The reason and solution of sea bass not eating food

In Chinese, there are four kinds of fish can be called sea bass, namely: sea bass, the scientific name Japanese sea bass, distributed in coastal waters, and estuarine interchange of seawater and fresh water. Songjiang perch, also known as four-Gill perch, is a falling sea migratory fish, the most famous. Big mouth sea bass, also known as California bass, is a new species introduced from the United States. River perch, also known as red perch, Wudao black, is native to northern Xinjiang.

The phenomenon of fish ponds when the weather turns cool

After entering October, as the weather gradually turned cooler and the temperature dropped continuously, the following phenomena appeared in the fish ponds:

1. Food consumption slows down and decreases at the same time

2. Some of the pond water bodies become thicker and some clear.

3. Some fish ponds have begun to eat nothing for a long time.

The reason why the perch doesn't eat food.

The main results are as follows: 1. With the decrease of air temperature, the activity of fish decreases, and the change of water temperature (poor water mobility of upper and lower water bodies, which is easy to cause problems such as returning to the bottom, etc.), leads to the decrease of food intake.

2. Due to the low temperature environment, the sunlight is not enough, the photosynthetic capacity of algae and fungi is weakened, and the oxygen production is reduced, which leads to the decrease of dissolved oxygen in water. A large amount of organic matter can not be decomposed, and sometimes the phenomenon of algae fall occurs.

3. The decomposition ability of the pond itself decreased. Due to the feeding of a large number of ice fish bait from August to October (especially the obvious decline in the quality of ice fish in the later period), a large amount of residual bait feces accumulated at the bottom of the pond, and the organic matter rotted and deteriorated at the bottom of the pond due to the untimely change of bottom. A large number of toxic and harmful substances (high ammonia nitrogen and nitrite) were produced, which affected the normal physiological function of the fish.

4. Artificial improper management has caused the fish ponds to be in a sub-healthy ecological environment for a long time (changing water no more than 3 ~ 4 times a year). At the same time, in order to increase the feeding amount, they do not hesitate to use irritant drugs every day to make the fish dependent. One day without irritant drugs, the food on that day is significantly reduced, or even not eaten, and at the same time, once the fish is sick, the effect of ordinary conventional drugs is weakened. Large doses of antimicrobial disinfectants must be used to cause great damage to the normal physiological function of fish.

Suggestions on solving the phenomenon of sea bass not eating food

1. In the near future, the pond should pay more attention to the cleaning of the bottom of the pond, and timely use "superparticles" to improve the bottom of the pond and degrade toxic and harmful substances.

2. Change the water frequently (15-500px each time) to keep the pond water fresh. At the same time, the low temperature state should supplement a large number of nutrient fertilizer "algae power" and supplement the low temperature dominant algae species-"diatom source". Balance the balance of algae and bacteria in water and improve the dissolved oxygen in water.

3. Feed according to the actual situation of Tangkou, at the same time, it is suggested that a small amount of "jiedubao" + "good Cmur100" should be used to decompose the organic matter in water to enhance the anti-stress ability of water body. Enhance the anti-stress ability of fish.

4. For reasonable feeding and healthy breeding, oral nutrition can be used instead of irritant drugs, so as to avoid the stress reaction caused by the use of a large number of irritant drugs and avoid the risk reasonably.

Culture of perch in pond

1. Pond conditions and preparation: the pond area should be 3300m2-6600m2, the water depth is more than 2m, the water source is sufficient, the water quality is pollution-free, and the water intake and drainage facilities are good and the transportation is convenient. Before stocking, dry ponds should be desilted, slope protection should be leveled, quicklime 750kg-1050kg per hectare should be used, pool water should be kept 10-20cm, and slurry should be soaked and sprinkled. Seven days later, the water was added to 1m deep. In order to keep the water quality in good condition, diammonium 75kg/hm2 could be applied once. After two days, the pond water turned oil-green and then it could be stocked.

2. Temporary rearing and stocking of sea bass: sea bass fry are mostly caught by sea at present, and about 2.5cm-4cm in spring. Fish body will be injured in different degrees after fishing and transporting operation. In order to improve the survival rate of culture, intermediate temporary culture can be carried out first. In the temporary culture mode, it is more convenient to set up 40 mesh cages in the pond. 2000-3000 seedlings per cubic meter of water, sterilized with 1 × 10-6-2 × 10-6 chloramphenicol, furazolidone after eating surimi. In the first 10 days, Artemia larvae or freshwater horns and copepods were fed, and then fresh surimi was fed. The fish species were cultured to about 10cm and put into the culture pond at the rate of 1.5ind / m ~ 2.

3. Nurturance management

① feeding: the bait is mainly low-breeding mixed fish, supplemented by artificial ingredients. The sea bass grabs food quickly and contains a lot of food, so it is very important to feed it regularly and quantitatively. When feeding, you should know that the fish are full without wasting bait. In each feeding, the amount of feeding should be increased when the fish is attracted to the surface to grab food, and the feeding should be stopped when the fish sinks and does not grab the food. the daily bait times and amount vary according to the season. The sea bass was fed 4-5 times a day in the suitable temperature season for rapid growth, 10-30% of the fish body weight, and 2-3 times a day in the early spring and late autumn of low temperature, accounting for 1-10% of the fish body weight.

② pond patrol inspection: patrol pond observation in the morning and evening, and deal with abnormalities in time. The contents of pond inspection include fish activity, changes in pond color, smell, transparency, pond escape prevention facilities and enemy damage, and so on.

Bass is very common in our country, which is different from other crucian carp. Perch is a kind of fish with less spines and fresh meat, which many people like to eat, and its nutritional value is very high, which is rich in protein. It is especially suitable for some children and the elderly.