Batch breeding method for redhump eartheaters

Abstract

The invention discloses a batch breeding method for redhump eartheaters. A soil-based pond with muddy at the bottom is used as a spawning pond, a flat-bottomed ceramic container that is put upside down at the bottom of the pond is used as an egg attaching device, parent fishes are selected and freely bred in a season with a suitable temperature according to a proper male-to-female ratio, fertilized ova are hatched in a shaded aquarium, and fries are cultivated in a fish tank. The batch breeding method has the advantages of high spawning rate, high survival rate in hatching, few fry loss in hatching, high fry yield, simple operation flow and easiness in implementation, and can be applicable to large-scale fry production of oreochromis niloticus and fishes laying eggs on stone plates.

Description

technical field [0001] The invention belongs to the field of aquatic breeding, in particular to a method for mass breeding of bullhead seabream. Background technique [0002] The bullhead seabream belongs to the cichlid family of the order Perciformes and is a common species of tropical ornamental fish. The body shape of this fish is approximately oval, with flat sides. The male fish has a protruding head and a bright blue-green metallic luster. The female fish is grayish brown, and the scales are less reflective. The adult male fish is larger than the female fish. The bullhead seabream is native to South America and lives in the tropical rainforest environment. It is omnivorous and adapts to a water temperature of 20-32°C. The reproductive habits of bullhead seabream are as follows: the time of first sexual maturity is 10-12 months, the first sexual maturity of male fish is 12-13cm in length, and the first sexual maturity of female fish is 10-11cm in length. Eggs are laid...

AI Technical Summary

Problems solved by technology

The disadvantages of this breeding method are: ① the broodstock lay eggs at any position on the bottom of the pond, and cannot be collected in a directional way for artificial hatching; ② after the fish are hatched and released from the mouth of the broodstock, it is easy to be caught by other fish or predators. Swallowing, and there is a lack of palatable bait for fry in the cement pond, and the survival rate is extremely low; ③Every time you collect fry, you need to pull all the broodstock in the pond to the net, and then check whether the broodstock contains fry one by one, so it will disturb the broodstock for at least three or four days It can return to normal, resulting in the prolongation of the spawning cycle and the decrease of the annual egg production; ④ Pulling the net will cause great damage to the hatching fish eggs, and at the same time cause serious damage to the subsequent reproductive physiology of the broodstock of the fish eggs