Scaly shovel jawed fish are generally susceptible to diseases

There are data showing that scaly shovel-jawed fish can get anchor head eel disease, and the symptoms are:

Swim slowly at the surface of the water and do not feed, while the fingerlings are extremely emaciated and die sporadically. Sick fish are fished from the pond for examination, the pathogen is the anchor head eel, which is mainly parasitic on the gills, **, head, etc. of the fish, and there are usually 3 or 4 worms parasitic on the dead fish species. The head of the anchorhead eel is inserted into the negative muscles and scales, and most of the body is exposed to the outside of the fish and is visible to the naked eye.

Microscopic examination shows that the worm body is covered with algae and sessile protozoa, and the tissues around the parasite are congested and inflamed, forming ulcers, resulting in secondary infection of bacteria and water mold.

**Method: Sprinkle 90% crystal trichlorfon milligrams of liters on the whole pool for 2 days. After the medication, the disease was well controlled, the number of deaths gradually decreased, and the swimming and feeding of the diseased fish tended to be normal.

Adults can also be bathed in 10 20 mg of potassium manganate for several hours, which can completely kill the larvae and adults of anchor eel.

Summary: As a valuable new species of economic aquaculture, multi-scale shovel-jaw fish has a good breeding prospect, and there are no research reports on its diseases. Anchorhead eel disease is a common disease of farmed fish, and the suitable season for the onset of the disease is generally in the season when the water temperature is 15 23.

It can cause harm to fish of all ages, the main object of harm is the fish species, 3 4 worms parasitism can cause death, and even 1 2 worms parasitism can also make the negative species stagnate growth, the body is thin and weak, and even produce deformed bending. Adult fish are infected with this disease, and the fish gradually weakens and loses their edible value. After the broodstock is sick, the negative body is emaciated, which affects the development of the gonads.

Due to the high market of white turtle, it is more delicate and sensitive to environmental requirements, so the concentration of drugs should be strictly controlled. When administering the medicine, the water surface should be lowered as much as possible to achieve better efficacy and prevent discomfort in the fish, so that water can be added to rescue it.

For the first class of anchor head eel disease, it has been relatively successful in breeding, mainly by strengthening water quality management, regular disinfection, reasonable stocking density, strengthening feeding management, and enhancing its own resistance to prevent infection.

Sabi syndrome, wodoubuzhidaoshenmazheng is such a simple question.

The body is long, slightly flattened, slightly raised on the back, and the abdomen is rounded. The head is short, the snout is blunt, the mouth is subordinary, transversely lobed, and the corners of the mouth extend to the lateral margin of the ventral surface of the head. mandibular margin with sharp keratin; There are 2 pairs of whiskers, the upper jaw whiskers are very small, and the corners of the mouth are also very short.

The dorsal fin is devoid of hard spines and the outer margin is slightly concave. The scales on the chest are small and buried under the skin. The back of the body is black-brown, and the abdomen is grayish.

Each scale has a crescent-shaped black spot at the base of the lateral body, the dorsal and caudal fins are grayish-black, the other fins are grayish-yellow, the outer edges are golden-yellow, and the dorsal and anal fins have an orange-red marking.

The population is large in the production area, especially in the mountainous area of southern Shaanxi. In mid-April, when the fish school comes out of the spring, the quantity is very large, some larger fish springs can reach more than 10,000 catties at most, generally more than several thousand catties, and the small fish fry are also more than 100 catties, which is the special product of the mountainous area that the local people like to eat. In the future, if its natural resources can be conserved and technical problems such as artificial reproduction can be addressed, it will be a promising farmed fish in mountain fisheries.

The scaly shovel-jawed fish meat is tender and fresh, and has the effect of nourishing and brightening the eyes.

The contents of water, crude protein, crude fat and ash in the muscle of multi-scale shoveljaw fish were ., respectively01% and. The fish muscle contains a total of 18 kinds of amino acids, and the total content of amino acids is, of which the total content of 7 essential amino acids is accounted for of the total amino acids. The total content of the four umami amino acids was as follows, accounting for the total amount of amino acids; The essential amino acid index is:

Among the fatty acids contained in muscle, saturated fatty acids: monounsaturated fatty acids: polyunsaturated fatty acids are 3 4 3, and the ratio is reasonable; The content of EPA and DHA is higher, respectively

20%, indicating that the scaly shoveljaw fish has high food value and health care effect.

It is distributed in the middle and upper reaches of the Jialing River system and the Han River system, the upper reaches of the Huai River, the Wei River system, the Yi River, the Luo River, the Hutuo River in the upper reaches of the Haihe River and Mount Tai in Shandong.