Method for hatching carp fries

Abstract

The invention discloses a method for hatching carp fries. Club moss has characteristics that fragrance naturally given off by the club moss can stimulate female fishes to ovulate, so that the female fishes can ovulate on the next day after the club moss is arranged in a hatching pond. The ovulating data can be delayed for 2-3 days if other roe attachments are employed. A wood structure is established in the hatching pond, and the flowing clean water beats wood boards and then disperses all around, so that the content of oxygen entering the fry hatching pond can be increased, and the roe attached on the straight club moss can be normally hatched. Furthermore, the club moss is stacked to form grid club moss layers, so that the roe attaching ratio can be improved, and the roe attaching ratio by means of the club moss is higher than the roe attaching ratio by means of other attachments such as aquatic plants and palm sheets by 20-30% or more, and therefore the roe hatching success rate can be improved.

Description

technical field [0001] The invention relates to the technical field of breeding, in particular to a method for hatching carp fry. Background technique [0002] Commonly known as carp guaizi, Maozi, etc., carp belongs to Cyprinidae. The side of the body is flat and the abdomen is round, the mouth is horseshoe-shaped, and there are 2 pairs of whiskers. The base of the dorsal fin is longer, and both the dorsal and anal fins have a thick and serrated spine. Body side golden yellow, caudal fin lower lobe orange red. Carp usually inhabit the bottom of water bodies overgrown with aquatic plants in rivers, lakes, reservoirs, and ponds, and mainly feed on benthic animals. It has strong adaptability, cold resistance, alkali resistance and hypoxia resistance. It can lay eggs in running water or still water, and the spawning places are mostly in aquatic plants, and the eggs adhere to the aquatic plants to develop. Carp is one of the freshwater fishes with the most varieties, the wi...

AI Technical Summary

Problems solved by technology

[0003] At present, carp is the main object of freshwater aquaculture, and its breeding season is from April to June. For the field of carp breeding technology, in addition to artificial insemination and hybridization, the most traditional technology is to put the male and female bodies of carp in a certain proportion. In a culture pond, and then use it as the parent fish, make the carp parent breed freely lay eggs in the culture pond, and then freely hatch into the method for raising seedlings, although this method can reduce the cost of raising seedlings than artificial insemination and hybridization technology, and improve the efficiency of raising seedlings. Natural adaptability, however, its survival rate is low, which affects the profit of seedling cultivation, making the survival rate of fish eggs affected by uncontrollable factors, resulting in a low survival rate of fish eggs