Muddy natural breeding methods
After the spring, trim the fish ponds, disinfect them with lime, and inject new water. After the medicinal properties of the pool disappear, the broodstock is placed in the pool at a ratio of 1:2 for males and females, and about 300 grams per square meter is placed. When the pool water temperature rises to about 20°C, a fish nest made of brown chips, willow twigs, or water grass is placed in the pool. After the fish nest is placed, the dust and dirt on the top should be inspected and cleaned frequently to avoid the effect of adhesion of the eggs when the eggs are laid. The loach likes to lay eggs in thunderstorm days or when the water temperature suddenly rises. Spawning starts early in the morning and ends at approximately 10:00 am. Spawning takes 20 to 30 minutes. At the time of spawning, the broodstock chased fiercely, and at the peak, the male slapped around the anterior abdominal position of the female and completed the spawning and fertilization process. After spawning, fish nests with eggs should be removed in a separate pool for hatching to prevent broodstock from swallowing eggs. At the same time, add a new fish nest and allow the unspawned broodstock to continue spawning. The spawning pool should prevent snakes, frogs, and rats from harming the broodstock.
Muddy artificial propagation method
Mud artificial reproduction is the same as home fish. The type and dosage of the oxytocic acid to be used are calculated in terms of female moles: 0.5 to 1 pituitary glands, 2 to 3 frog pituitary glands, 100 to 150 IU chorionic gonadotropins, or the like (LRH-A). ) 5 to 10 micrograms. Dove the dose by half. The solvent injection volume was 0.1-0.2 ml, and it was injected using a 1 ml syringe and a 4 needle. The injection site is between the abdominal midline chest and pelvic fin, but it can also be injected back muscle. Due to the muddy tendency of drilling, it can be wrapped with warm gauze (exposing the injection site). After being injected into the spawning pool, the work thereafter is the same as natural breeding. Water temperature 20 ~ 25 °C, after 10 to 20 hours will be estrus spawning.
If artificial insemination is adopted, male and female loaches that have been injected with the oxytocculum may be temporarily maintained in small ponds or cages. When the water temperature is 18 to 25°C, after 10 to 15 hours, the eggs are discharged from the abdomen of the female pupa by light pressure. Dry artificial insemination. The method of operation and precautions are the same as those of home fish. Eggs are laid on the nest immediately after artificial insemination. The method is to take a bucket of clear water and lay the fish nest flat on the bottom of the bucket. Then one person gently shakes the fish nest while stirring the water body. The other slowly pours the eggs into the bucket to make the eggs evenly on the nest. Go to the nest and transfer to the hatchery for hatching. Muddy fertilized eggs can normally hatch in the water temperature range of 20 to 30°C. Generally, fry can be hatched in about 2 days. With a small container of still water, frequent changes of water (2 times a day) have a good hatching effect. 400-600 eggs per litre of water are suitable.
In order to avoid shock during hatching, 0.110-6 malachite green solution can be used in hatching for disinfection to prevent parasitism. The newly hatched seedlings are not free to move. They are attached to the nest or other objects with their heads, and they are yolk-nutrient. The fry hatched in the pond is generally kept in the original pool, the water depth is kept at 20-30 cm, and the density per square meter is 500-1500. It is advisable to remove part of the fry and grow it in another pond.
The seedlings hatched for 3 days and started feeding. At this point, the cooked egg yolk or fishmeal suspension should be fed, several times a day, and the amount of feed should be within one hour. After 2 or 3 days, cast water fleas, rotifers, chopped silk cocoons or cocoons. After about 10 days of cultivation. After about 1 month, when the fry grows up to 3 cm, it will be transferred to the fingerlings pond. It can also be directly placed in paddy fields, ponds or pits for adult fish rearing.
Fish pond area is suitable for 30-50 square meters. Before the seeds are released, they must be disinfected with clear ponds and basal fertilizers should be used to cultivate food organisms. The amount of seed is about 30 grams per square meter (800 to 1,000 tails). The fish species is fed with plant feeds within half a month of the next tank and is fed twice a day. The amount of fish is 3% to 5% of the weight of the fish. In summer, the fish pond water has a high temperature, and it is necessary to pay attention to changes in water quality at any time and change new water frequently. When the fish grows to 8 to 10 cm, it enters the adult fish rearing stage.
