Production method for cryptocaryon irritant prevention trachinotus ovatus seedling

Abstract

The invention relates to a production method for cryptocaryon irritant prevention trachinotus ovatus seedlings, and belongs to the field of disease resistance fry production, and specifically relates to the field of cryptocaryon irritant prevention fry production. A method of varying temperature infection and varying temperature culture is firstly used to produce disease resistance trachinotus ovatus seedlings. Water temperature in infection and cultivation water temperature in 10 days after infection keep certain temperature difference, so as to enhance immune effect of cryptocaryon irritant live larva, to further combine with rotational culture. The method obtains cryptocaryon irritant prevention trachinotus ovatus seedlings in a relatively long effective immune protection period. In the eighth month after immunity, the seedlings still have relative protection rate of 52%, and in the ninth month, the seedlings still have relative protection rate of 28%.

Description

technical field [0001] The technology relates to a production method of anti-stimulant Cryptocaryon ovata pomfret fry, belongs to the field of disease-resistant fry production, specifically the field of anti-stimulant Cryptocaryon fry production. Background technique [0002] Oval pomfret (Trachinotus ovatus), belonging to the family Trevalidae and the genus Pompano, is a warm-water pelagic fish with migratory and gregarious habits. It grows fast, eats simple food, and has delicious meat. It has become an important breeding species in the coastal areas of South China. Variety. [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 listed as one...

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 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 Effects of marine fish on acquired immune protection

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