Aquaculture process for South American eel larvae

Abstract

The invention aims to provide an aquaculture process for South American eel larvae. The aquaculture process includes cleaning aquaculture ponds, and controlling the water temperatures and the salinity of the eel fry ponds. The aquaculture ponds are soaked or cleaned by the aid of dry quicklime powder, bleaching powder, potassium permanganate, clear water and the like; the water temperatures and the salinity of the aquaculture ponds are controlled in such modes that temperature difference of the ground are regulated, water is blended, salt is added into the water at specified steps, the water is diluted at specified steps and the like. The aquaculture process has the advantages that cleaning optimization schemes implemented before the aquaculture ponds are utilized are optimized by means of exploration, and methods for removing cement alkali are improved; aquaculture pond sterilization modes are optimized; the growth speeds of the eel larvae are increased, eel deformity can be prevented, and the death rates in larva aquaculture periods can be decreased; eel larva releasing modes and salinity regulation modes are modified, and accordingly death of the eel larvae due to temperature or salinity problems in releasing procedures further can be reduced.

Description

technical field [0001] The invention relates to the field of eel culture of marine aquatic fish, in particular to a technique for cultivating eel fry in South America. Background technique [0002] Eel, the scientific name is eel, and its species are commonly known as eel, conger eel, flower eel, bicolor eel, etc. It is an aquatic animal that lives naturally in the ocean. According to marine historical records, it is speculated that the eel spawning sites in China and Japan may be in the Philippines and Malaysia. deep sea among the islands. At present, artificial breeding of eel seed has not been successfully studied and reproduced. Over the years, eel seed resources have mainly been imported from Europe. Now European eel species have been listed in my country's international protection of endangered wild animals and plants. One of the new species of South American eel is an economic fish species introduced in the past two years. At present, the imported South American eel ...

AI Technical Summary

Problems solved by technology

[0003] 1. At present, the specifications and shapes of eels in the construction of breeding ponds and the cement and other materials used are different, and the technology of disinfection and sterilization treatment of the breeding ponds before seedlings is also different; or new The simple method of removing cement alkali in the breeding facilities; or the simple disinfection method is adopted for the old breeding pond; or the disinfection process measures are not effective, or the effect of removing harmful substances in the water soaking pond is poor; or the pond surface is long open and exposed to the sun; Or the slow delay of the residue of hazardous substances leads to slow growth and low yield of eels; or the residue of hazardous substances in the early stage of eel breeding causes eel deformity; or the mortality rate of young eels is high during the breeding period.

[0004] 2. Most eel seedlings are raised in the winter season, and the eel seedling breeding period must heat the water in the breeding pond. The traditional heating method is to directly insert a steam pipe into the water in the breeding pond, and reduce the pressure of the boiler. The steam is directly passed through the water in the breeding pond for heating; or simple heat insulation is used in the breeding pond water, or high-cost heating equalizer equipment is invested, or there is no approved technology for uniform heating facilities, or multiple heating steam pipes are used to disperse Insert it into the water body of the breeding pond, turn on the steam to heat the water body, the generated steam or superheated steam will cause waves and jumps and hurt the eel fry, or when heating the water in the eel fry pond during breeding, use simple steam isolation measures to keep the water in the breeding pond If the temperature in the tank is increased, all the above heating methods will easily cause superheated steam water or superheated water to directly scald the eel fry. In the light case, it will affect the uneven water temperature of the breeding pond water and the breeding process is difficult to control. Increased investment costs

On the other hand, when the eel fry are put into the breeding pond, there is a difference in temperature between the breeding pond and the eel fry breeding bag. If the difference is not adjusted by appropriate means, it will inevitably lead to large-scale death of the eel fry due to the large temperature difference. ; In the early stage, there was no quick and effective way to adjust the temperature difference, which can adjust the temperature difference before the eel seedlings enter the breeding pond

[0005] 3. The eel fry come from deep ocean saltwater fishing, and the eel fry are added with a certain amount of salt in the proportion of seawater salinity during packaging and transportation to maintain a balance process with the salinity of the marine environment; or the eel fry before release The disinfection process of adding salt to the water in the breeding pond to disinfect the surface of the pond; or the technology of desalination of salinity and salt water in the breeding process after seedlings; there are differences and gaps between the depth of the technology and the adaptability of the breeding environment conditions