Text/Figure Li Jiang, Xinmukang Aquatic Products Business Department, Shiwan Town, Boluo County
Aquatic frontier Li Jing finished
China Aquatic Products Channel exclusive report, since the beginning of spring this year, the weather is abnormal, sunny and rainy, the temperature difference is larger, the water environment changes greatly, especially the water nitrite and ammonia nitrogen indicators are repeatedly high or exceeded, the total alkalinity of the water body is extremely low, the water pH is repeatedly acidic, the fish body's own resistance is poor, plus around April is the osmanthus fish ovulation (loose spring) stage, the comprehensive problem of osmanthus fish is more prominent.
1. Stubborn gills (gill filament congestion or bleeding, gill filament ulceration, increased mucus, gill cover bleeding, rotten gill cheek, etc.);
2. Turbidity of water (white turbidity), liver and gallbladder problems (flowers, white liver, gallbladder enlargement, blackening);
3. Back hemorrhage, abdominal cavity or gastrointestinal hydropage (accompanied by intussusception), proglossia (redness), fin-based hyperemia or bleeding, reproductive glands (seminal vesicles or oocyst hyperemia or hemorrhage and swelling) and so on.
In the case of the above problems, in fact, it is necessary to return to the fundamentals, carefully analyze the close relationship between pathogens, water environment and body, raise fish first, and raise water more. It is recommended that the method of water transfer and bottom change is as follows:
1. You can choose to splash water and detoxification drugs throughout the pool, strengthen their own resistance and the improvement of immunity, rely on the fish body itself, and effectively resist the invasion of pathogens;
2, should pay attention to the restoration and improvement of the water body and the bottom environment, this work should be adhered to in the breeding process, a good environment can effectively enhance the fish body's own immunity, it is impossible to provide a good breeding platform for pathogenic microorganisms, we must build a good environment for osmanthus fish breeding, maintain refreshing water quality, try to avoid the emergence of turbid water bodies, reduce the burden and pressure of the gills and liver of the fish body, and deal with turbid water. Maintaining a good water color is a prerequisite for stable water quality, and it is also the basic requirement for the environment for the healthy breeding of osmanthus fish.
3, osmanthus fish eat a large number of live fish bait, and the bait coefficient is high, a large number of waste organic matter accumulates at the bottom of the pond, the bottom of the pond can be described as a hotbed for the propagation of pathogens, so regular bottom change is a process that must be carried out. It is recommended that every 10 days or so, choose the bottom modifier and oxygenator, completely improve the bottom environment, decompose too much organic matter, and reduce the accumulation of harmful substances at the bottom.
The current problem of osmanthus fish ovulation (loose spring) period is actually directly related to the deterioration of water quality and the decline of fish physique, and it is recommended that farmers can try the following methods:
2. Strengthen oxygenation, put oxygenating particles at night to ensure that osmanthus fish can breathe enough dissolved oxygen;
3. Increase the resistance and immunity of the fish body, which can increase the supplement and absorption of vitamins and minerals and trace elements;
4. Strengthen the detoxification and anti-stress work of water bodies, improve the self-purification ability of water bodies, and ensure that the water environment is refreshing. For some stubborn gill problems, the cause must be ascertained, in addition to excluding parasites (such as intracula, anchorworm, etc.), try to adjust the water quality first, and then consider the choice of drug treatment for bleeding, gills and sterilization, the situation is serious, it can be used for 2 consecutive times.
In addition to paying attention to water transfer and bottom change, many osmanthus fish now frequently have liver and gallbladder problems, especially gallbladder, blackening, and internal bleeding, which is obviously directly related to unreasonable feeding, decreased immunity of fish body, metabolic imbalance, excessive medication, but will make it worse.