Shallow sea scallop farming has the advantages of investment province, low risk, simple operation, no need of feeding, short breeding cycle, and good market prospects. It is very suitable for a large number of converting fishermen to carry out aquaculture with a broad prospect. This article summarizes the experience of breeding scallops and bay scallops in shallow seas of Dachen Island in previous years and provides a brief introduction to shallow-sea scallop farming techniques for reference only. I. Selection of aquaculture sea areas in the sea area should be based on better shelter conditions, no pollution, small waves, slow water flow, abundant feed, and a water depth of more than 6 meters at low tide, and the proportion of seawater stabilized at 1.015-1.029 sea area. Second, the breeding equipment according to the characteristics of large storms in the shallow sea, can adopt long-line cage cage mode. Three main ropes per acre are provided. Each main rope is 100 meters long and each has a diameter of 2 cm. The two ends of each main rope are fixed with bamboo piles. It is required that the pile should be put into the mud more than 2 meters and there are 6 piles per acre. , Shunliu is set in the sea area. A certain number of float balls (bubbles) are suspended on the main rope every certain distance so as to withstand the weight of the breeding equipment. The distance between the main cable and the main cable is 6 meters. Each main rope can be evenly hung with 133 scallop cages, and three main ropes can be hung with 400 cages, which is 1 mu. Scallop cages generally choose 8-layer cages, each layer spacing is 13-15 cm, the bottom plate is round plastic circular plate. The scallop cages are divided into two holding cages and cages. Holding cage cage mesh small, is surrounded by 15-18 mesh machine network; cultivate cage large mesh, mesh length of about 2.8 centimeters, with 18 strands of polyethylene braided mesh, cylindrical. Scallop cages are available in the North. Third, breeding methods 1. Seed transport: generally use film bag oxygenation methods. Specific approach: After counting, the seedling bags are washed with clean seawater and then placed in a film bag. Each bag is generally loaded with 50,000 seedlings, oxygenated zipbags, and placed in a foam box. A foam box put 2 bags, a box of 100,000 seedlings. Two small pieces of ice are placed outside the film bag and finally packaged for transport. After being transported to the aquaculture sea area, it is necessary to concentrate manpower to hung the seedling bags directly to the main cable in the sea area. The entire transit time is controlled safely within 10 hours. 2. Aquaculture management: Maritime management is the key to scallop farming. When the seedlings are kept in the sea for 2-3 days, if the scallop seedling height is within 1.5 cm, they should be placed in a 30-mesh bag for raising. After 1.5 cm seedlings or 1.5 cm in length, they can be assigned to 16- 18 head held in temporary cage. Holding cages for 8 layers, each layer is seeded with about 500 grains, that is, a cage is 4000 grains. When the seedlings grow to more than 2.5 centimeters, they can be reared to the rearing cages in time. Eight cages are raised, and the amount of seedlings placed on each layer is controlled between 40 and 50, that is, a cage of 400. Too much will affect the growth of scallops and too little waste of culture equipment. In the whole breeding process, the first step is to be divided into seedlings in a timely manner. This is the most effective way to increase production. Sub-seedlings should be emphasized in shaded areas, and open-air or rain-seedling should not be allowed. The shorter the drying time is, the better the sub-seedling time is. It is better not to exceed 1 hour. The good seedlings must be returned to the sea in time. The second is to often wash net bags, cages, remove silt and attached organisms. The third is to frequently add floaters to prevent the main cable from sinking after shellfish growth and weight loss. Fourth, we must constantly inspect and reinforce aquaculture facilities so as to be absolutely safe. The fifth is to strengthen maritime safety management. It is best to install some warning lights around the culture area to prevent ships from passing and damaging the breeding facilities. Sixth, it is necessary to measure hydration factors such as water temperature and salinity on a daily basis, measure the growth of shellfish regularly, and make records. When the water temperature is high, in a deeper sea area, the raising cage can be raised to a level below 4-5 meters. It is advisable to use a scallop cage without mud, which can not only avoid the heat, but also reduce the attachment of attached organisms. Good anti-wind effect, to win the harvest of scallop breeding.
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