Mussels are widely distributed in rivers, lakes, reservoirs, ponds, rice fields and other water bodies, and usually live in bottom sediment. In the natural state, only the rear end of the mussel body is exposed from the sediment, and the inlet and outlet pipes are often opened to maintain the water flow in the body and keep the normal life activities. Mussels usually live in shallow waters in patches or bands, and like flowing and clean fat water. Mussels are generally suitable for living in neutral or weak acid and alkaline water, but different kinds of water have different requirements. Both Anodonta dorsalis and Cremastra plicata can live at pH 5~9. Hyriopsis cumingii often needs to live in water with pH7~8. Mussels have low requirements for dissolved oxygen, and the lower limit is about 3 mg/L, but if it is lower than this limit for a long time, mussels will die in large numbers. Mussels have strong drought resistance. Generally, mussels buried in the soil will not die after half a month of drought, but they will die after being exposed to the air, especially under the scorching sun in summer.
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Breeding technique of river mussel
I. Requirements for environmental conditions of pearl breeding waters
Pearl mussels live in water, and the water environment not only determines whether the pearl mussels can survive and grow well, but also directly affects the yield and quality of cultured pearls. Therefore, the choice of water environment is very important.
1, the water surface should not be too small, and it should be more than 6000m2. If the area is too small, the water quality environment changes greatly and is unstable, which affects the growth of pearl mussels.
2. Beads can be cultivated on the water surface with water depth of 1 .5-4.0m, preferably 2-3m, and it is not suitable to be cultivated below1m or above 5m.
3, sufficient water, and no pollution, the content of toxic substances shall not exceed the fishery water quality standards.
4. Running water at a certain speed (each flow speed does not exceed 0. 1 m) is beneficial to the growth of pearl mussels and pearls. Production practice has proved that Hyriopsis cumingii can produce 5-8 grams of pearls a year in rivers and lakes with running water and good conditions, while it can only produce 5-8 grams of pearls after three years in still water.
5. Sufficient sunlight can directly produce thermal effects, thus providing energy for pearl mussels and their prey organisms. Light also has a direct influence on the color and luster of pearls. It can not only increase dissolved oxygen in water, but also promote water movement and heat transfer.
6. Clay is the best soil quality, followed by river soil, and loess and sandy soil are the worst. There should be proper silt at the bottom of the pool.
7. The PH value of 7-8 is the most suitable for the growth of pearl mussels and the secretion of nacre.
8. Generally, dissolved oxygen is greater than 5mg/L in summer and 3mg/L in winter.
9. The transparency of pearl mussel waters is 30 cm.
10, the optimum range of water temperature for pearl mussels is 18-28℃ (Hyriopsis cumingii).
1 1, the content of inorganic salts in water is the most important, because calcium is the main component of pearls and mussels. Usually, the calcium content in water is required to be above10mg/L. When the calcium content in water is low, it can be solved by applying quicklime.
12, nitrogen is an essential nutrient for the growth of all algae. The high content of ammonia nitrogen indicates that the water body is relatively fat, exceeding 2 mg/L, indicating that the water body is seriously polluted and has an impact on the growth and survival of mussels; When the ammonia nitrogen content is lower than 0. 1 mg/L, the water quality is too thin to meet the needs of natural bait proliferation.
13, nitrite content should be between 0.0 1-0. 1 mg/l. When the content exceeds 0. 1 mg/L, the mussel beads will grow slowly or die.
14. There should be no aquatic vascular plants in the aquaculture waters to prevent them from competing for nutrition with the food organisms for pearl mussels. Some enemy organisms, such as shrimp and crabs, should also be removed in time.
Second, the choice of pearl breeding waters
Whether it is ponds, ditches, harbors, lakes, reservoirs or rivers, as long as the environmental conditions of pearl-breeding waters meet the above requirements, mussels and pearls can be cultivated in pearl-breeding waters.
Third, the cultivation of pearl mussels
1. At present, the breeding methods of pearl mussels mostly adopt hanging culture and cage culture. There are two hanging methods: single hanging and serial hanging on one line to raise more than two mussels. The number of cages depends on the size of the cage (net cage, net clip), and it is generally appropriate that each clam can contact the bottom of the cage.
2. The average mu of aquaculture pond for pearl mussels is 800- 1200; There are 600-800 external swings. Breeding density depends on body weight and fatness. Physical, chemical and biological factors such as water flow and water depth increase or decrease with the size of mussels.
3. The breeding of pearl mussels has become the main production content of the comprehensive development and utilization of the fishing industry in our city ...... > >
Question 2: What does the mussel feed at home? The mussel mainly eats algae and organic particles, and the particles are very small, so the water green is rich in algae and suitable for mussel growth.
Question 3: He has a mussel at home, and he doesn't know what to eat and eat plankton. He can buy Daphnia and shrimp mussels to grow by filtering all kinds of organisms in the water. Therefore, it is particularly important to control the water quality. Generally, it is required to flush once every half month, and the water exchange capacity is required to reach about 50 cm. In summer and the season of fish and mussels, it is required to change the water every 10 day to make the water quality "fat and tender"
Question 4: What do mussels eat? How to raise it? Picked up a mussel. My mussel is bigger than half of the keyboard. Last year, it laid eggs. Half of the mussels were fatter. The mother's edge was flat. I don't know if you are a HYRIOPSIS cumingii or an ordinary mussel. But I have raised them all. Don't raise them with sand. If you want to raise pearls, you will die in a few days. I can also tell you how to get serious.
