Have you ever encountered in aquaculture, obviously you can't see what the symptoms of fish have, but will die inexplicably? It makes you helpless and at the same time a headache! This is not something that a few of you have encountered recently!
A few friends who farm California perch called and said that the fish had been eating more and less recently, and there had been an inexplicable death, asking what was going on? Asked him about the situation there, there is no problem with the water quality, and I have not used any medicine recently, all the conditions are still OK, that is, there is a situation of dead fish.
At this time, I remembered that the customer encountered such a problem a few days ago, and then after being tested to be a case of trypanosomiasis, I thought that maybe this friend should also be such a problem, so I let him go to the test, by the way, talk about the prevention and control measures of this disease.
Trypanosomiasis characteristics
Trypanosomiasis lives in fish is more complex, will last in the body for a week of lurking, and it is hidden in the blood, so it is not easy to be found, this period of mass reproduction, sucking nutrients in the blood, and eventually leading to the death of the host.
If the fish body has decreased appetite, drowsiness, and pallor of gills and enlarged spleen, there may be trypanosomiasis, so timely detection, observation with a microscope, if you see a twisted movement between blood cells, basically can be diagnosed.
Prevention and control measures
At present, there are no insecticides on the market to deal with trypanosomiasis, and many traditional Chinese medicine types of insecticides have not been well treated for long-term internal use, but the liver has been found to be worse, and more dead fish have been further induced by bacteria infection. Our prevention and control ideas are mainly insect repellent prevention, supplemented by liver protection to enhance the system and improve the water environment, and prudent use of irritating insecticides.
1, 7-10 days to check the liver of fish, regular internal administration of Lechang, Lechang mainly contain eucalyptus essential oil, can penetrate the cell membrane of the worm body, destroy the integrity of the trypanosomiasis cells, to achieve a good deworming effect.
2, regular liver protection, the liver is an important immune organ of California perch, poor liver can easily lead to disease invasion, only California perch liver is red and shiny, in order to reduce the occurrence of disease. Therefore, it is necessary to regularly take bile acid to protect the liver, repair the environment, liver damage caused by overfeeding, and maintain liver health.
3. Increase the water level, regularly change the bottom and replenish bacteria, and maintain a good water quality environment. There are fewer trypanosomiasis with good water and good bottom, but with the increase of feeding in the middle and late stages of breeding, the substrate and water quality become worse and worse, which requires us to regularly change the bottom, especially strong oxidation and bottom change. Replenish bacteria frequently, keep the water body refreshing, and reduce trypanosomiasis.
The article is transferred from the "California Perch Frontier" WeChat public account.