Construction of turtle pond
1. Juvenile turtle pond
Those who are just born to less than 10 grams are called young turtles. The area of the pool is 2 square meters ~ 8 square meters, rectangular, and the depth is 0.3 ~ 0.4 meters. The water depth is kept at 0.1 m ~ 0.15 m, the bottom of the pool is covered with fine sand, and the pool is covered with a shade canopy 1-1.5 m higher than the top of the pool. A rest table with a width of about 20 cm should be built at both ends. Build a 30 °slope at the intersection of the rest table and the water surface to facilitate its up and down.
two。 Juvenile turtle pond
The young soft-shelled turtle is called a soft-shelled turtle weighing about 10 ~ 100 grams. The area of the pool is 20 square meters ~ 200 square meters, the depth of the pool is 0.6 ~ 0.8 meters, the water depth is kept at 0.3 ~ 0.4 meters, the bottom of the pool is covered with fine sand 8 ~ 10 cm, and there are rest tables at both ends of the pool.
3. Adult turtle pond
A soft-shelled turtle weighs more than 100 grams. The area is 30 square meters ~ 300 square meters. Since individuals weighing 100g ~ 1500 g or more belong to adult soft-shelled turtles, several more ponds should be built and raised separately according to size. The depth of the pond is about 1.5 meters, the water depth is between 0.8 meters and 1.2 meters, and the bottom of the pool is covered with fine sand 5 centimeters thick.
4. Pro-turtle pond
The area is 50 square meters to 300 square meters, the pool depth is 1.6 meters, and the water depth is about 1.2 meters. The bottom of the pool is covered with 25 centimeters of fine sand, and spawning grounds are set on one side or around the pond, accounting for about 1/4 of the pool area and 20 centimeters above the water surface. The pool should be strong, anti-escape and leak-proof.
- Prev
Common Fish Drugs 3
Furans are synthetic broad-spectrum antibiotics, many kinds, but only 3~4 kinds are used to prevent and control aquatic diseases. The basic structure of furans is a furan ring with a nitro group attached to the fifth carbon atom. It has strong antibacterial effect. At low concentration, it can inhibit the biological reproduction of various Gram-positive bacteria and negative bacteria; at high concentration, it has bactericidal effect. General bacteria are not resistant to furans, even if they are resistant to sulfonamides and antibiotics.
- Next
Processing technology of canned belt fish smoked by oil immersion
(1) the fresh or frozen (thawed) belt fish will be finned, tailed and belly removed, the tail width shall be controlled at 2.5~3cm, the fish will be scalded in 70-75 ℃ hot water for 2 seconds, the fish scales will be scraped, the fish head will be cut off, and the blood stains, black membranes and impurities will be washed with flowing water. Slice to remove the spine, then rinse the 40min with running water and remove the blood. (2) the fish fillet was immersed in 4.5 ~ 5.5 °B6 salt water. The ratio of fish fillet to salt water was 1:2 and the salting time was 20min. (
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