A fish fertilized egg hatching device and hatching method

Abstract

The invention belongs to the field of fish breeding, and mainly relates to a device for incubating zygotes of fishes. The device comprises an incubating pond. A first water inlet is formed in the bottom of the incubating pond, a second water inlet is formed in a position above the incubating pond, and artificial fish nests for collecting roes are arranged in the incubating pond. A shower head for spraying water into the incubating pond is connected to the second water inlet. The device has the advantages that water is supplied into the incubating pond from bottom to top by the first water inlet in the bottom of the incubating pond, so that water in the incubating pond can be always in a flowing state, sufficient oxygen in the water can be guaranteed, oxygen deficient conditions of the roes due to the fact that the roes cohere with one another can be prevented, and the roes can be assuredly normally incubated; the water can be sprayed on a water surface of the incubating pond from top to bottom by the second water inlet, impact force of the water can be relieved by a shower head structure under the condition that requirements on water changing quantities are met and water flow is guaranteed, and accordingly the zygotes and / or fish fry just out of membranes can be prevented from being burst open by the water flow.

Description

technical field [0001] The invention belongs to the field of fish breeding, and in particular relates to a hatching device and a hatching method for fertilized fish eggs. Background technique [0002] Saprolegniasis is widely found in freshwater or brackish waters and moist soils all over the world. It is a kind of common mold that saprophytes on dead organic matter. In the process of fish rearing, fish eggs are very easy to encounter Saprolegniasis infection and get Saprolegniasis. The traditional method of controlling saprolegniasis in fish is to control the hatching temperature of fish eggs, but this method is not suitable for the eggs of sandfish with a long incubation period. Channa is a small fish with very delicious meat. The hatching cycle of the eggs of this fish is usually 28-30 days. The long hatching period leads to the infection of the fish eggs before hatching. Once infected with saprolegniasis, usually once infected with saprolegniasis, the fish eggs are bas...

AI Technical Summary

Problems solved by technology

The traditional method of controlling saprolegniasis in fish is to control the hatching temperature of fish eggs, but this method is not suitable for sand pond snakehead eggs with a long incubation period

Channa is a small fish with very delicious meat. The hatching cycle of the eggs of this fish is usually 28-30 days. The long hatching period leads to the infection of the fish eggs before hatching. Once infected with saprolegniasis, usually once infected with saprolegniasis, the fish eggs are basically lost, causing great economic losses to farmers

In addition, the eggs of the sandfish are viscous eggs, allowing them to hatch naturally in the pond, the eggs are very easy to bond together and cause hypoxia, and eventually mildew and rot

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