What pole is suitable for fishing grass carp, crucian carp and carp in rivers and reservoirs?
How to get rid of fish with warped shells in reservoirs? Where are you? If it's near, I can go to Asia. Luya is a good way to attack truancy. It is difficult not only to kill fish with warped shells, but also to eat other fish.
There is really nothing more targeted.
How deep are the fish in the reservoir? 0.5- 10 meter deep.
1, Erythroculter ilishaeformis, whose scientific name is Erythroculter ilishaeformis, has a large body, a slender body, a flat side and a willow leaf shape. Keep the back of your head straight and raise it. The mouth is in the upper position, the jaw is thick and sharply upturned, standing in front of the mouth, making the mouth crack vertical. Eyes are big and round. Small in scale. Erythroculter ilishaeformis is a large freshwater economic fish in the upper and middle layers. It is agile, good at jumping, grumpy and easily frightened. It grows rapidly and is a fierce carnivorous fish, which lives on live fish. Plankton and aquatic insects are the staple foods at seedling stage. It mainly swallows more than 50g of fish and shrimp, and also swallows a small amount of seedlings, which has high economic value. Rapid growth, coarse growth, large size, the largest individual reached more than 15kg, common wild individuals reached 1- 10kg, artificial cultured fry reached 0.6- 1kg in the first year, and reached 2-3 kg in the second year.
2. The fish is big, generally 2 ~ 2.5 Jin, and the maximum fish weight is 10 ~ 15 Jin. The body is slender, the side is flat and willow-shaped. Keep the back of your head straight and raise it. The mouth is in the upper position, the jaw is thick and sharply upturned, standing in front of the mouth, making the mouth crack vertical. Eyes are big and round. Small in scale. The lateral line is obvious, the front part is slightly bent upwards, and the back part is slightly lower than the middle part of the body. 80 ~ 93 lateral scales. The ventral fin has ventral ribs from the base to * * *. The dorsal fin has strong and smooth spines, and the second spines are the worst. The end of pectoral fin almost reaches the base of ventral fin. The gluteal fin is long, with no branching fin 3 and branching fin 2 1 ~ 25. The caudal fin is deeply forked. The back of the body is light brown, the side is silvery gray, the ventral surface is silvery white, the dorsal fin and caudal fin are grayish black, and the pectoral fin, ventral fin and gluteal fin are grayish white.
3. All water systems in China Plain produce horseshoe crab, and Hubei, Anhui and Heilongjiang provinces have the highest output. June-July and June10-165438+10 are the peak fishing seasons. Fishing in Northeast China is mainly in winter, and Songhua River is the most famous.
Can the summer flowers of Xiangyun crucian carp be mixed with those of grass carp? Yes
How to raise the small fish hanging in the reservoir depends on the kind of fish. The water quality is better, the oxygen content is abundant, it is best to have a place where fish can shade, and there are aquatic plants ... If you keep a fish tank at home, it won't last long. ...
Can grass carp be mixed with crucian carp?
Grass carp lives in 1/4 layer water, and crucian carp belongs to 3/4 layer water. Grass carp mainly eats plants, and grass carp feces are only based on nutrients, which can save some feed consumption.
The fry ratio of grass carp and crucian carp can be controlled between 1: 1.2 ~ 1.5. In addition, you can put a proper amount of bighead carp and other fish in the bottom.
If bighead carp is added, it is suggested to pull chicken manure from the chicken farm regularly as a supplementary food for bighead carp. Please refer to related books for specific dosage.
It must be noted that the amount of chicken manure should not be excessive, and the overall water quality should be kept at 500~ 1000NTU.
What are the skills to catch grass carp in the reservoir with autumn temperature 18 degrees? In autumn, because the temperature continues to drop, the sunshine in the deep water can't penetrate, and the fish swim to the shallower water with higher temperature and sunny shore (there are many plankton here, which is also the reason for attracting fish). This is the season of autumn fishing. Fishermen had better use hand poles and short poles, so they don't have to worry that there are no fish in the shallow waters near the shore. But because the water is shallow and the fishing point is close, we should pay attention to concealment and keep quiet so as not to scare the fish.
