First, breeding habits
Scallops are dioecious, breeding season from April to June, from late May to early June for the prolific breeding period, generally require the completion of seedlings in the middle and late April. During the breeding season, the mature sperm is excreted and the sperm enters the hernia flap with the female's breathing water and meets the egg and fertilizes. The fertilized egg develops into a larval larvae within the zygomatic valve.
Second, artificial breeding technology
1, the choice of intimacy: age is generally 4-6 years old, complete shell, growth ring is large.
2. Checking maternal maturity: Correctly judging the maturation of hooked larvae (commonly known as barley seeds) is an important part of reproduction, and generally adopts the “one look and two take†method. Look: Look at the color of the female's nephew is purple-black or brown-yellow, and the graininess is not mature. Take: When the nephew is used, the filament can be drawn as mature, otherwise it is immature.
3, with the choice of fish
The best amphibious larval larvae of the swiftlet larvae are stingrays. Stingray should have good constitution and no damage.
4, artificial seedlings
Picking seedlings to choose sunny weather. The method of adopting the still water picking method is as follows: Wash the mature female quail shell, dry it for 0.5-2 hours, then put it into a water basin, and the water just immersed the carcass. Soon, the female worm will discharge the flocculent. That is, the larvae are introduced into the larvae, and after the larvae are discharged to a certain amount, the female quail is removed and the yellow mullet is added to the seedlings. To constantly sprinkle water and stir the fish to increase the chance of seedling attachment. When there are more white spots on the stingray, fish can be removed and placed in cages or larvae.
The number of seedlings attached depends on the individual size and constitution of the stingray, and the individual is large and has many physical constitutional points, and vice versa.
Hooked larvae are shed in the stingray body for about 8 to 18 days (parasite time shortens with rising water temperature, and the accumulated temperature is about 280°C). If stingrays are raised in cages, fish should be placed in the larvae pool 2-3 days before emergence. The area of ​​larvae is generally 1m2, and each pond is accompanied with about 1.5kg of seedlings to keep running water. After all the larvae are shed, remove the stingray.
Third, childish nurture
During the larval rearing period, water should be maintained to provide rich feed and high dissolved oxygen for the growth of juveniles. With the growth of carcasses, it is necessary to appropriately increase the flow rate and flow, and at the same time, add mud to the pond. The thickness of the river mud is based on vertical standards. When the young cub grows to about lcm, it can be divided up.
Plasma Products,Anti-Hbs,Safe Plasma,Safe Plasma Storage
Sichuan Yuanda Shuyang Pharmaceutical Co., Ltd. , https://www.syimmunoglobulin.com