1. Oyster is the fattest in the Qingming period of the following year in June 5438+February, but its market time is165438+1October to May of the following year. Since oysters are generally stocked in May and can be caught in about six months, they can be eaten in June from 5438+065438+ 10. However, after entering June 5438+February, the weather began to get cold, the consumption of oysters was low, and the energy accumulation was high, so the meat quality of oysters was relatively fat until next year in Tomb-Sweeping Day.

2. Oysters are oysters, and their seedlings come from semi-artificial seedling collection. Oysters can mature and reproduce after one year of gonad development. The gonad of oyster is mature, and the peak spawning time is at 24 ~ 25℃. The breeding peak of oysters in Xinghua Bay, Putian is from May to June, and most of them lay eggs in flood season. The temperature in the sea area is suitable. The fertilized eggs of oyster develop into D-shaped larvae within 20 ~ 22 hours, and the average shell length of the larvae is more than 280μ m. When the larvae have 40% ~ 50% eye spots, they can be put in to make the larvae attach abnormally. Based on many years' experience, aquatic technicians in Xiuyu District have tested oyster seedlings in this sea area. Once the oyster seedlings are mature, they will be sent through the platform to guide farmers to put the attachment base in time.

3. Generally, its seedlings can be picked from local materials, and oyster shells are used as seedling pickers, with low cost. According to years of experience in seedling collection, oyster seedlings grow vigorously and in large numbers from May to mid-June every year. Inspection of seedling picking effect: when picking seedlings, we often go out to sea for inspection, and we can see oyster seedlings with pinhole size 3 ~ 5 days after sticking seedlings. If barnacle seedlings are attached, they should be cleaned in time and picked again. Don't miss the seedling picking season.

4. The oyster seedlings in raft culture should be kept in the harbor for more than one month temporarily, and they can not be cultured in the sea until they are not easy to fall off. 4 ~ 5 days before seedling division, several punctuation marks were set up in raft culture District, and several strings were taken for trial cultivation to judge whether oyster seedlings can adapt to the attachment of harmful organisms in the sea area, especially the attachment degree of barnacles; If barnacles are attached more, suspend going into the sea. The breeding cycle from seedling collection to harvest is about 10 month. In the process of oyster culture, the emphasis is on management, including artificial control of culture density, floating ball to adjust the water layer, and oyster seedlings hanging in the sea for about 3 meters to adapt to the survival of the seedlings. As the larvae grow up and their weight increases, adjust the water layer with floating balls in time; It is often reinforced to prevent typhoon attacks. When the typhoon comes, strengthen infrastructure construction in advance and arrange it in time after the typhoon. When the load of oysters increases before harvest, buoyancy should be increased to prevent the raft from sinking.

5. raft culture oyster in shallow sea is easy to harvest, which greatly reduces the labor force and improves the economic benefits. Oyster consumption demand is growing steadily and the market is active. The breeding period of oysters starts from dew autumn and enters the fertile period of water quality. 1 ~ 2 months later, the fullness of oysters reached its peak. According to the market demand, oysters can be caught when they meet the commodity specifications.