Misunderstanding of soaking and disinfection of eel seedlings

In many years of fishery production, aquaculture technicians have accumulated rich aquaculture experience. Using salt water to soak and disinfect fish fry is one of the traditional experiences of farmers everywhere. However, in practice, aquaculture experts and some farmers in China have found that the method of soaking and disinfecting fish fry with salt water, which is widely used in other fish, is not suitable for Monopterus Albus culture.

In early 2000, a scholar put forward the view that it is not safe to disinfect ricefield eel with salt water based on experiments. The experiment showed that after disinfecting rice field eel with salt water, the secretion of mucus on the surface of rice field eel increased greatly and fell off (this is a self-rescue response of rice field eel to external stimulation, similar to sneezing before a cold). The weaker ricefield eels died one after another, and the mortality rate was 10% higher than that of the control group.

The experiment carried out by Pan Jianlin of Jiangsu Freshwater Research Institute in early 2000 further confirmed that Monopterus Albus showed more active swimming in ultra-low concentration (0.2%) salt water, but quickly returned to normal, but compared with the control group, there are more flocs at the bottom of the bucket (the product of mucus loss of Monopterus Albus).

In order to further test the safety of saltwater to ricefield eel, we carried out a special experiment in 2002. The results showed that the sensitivity of ricefield eel to salt water was closely related to the water temperature. At the same concentration, the higher the water temperature, the more obvious the response, and the higher the mortality. Under the condition of low temperature, the mortality rate of rice field eel was more than 20% higher than that of the control group after washing ricefield eel with 35% salt water. When 2% concentration of salt water was used to disinfect rice field eel, the survival rate of rice field eel was also significantly different from that of the control group (the mortality rate was more than 15% higher). The experimental results show that there are unsafe factors in the disinfection and leaching of eel with salt water.

Monopterus Albus is a "scaleless fish". Due to the lack of scale protection, it is inevitable that there will be wounds on the body surface of eel seedlings caught in cages or by electricity. Soaking in salt water is tantamount to sprinkling salt on the wound, and the stimulation to Monopterus Albus can be imagined.

The treatment method adopted by Volkswagen Culture Company was carried out in the eel pond, and the antivirus drugs (eel treasure antivirus pioneer) and germicidal drugs (eel treasure silver iodine) were sprinkled in turn. Then combined with internal administration of detoxification and anti-inflammatory drugs (eel bao virus Qing and eel bao rotten skin bleeding powder) to carry out comprehensive treatment. Practice has proved that the effect of this method is obvious.

For those who do have the habit of soaking and disinfecting, we suggest that you can use the following soaking method: in the container of purchase and transportation, add 5 grams of "Yingling" and 2 milliliters of "eel treasure silver iodine" for every cubic meter of water. If the container for purchase and transportation is small and difficult to soak in transportation, it can be soaked in time after being shipped back. The soaking time should be at least half an hour. It was observed that the body surface mucus of the soaked rice field eel was significantly increased and the vitality of the rice field eel was enhanced. Using this soaking method, on the one hand, it can enhance the anti-stress ability of Monopterus Albus, at the same time, it can kill the bacteria on the surface of Monopterus Albus, and there is no stimulation to Monopterus Albus. "Eel Bao antivirus Pioneer" should be used for antivirus treatment after release.