The change of gonad tree planting is also an important basis for determining the breeding season. When the gonad index reaches 15% on average, it will enter the breeding season. In the breeding season, it has the habit of discharging many times. After the first discharge, it can be discharged after a week or so, and the shell is repeated many times.

Chlamys farreri is hermaphroditic, which is hermaphroditic. In the breeding season, the female gonads are orange and the male gonads are milky white, which is obviously distinguished. After the breeding season, the gonads degenerate, and the females and males are identical in appearance, showing colorless and translucent shape. Chlamys farreri has two breeding periods every year. The first time is from May to July, with the water temperature of 14-2℃, and the second time is from September to October, with the water temperature of 22-2℃.

The breeding season is mainly related to the water temperature, which is quite different in different sea areas. The southern coast of Shandong Province entered the peak of breeding in the first half of May. However, in the northern island waters of Long Island, it only entered the peak breeding season from June to July.

Extended information:

There are many kinds of scallops; There are about 45 species of scallops distributed along the coast of China. Scallop has long been one of the important species in marine culture in China. At present, China's scallop production mainly comes from farming, and the fishing output is very small.

the nursery pond requires convenient pumping, fresh water quality, no pollution source in the upstream, convenient transportation and complete power system. The nursery pond is preferably rectangular or square, with the east-west direction, the sandy bottom is the best, and the sediment bottom is also acceptable, and the area is 1-3 mu. The water depth of the seedling pond should be about 1-15m, and there should be good water inlet and drainage facilities, and the water inlet and drainage systems should be strictly separated.

the drainage outlet should be located at the bottom of the seedling protection pond, so that the wastewater at the lower level of the seedling protection pond can be directly discharged every time it is drained. The water inlet is located at the other end of the pond 1 meter away from the bottom of the pond, so as to introduce clean and oxygen-rich seawater.