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There are two suitable temperature growth periods for scallops in one year. The larvae of scallop scallops are raised to three times of proper temperature growth period. Therefore, the production time must be divided before the end of August of the same year, so that the shellfish shell height can be reached by the end of the year. Achieve 2 cm to 3 cm. In April of the following year, the small and medium-sized seedlings should be separated when the cages are cultivated, and the large seedlings can be harvested from October to November at the end of the year; the young seedlings will not be harvested until the third year of spring from April to May.
In addition, the inversion time also has a great influence on the growth of scallops. When the water temperature rises to about 5Â°C in the spring of the following year, it should be emptied in time. If the cage work can be completed before and after mid-April, the scallops will be able to make full use of the specifications for two scallops of appropriate temperature and grow into shells with a height of 6 cm to 7 cm.
2. Adjust the cultured water layer in time
In winter (water temperature is below 5Â°C) and summer (water temperature is higher than 25Â°C), scallops are submerged into middle and lower seawater for aquaculture to make them safe for winter and summer; in spring and autumn (water temperature 10Â°Cï½ž23Â°C), scallops are raised to 2 meters to 3 meters of water layer for breeding, these two seasons due to the upper water temperature appropriate, rich food, is conducive to the growth of scallops.
3. Timely removal of attached organisms
In the scallop culture, a large number of attached organisms are attached, resulting in poor water flow and reduced bait, which seriously affects the growth and survival of scallops. The methods for clearing attached organisms are: 1 During the summer of July and August, when the peak of attached organism breeds, they should sink and avoid the attached water layer; 2 Brush the cage in a timely manner, invert the cage, and wash the cage every 1 month to 2 months. Each year in April and August, each cage is emptied and the cage can completely remove attached organisms.
4 adjust the buoyancy
With the continuous growth of scallops and the attachment of attached organisms, the truss load gradually increases. In order to maintain a reasonable water layer and prevent sedimentation, buoyancy should be adjusted in time, the number of floats can be increased, or double row floatation can be used. Daily management should also frequently check for floating floats, loose slings, crushing openings for cages, and intertwining cages. Find problems and resolve them in a timely manner.
5. Execution of beryllium algae and algae colonization
In scallop farming, in order to increase the utilization rate of the sea area and increase the economic benefits, the seaweed algae and the algae algae are also widely used. The metabolites of scallops provide organic fertilizer for kelp and increase the nitrogen content in the sea area; the carbon dioxide exhaled by scallops adds raw materials for photosynthesis to kelp. Oxygen discharged from kelp is conducive to the breathing of scallops; the seaweed algae floating in the water has a shade effect on scallops and is conducive to feeding and growth of scallops, so the two are mutually beneficial. The main methods of production are intercropping and raising between the ropes. The former raises 1 kelp of trusses every 1 to 2 trusses and the latter raises 1 scallop every 4 to 5 ropes. Bay scallops can be reared with kelp. After kelp harvested in June, bay scallops can be reared on seashells, and in July, seabuckthorn can be divided into cages. In October, seaweed is raised under the sea (occupies only 10% of the breeding sea area). Scallops can be harvested, and the harvested seaweed can be divided into seedlings, which can double the utilization of the sea area.
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