Taking raft culture Oyster as an example, the culture site should be selected in the sea area with less wind and waves, stable water quality, no industrial pollution, silt or mud bottom, water depth above 8m, water temperature below 30℃ in summer, surface velocity around 0.3-0.5m/s, and specific gravity between 1.008- 1.02. The specific salinity and temperature range depend on the kind of oyster. For oyster near the river, the suitable temperature range is 10-33℃ and the suitable salinity range is 5-25‰. The suitable temperature range of oyster is 5-28℃, and the suitable salt range is 10-37‰, especially 20-30‰.

1. What are the conditions for oyster culture?

1. Take raft culture Oyster as an example, the culture site should be selected in the sea area with small wind and waves, stable water quality, no industrial pollution, muddy or muddy bottom, water depth of more than 8m, little change in water temperature, summer temperature of less than 30℃, surface velocity of 0.3-0.5m/s and specific gravity of 1.008-658.

2. The suitable temperature range for oyster growing along the river is 10-33℃, and the suitable salinity range is 5-25? .

3. The survival temperature range of oyster is -3℃ to 32℃, the suitable growth temperature range is 5℃ to 28℃, and the suitable salt range is 10-37? , especially 20-30? More appropriate.

4. The survival temperature range of Crassostrea chibi is the same as that of Crassostrea gigas, ranging from -3℃ to 32℃, but the suitable salt range is narrow, ranging from 27℃ to 34℃. .

5. Pleurotus ostreatus, which is suitable for growth at 6-25℃, has wide adaptability to salinity (close to oyster near the river) and is distributed in the inner bay and offshore.

6. The suitable water temperature range for oyster growth in Dalian Bay is 6-25℃, and the suitable salt range is narrow, which is 25-34? .

Second, the difference between oysters and oysters

1, oysters generally refer to oysters, and there is no difference between them.

2. Oysters live by attaching their shells to other objects, and feed on microalgae and organic debris in the ocean, which are mainly distributed in intertidal and subtidal zones with water depth less than 10m.

3. The oyster shell is secreted by the mantle, which is divided into three layers. The innermost layer is the nacre layer, which has a flaky structure and consists of calcium carbonate. The intermediate layer is prismatic layer, which has a columnar structure and is also composed of calcium carbonate. The outermost layer is the stratum corneum, which is thin and transparent.

4. The adventitia is two layers of epithelial cells with connective tissue between them, extending from the top of the shell to the edge of the abdomen. There are muscle fibers in the membrane to help it adhere to the inner surface of the shell. The edge of the mantle thickens to form three folds, among which there are radial muscles and annular muscles on the inner folds, which make the edge close to the shell; There are a large number of sensory cells or organs on the folds, which have tactile and visual functions; The outer fold has a strong secretory function.