What are the symptoms and control methods of common sturgeon diseases?
Sturgeon is one of the most primitive vertebrates, with extremely high research value and economic value. China began farming sturgeon at the end of the last century, and after more than a decade of development, it has reached a certain farming scale. With the increase in intensive farming, diseases have also risen, severely harming farmers' economic returns and adversely affecting the reproduction of the sturgeon farming industry. Below, the editor brings you some common diseases in sturgeon farming and their control methods. Let's take a look.
1. Septicemia
Septicemia is a bacterial disease, and the pathogen is Aeromonas hydrophila. This pathogen is widely distributed in natural water bodies, so this disease is extremely common in sturgeon farming. When the disease occurs, sick fish move slowly, their food intake decreases, and bleeding appears on the body surface such as the abdomen, mouth cavity, and fins. The anus becomes red, swollen, and inflamed, and the gills are pale in color. After dissecting the sick fish, the liver is found to be enlarged, and the stomach and intestines are inflamed, accompanied by foamy mucus.
Control methods: Strengthen water quality management, promptly add new water or change the water, choose fresh feed when feeding, and avoid feeding spoiled or rotten feed. At high temperatures, promptly remove residual bait and excrement to prevent fermentation from producing toxic substances. Regularly disinfect the water body, add some antibacterial drugs and vitamins to the feed. When decay occurs, splash chlorine dioxide over the whole pond for disinfection, then feed with 2.0g of enrofloxacin mixed into the feed.
2. Enteritis disease
Enteritis disease is also a bacterial disease, and the pathogen is Aeromonas punctata. When the disease occurs, sick fish move sluggishly and completely lose their appetite. When the sick fish are taken out for examination, the anal area is found to be red and swollen, and pressing the abdomen gently causes yellow mucus to flow out. Dissection reveals congestion and inflammation in the stomach and intestines, with accumulated yellow mucus.
Control methods: Keep the water clear, and be sure to ensure the freshness of natural bait when feeding. For artificial feed, it is recommended to choose complete-formula feed with a moderate particle size, and feed at fixed times and in fixed amounts. When the disease occurs, splash bromochlorohydantoin over the whole pond for disinfection, then add oxytetracycline to the feed for feeding.
3. Gill rot disease
Gill rot disease is a disease caused by Flavobacterium columnare. When the disease occurs, sick fish move slowly, the body surface color is pale, and the gill filaments inside the gills become white with no blood color. In severe cases, they rot in patches and mix with mud to form gelatinous mucus. It mainly harms juvenile fish and young adult fish.
Control methods: Keep the water clear, and splash lime over the whole pond once every half month. When the disease occurs, splash chlorine dioxide, then soak the sick fish in salt water for a period of time, and add oxytetracycline to the feed and feed it mixed with bait; recovery can be achieved.
4. Trichodiniasis
Trichodiniasis is a parasitic disease, and the pathogen is some parasites of the genus Trichodina. When the disease occurs, the body surface of sick fish is pale and lusterless, the body is emaciated, and swimming is weak and sluggish. Opening the gills reveals dark red gill filaments with a large amount of mucus. Microscopic examination reveals a large number of Trichodina parasites. It mainly harms seedlings and often gathers in the gill slits of fish, damaging the gills, causing breathing difficulty in sick fish and leading to death in severe cases.
Control methods: When the disease occurs, place the sick fish in low-concentration salt water and soak for 30-60 minutes. After soaking, put them into a flowing water area, which can improve or cure the condition.
The above are the symptoms and control methods of common sturgeon diseases. I hope it can help you. To learn more about sturgeon farming knowledge, please stay tuned to us.