(Jian Jie, Development Center, Modern Application Technology Institute, Wuhu County, Anhui Province, China 241100)
There are two sources of muddy seedlings:
The first is to purchase innocent and active loach in the market;
The second is to capture in ponds, rice fields, and lakes.
Muddy broodstock requires good shape, strong physique, no injuries, no disease, normal body color, body length 15 to 20 cm, weight 30 to 50 grams. Propagation loach requires mating of male and female broodstock. Male and female broodstock in the reproductive season of the identification method is: the male squeezing abdomen with milky white semen out of the reproductive hole; female abdomen round, large and neat egg hole. Loach generally begins to lay eggs in April. The breeding methods are as follows:
1. Natural spawning breeding. One week before the loach spawning, the spawning pond (earth pond or cement pond) is disinfected with quick lime and fresh water is injected. After the drug disappears, place the broodstock broodstock in the pool 1:3 or 1:2. The amount per mu is not more than 200 kg. Water temperature should be above 18 °C. Put brown tablets, poplars, aquatic plants, etc. on bamboo rafts as fish nests and immerse them in water in the spawning pool. Loach generally likes to lay eggs in the sunny morning. It ends at about 10:00 am. The fish nests with eggs should be removed immediately and incubated in hatching containers.
2. Artificial oxytocin production. Usually in April to May when the water temperature is high on sunny days. At a ratio of 1:2 for male and female broodstock, each female was injected with two 0.5-kg pituitary (or squid) pituitary, or 800-1000 IU chorionic gonadotropins. Male fish halved. Injections were performed using a 1 ml syringe and a 4th needle. Each female was injected with 0.2 ml and each male was injected with 0.1 ml. The injection site is good for the back muscles. After the injected loach was placed in a spawning pond with a water temperature of not less than 20°C, the estrus was spawned after 20 hours. Use nests to collect eggs and hatch in the hatchery. This method can concentrate loach spawning time and increase egg fertilization rate. Muddy fertilized eggs can be hatched in a still pool, the water temperature range is 18 °C ~ 31 °C, the appropriate temperature is 20 °C ~ 28 °C, about 24 °C water temperature, after 1 to 2 days, you can hatch muddy seedlings.
There are two sources of muddy seedlings:
The first is to purchase innocent and active loach in the market;
The second is to capture in ponds, rice fields, and lakes.
Muddy broodstock requires good shape, strong physique, no injuries, no disease, normal body color, body length 15 to 20 cm, weight 30 to 50 grams. Propagation loach requires mating of male and female broodstock. Male and female broodstock in the reproductive season of the identification method is: the male squeezing abdomen with milky white semen out of the reproductive hole; female abdomen round, large and neat egg hole. Loach generally begins to lay eggs in April. The breeding methods are as follows:
1. Natural spawning breeding. One week before the loach spawning, the spawning pond (earth pond or cement pond) is disinfected with quick lime and fresh water is injected. After the drug disappears, place the broodstock broodstock in the pool 1:3 or 1:2. The amount per mu is not more than 200 kg. Water temperature should be above 18 °C. Put brown tablets, poplars, aquatic plants, etc. on bamboo rafts as fish nests and immerse them in water in the spawning pool. Loach generally likes to lay eggs in the sunny morning. It ends at about 10:00 am. The fish nests with eggs should be removed immediately and incubated in hatching containers.
2. Artificial oxytocin production. Usually in April to May when the water temperature is high on sunny days. At a ratio of 1:2 for male and female broodstock, each female was injected with two 0.5-kg pituitary (or squid) pituitary, or 800-1000 IU chorionic gonadotropins. Male fish halved. Injections were performed using a 1 ml syringe and a 4th needle. Each female was injected with 0.2 ml and each male was injected with 0.1 ml. The injection site is good for the back muscles. After the injected loach was placed in a spawning pond with a water temperature of not less than 20°C, the estrus was spawned after 20 hours. Use nests to collect eggs and hatch in the hatchery. This method can concentrate loach spawning time and increase egg fertilization rate. Muddy fertilized eggs can be hatched in a still pool, the water temperature range is 18 °C ~ 31 °C, the appropriate temperature is 20 °C ~ 28 °C, about 24 °C water temperature, after 1 to 2 days, you can hatch muddy seedlings.