Yellowfin seabream, also known as yellow foot standing, standing fish, etc., belongs to the seabream family, widely distributed in the coastal coastal waters, is one of the important economic fish in the coastal coast of China in recent years. The yellowfin seabream is rich in nutrients, delicious meat and high economic value of aquaculture, so in the marine and brackish water aquaculture industry, it has brought considerable economic benefits to farmers. Yellowfin seabream is a shallow sea warm water demersal fish, but the temperature in the early stage of fry is weaker than that of adult fish, the survival temperature of fry is 10 °C ~ 35 °C, the most suitable water temperature for growth is 24 °C ~ 28 °C; adult fish can resist low temperature of 2 °C and high temperature of 35 °C, the most suitable water temperature for growth is 24 °C ~ 30 °C, which is a wide salinity fish; generally salinity fry is between 0.3 ‰ and 4.3 ‰, and adult fish can survive in light seawater. Residents of coastal areas of Guangdong, Hong Kong, Fujian and Guangxi love to eat this fish, and the price is 2-3 times higher than that of black standing fish.
In recent years, bad weather, polluted water sources and high-density aquaculture have caused various diseases in the culture process of yellowfin seabream. The main diseases and prevention and control measures are as follows:
<b>1. Diseases caused by parasites</b>
Parasites are cultivated all year round, but the epidemic season is generally from November to April of the Yu year, the most common are wheel worms, ring worms and small melon worms, a large number of parasitism in the gills, causing the gills to be infected with bacteria and rot.
<b>The main reasons:</b> long-term rain, low temperature weather caused by low dissolved oxygen at the bottom of the pond, and then a weak light, in this case affects the reproduction of beneficial algae and fungi, coupled with the lack of timely supplementation of the elements required for algae in the water body, long-term do not pay attention to changes in water quality, only pay attention to disinfection, insecticide, resulting in dead algae in the water body sinking to the bottom of the pond, as well as the bottom of the pond bait, feces, etc., the bottom of the pond organic matter is too much, water-loving aeromonas, Vibrio and other harmful bacteria multiply in large quantities, causing pond bacteria, algae imbalance, Thus creating a pond.
<b>Prevention and control measures</b>
(1) Take the sample to the microscopic examination, see if there is parasite parasite parasite in the gills and body surface, if there are parasitic fish with wheelworms, ringworms, small melon worms, the first will appear dark swimming or wild swimming phenomenon, at this time it is recommended to first use the degradation spirit + super C to stabilize the mania of the fish, at night with the six control bottom health + granules god to increase the bottom dissolved oxygen, to create a good pond environment, the next day with insects to inhibit the parasitism of insect pests, can be used twice; often use six control bottom health + granules + black odor net to improve the environment at the bottom of the pond, reduce the occurrence of diseases and insect pests.
(2) In the breeding process, the water quality should be maintained tender, and the indicators of water quality should be often tested to be normal, and green dew or B&A are commonly used to control harmful algae and inhibit the reproduction of pathogenic bacteria.
(3) If the pond is often disinfected with chlorine preparations or iodine preparations, it should be detoxified with water purification king or detoxification super cool in time, or detoxification spirit + hundred herbs to detoxify, eliminate various toxins in the water body, and timely use lactate treasure + six anti-cultivated algae paste + quick supplement kang or Tere calcium to maintain the balance of algae bacteria in the water body.
(4) Prevention is more important than treatment, that is, to improve the immunity of fish, in order to effectively control diseases and insects, internal use of liver and gallbladder Bikang + Jinduowei + enzyme food-inducing treasure, a group of 100 ~ 160 pounds for mixing feeding, 1 to 2 meals a day, even feeding 5 to 7 days for a course of treatment.
<b>2. Rotten body bleeding disease caused by bacteria</b>
Generally due to the fact that the bottom of the pond consumes more oxygen and organic matter, resulting in low dissolved oxygen in the overall environment of the pond, in the absence of salinity and low temperature, resulting in a large number of pathogenic bacteria breeding, especially mold (water mold), it is very easy to infect the fish body and cause rot, resulting in serious body surface ulceration and bleeding. The onset of the fish has poor physical strength, likes to swim alone or lie on the edge of the pond, the fins and other diseased parts produce mucus, congestion, the fins are red and scattered, with the development of the disease, the affected part ulcerates, the epidermis falls off, bleeding, the serious muscles are exposed, do not feed, and swim on the surface of the water.
(1) First use black odor net + granule god whole pond dry sprinkling, remove the oxygen consumption factors at the bottom of the pond, and then use green kang dew + Sanbi kang to control the breeding of harmful bacteria, promote the healing of wounds, and use it twice; the next day, use the degradation spirit + hundred herbs to detoxify the algal toxins and mycotoxins of the water body.
(2) Daily maintenance of water quality and substrate should be done, alternating the use of black gold god + lactic acid treasure + live bacteria king, six anti-cultivated algae paste + new live bacteria king + quick supplement.
(3) Take sanbikang + hepatobiliary bikang + jindowei + enrofloxacin mixture internally, the principle of subtraction without reducing the drug, mix a meal every day, and feed for 5 to 7 days.
<b>3. Streptococcus disease caused by high temperature weather</b>
Mainly occurs during high temperature, the initial body surface is generally no damage, there is no abnormality, observe the eyeball to produce cataracts, pupil dilation, eyeball crystal congestion protrusion, with the development of the disease, the eyeball began to fall off or ulcerate. In recent years, some farmers often use strong irritating disinfectants, which not only destroy the mucus on the surface of the fish, but also directly affect the liver, bile throbbing and digestion and absorption systems of the fish, and the disinfectant does not play a good role in controlling this bacteria; coupled with the daily management of the substrate is not in place, a large number of harmful bacteria breed, and at the same time, with the increase in temperature, streptococcus multiply, invading the fish and Eel Vibrio, Aide Fahrenheit bacteria cross infection, causing serious harm.
(1) Increase the water level, open the aerator every day, use black odor net + six control bottom health + grain god to improve the bottom environment of the pond, and use B&A + green kang dew as a water body disinfection from time to time.
(2) Use new bacteria + algae health, use 2 to 3 times a month, can prevent the growth of bacteria during high temperature.
(3) Internal administration of hepatobiliary Bikang + rehabilitation + jinduowei, 7 days of mixing feeding 3 to 4 times, and often with enzyme power + enzyme temptation treasure feeding, not only improve the disease resistance of breeding objects, but also have a good improvement effect on water quality.
<b>Success Stories</b>
<b>Guangdong Zhuhai Liangge</b>
The whole process follows the "maintenance and management" system concept
Fry begin to use enzyme power throughout the process
More than 80% uniformity (quite a strong drop)
Adults average about half a pound
(Under "Fish Mouth", farmed for 7 months)
Now the fish are emerging
Guess how heavy this fish is?
Bigger than the palm of my hand!
That's eight or two!
Harvest! (<b>This article is transferred from [</b><b>Hainan Excellence Biological Co., Ltd. Yellowfin Seabream Breeding Disease Prevention and Control</b><b>]. If you have copyright questions, please contact</b> [email protected]<b>. </b>）