Technical Manual of Rana nigromaculata Culture

The location of breeding Rana nigromaculata should be in the place with sufficient water source and good water quality, and reliable power supply should be provided. Construction of the black spot frog culture pond: the pond can be ditched according to the topography, the bottom of the pool can be covered with a layer of black impervious plastic film, and a Skynet should be built above the pool. Create a natural ecological environment: hang several energy-saving lamps on both sides of the pool and plant some soybeans. Daily feeding and management of Rana nigromaculata: feed bait such as yellow powder insects and fly maggots, and do not mix unsterilized black spotted frogs in the field.

I. selection of sites for breeding black spot frogs

1. Water quality requirements

When selecting the site, we should choose the place where the water source is sufficient and the water quality is better, we can generally test the water quality, and the black spot frog is more suitable to survive in the water quality with weak alkaline (PH = 7-8).

2. Power requirements

In the process of breeding, there should be reliable power supply to facilitate the daily management of the black spot frog.

3. Water conservancy requirements

To do a good job in the corresponding drainage and irrigation treatment, water intake should be convenient and drainage should be smooth, which is conducive to drought and waterlogging resistance.

4. Geographical location requirements

During this period, we should stay away from industrial areas and domestic pollution sources, and should not choose places with frequent natural disasters. If we need to lease land for farming, it is necessary to ensure the legitimacy of the land to prevent land disputes.

Second, build the culture pond of Rana nigromaculata

1. Generally take mu as the unit, and then trench and build the pool according to the specification that the length is 20 meters and the width is 4.5 meters (depending on the terrain). The inner pool is 20 meters long, 1.5 meters wide and 0.4 meters deep.

2. The bottom of the pool can be covered with a layer of black impervious plastic film, and the two edges and the bottom can be compacted with soil, and the land area of 1.5 meters wide can be left on both sides of the inner pool for the habitat and activities of the black spot frog.

3. Then build a sky net 2 meters above the ground (for people to travel freely) above all ponds to prevent natural enemies such as egrets, fish eagles and sparrows from invading. Water intake and drainage pipes need to be designed before and after the pond to ensure smooth drainage during the breeding period.

Third, create a natural ecological environment

In order to promote the black spot frog to grow better, it is necessary to create a relatively closed imitation natural ecological environment during the breeding period. generally, several energy-saving lamps can be hung on both sides of the pond, and a small amount of soybeans can be planted after the black spot frog has changed from a tadpole to a young frog. Several crucian carp seedlings can be raised in the pond.

Daily feeding and management of Rana nigromaculata

1. Bait

(1) because the eyes of black spot frogs are highly myopic, they can only see the living creatures in front of their eyes, and can generally be fed with bait such as yellow powder insects, earthworms, fly maggots (larvae of flies) and so on.

(2) taking into account the breeding cost, the maggot is a better choice. The maggot contains protein and amino acids in the body, the activity of the comprehensive nutrition maggot is also very strong, the palatability is good, and it is easy to be found and eaten by the black spot frog. Breeding maggots are easy to manage, and the cost is low, the cycle is short, and the yield is high.

2. Prevention of escape

The purse seine outside the pond is mainly to prevent the black spotted frog from escaping. The black spotted frog is wild and good at jumping, so it is necessary to often check whether there are holes or holes in the purse seine, and if so, it is necessary to mend the blockage in time.

3. Epidemic prevention

(1) Rana nigromaculata is a wild animal with strong vitality and generally does not have major infectious diseases, but it is prone to skin rot when the water source is unclean or when the frog is mixed in the wild without disinfection.

(2) if there is a local infection, it is necessary to clean up the diseased frog and isolate it in time, during which penicillin sodium solution can be used to inject the white skin position of the thigh.