After the spring, trim the fish ponds, disinfect them with lime, and inject new water. After the medicinal properties of the pool disappear, the broodstock is placed in the pool at a ratio of 1:2 for males and females, and about 300 grams per square meter is placed. When the pool water temperature rises to about 20°C, a fish nest made of brown chips, willow twigs, or water grass is placed in the pool. After the fish nest is placed, the dust and dirt on the top should be inspected and cleaned frequently to avoid the effect of adhesion of the eggs when the eggs are laid. The loach likes to lay eggs in thunderstorm days or when the water temperature suddenly rises. Spawning starts early in the morning and ends at approximately 10:00 am. Spawning takes 20 to 30 minutes. At the time of spawning, the broodstock chased fiercely, and at the peak, the male slapped around the anterior abdominal position of the female and completed the spawning and fertilization process. After spawning, fish nests with eggs should be removed in a separate pool for hatching to prevent broodstock from swallowing eggs. At the same time, add a new fish nest and allow the unspawned broodstock to continue spawning. The spawning pool should prevent snakes, frogs, and rats from harming the broodstock.
Muddy artificial propagation method
Mud artificial reproduction is the same as home fish. The type and dosage of the oxytocic acid to be used are calculated in terms of female moles: 0.5 to 1 pituitary glands, 2 to 3 frog pituitary glands, 100 to 150 IU chorionic gonadotropins, or the like (LRH-A). ) 5 to 10 micrograms. Dove the dose by half. The solvent injection volume was 0.1-0.2 ml, and it was injected using a 1 ml syringe and a 4 needle. The injection site is between the abdominal midline chest and pelvic fin, but it can also be injected back muscle. Due to the muddy tendency of drilling, it can be wrapped with warm gauze (exposing the injection site). After being injected into the spawning pool, the work thereafter is the same as natural breeding. Water temperature 20 ~ 25 °C, after 10 to 20 hours will be estrus spawning.
If artificial insemination is adopted, male and female loaches that have been injected with the oxytocculum may be temporarily maintained in small ponds or cages. When the water temperature is 18 to 25°C, after 10 to 15 hours, the eggs are discharged from the abdomen of the female pupa by light pressure. Dry artificial insemination. The method of operation and precautions are the same as those of home fish. Eggs are laid on the nest immediately after artificial insemination. The method is to take a bucket of clear water and lay the fish nest flat on the bottom of the bucket. Then one person gently shakes the fish nest while stirring the water body. The other slowly pours the eggs into the bucket to make the eggs evenly on the nest. Go to the nest and transfer to the hatchery for hatching. Muddy fertilized eggs can normally hatch in the water temperature range of 20 to 30°C. Generally, fry can be hatched in about 2 days. With a small container of still water, frequent changes of water (2 times a day) have a good hatching effect. 400-600 eggs per litre of water are suitable.
In order to avoid shock during hatching, 0.110-6 malachite green solution can be used in hatching for disinfection to prevent parasitism. The newly hatched seedlings are not free to move. They are attached to the nest or other objects with their heads, and they are yolk-nutrient. The fry hatched in the pond is generally kept in the original pool, the water depth is kept at 20-30 cm, and the density per square meter is 500-1500. It is advisable to remove part of the fry and grow it in another pond.
The seedlings hatched for 3 days and started feeding. At this point, the cooked egg yolk or fishmeal suspension should be fed, several times a day, and the amount of feed should be within one hour. After 2 or 3 days, cast water fleas, rotifers, chopped silk cocoons or cocoons. After about 10 days of cultivation. After about 1 month, when the fry grows up to 3 cm, it will be transferred to the fingerlings pond. It can also be directly placed in paddy fields, ponds or pits for adult fish rearing.
Fish pond area is suitable for 30-50 square meters. Before the seeds are released, they must be disinfected with clear ponds and basal fertilizers should be used to cultivate food organisms. The amount of seed is about 30 grams per square meter (800 to 1,000 tails). The fish species is fed with plant feeds within half a month of the next tank and is fed twice a day. The amount of fish is 3% to 5% of the weight of the fish. In summer, the fish pond water has a high temperature, and it is necessary to pay attention to changes in water quality at any time and change new water frequently. When the fish grows to 8 to 10 cm, it enters the adult fish rearing stage.
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