Chrysanthemum scallop Season-aquaculture Technology

Rizhao scallops along the coast of Rizhao City, Shandong Province, were changed to the traditional “Spring Harvest Spring Harvest” breeding mode, which means that large-scale seedlings will be cultured in cages for breeding from late September to late October. Harvested from April to July of the following year, the entire breeding period does not pass through the hot season. Through several years of breeding practice, it has been proven that seasonal breeding not only avoids a large number of deaths of scallops, but also grows well with significant economic benefits. The average shell height per mu is about 6.5 cm and the scallop is about 3500 kg. The per mu output value is 13,000 yuan and the mu profit is 3,500 yuan. The seasonal cultivating techniques of scallops for scallops are summarized below.
1. Some of the large-sized seedlings of the seedlings source and transport scallops are farmed in the deepwater layer of the local offshore area, but most of them are purchased from the Yantai coast. Bei Miao transport is carried by dry-car transportation. When it is transported, it must be fast-loaded and transported at night. It is usually at 6-8 hours. Immediately after arriving at the scene to raise the sea, the survival rate was over 95%.
2. Separating the seedlings at the right time is crucial for timely seedlings. Through breeding practices, seedlings are generally most suitable from late September to late October. At this time, the water temperature is 25-20°C, and the temperature is about 20°C, which is suitable for long-distance dry transport of scallops, and is conducive to the growth of scallops. After sub-seedling, it is in a suitable growth period for scallops.
3. Bei Miao specifications and seedling density to ensure that when the harvest meets the specifications of the commodity, shellfish should use large seedlings with a size of 3 cm or more. Sub-seedling density, generally 45-50 per layer cage seedlings, 8-layer cage per cage 360-400 seedlings, 400-acre, mu 150,000 seedlings. Hanging seedlings density, each row trusses hanging 65 cages, cage spacing 1.0 meters.
4. Marine management mainly focuses on two aspects: First, timely cleaning and brushing of attached organisms and floating sludge on cages, keeping the flow of mesh water to facilitate scallop filtration; Second, we must ensure that the farming trusses are sturdy and safe, and increase in time. Buoyancy, to avoid truss sinking. At the same time, it is necessary to check whether rakes, slings, cages, and floating culture equipment are damaged. If problems are found, measures must be taken to resolve them in time.
5. Harvest to take the best way to harvest. Shells with a shell height of 6.5 cm or more and fresh shells of 200-240 capsules/kg can be harvested at the end of April or early May. Individuals who are small should be harvested until July and then harvested before the high temperature period. complete.

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