Method for propagating tridentiger trigonocephalus with artificial comprehensive regulation ecological factors

Abstract

The invention provides a method for propagating tridentiger trigonocephalus with artificial comprehensive regulation ecological factors and relates to a method for propagating tridentiger trigonocephalus with regulation ecological factors. The method is to put parent fish in a spawning box, and is characterized in that: the ratio of the female parent fish to the male parent fish is 1:1 and each pair of fishes takes up an area of 0.25 m<2> in the spawning box; the spawning box is provided with holes with rough inner walls; the temperature of the water in the spawning box is 18 to 21 DEG C, with a 0.3 DEC C rise each day; the salinity of the water is 2 to 6; the concentration of dissolved oxygen in the water is 3.5 to 6.5mg / ml; the pH value of the water is 7.5 to 9.0; 8-hour illumination and 16-hour darkness are provided for the propagation environment each 24 hours, with an illumination intensity less than 600Lx; the environmental noise level is less than 15 dcibels; the bottom and the four sides of the spawning box are black; the female fish are taken out of an incubator after spawning, the flow rate of the water in the incubator is 2 to 4 cm / s, one third of the water is changed each day, the incubation lasts for 7 to 11 days; and the fish fries coming out of membrane are transferred to a nursery box till the propagation process completes. The method is used for artificial propagation of tridentiger trigonocephalus.

Description

Technical field: [0001] The invention relates to an artificial propagation method of the goby. Background technique [0002] Tridentiger trigonocephalus (Tridentiger trigonocephalus) belongs to Perciformes (Perciformes) Gobiidae (Gobiidae) Tridentiger. Significant differences. Gobiidae has a large number of fish species, most of which are small in size. They are coastal euryhaline benthic fish with a wide distribution. They are mainly distributed in the Pacific coast of northeastern Asia. In my country, they are mainly found in the Yellow Sea, Bohai Sea, The waters of the East China Sea, the South China Sea, and the Taiwan Strait are also common small fish in the low-salinity areas of the Yangtze River Estuary. At present, the research on reproductive biology of gobies mainly includes reports on individual fecundity, reproductive habits and group composition, early life history, etc., and there are very few in-depth studies. [0003] Zhao Bin, Fan Liping, Wang Jian and oth...

AI Technical Summary

Problems solved by technology

[0006] The routine method of artificial breeding of gobies adopts ①injection to oxytocin: injection of oxytocin agent, because the fish is small, this method is easy to cause injury and death of parent fish; ②direct artificial insemination: after screening the caught parent fish, directly Take out the sperm and eggs for artificial insemination. Due to the poor maturity of fish gonads, there is a problem of asynchronous development, which makes the quality of fertilized eggs poor, resulting in high mortality during hatching

The results of the research on the artificial reproduction technology of gobies show that the breeding period of gobies is long, the maturity of gonads is not uniform, the development of sperm and eggs is not synchronized, and the broodstock caught are females more, less males