Method for artificially propagating odontobutis obscurus

Abstract

The invention provides a method for artificially propagating odontobutis obscurus, which is characterized by comprising the following steps of: firstly, selecting a plurality of pairs of sexually matured male and female odontobutis obscurus and placing into a spawning pond; secondly, placing a plurality of odontobutis obscura ovipositors in the spawning pond, wherein the number of the odontobutisobscura ovipositors is more than of the pairing number of the sexually matured male and female odontobutis obscurus, a wood horizontal trapezoidal cylinder is adopted as a male and female odontobutisobscurus mating place in each ovipositor, and a mesh used for spawning by the odontobutis obscurus is placed on inner side surfaces of two bevel edges of the trapezoidal cylinder; thirdly, controlling the illumination intensity of the environment of the spawning pond to be not more than 50lux, the environmental noise to be not more than 50 decibels and water temperature to be 18-29 DEG C until the female odontobutis obscurus leave the ovipositors, and ending spawning; and fourthly, taking out the mesh spawned with spawns from the ovipositors, laying the mesh on two sides of a rectangular bracket horizontally, placing into a hatching pond, ensuring that the distance between the mesh spawned with the spawns and a water surface is not less than 5cm, introducing oxygen to the hatching water body, and simultaneously controlling the hatching water temperature between 25 DEG C and 30 DEG C, the illumination intensity of the hatching pond to be less than 50lux and the environmental noise to be not more than 50 decibels until an odontobutis obscurus fry is hatched. The method for artificially propagating the odontobutis obscurus is simple and has high seedling rate.

Description

technical field [0001] The invention relates to a method for artificial reproduction of fish, in particular to a method for artificial propagation of sandfish. Background technique [0002] Odontobutis obscurus belongs to Perciformes, Odontobutis obscurus, Odontobutis obscurus. Commonly known as: Tang Channa, Shawu Channa, Tucaiyu, Tuhanba, Tugougong. English name: Dark sleeper. The body is stout, the head is big and broad, slightly flattened, the abdomen is round, and the rear side is flattened. Mouth large, superior, with oblique cleft reaching below center of eye. Upper and lower jaws with fine teeth. The vomer has no teeth. The eyes are small and prominent. Two dorsal fins, each separate. All fins have no spines. The pectoral fins are large and rounded; the posterior edge of the caudal fin is slightly rounded. No lateral lines. The body is dark brown with yellow luster, the abdomen is light yellow, there are irregular large black spots on the side of the body, ...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to invent a method for the artificial propagation of Channa japonica that can significantly improve the spawning rate and hatching rate for the problems of low spawning rate and hatching rate in the existing breeding methods

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