Question 5: How to raise mussels at home? What does it eat? Is there a place that doesn't sell food? The mussels mainly eat algae and organic particles, and the particles are very small, so the water green is rich in algae and suitable for the growth of mussels.
Question 6: How to raise mussels, what they eat, whether to put soil in the water or not, and eat organic matter in the water by filtering water. You can feed fish tank water, and it is best not to filter it. You can also bask in green water from B.
Question 7: Let's talk about what mussels eat first. Put mud in the bucket so that mussels can survive better. Put some water plants and it will be OK.
Mussels are widely distributed in rivers, lakes, reservoirs, ponds, rice fields and other water bodies, and usually live in bottom sediment. In the natural state, only the rear end of the mussel body is exposed from the sediment, and the inlet and outlet pipes are often opened to maintain the water flow in the body and keep the normal life activities. Mussels usually live in shallow waters in patches or bands, and like flowing and clean fat water. Mussels are generally suitable for living in neutral or weak acid and alkaline water, but different kinds of water have different requirements. Both Anodonta dorsalis and Cremastra plicata can live at pH 5~9. Hyriopsis cumingii often needs to live in water with pH7~8. Mussels have low requirements for dissolved oxygen, and the lower limit is about 3 mg/L, but if it is lower than this limit for a long time, mussels will die in large numbers. Mussels have strong drought resistance. Generally, mussels buried in the soil will not die after half a month of drought, but they will die after being exposed to the air, especially under the scorching sun in summer.
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Breeding technique of river mussel
I. Requirements for environmental conditions of pearl breeding waters
Pearl mussels live in water, and the water environment not only determines whether the pearl mussels can survive and grow well, but also directly affects the yield and quality of cultured pearls. Therefore, the choice of water environment is very important.
1, the water surface should not be too small, and it should be more than 6000m2. If the area is too small, the water quality environment changes greatly and is unstable, which affects the growth of pearl mussels.
2. Beads can be cultivated on the water surface with water depth of 1 .5-4.0m, preferably 2-3m, and it is not suitable to be cultivated below1m or above 5m.
3, sufficient water, and no pollution, the content of toxic substances shall not exceed the fishery water quality standards.
4. Running water at a certain speed (each flow speed does not exceed 0. 1 m) is beneficial to the growth of pearl mussels and pearls. Production practice has proved that Hyriopsis cumingii can produce 5-8 grams of pearls a year in rivers and lakes with running water and good conditions, while it can only produce 5-8 grams of pearls after three years in still water.
5. Sufficient sunlight can directly produce thermal effects, thus providing energy for pearl mussels and their prey organisms. Light also has a direct influence on the color and luster of pearls. It can not only increase dissolved oxygen in water, but also promote water movement and heat transfer.
6. Clay is the best soil quality, followed by river soil, and loess and sandy soil are the worst. There should be proper silt at the bottom of the pool.
7. The PH value of 7-8 is the most suitable for the growth of pearl mussels and the secretion of nacre.
8. Generally, dissolved oxygen is greater than 5mg/L in summer and 3mg/L in winter.
9. The transparency of pearl mussel waters is 30 cm.
10, the optimum range of water temperature for pearl mussels is 18-28℃ (Hyriopsis cumingii).
1 1, the content of inorganic salts in water is the most important, because calcium is the main component of pearls and mussels. Usually, the calcium content in water is required to be above10mg/L. When the calcium content in water is low, it can be solved by applying quicklime.
12, nitrogen is an essential nutrient for the growth of all algae. The high content of ammonia nitrogen indicates that the water body is relatively fat, exceeding 2 mg/L, indicating that the water body is seriously polluted and has an impact on the growth and survival of mussels; When the ammonia nitrogen content is lower than 0. 1 mg/L, the water quality is too thin to meet the needs of natural bait proliferation.
13, nitrite content should be between 0.0 1-0. 1 mg/l. When the content exceeds 0. 1 mg/L, the mussel beads will grow slowly or die.
14. There should be no aquatic vascular plants in the aquaculture waters to prevent them from competing for nutrition with the food organisms for pearl mussels. Some enemy organisms, such as shrimp and crabs, should also be removed in time.
Second, the choice of pearl breeding waters
Whether it is ponds, ditches, harbors, lakes, reservoirs or rivers, as long as the environmental conditions of pearl-breeding waters meet the above requirements, mussels and pearls can be cultivated in pearl-breeding waters.
Third, the cultivation of pearl mussels
1. At present, the breeding methods of pearl mussels mostly adopt hanging culture and cage culture. There are two hanging methods: single hanging and serial hanging on one line to raise more than two mussels. The number of cages depends on the size of the cage (net cage, net clip), and it is generally appropriate that each clam can contact the bottom of the cage.
2. The average mu of aquaculture pond for pearl mussels is 800- 1200; There are 600-800 external swings. Breeding density depends on body weight and fatness. Physical, chemical and biological factors such as water flow and water depth increase or decrease with the size of mussels.
3. Pearl mussel breeding has become a comprehensive development and utilization of the fishing industry in our city ....... >; >
Question 8: How to raise mussels, what do they eat, and do you want to put soil in the water? It doesn't matter whether you put soil or not, you can eat organic matter in water and filter it. You can feed fish tank water, and it is best not to filter it. You can also bask in green water from B.