Fishing skills in autumn:
In autumn, the temperature changes from hot to cold. From the beginning to the end, the temperature changes greatly. After beginning of autumn, the temperature is still high. After summer, the autumn is crisp and the temperature is pleasant; After the first frost. The temperature drops sharply in late autumn, and fishing enthusiasts can arrange fishing according to these changes. ? According to the temperature change, autumn can be divided into four fishing stages.
The first stage: independent autumn begins. Because it is not "three volts", the high temperature in summer is still very funny. You can use summer fishing methods, such as shady fishing and deep fishing, to avoid fishing at noon in the morning and evening, or even go fishing at night.
The second stage: generally starting from long summer. This is another golden fishing season of the year. "When the autumn wind is beautiful, the Wujiang River is fertile." This is Hans Zhang's autumn fishing realism. Fishing friends regard this period as the golden fishing season, not only because of the beautiful scenery and fat fish, but also because of the cool golden wind and suitable temperature. It is the peak season for fish to eat, and of course it is also the time for fishing friends to show their talents.
At this time, you can continue to use all kinds of bait for fishing in summer, and you can also use grasshoppers, gourds and various caterpillars and insects with autumn fishing characteristics. Using them to catch grass carp, catfish, snakehead and Pelteobagrus fulvidraco will get satisfactory results, and sometimes carp will be interested in these live baits. In fishing, we should still pay attention to the fishing edge. If you fish silver carp and grass carp in deep water, you should float from the bottom of the water. When fishing carp, crucian carp and catfish, you should catch the bottom while fishing. Because the seeds and insects on the shore are all fish's food when they fall into the water, it will attract fish to swim to the shore, so the fisherman catches the fish and hooks it.
The third stage: from around the cold dew. This is the season of autumn fishing. Fishermen had better use hand poles and short poles, so they don't have to worry that there are no fish in the shallow waters near the shore. But because the water is shallow and the fishing point is close, we should pay attention to concealment and keep quiet so as not to scare the fish. ? In the later stage of this stage, the following autumn rain, as the temperature drops again, the water temperature will drop sharply, the surface water temperature will be lower than the deep water temperature, and autumn fishing will enter the later stage.
The fourth stage: starting from the first frost. The first frost is the last solar term in autumn. At this time, it was close to beginning of winter, and the temperature dropped sharply. The water temperature was so low that the fish swam to the deep water. At this time, you can still fish, but the fishing point should be in the deep water area of the sun and leeward. Fishing should be avoided in the daytime at noon in the morning and evening, and the best time is 10 from early morning to 3 pm. Silver carp and bighead carp don't bite, grass carp don't eat, only crucian carp bite, and occasionally carp can be caught, so carp fishing should be the main thing during this period. Fish is very light, so use a small floating hook with thin thread. At this time, the predation of small miscellaneous fish is reduced, and earthworms and red worms can be used as bait to improve the bait rate.
Can duck-billed fish be mixed with crabs? In recent years, with the increase of aquaculture scale, the deterioration of aquaculture environment and the increase of aquaculture cost year by year, there is a great pressure to simply breed one species, especially conventional freshwater fish such as grass carp, silver carp and tilapia. Many fish farmers have to try polyculture. The main advantage of polyculture is that it can reduce the cost and risk of aquaculture. Last year, the scale of hairy crab breeding increased a lot, which led to a long-term downturn in the price of hairy crabs in the second half of the year, and many farmers were unprofitable or even lost money. However, for those farmers who raise mandarin fish or freshwater shrimp, the situation may be slightly better, so this year's hairy crab farming mainly presents two characteristics: first, of course, the scale of hairy crab farming has declined, and the enthusiasm of hairy crab farmers has decreased, including some farmers who directly quit the hairy crab farming to raise other varieties, and second, raising mandarin fish or raising other varieties in crab ponds. After the spring of this year, the weather as a whole felt bad. After a long period of low temperature, it turned sunny briefly, and then there were frequent cold air disturbances. This kind of weather is very unfavorable to aquaculture. Under many unfavorable conditions, we believe that polyculture will be accepted by more and more farmers. Today, we mainly introduce a species called paddlefish.
