a large number of dead fish Learn more about a large number of dead fish
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There are a large number of dead fish in Sanya Bay. Fishermen use illegal trawls to fish, resulting in the release of fishing nets.
There are a large number of dead fish in Sanya Bay. Fishermen use illegal trawls to fish, resulting in the release of fishing nets.
2019-02-20 -
A large number of dead fish related departments have been involved in the investigation of nearly 600 meters of beach in Sanya Bay.
A large number of dead fish related departments have been involved in the investigation of nearly 600 meters of beach in Sanya Bay.
2019-02-20 -
Disorderly release leads to the death of a large number of sea and lake fish
Recently, a large number of dead fish appeared in Napahai Lake District, Shangri-La City, Diqing Prefecture, Yunnan Province. The reporter learned from the propaganda Department of the Shangri-La Municipal Party Committee on the 28th that the dead fish were released in disorder and the area of the lake decreased seasonally; in mid-February.
2018-06-01 -
The surface of Hongze Lake blackened and thousands of mu of fish and crabs died. A large number of dead fish flooded the bank.
In Shengli Village, Linhuai Town, Sihong County, Suqian City, a number of villagers reflected to the column that they were hairy crab farmers on the edge of Hongze Lake and were usually engaged in aquaculture in accordance with the lake. But recently, crabs, fish and shrimp in 13000 mu of crab ponds in the village almost died overnight.
2020-11-11 Hongze Lake water surface blackening ten thousand mu fish and crabs dead a large number of dead fish -
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 -
Can you still eat black fish when they are dead?
It's best not to eat blackfish when they're dead, unless they just died. Because black fish is carnivorous fish, once dead, a large number of bacteria will grow in the body, if eaten will lead to physical discomfort, so it is best not to eat. Generally, you can break open the fish gills to see if the cheek changes.
2020-11-11 Black fish dead also can you eat black the best okay? -
Sihong County Hongze Lake ten thousand mu fish crab dead black sewage continuously poured in
Affected by recent heavy rainfall, a large amount of upstream sewage flows into Hongze Lake. Since the early morning of the 25th, the water quality has deteriorated seriously. As of 5 pm on the 28th, about 31,000 mu of breeding area in Linhuai Town, Sihong County has been seriously affected, including 160 crab households in Shengli Village, Linhuai Town, located on an island in the lake.
2018-08-30 Sihong County Hongze Lake ten thousand mu fish and crab dead black sewage by -
How to catch and clean fish and insects?
How to catch and clean fish and insects?
2018-07-23 -
Prevention and treatment of complications of fish fingerling
Rare complications of rotten gills, enteritis and bleeding occurred in Sanhe Town, Hongze County, Huaian City, Jiangsu Province, resulting in large-scale death of fish species. Now the specific situation of the disease and prevention and control measures are summarized as follows for everyone to discuss. Onset time and symptoms: sporadic dead fish appeared in early August, diseased fish had rotifer on the Gill, and others did not have any symptoms. Around the middle of August, there were a large number of deaths, and all of them were grass carp fingerness. the diseased fish were black and lying on the edge of the pond, unable to float, stopped feeding and picked up.
2019-01-16 -
Pathogenic effect of feed pollution on fish
At present, due to the phenomenon that the content of bacteria in some feed products seriously exceeds the standard, the phenomenon of fish death occurs from time to time after fish ingest contaminated feed. According to the symptoms of fish disease can be divided into two types: acute type (fulminant) and chronic type. 1. Acute type (fulminant type): after eating contaminated feed, most fish get sick for 3 ~ 5 days, and as little as 1 ~ 2 days, the disease occurs, and the seriously ill fish have died, and the amount of dead fish is gradually increasing, but it does not affect food intake. Most fish can eat normally. This kind of position
2019-01-16 -
Hatching management of artificial reproduction of black fish
Black fish is a kind of fish commonly eaten in our country, it is a common delicacy on the dinner table, and its nutritional value is extremely rich, the protein content of black fish is very high, eating more black fish has a certain effect on anti-inflammation of human wounds, so it is very important in life.
2020-11-08 Black fish artificial breeding hatching management black in me -
The result of the investigation into the bizarre disappearance of 800 ornamental fish in the aquarium is a big surprise.
Employees of Shenzhen Ocean World found that most of the 500 ornamental fish placed in the shark pond a week ago had disappeared. This unprecedented phenomenon attracted the attention of the park: where have all the fish gone? And then clear.
2018-08-23 -
What is the algae in the pond? How to prevent the occurrence of this phenomenon?
Friends of aquaculture all know that once algae fall out in aquaculture ponds, the fish and shrimp in the water will be dangerous. if they are not dealt with in time, it will easily lead to rapid deterioration of water quality, death of a large number of fish and shrimp, and great economic losses to farmers! Inverted algae in pond
2020-11-11 Pond anti-algae what is how prevention phenomenon occurrence -
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 -
How harmful is the outbreak season of cyanobacteria to aquaculture?
Cyanobacteria, also known as slime algae, is the simplest and most primitive single-celled organism. Cyanobacteria are widely distributed in natural water bodies and have caused serious harm to aquaculture. ...
2019-02-27 -
Common diseases and control of rainbow trout
Common diseases and control of rainbow trout
2018-09-07 -
How to judge the weight of floating head of fish
The weight of the floating head of a fish is mainly judged by the time when the fish began to float, the location of the floating head, the size of the surface of the floating head and the species of the floating head fish. 1. Dark floating head. Usually occurs when it is already dawn but the sun has not yet come out, when the fish move in the middle of the pond and on the surface of the wind, you can see bursts of spray. At this time, the dissolved oxygen in the pond water body is 2-3 mg / L, which is a normal floating head. two。 Light floating head. It often happens at dawn, when the fish are in the middle of the pond and on the surface of the wind, and the wild fish are at the edge of the pond.
2019-01-16 -
Prevention and control of bubble disease of cultured overwintering carp
The peak period of fish disease is from June to September. Fulminant fish disease of crucian carp hemorrhagic type often occurs in adult fish ponds, which endangers silver carp, bighead carp and blunt snout bream, which brings heavy losses to farmers. In general, the effect of routine medication is not good, and researchers have repeatedly observed and treated it for many years.
2020-11-08 Aquaculture overwintering carp gas bubble disease control September for fish -
Fishing should be fastidious in autumn
First, pay attention to the weather: autumn dragnet fishing must choose sunny days, cool weather, pond fish do not float around the dawn, because at this time the least impact on the fish in the pond, but also in time to supply the fresh fish caught in the morning market. Haze, muggy weather is not suitable for net fishing, so as not to cause a large number of dead fish. In addition, it is not appropriate to catch fish in ponds when they have floating heads or fish diseases. Second, feed restriction before fishing: the oxygen consumption of fish increases after they are full, and they will be frightened, jump and run away when they are caught in the net, which is easy to cause death.
2019-01-16 -
Analysis on the prevention and treatment of fish disease of rainbow trout raised in brackish water
Rainbow trout is a kind of cold water and widely salty fish. it is famous for its delicious meat and rich nutrition. it has high economic value and is one of the excellent farmed species in the world. Jingtai County is one of the driest areas in central Gansu Province. Freshwater resources are scarce, but there is a certain flow.
2020-11-08 Analysis brackish water breeding rainbow trout fish disease prevention and control