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The growth pattern of clams
The temperature of the seawater, which is suitable for the growth of clams, is about 15-30°C. It starts to grow when the spring water temperature reaches 11°C or more, and it stops growing when the winter water temperature drops below 10°C. The fastest growing time for the clams in south Zhejiang is April-June and 9 November-December, February to February the following year, the growth rate is extremely slow. The growth speed of the clams varies significantly with the size of the individual. Individuals with smaller clams have much longer shell lengths and body weights than individuals with large clams. The ideal water level of the shrimp pond culture is 30-50 cm above the surface of the control beach. In addition, whether the food in the pond is rich or not, the quality of the sediment is an important factor affecting the growth rate of the clam. During the cultivation period, except for the high density or other reasons, the gentry must move as little as possible. Once moved, the growth of the clams will be greatly affected.