welcome the specification of1.500g, and are very particular about the cooking methods of snapping turtles. There are eight cooking methods.

Edit the identification method in this paragraph. Beginners must prevent being cheated when buying crocodiles! It's easy to confuse predators with crocodiles because they haven't been exposed to them! The prices of small crocodiles and crocodiles are also very different! Small crocodiles are cheaper, and the price of crocodiles is about twice that of small crocodiles.

1. Judging from the carapace, the carapace of the alligator is round, with small protrusions on it! The crocodile's carapace is rectangular with high bumps on it! You can see it from the time of seedling raising!

2. Distinguish from the underside of the stomach: the belly surface of the small crocodile is relatively smooth (as are the limbs), while the crocodile is relatively thick (including small thorns in the limbs)!

3. Distinguish from the head: the head of the small crocodile is round, and the head of the crocodile is pointed (it was not easy to find when I was a child). Crocodile's nose is short, crocodile's nose is long (compare carefully when you are young!

Edit the appearance characteristics of this paragraph.

True crocodile turtle

The real snapping turtle is larger, with a shell of about 365,438+0 inches and a weight of 200 pounds. The shields of the carapace are brown, and the shields of 13 rise and fall like 13 hills, and are arranged in three rows. There are many serrated protrusions on the edge of the shell, eyes on both sides of the mouth, small and divine, and many fleshy protrusions on the head and neck. Its tongue has a bright red, forked worm-like fleshy protuberance, which is connected with the tongue through the annular muscle in the middle. Both ends can expand and contract freely. Its tail is thin and long, as hard as Strafe's. Unlike other turtles, its head and feet can't be retracted into the shell.

geographical distribution