Manual collection and incubation of snapping eggs

The Snapping Tortoise originated in North America. After its introduction in China, it was first farmed successfully in Guangdong and Zhejiang. According to the technical personnel of the leading museum of amphibious reptiles in Haining City, Zhejiang Province, which is subject to experimental breeding tasks, from the point of view of the reproduction of experimental breeding, the snapping turtles have fast growth, high meat yield, and large number of eggs in comparison with Chinese turtles. Features. However, Snapping Turtles have certain requirements in 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 June to September is the spawning period of snapping turtles, so pay attention to the turtle eggs.
1. Snapping Turtles spawn at the beach during the day (spawning pit 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 snapping eggs are laid, the internal embryos have been fixed, and the boundary between the animal pole (white circle) and the plant pole (yellow) is obvious. This is the timing of egg harvest. Considering that the snapping turtles lay their eggs mainly in the morning, they usually collect 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 20 cm long, 2 cm wide, and 0.3 cm thick should be prepared. One is a tool for hole-drilling and the other is made into an egg-clamping clip with two ends bent.
3. Before harvesting eggs, clean the egg retrieval tools and boxes first. After the egg-collecting staff put on the clean shoes and enter the spawning ground, according to the mark that was made yesterday and the date on the bricks, the eggs that will be over 24 hours after delivery will be laid. Picking back. When picking, single-handedly use bamboo to dial the sand to find the ovary, and then use a bamboo clip to take the eggs. When taking the eggs, attention should be paid to the egg's fertilization status. The egg shells have 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. Don't store them for too long. Don't bask in the sun. Collect the eggs in the egg box and pay attention to moisturizing. Use wet towels to cover them.
Second, hatching Snapping turtle eggs Because of 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, incubation period can be shortened to 42 Days ~ 48 days, the hatching rate can reach 94% to 98%.
1. Using a foam box, drill a leak hole in the bottom of the box, then lay 3cm thick coarse sand (0.3cm to 0.5cm in diameter), and then lay 2cm thick sand (0.1cm to 0.2cm in diameter) on the top floor. 2 cm thick sand (0.5 mm to 0.8 mm in diameter). Place the turtle 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 sand.
2. Move the incubator box containing turtle eggs into the incubator room. The air humidity is preferably controlled between 81% and 85%. The moisture content of the sand is controlled by the hand and it is loosened. The temperature is controlled at 28°C. Between 31°C, the optimal temperature is 30°C. Check the humidity of the sand every day. If the sand on the surface is whitish, it means that it is too dry. You can use spray bottle to spray proper amount of water on the sand. The conditions can be used 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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