Snapping turtle egg collection and hatching
2019-07-27 22:02:07
The snapping turtle is native to North America and was introduced to China in 1996. It was first farmed successfully in Guangdong and Zhejiang. According to the technicians of the famous animal breeding farm in Yuanhua Town, Haining City, Zhejiang Province, who was subjected to the experimental breeding task, from the point of view of the breeding conditions for 5 years, the snapping turtles have fast growth, high meat yield, and large amount of eggs in comparison with Chinese turtles. Features. Snapping turtles have certain requirements for the management and collection of turtle eggs and hatching techniques. The specific methods are as follows:
First, the collection of snapping turtle eggs in the spring and autumn each year, when the water temperature above 22 °C, snapping turtles began to mate, from early June to mid-August is the spawning period of snapping turtles. Therefore, pay attention to the turtle eggs.
1 Snapping turtles lay eggs on the beach during the day (spawning grounds for sand pits). Unlike China's turtle species, Chinese turtles often spawn at night. Snapping turtles spawn mostly in the morning. Female turtles are good at crawling to spawning grounds, and the range of activities is about 200 square meters, which inconveniences the collection of turtle eggs. In order to accurately find turtle eggs and avoid disturbing egg-laying turtles, the breeder should stand at a distance to observe their egg-laying points during the day. If there is no shade in the field, set observation points. Use a telescope to observe the female turtles in the distance. After the end of spawning, mark it in the past. It is best to press a brick on the ovary. The date is written on the brick with chalk. The brick can prevent the female eggs from getting out of the first generation eggs when they dig the ovum later. When marked, it is convenient to take eggs 24 hours later. Snapping turtles are oval, white in color, and resemble turtle eggs, but are about twice as large as turtle eggs. 24 hours after the laying down of the snapping turtle eggs, the internal embryos have been fixed and the boundaries between the animal poles (white dots) and the plant poles (yellow) are clearly marked. This is the timing for harvesting eggs. Considering that the snapping turtles mainly lay eggs in the morning, the field often takes eggs at 2 to 3 o'clock on the second day.
2 Prepare a wooden harvesting box. The collection box is 50 cm long, 35 cm wide, and 10 cm high. A portable ring is placed on the box. Draw several filter holes at the bottom of the box. At the time of egg collection, a layer of fine sand is laid on the bottom of the box and the thickness is 2 cm. At the same time, two bamboo pieces measuring 20 centimeters long, 2 centimeters wide, and 0.3 centimeters thick should be prepared. One tool should be used to open the hole and remove the sand, and the other should be made into an egg grabbing clip with two ends bent.
3 Before the egg is collected, the egg-collecting tools and boxes should be cleaned first. The egg-collecting staff should put on the clean shoes and enter the spawning ground. According to the mark that was made yesterday and the date on the brick, the eggs that have been over 24 hours after delivery will be picked. Back. When picking, single-handedly use bamboo to dial the sand to find the ovum, and then use a bamboo clip to retrieve the eggs. When taking the eggs, attention should be paid to the egg's fertilization status. The egg shell has white spots, the edges are clear and sleek, and the eggs are fresh and shelled. Pink or milky white, large and round, which is a well-developed egg; on the contrary, if there is no white dot animal pole outside the egg shell, it is an unfertilized egg or a poorly fertilized egg. Poorly fertilized eggs, deformed eggs and broken eggs should be excluded. After hatching eggs, hatch them in time. Do not store them for too long. Do not bask in the sun. The turtles collected in the egg collection box should pay attention to moisturizing, and should be covered with a wet towel.
Second, the hatching snapping turtle eggs due to large snapping turtle eggs, thick shell, in natural conditions incubation time up to 60 days to 80 days, hatching rate of only about 85%, and the use of artificial hatchery facilities, the incubation period can be shortened to 42 Days -48 days, the hatching rate can reach 94% to 98%.
1Use foam calcium plastic box, drill leak hole on the bottom of the box, then spread 3 cm coarse sand (0.3 cm to 0.5 cm in diameter), then lay 2 cm thick medium sand (0.1 cm to 0.2 cm in diameter), and lay on the top floor. 2 cm thick sand (0.5 mm to 0.8 mm in diameter). Place the eggs on the third layer of fine sand. The white spots of the eggs are extremely upward. Each egg is 3 cm apart, and then the eggs are covered with 3 cm thick fine sand.
2 The incubator with turtle eggs is moved into the incubator. The air humidity is preferably controlled between 81% and 85%. The moisture content of the sand is controlled by the hand and the looseness is controlled. The temperature is controlled at 28°C to 31°C. Between °C, the optimal temperature is 30°C. Check the humidity of the sand every day. If the sand on the surface is whitish, it indicates that it is too dry. You can use spray bottle to spray proper amount of water on the sand. Conditional use of electronic automatic thermostat temperature control, insulation between 29 °C ~ 31 °C, can improve hatching rate, shorten the incubation time and increase economic efficiency. Can also be adapted to local conditions, the use of factory waste heat, gas, kerosene lamp, geothermal, biogas, solar energy and other constant temperature incubation.
