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Comprehensive prevention and treatment of fish hepatobiliary syndrome
In recent years, with the increasing intensity of aquaculture, the incidence of fish hepatobiliary syndrome is getting higher and higher. Hepatobiliary syndrome can occur in all kinds of farmed fish, especially carp and grass carp, and the incidence of adult fish is generally high. There are many causes of hepatobiliary syndrome in fish, which can be summed up in the following aspects. ⑴ pathogenic microorganism infection. Such as Aeromonas hydrophila, Edwardsiella and pathogenic microorganisms such as rhabdovirus and reovirus will directly or indirectly cause hepatitis in fish. Pathogen microbiosis
2019-01-16 -
Blind fishing will cause the death of fish. Autumn freshwater fish fishing beware of flooding ponds.
Blind fishing will cause the death of fish. Autumn freshwater fish fishing beware of flooding ponds.
2018-07-11 -
Common causes of death of fish and its prevention
Due to farmland irrigation and the ebb and flow of the tide, the frequent flow of river water, the increased opportunities for the inflow of polluted water into the fish pond, or the pollution of the fish pond itself and sudden changes in the weather will cause dead fish. In order to enable farmers to accurately identify the cause of death of fish in daily production and management, and to take timely measures to prevent the occurrence of dead fish, this paper introduces the diagnosis and prevention of dead fish in several cases: 1, fish disease and dead fish 1, water condition: the entry and drainage of pond water can only be completed under artificial control, mostly closed.
2019-01-16 -
Great loss of benefit from damage to fish liver how to prevent and treat fish hepatobiliary syndrome
Great loss of benefit from damage to fish liver how to prevent and treat fish hepatobiliary syndrome
2018-07-11 -
What is the cause of the death of fish in winter? How to prevent overwintering death?
According to data, the average mortality rate of fish species caused by improper overwintering reaches 15% every year, and the mortality rate in North China is as high as 20%, sometimes more than 30%. Because of the decrease in the number of fish species, which leads to the shortage of fish stock in the second year, directly
2020-11-11 Fish species winter death cause what is it how prevention according to -
Symptoms and treatment of parrot fish enteritis
Symptoms and treatment of parrot fish enteritis
2018-09-08 -
Principles of fish health management
The concept of fish health management is that fish culture under such conditions will achieve the best growth rate, feed conversion rate, reproduction rate and survival rate. It is very important to maintain a high-quality water environment and feed with balanced nutrients to maintain the health of fish and prevent them from getting sick. Proper fish health management should aim at environmental, nutritional, economic and other factors to prevent fish diseases rather than focus on the treatment of fish diseases. Here are some basic principles of fish health management. First, to treat the environment
2019-01-16 -
Causes of fish poisoning caused by copper sulfate
Copper sulfate is a commonly used drug for the treatment of fish diseases, but it often causes some harm because some users are not familiar with the medicine. Case 1: in March 1987, copper sulfate 0.7g/m3 was used to kill moss in parent fish pond in Liantang Aquatic Farm, and all parent fish died three days later. Water quality analysis, ammonia content 0.35g/L. Example 2: from August 30 to 31, 1999, a 0.67hm2 fish pond with a depth of 1m was raised by farmers in Bayi Township, Nanchang County, due to stuffy weather.
2019-01-15 -
Hangtai Aquarium: six factors that easily lead to illness or death of fish
There are many causes of fish illness, not all of them are infectious diseases. Only by observing carefully and finding out the real cause can we prescribe the right medicine to the case. Today, the editor will share with you about the non-pathogenic causes of fish disease. First, mixed culture of the same kind of fish, or.
2018-08-13 -
Disease prevention and control techniques of goldfish
Disease prevention and control techniques of goldfish
2018-07-24 -
Several causes and prevention of floating head of fish
The "floating head" of fish is a common phenomenon in aquaculture production, and it is also an important sign to judge whether fish get sick or not and the change of water quality. However, many farmers do not understand the cause after discovering the "floating head" of pond fish, and drug administration only based on "experience" is often ineffective and even lead to a large number of deaths. In fact, the floating head of fish can be caused by a variety of factors. According to the cause, "floating head" can be divided into the following three types. The anoxic floating head is due to the low content of dissolved oxygen in the water and the farmed fish swim to a relatively high surface.
