Breeding method of stingray

Abstract

The invention provides a breeding method of stingray. The method comprises steps as follows: tap water is taken and air-dried for 12 h or longer, the air-dried water is purified by a filter and injected into a fish tank; wild male crown black-white stingray and four-generation oriented improved female crown black-white stingray are selected, and grouping is performed in the female-male proportionof 5:1 for breeding; disease-free individuals with healthy bodies, bright pattern colors and graceful postures are selected as parent fish; sexually mature female parents are put in a prepared breeding tank to be mated with male stingray; water temperature and water quality conditions are strictly controlled in the period of breeding, pH value is required to be maintained in a range of 6.0-7.5, nitrate content is required to be maintained at 100-300 mg / , and the water temperature is controlled at 29-31 DEG C; after the female stingray gives birth, juvenile fish is fished out in time and fed independently, and when body disc of the juvenile fish reaches 15 cm or larger, the juvenile fish is sold or put in a large feeding tank for cultivation. According to the method, reproductive success rate, farrowing rate and survival rate of the stingray can be increased, profits of farmers are increased, and demands of the market are met.

Description

technical field [0001] The invention belongs to the technical field of aquaculture, and in particular relates to a method for breeding stingrays. Background technique [0002] Stingrays, also known as devil fish, belong to Chondrichthyes - Elasmobranochii - Batoidea - Potamotrygonidae, and are mostly distributed in the Amazon Basin of South America and the tropical south of Asia. Rainforest river area. The stingray has a round body, a body disc diameter of up to 40-100cm, a whip-shaped tail, and a venomous spine. The spine is hollow and has two rows of small barbs at the tip. The venom is neurotoxic. Stingrays are bottom-moving fish and are nocturnal animals. They prey on small fish, shrimps, and crabs at night. [0003] Although stingrays are loved by consumers and have a large market demand, their breeding conditions are relatively strict. In the prior art, there are no water quality conditions, water temperature conditions, daily maintenance of female fishes and juvenil...

AI Technical Summary

Problems solved by technology

[0003] Although stingrays are loved by consumers and have a large market demand, their breeding conditions are relatively strict. In the prior art, there are no water quality conditions, water temperature conditions, daily maintenance of female fishes and juvenile fish cultivation in the prior art. Clear standard instructions, not easy to operate

Therefore, there are problems such as easy abortion of female fish or low survival rate of juvenile fish, unstable seed production, etc., making it impossible for farmers to increase profits