In the process of koi farming, diseases caused by neglect of prevention often bring huge losses to family lovers. Therefore, it is necessary to adopt the principle of "giving priority to prevention and emphasizing prevention over treatment." The so-called "prevention first" strengthens the prevention of koi diseases.
So, how to prevent it? The author thinks. It is necessary to adopt a comprehensive prevention and control method that combines ecology and drugs, create an excellent water environment, strengthen water quality regulation, and pay attention to drug prevention. Only in this way can we effectively prevent and control diseases in the feeding process.
In the daily feeding process, enthusiasts must know more or less which abnormal behaviors of koi are precursors to the onset of the disease, and the author will summarize some abnormal behaviors that may cause diseases.
Judging the cause of the disease and preventing the outbreak of serious diseases according to the abnormal behavior of the fish is what ordinary hobbyists must understand to reduce losses.
Koi → carp freshwater fish, in the artificial breeding and breeding process, because of human intervention, some "mutated" varieties of disease resistance, far less than close to the "real carp" so strong, for example, "Yu Sanjia" disease resistance is far less than monochrome carp, the same Ashkenazi koi disease resistance is also stronger than the "Yu Sanjia".
In the process of raising koi in order to pursue the "growth rate and body shape" synthetic feed and feeding method will cause serious digestive system problems, resulting in "no warning" death, which is easy to appear in the "adult fish", overload feeding, temporarily can pursue a strong body size and growth rate, when the fish is sold its consequences are also unpredictable.
Judging the cause based on the abnormal behavior of the fish requires many years of experience in practice or breeding, because many abnormal behaviors of koi are similar.
For example, chestnuts: parasites, fins "shake, shake" fish rubbing the bottom of the tank, swimming sharply, jumping, excitement, feeding rate reduction, are all manifestations of parasites, but there are many types of fish parasites, the symptoms of each parasite are many similarities, how to correctly judge what parasites, need to be based on the season, water temperature, body surface symptoms and other abnormal performance of fish, in order to roughly judge accurately, the most effective way is to believe in science, with microscope observation.
The average player may feel that some symptoms have been observed, the insecticide is not good, especially recently contacted some beginner players, was stunned and stunned, in fact, they also want to raise koi also to learn, a variety of Baidu check information, but the more you look at the more confused, the author wants to say that there is no universal insecticide, no universal insecticide, no universal insecticide, the important thing to say three times, each kind of parasite needs different drugs to get rid of.
Abnormal behavior is abnormal behavior and deviation behavior that occurs during the process of breeding.
Most of the abnormal behavior that most people know about the abnormal behavior of the fish wiped the body "rubbing the tank, rubbing the pool" This is a parasite, it is time to kill the insect, but it is not clear what the insect is.
In the case of no way to do microscopic examination, you can judge what kind of insect it is by synthesizing a variety of symptoms, the author has many years of experience in the industry, but I dare not guarantee that I can accurately judge with the naked eye, but it is just a high probability, believe in science, and must be microscopic.
Several common parasites exhibit different abnormal behaviors, or symptoms.
Ringworm disease (three generations of worms)
Ringworms are very common parasites in koi culture, parasitizing the body surface and gills.
Time: Most of this insect occurs in spring and autumn, and koi cement ponds are raised as perennial polyparasites.
Symptoms: rubbing the pool, wiping the body, increasing mucus on the surface of the body, touching the fish body with a lot of mucus with the hand, the upper part of the gill cover of the head will appear flaky white film, the white film is blurred on both sides, the thicker it is closer to the center, and the hand fin will be reddened (hyperemic) near the fish lift.
In large quantities of life planning, the gill filament mucus of the sick fish increases, the gill filament swells, the gill lid of the sick fish is opened, and the breathing is slow.
The initial stage of parasitism does not affect the feeding rate, and abnormal symptoms are only severe when a large number of parasites, especially on gills.
Chakra worms
Time: Most of this insect occurs in May-August, due to the north and south regions, the wheelworm epidemic peaks at water temperature 20-28.
Symptoms: body rub, rapid swimming, jumping (diving at night) fish will be more excited, while the body surface will also appear white film, the body surface will mostly become white film circles, severe will destroy the skin, there will be dot-like rotten flesh, the lesion in addition to the center of the will be covered with white film, a large number of parasitic gill filaments, gill tissue will rot, resulting in death.
Bodou worms
Time: This insect can be seen all year round, high in the low water temperature season, water temperature below 28 degrees Celsius one-year-old fish is mostly common.
Symptoms: This insect parasitizes in the early stages of no obvious features, whether it is the fish appetite or body surface are not obvious special diagnosis, when a large number of parasitism, the body surface and gill filament will be covered with a layer of gray-white mucus, can appear in any position, the serious is that the fish will only swim slowly in isolation, loss of appetite or even do not eat, in the parasite will be congestion, inflammation, decay, or the number will also cause local scales.
Abnormal behavior (lying on the ground)
The koi do not like to swim, or even do not move, the abdomen is close to the bottom of the pool, the back is facing up, often lying in one place, and there will be epidermal lesions in the abdomen for a long time.
Causes: Mainly believed to be over-feeding, indiscriminate use of drugs, vitamin deficiency and nutritional imbalance, most of this phenomenon of koi with intestinal congestion, indigestion when ascites, rotten gills and other symptoms.
Abnormal behavior (floating head or solo discord group)
Originally wanted to talk about it separately, but many times this situation has a lot to do with rotten gills, especially floating heads, gill filaments are abnormal, hypoxia, adult fish appear floating head swimming alone, in the absence of parasite infection gills, most of them are related to the physique of fish.
Symptoms: Swimming alone, unsociable, floating head these three conditions will appear no appetite or feeding rate underground.
Causes: multiple possible parasitic infections of the gills, bacterial gills, enteritis ascites, hepatobiliary syndrome, poisoning and so on.
Abnormal behavior (flush)
Symptoms: Koi prefer to hedge at the outlet
Causes: Flushing inlet phenomenon is normal behavior when turning water, and gill disease occurs during feeding.
It is normal for koi to appear flushing and jumping out of the water after changing the water body.
The above are all personal views, welcome to leave a message in the comment area to discuss mutual learning, do not spray!