During the artificial propagation of eel in the southern region, there are many drawbacks to the collection of fertilized eggs using traditional methods. The biggest drawback is that about 30% of the fertilized eggs fall into the sediment in the pond, the hatching rate is low, and the fertilized eggs are distributed. Irregularities, poor lighting, etc., are prone to saprophytic diseases. If a "cage-type" squid fertilized egg collection method is adopted, artificial breeding of fertilized eggs by Feng Qi and Jian Jian can be achieved, and good results can be obtained. The specific method is as follows:
First, the production of cages with a section of Lasha flowers dense mesh (net 1.5 mm) temporarily made a cage, its size can be adapted to local conditions, and according to the need to use the number of squid broodstock to decide.
Second, the installation of cages Temporary well-made cages submerged in water (water conditions are good, the depth of the appropriate ponds, rivers or micro-flow of large-scale cement can be) 1 m ~ 1.5 m, fixed cages Afterwards, pull a rope every 40 centimeters in the cage.
Third, the preparation and installation of fish nest Nesting fish nest can be used in the production of gold rattan or root water plants. After the fish nest is cleaned, disinfected and disappeared after toxicity, it is evenly distributed on the rope in the cage.
Fourth, anti-escape equipment In order to prevent eel bred estrus when spawning outside the cage to escape, the cage must be stamped. You can use a piece of mesh to tightly cover the cage, sew the interface, leaving only a mouth of about 1 meter for the broodstock entrance.
5. After the broodstock has been placed in the broodstock, the broodstock can be placed into the cage at the required ratio from the entrance of the cage lid. If hormones are used for artificial aphrodisiac, the broodstock should be injected into the cage first. To be produced, the cage lid is finally sewn.
VI. Postpartum treatment After the oviposition of the carp is over, the cage lid can be dismantled, the broodstock can be caught, and all the fish nests and cages of the carp fertilized eggs can be transferred into the hatchery for incubation.
The use of cages for the artificial propagation of salmon and the collection of fertilized eggs has several advantages:
1. To avoid the traditional method of collecting about 30% of the loss of salmon fertilized eggs. 2. It can reduce the amount of broodstock broodstock and the amount of oxytocin, reduce the cost and increase economic benefits. 3. The distribution of fish eggs adhering to the inner wall of the cage is relatively uniform. After moving into the hatchery pond, the water layer is easier to adjust and the lighting conditions are good, which reduces the incidence of watery mildew and has a high emergence rate. 4. It is not necessary to repurchase any materials, use the dense mesh of the original Laxia flower, and temporarily make the cage according to needs. After hatching, it can be disassembled and restored to the original pull-net, which is simple and easy.
First, the production of cages with a section of Lasha flowers dense mesh (net 1.5 mm) temporarily made a cage, its size can be adapted to local conditions, and according to the need to use the number of squid broodstock to decide.
Second, the installation of cages Temporary well-made cages submerged in water (water conditions are good, the depth of the appropriate ponds, rivers or micro-flow of large-scale cement can be) 1 m ~ 1.5 m, fixed cages Afterwards, pull a rope every 40 centimeters in the cage.
Third, the preparation and installation of fish nest Nesting fish nest can be used in the production of gold rattan or root water plants. After the fish nest is cleaned, disinfected and disappeared after toxicity, it is evenly distributed on the rope in the cage.
Fourth, anti-escape equipment In order to prevent eel bred estrus when spawning outside the cage to escape, the cage must be stamped. You can use a piece of mesh to tightly cover the cage, sew the interface, leaving only a mouth of about 1 meter for the broodstock entrance.
5. After the broodstock has been placed in the broodstock, the broodstock can be placed into the cage at the required ratio from the entrance of the cage lid. If hormones are used for artificial aphrodisiac, the broodstock should be injected into the cage first. To be produced, the cage lid is finally sewn.
VI. Postpartum treatment After the oviposition of the carp is over, the cage lid can be dismantled, the broodstock can be caught, and all the fish nests and cages of the carp fertilized eggs can be transferred into the hatchery for incubation.
The use of cages for the artificial propagation of salmon and the collection of fertilized eggs has several advantages:
1. To avoid the traditional method of collecting about 30% of the loss of salmon fertilized eggs. 2. It can reduce the amount of broodstock broodstock and the amount of oxytocin, reduce the cost and increase economic benefits. 3. The distribution of fish eggs adhering to the inner wall of the cage is relatively uniform. After moving into the hatchery pond, the water layer is easier to adjust and the lighting conditions are good, which reduces the incidence of watery mildew and has a high emergence rate. 4. It is not necessary to repurchase any materials, use the dense mesh of the original Laxia flower, and temporarily make the cage according to needs. After hatching, it can be disassembled and restored to the original pull-net, which is simple and easy.