Synchronous gonad maturing method of female fugu obscurus and male fugu obscurus

Abstract

The invention discloses a synchronous gonad maturing method of female fugu obscurus and male fugu obscurus. According to the method, female fugu obscurus and male fugu obscurus which are large in size, strong in physique and great in gonad development condition are adopted as parents, composite vitamins are added into feed for nutrient reinforcement, and protein feed control is carried according to the sexual maturity; illumination different in intensity is adopted in a breeding process of the parent fishes, gonad development of the two parent fishes is facilitated through water temperature control, water flow stimulation and other approaches, one-time physiologic maturation pre-acceleration control is combined, and the problem that female fugu obscurus and male fugu obscurus are not synchronous in gonad development is solved. The quality of eggs and sperms during crossbreeding of female fugu obscurus and male fugu obscurus is improved, and therefore the spawning induction rate and fertility rate of the parent fishes are increased.

Description

technical field [0001] The invention relates to the technical field of aquaculture, in particular to a method for synchronous maturation of the gonads of female puffer puffer obscura and male puffer puffer obscurus. Background technique [0002] Both red-finned puffer and puffer obscura belong to Fuguformes, Pufferidae, Puffer genus ( Fugu ). The red fin puffer mainly inhabits the warm seawater environment at the bottom of the sea. It is mainly distributed in the Northwest Pacific Ocean, from the coasts of Japan, South Korea and Russia to the East China Sea. Taiwan of my country is distributed in the back, northeast and east waters. It lays eggs in the Haizhou Bay area from March to May every year, and reaches the peak production period in early May. The time is very short, and the hatching water temperature is 17-18 ℃. [0003] Puffer obscurus is a warm-temperate bottom-migration fish in coastal waters, and it is only distributed in China and North Korea. China is produc...

AI Technical Summary

Problems solved by technology

[0004] The red-finned puffer is a seawater fish, reaching sexual maturity in May every year, the hatching period is short, and the water temperature is lower than that of puffer obscurus, while puffer obscurus is an anadromous fish that lays eggs in fresh water , need to go through two processes of salinization and desalination to reach sexual maturity, and the hatching temperature is 4-6 ℃ higher than that of red fin. In the process of artificial breeding, gonad development and maturation are often asynchronous, which affects the speed of artificial reproduction. Only relying on sex hormone drugs to accelerate its gonad development, stress and stress responses are strong, and routine injections will also lead to death and injury of broodstock, resulting in induced labor effects. not ideal

Therefore, it is particularly important to do a good job of breeding without harming or minimizing the damage to the fish body through certain technical means. At present, there is no method for promoting the synchronous development of the gonads of puffer puffer obscura females and puffer pufferfish hybrids males. Report, therefore, urgently need a kind of improved technology to solve this problem that exists in the prior art