ACIPENSER sinensis, also known as Duckbill Acipenser or Duckbill Fish, belongs to the genus Spodoptera of Acipenseridae, which is native to the Mississippi River valley in the United States and is a large freshwater economic fish unique to the United States. The paddlefish is a large filter-feeding freshwater fish. Its shape is very strange. The surface of the paddlefish is smooth and scaleless. There is a long, flat kiss on the front of the head and the top of the mouth, which looks like a duckbill and spoon. The length of the kiss is 65438+ 0/3 of the body length. The caudal fin is curved and bifurcated, the upper leaf is long and the lower leaf is short. Smooth body surface. The body color is grayish brown on the back, often with some spots, and the abdomen is grayish white. This kind of sturgeon is not only edible but also ornamental because of its unique shape, and it has also become an important breeding object. The white sturgeon is docile and grows rapidly. The suitable pH value is 6.5 ~ 8.0, and the dissolved oxygen in the aquaculture water should be kept above 3 mg/L. Because the paddlefish is a wide-temperature fish, it has the characteristics of strong adaptability, rapid growth, feeding on zooplankton and short food chain. Due to the advantages of wide food sources, long life cycle, large size and easy fishing, paddlefish is suitable for breeding in large water bodies. In rivers, paddlefish like to live in areas with slow water flow and abundant food. In lakes and reservoirs, ACIPENSER sinensis likes to inhabit the middle and upper layers of water, and is very sensitive to the changes of water level and velocity, as well as the turbidity of water quality and the concentration of food organisms. The most important thing in culture is to create an ecological environment suitable for paddlefish. The feeding habits of ACIPENSER sinensis mainly filter zooplankton and occasionally eat chironomid larvae and other foods. The feeding mode is the same as that of silver carp, and plankton such as cladocera and Daphnia are the favorite foods of ACIPENSER sinensis. Young fish feed on zooplankton and mainly choose cladocera, but before the development of gill rakes, their feeding mode is mainly swallowing. It was not until the total length was 12 ~ 13 cm that the gill rakes of young fish played a role in filtering food. The white sturgeon, which is 1.2 cm in length, devours zooplankton one by one, as well as small fish and shrimp. When the total length is more than 12 cm, the gill rakes of feeding organs have developed well and turned to filter feeding. Domesticated ACIPENSER sinensis can also eat floating puffed pellet feed, and the specific particle size of pellet feed depends on the growth period. The feeding frequency is relatively high, generally 4-6 times, and the daily feeding amount is about 4% of the weight of the sturgeon, and the feeding time is at least 30 minutes each time, and it is fed twice at night to ensure the nutritional supply. It is required that the crude protein content of puffed pellet feed should reach 35% ~ 40%, the added amount of vitamins should reach 1%, the added amount of minerals should reach 1%, and the total phosphorus intake should reach about 14%. To sum up, as a polyculture species, ACIPENSER sinensis has obvious advantages.
But in Guangdong, many people have a good effect of raising paddlefish alone. At present, there is no relevant data in this regard. We specially found a test data of cage culture of ACIPENSER sinensis for your reference. As early as 2005-2006, the Fisheries Bureau of Zoucheng City, Shandong Province conducted a cage culture experiment of ACIPENSER sinensis in Wadou Reservoir in front of the city. After two years of breeding experiments, good production effects and economic benefits were achieved: the average yield reached per square meter 10. 15 kg, equivalent to 6800 kg per mu, the specifications reached 450-750 g/tail, the net profit per square meter reached 452.7 yuan, and the input-output ratio was 1: 2.22. Details are as follows:
1, site selection and cage setting
1. 1, breeding point selection
The breeding site is selected in Wadou Reservoir in front of the city. The aquaculture area has a large water area, the water depth is more than 6 m, the dissolved oxygen is 6 ~ 9 mg/L, the pH value is 7~8.4, the total hardness is 20~40 mg/L, the ammonia nitrogen is 0.02~0.06mg/L, and the nitrite is 0.0015 ~ 0.01mg/L. The water quality is good.