First, the collection of snapping turtle eggs in the spring and autumn each year, when the water temperature above 22 °C, snapping turtles began to mate, from early June to mid-August is the spawning period of snapping turtles. Therefore, pay attention to the turtle eggs.
1 Snapping turtles lay eggs on the beach during the day (spawning grounds for sand pits). Unlike China's turtle species, Chinese turtles often spawn at night. Snapping turtles spawn mostly in the morning. Female turtles are good at crawling to spawning grounds, and the range of activities is about 200 square meters, which inconveniences the collection of turtle eggs. In order to accurately find turtle eggs and avoid disturbing egg-laying turtles, the breeder should stand at a distance to observe their egg-laying points during the day. If there is no shade in the field, set observation points. Use a telescope to observe the female turtles in the distance. After the end of spawning, mark it in the past. It is best to press a brick on the ovary. The date is written on the brick with chalk. The brick can prevent the female eggs from getting out of the first generation eggs when they dig the ovum later. When marked, it is convenient to take eggs 24 hours later. Snapping turtles are oval, white in color, and resemble turtle eggs, but are about twice as large as turtle eggs. 24 hours after the laying down of the snapping turtle eggs, the internal embryos have been fixed and the boundaries between the animal poles (white dots) and the plant poles (yellow) are clearly marked. This is the timing for harvesting eggs. Considering that the snapping turtles mainly lay eggs in the morning, the field often takes eggs at 2 to 3 o'clock on the second day.
2 Prepare a wooden harvesting box. The collection box is 50 cm long, 35 cm wide, and 10 cm high. A portable ring is placed on the box. Draw several filter holes at the bottom of the box. At the time of egg collection, a layer of fine sand is laid on the bottom of the box and the thickness is 2 cm. At the same time, two bamboo pieces measuring 20 centimeters long, 2 centimeters wide, and 0.3 centimeters thick should be prepared. One tool should be used to open the hole and remove the sand, and the other should be made into an egg grabbing clip with two ends bent.
3 Before the egg is collected, the egg-collecting tools and boxes should be cleaned first. The egg-collecting staff should put on the clean shoes and enter the spawning ground. According to the mark that was made yesterday and the date on the brick, the eggs that have been over 24 hours after delivery will be picked. Back. When picking, single-handedly use bamboo to dial the sand to find the ovum, and then use a bamboo clip to retrieve the eggs. When taking the eggs, attention should be paid to the egg's fertilization status. The egg shell has white spots, the edges are clear and sleek, and the eggs are fresh and shelled. Pink or milky white, large and round, which is a well-developed egg; on the contrary, if there is no white dot animal pole outside the egg shell, it is an unfertilized egg or a poorly fertilized egg. Poorly fertilized eggs, deformed eggs and broken eggs should be excluded. After hatching eggs, hatch them in time. Do not store them for too long. Do not bask in the sun. The turtles collected in the egg collection box should pay attention to moisturizing, and should be covered with a wet towel.
Second, the hatching snapping turtle eggs due to large snapping turtle eggs, thick shell, in natural conditions incubation time up to 60 days to 80 days, hatching rate of only about 85%, and the use of artificial hatchery facilities, the incubation period can be shortened to 42 Days -48 days, the hatching rate can reach 94% to 98%.
1Use foam calcium plastic box, drill leak hole on the bottom of the box, then spread 3 cm coarse sand (0.3 cm to 0.5 cm in diameter), then lay 2 cm thick medium sand (0.1 cm to 0.2 cm in diameter), and lay on the top floor. 2 cm thick sand (0.5 mm to 0.8 mm in diameter). Place the eggs on the third layer of fine sand. The white spots of the eggs are extremely upward. Each egg is 3 cm apart, and then the eggs are covered with 3 cm thick fine sand.
2 The incubator with turtle eggs is moved into the incubator. The air humidity is preferably controlled between 81% and 85%. The moisture content of the sand is controlled by the hand and the looseness is controlled. The temperature is controlled at 28°C to 31°C. Between °C, the optimal temperature is 30°C. Check the humidity of the sand every day. If the sand on the surface is whitish, it indicates that it is too dry. You can use spray bottle to spray proper amount of water on the sand. Conditional use of electronic automatic thermostat temperature control, insulation between 29 °C ~ 31 °C, can improve hatching rate, shorten the incubation time and increase economic efficiency. Can also be adapted to local conditions, the use of factory waste heat, gas, kerosene lamp, geothermal, biogas, solar energy and other constant temperature incubation.
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