Natural propagation method for coilia ectenes

Abstract

The invention discloses a natural propagation method for coilia ectenes. According to the natural propagation method, parent fishes are bred according to the river and sea migration rule of the coilia ectenes, live baits adaptive to seawater or fresh water living are additionally thrown, pellet feed with vitamin and microelement added is additionally thrown, water flows of a parent fish pool are increased, salinity is regulated and controlled, a breeding fish bed is arranged, fertilization time of fertilized ova is controlled, the fertilized ova is hatched, fish larvas are bred, and fish fries are bred. The bottleneck problems of large-scale breeding of the coilia ectenes and industrialization propagation of the fries are solved, the final spawning rate is up to 98%, the fry obtaining rate is up to 90%, and the fries are strong and healthy.

Description

technical field [0001] The invention relates to a natural breeding method for common anchovy, which has a high breeding success rate and belongs to the technical field of fish breeding. Background technique [0002] Anchovy, one of the rare fishes in the Yangtze River, is expensive. However, due to environmental pollution and environmental damage, the living environment of anchovy in the Yangtze River is harsh. The annual output of anchovy has dropped from 10 million kg to less than 20,000 kg now. It is endangered, species protection, artificial Breeding research is imminent. However, due to the tenderness of the anchovy, it dies immediately when it comes out of the water. In the common artificial breeding process, it is necessary to artificially inject the parent fish with oxytocin hormone to promote the maturation of the gonads, and then manually squeeze the eggs and semen of the brood fish. Hormone will cause a large number of broodstock to die, and there are very few br...

AI Technical Summary

Problems solved by technology

[0002] Anchovy, one of the rare fishes in the Yangtze River, is expensive. However, due to environmental pollution and environmental damage, the living environment of anchovy in the Yangtze River is harsh. The annual output of anchovy has dropped from 10 million kg to less than 20,000 kg. It is endangered, species protection, artificial Breeding research is imminent

However, due to the tenderness of the anchovy, it dies immediately when it comes out of the water. In the common artificial breeding process, it is necessary to artificially inject the parent fish with oxytocin hormone to promote the maturation of the gonads, and then artificially squeeze the eggs and semen of the parent fish. Hormones will cause a large number of broodstock to die, and very few broodstock can be induced to produce successfully. After the second fishing and squeezing of eggs and sperm, almost all of the broodstock will die

Therefore, the success of artificial breeding of sword anchovy is very low, and the artificial propagation is unsuccessful, which is the root cause of the large-scale cultivation and industrialization of sword anchovy in the Yangtze River.