A kind of yellowtail yellowtail seedling anesthesia transportation method

Abstract

The invention relates to an anesthesia transportation method for seriola aureovittata fry, and belongs to the technical field of fish culture. The method comprises the following specific steps: temporarily culturing the seriola aureovittata fry to be transported, and enabling intestines to be empty; anesthetizing the seriola aureovittata fry by using MS-222 with a concentration of 40-60 ppm; oxygenating the anesthetized seriola aureovittata fry, performing packaging, wherein dissolved oxygen in a packaging bag is maintained at 6-18 mg / L, ammonia and nitrogen concentration accumulation does notexceed 0.2 mg / L, nitrite concentration accumulation does not exceed 0.1 mg / L, temperature of seawater in the packaging bag is 18-21 DEG C, the seawater in the packaging bag contains MS-222 with a concentration of 5-10 ppm, and adding penicillin; and keeping the temperature unchanged during transportation, and controlling transportation time within 24 h. The method provided by the invention greatly improves a survival rate of the seriola aureovittata fry in the transportation process, prolongs survival time of the seriola aureovittata fry, satisfies long-distance transportation of the seriolaaureovittata fry, and facilitates development of seriola aureovittata culture industry; and meanwhile, the method avoids food safety problems caused by anesthesia death and anesthetic residues.

Description

technical field [0001] The invention relates to a method for transporting yellowtail seedlings, belonging to the technical field of fish breeding. Background technique [0002] The yellow-striped yellowtail (Seriola aureovittata) belongs to the order Perciformes, the family Carangidae, and the genus Seriola. It is a species with potential for commercial farming and recreational fishing. It has the advantages of high yield, high economic value and edible value, and is deeply loved by consumers. It is a warm-temperate pelagic fish in the middle and upper layers of the ocean distributed globally. There are 9 species of amberjack in the world. According to regional differences, it can be divided into 3 geographic subspecies with similar morphology: Asian population, California population and southern (South Africa-Australia) population. In order to vigorously develop the breeding technology of yellowtail and expand the scale of industrialization, it has become an important subj...

AI Technical Summary

Problems solved by technology

In addition, the transport water temperature and density also have a great influence on the anesthesia effect

In actual operation, the current method of using anesthetics is relatively extensive. In order to ensure that the fish body will not recover during transportation, a relatively high concentration of MS-222 is generally used for deep anesthesia, and the fish is transported after being deeply sedated; Long-term exposure to an excessively high concentration of anesthetic, although the anesthetic effect is guaranteed, will cause excessive accumulation of anesthetic in the fish body, and it will take a long time to get rid of it, which may damage the liver, kidney, heart muscle and muscle of the fish, resulting in the accumulation of lactic acid. death from anesthesia

Eugenol and CO 2 It is also a commonly used anesthetic, but eugenol is volatile, and its efficacy will gradually decrease during anesthesia, requiring a higher anesthetic concentration; CO 2 There are problems such as relatively long anesthesia time and recovery time, difficult to control the dose, and excessive accumulation in the local tissues of the fish will lead to suffocation and death of the fish, all of which are inferior to MS-222

In addition, due to the lag of my country's regulatory system, there is also a lack of authoritative assessment of the safety of anesthetics. Some businesses use illegal drugs in order to ensure the anesthesia effect and reduce costs. Residues in fish can cause serious food safety problems

[0005] At present, live fish are usually transported by putting them directly into containers such as tanks or water tanks for oxygenation, or using plastic oxygen bags for transport, but both have the disadvantages of low survival rate or can only be transported for short distances