2019-01-16 -
How to judge fish pollution poisoning
Fish death may be caused by disease, hypoxia, poisonous algae, mechanical injury, pollution poisoning and other causes, and pollution poisoning is the most common cause of death. The following introduces several naked eye judgment methods of common pollution poisoning for reference in production. Heavy metal pollution poisoning. Heavy metals refer to metals with relatively high density, such as lead, manganese, zinc and so on. The gills of poisoned fish are grayish white and secrete a large amount of mucus, forming flocculent deposits, which block fish gills and cause respiratory disorders. Poisoned fish often float on the surface of the water.
2019-01-16 -
Pay attention to fishing in autumn
First, choose a good fishing time. When fishing, choose before and after dawn when it is sunny and the fish do not float their heads. At this time, fishing has the least impact on pond fish, and the fresh fish caught can be supplied to the morning market in time. When haze, muggy weather and pond fish have floating heads or fish diseases, it is not appropriate to draw nets to catch fish, so as not to cause a large number of dead fish and cause unnecessary economic losses. Second, stop eating or feeding less before capture. Stop eating or reduce the amount of feed the day before fishing, and do not feed a large amount of concentrate to increase the weight of fresh fish on the market. Because of
2019-01-15 -
Prevention and control techniques of common diseases of freshwater fish in spring
The water temperature began to rise in spring, and a variety of bacteria and parasites that could cause disease began to multiply in large numbers. At the same time, after overwintering, the physique of fish was weak, and its resistance to pathogenic factors was relatively poor. It was easy to be infected with various diseases, causing a large number of deaths of pond fish and breeding.
2020-11-08 Freshwater fish spring frequent disease disease control technology -
The common mistakes in fish disease prevention and control
The common mistakes in fish disease prevention and control
2018-07-14 -
Malnutrition causes fish diseases
With the rapid development of factory breeding, formula feed is used more and more widely. However, some formula feed can not meet the nutritional needs of fish due to raw material problems or preparation technical problems. In particular, the feed designed and produced by small feed factories and farmers may cause undernutrition or overnutrition, which will lead to the decline of fish physique and, in serious cases, fish death. This paper will discuss the causes of fish diseases from the aspect of nutrition, in order to guide farmers to take timely measures to prevent fish diseases in culture production.
2019-01-16 -
Causes of overwintering death of fish species and its management measures
Causes of overwintering death of fish species and its management measures
2019-12-18 -
Prevention and treatment of common diseases in Pseudosciaena Crocea culture
Benedeniasis [etiology] Benedenidosis is caused by parasitism. [symptoms] Benedenia is often parasitic on the body surface of large yellow croaker, yellowfin sea bream, red sea bream, black sea bream, grouper and other marine fish, especially in the first half of the back. When Benedenia parasites on the fish, the fish are restless in the water, swim crazily, rub against the net or pool wall, tear the epidermis with the size hook of the fixed plate behind the worm, injure and inflame the body surface, and secrete a large amount of mucus. In severe cases, anemia, weight loss, local or large area ulcers on the body surface or appear
2019-01-15 -
What if the fish of the god of wealth fall off the scales? what if the fish bite each other?
The god of wealth fish is what we often call parrot fish, which is currently distributed in many countries in the world. The main value of the god of wealth fish is to watch, its appearance is very strict, so many people like to raise it at home. However, in the process of breeding, it is also possible
2020-11-08 God of Wealth fish drop scales what to do fish each other bite fish that is -
Technical measures to reduce the death of spawning parent fish
Reducing the death of spawning parent fish is an important technical work in fish fry culture. There are two main factors causing the death of parent fish in spawning. One is that parent fish consume a lot of physical energy in the process of spawning and reproduction, which increases the side effects of spawning drugs and reduces the resistance of parent fish. If the fish is seriously injured, various pathogens will take advantage of the opportunity to infect the fish and cause disease, resulting in the death of the parent fish. Second, the physique of the parent fish is poor, or the water temperature changes greatly during the induction of labor, and the improper dose of the drug (the dose is too high or too low), the parent fish can not give birth normally.
2019-01-16