What are the breeding methods of map fish?

The reproduction of map fish is an important part of the breeding of map fish. Next, I will tell you about the artificial breeding method of map fish.

Breeding of map fish: Breeding environment

It is best to use a large tank for breeding aquarium, in an aquarium with a size of 80cm?50cm?45cm.

Put in the selected pair of broodstock. Since the map fish is an oviparous fish and sinks eggs, a large smooth flat stone or a large plate with a size of 20cm?20cm?2cm is used at the bottom of the box for laying ovaries. .

The breeding water temperature is controlled at 26℃-28℃. Keep the surrounding environment quiet during spawning.

Reproduction of map fish: selection and cultivation of broodstock

The sexual maturity age of map fish is more than one year. Generally, individuals with a length of more than 18cm, good body shape, and sound development through natural pairing are selected as broodstock.

The male and female identification characteristics are: the male fish has a thick and well-developed head, bright-colored markings on the body, golden-orange patches on the gill cover, bright-colored tail star spots, and long and pointed anal fins; female fish Overall, it is thicker than the male fish, but its body color is slightly lighter and its abdomen is enlarged.

Broodstock should be reared with high-quality bait before breeding. If the breeding work is done well, more eggs will be laid and the hatching rate will be high.

Reproduction of map fish: estrus and spawning

When the parent fish starts to come into estrus, the male fish is very excited, convulses all over the body, and vibrates all the fins in the body. , the tail star becomes blacker, and the orange-red becomes brighter. It swims around the female fish constantly, bumps the female fish's head and body with its big mouth, and at the same time opens its big mouth to clean the ovaries and nearby sand and gravel.

The spawning time is mostly around dawn. The female fish protrudes her ventarium, constantly swings her body, vibrates her fins, and lays her eggs on cleaned stones. The male fish then ejaculates. of fertilization.

Female fish lay about 500-2000 eggs each time. The eggs are larger than those of ordinary fertilized fish eggs. The eggs are transparent and sticky. Unfertilized eggs are light yellow and fertilized eggs are irregular. Arranged on the ovaries at the bottom of the tank.

Reproduction of map fish: egg protection and nursery

Male and female broodstock have strong habits of protecting eggs and young. They use their pectoral fins to constantly and slightly flap near the eggs to feed them. Oxygenate.

It takes 36-42 hours for the fertilized eggs to hatch into fry. The newly hatched fry do not like to move. Since the yolk sac of the newly hatched fry has been absorbed and exhausted, they can be fed with open bait after 24 hours. Zooplankton invisible to the naked eye such as rotifers and paramecium may be temporarily replaced with cooked egg yolk powder, but they should be fed in small amounts to avoid affecting the water quality.

After 5-6 days, small cladocerans, artemia nauplii, etc. can be fed. Artemia eggs only need to be fully hatched with about 20% salt water one day in advance to obtain artemia nauplii. When the larvae swim quickly for food, the parent fish can be fished out.

During the fry and larval stage, there must be micro live bait for feeding in order to develop and grow smoothly and normally. Fertilized eggs can also be fed artificially through incubation.

Reproduction of map fish: conditioning of spawning broodstock

The broodstock that have just laid eggs are hungry and tired, so they need to be properly fed to prevent them from being hungry and swallowing their own eggs during the period of protecting their larvae. cub. In order to make broodstock produce more eggs, it is very important to strengthen the cultivation of broodstock after spawning.