Production method of cryptocryon irritans-resistant acanthopagrus schlegelii fries

Abstract

The invention relates to a production method of cryptocryon irritans-resistant acanthopagrus schlegelii fries, belonging to the field of disease-resistant fry production, in particular to the field of cryptocryon irritans-resistant fry production. The method comprises the steps of firstly, producing disease-resistant acanthopagrus schlegelii fries by a variable temperature infection method and a variable temperature aquaculture method, maintaining the water temperature during infection to have a certain difference with the aquaculture water temperature within 10 days after infection so as to enhance an immune effect for live larvae of cryptocryon irritans, and further combining with rotational culture to obtain the cryptocryon irritans-resistant acanthopagrus schlegelii fries with a longer effective immune protection period. The acanthopagrus schlegelii fries also have 70 percent of relative percent survival at the eighth month after immunity, and still have 42 percent of relative percent survival at the ninth month after immunity.

Description

technical field [0001] The technology relates to a method for producing anti-stimulant Cryptocaryonia black sea bream fry, which belongs to the field of disease-resistant fry production, specifically the field of anti-stimulant Cryptocaryon fry production. Background technique [0002] Black sea bream (Acanthopagrus schlegelii), belonging to the genus Pryridae and genus, is a coastal fish and generally does not migrate long distances. It is an excellent species for breeding and releasing in China's coastal areas, and it is also one of the rare species for mariculture in southeast China. [0003] Cryptocaryon irritans, commonly known as marine fish white spot disease, is a deadly parasitic disease caused by an obligate parasitic ciliate of marine fish——Cryptocaryon irritans (Colorni and Burgess, 1997) . In recent years, Cryptocaryoniasis has become one of the most serious parasitic diseases in my country, causing great harm to seawater fishery (Luo et al., 2008), and is list...

AI Technical Summary

Problems solved by technology

In recent years, researchers have carried out some basic research and applied research on the immune control of Cryptocaryon stimuli, and found that the larvae of Cryptocaryon stimuli can be used to infect seawater fish such as oblique grouper and pomfret through the body surface, which can reach 80%. The above immune protection rate (Luo et al, 2007; Dan Xueming et al, 2008; Yoshinaga et al, 1997), but the effective immune protection period of these experiments can only reach 3 months at most, and there is no detailed study on the effect of different temperatures on seawater Effects of Fish Acquired Immunity Protection

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