1.2, cage structure and setting
The cage is set according to the silver carp cage, and the water area rich in plankton is selected, which requires stable water flow, shelter from the wind and the sun, and quiet environment. The cage frame adopts simple bamboo frame. The box body is made of polyethylene knotless net. The size of the cage is 5 meters ×5 meters ×2.5 meters, and the mesh size is 2.5 cm ... The sturgeon is afraid of light, and the surface of the cage is covered with a black film.
2. Main technical measures
2. 1, seed selection and stocking
Select high-quality seedlings with strong physique, lively swimming, neat specifications and no disease or injury. The stocking density is 20~40 animals per square meter. The specification is 10~ 15cm. According to the characteristics that the larvae of Amur sturgeon are sensitive to the change of water temperature, the temperature difference when the larvae enter the box should not be too large, and it should be less than 2℃, and the adjustment should be as consistent as possible. Disinfect the fish with 1.5%~2.0% salt solution for 8~ 10 minutes before entering the box.
2.2, scientific feeding
At the initial stage of stocking, zooplankton (such as red worms) were mainly eaten, and then gradually domesticated, changed to floating granular bait, supplemented by night light bait. The bait should be fresh, non-perishable, nutritious and delicious in particle size. Feeding follows the principle of "four fixed". When the water temperature is 20~30℃, the daily feeding rate is1.5% ~ 3%; When the water temperature is lower than 20℃, the daily feeding rate is 0.5 %~ 1.0%. According to food intake, weather, water quality and so on. The feeding time is three times a day, 07:00-08:00,1:00-12: 00, 18:00- 19:00 respectively.
2.3, timely packaging
The growth rate of ACIPENSER sinensis is very fast, so it is necessary to breed in different specifications in time to avoid polarization and improve the survival rate.
2.4, frequent patrol booth
2.4. 1. Strictly implement the morning, noon and evening box patrol system, carefully observe the feeding and activities of sturgeon, and remove the residual bait in time. Clean the cage regularly to prevent the mesh from blocking and affecting the water exchange inside and outside the cage.
2.4.2. Ensure the safety of the cage in rainy and stormy seasons, and pay attention to reinforcing the cage at any time. Always check whether the cage is damaged, and repair it in time if found damaged. Black shading nylon cloth and anti-theft net should also be installed at the upper mouth of the cage.
2.4.3. Make daily records, and record the daily temperature, water temperature, feeding amount, morbidity and deaths. Find abnormal situations and take timely measures.
2.5, fish disease prevention and control
Adhere to the principle of "prevention first, health management". The fry are soaked in 1%~2% salt or 0.4 mg/l dibromohydantoin, and then put into the box, and sprayed with 1.5 mg/l quicklime and 0.3 mg/l dibromohydantoin every 20 days or so. Prohibit the use of illegal drugs in the waters around the cage.
What kind of fish is suitable for grass carp with herring, silver carp and bighead carp?
Carp was the most widely cultivated freshwater fish before the Tang Dynasty. However, because the surname of the Tang royal family is Li, the cultivation, fishing and sales of carp are prohibited. Fishermen have to engage in the production of other species, resulting in four major fish: herring, grass carp, silver carp and bighead carp.
Silver carp is also called silver carp. Move in the upper waters and eat phytoplankton such as green algae; Bighead carp, commonly known as "chubby fish", is also called silver carp. Habitat in the upper and middle waters, feeding on zooplankton such as protozoa and Daphnia; Grass carp lives in the middle and lower reaches and feeds on aquatic plants. Black herring inhabits the bottom of the water and feeds on mollusks such as snails, clams and mussels. Mixed feeding of these four kinds of fish can improve the utilization rate of bait and increase the output of fish.
The four major fishes belong to CYPRINIDAE and CYPRINIDAE respectively. Because these four kinds of fish have the same characteristics of rapid growth and strong disease resistance, they are suitable for people to eat fish. Moreover, the growth inflection point age of the four big fish is 2-3 years older than their sexual maturity age, and they will continue to grow after sexual maturity.