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Oyster Oyster Breeding Technology
In the past ten years or more, oyster culture methods and breeding techniques have mainly carried out scaffolding (framework) type seedlings, hanging type (simple hanging type, hanging frame hanging type), squat type (floating type, bamboo type) ) Several items of aquaculture and glutinous finishing have achieved results. (1) Shed frame (frame) type picking seedlings: There are two types of methods for picking seedlings in the shelving type, hanging seedlings and hanging seedlings (prone horizontal). 1 Shelf hanging type seedlings: Shelving is composed of a number of 2.52.52.0 meters (high) single frame sub-type rectangular parallelism (Figure 12). Frames (piles), straight beams, and beams are made of cement reinforced products. Piles are 10 cm 10 cm 3.5-4 meters. Straight beams and beams are 8 cm, 10 cm, and 3 meters. A 0.5 meter or so frame is used to lay bamboo rods equidistantly for the purpose of suspending seedlings. Attachment devices are used in Guangdong. The Ishihara consists of plates and slabs of cement and oyster shells, with 108 yarns of polyethylene rope or 100 pounds of four strands of rubber wire rope into 8# lead water and iron wires, and small plastic pipes or bamboo pipes of 3-4 cm in length are connected in series. Hanging or hanging on bamboo poles. In Zhejiang Province, the attachments of bicycles and bicycles are often twisted into ropes using waste tires. This type of applicator has a long service life, low cost, convenient transportation, and good results. This kind of scaffold is usually set at a depth of 2 meters below the smooth low tide, and the surface of the scaffold is slightly exposed on the surface of low tide. As juveniles are less exposed or empty, juveniles have a good growth. When hatchlings are raised in the second half of the year, juveniles are usually larger than the seedlings harvested near the low-water line. 2 Shed (frame) flat hanging picking seedlings: Use a cement stick or a bamboo stick on a beach near the low tide line to build a sub-frame with a height of 10 meters, a width of 1.2 meters, and a height of 0.3 meters. Assemble asbestos tiles, cement sheets or oyster shells with a small plastic rope at a distance of 3 cm or so, and tie them with 8-10# lead water iron wire on the straight beams of the frame for flat (prone horizontal) mining. seedling. The seedlings collected by this method are dense and uniform, but the growth of young larvae is slightly slower than that of the "hanging type". (2) Fixed hanging type culture: 1 Simple hanging type: also known as pile type, its structure is connected to Lux cable (cable) on the pile (Figure 14). Piles of cement products cement piles, wood and bamboo piles. At present, the cement piles used in Zhuhai City, Guangdong Province are mainly used for cement piles with specifications of 0.150.155-6 meters. They are made of 200# reinforced concrete structures and use 10 mm and 6 mm steel bars as main reinforcements and hoops. The pile frame should be placed on the seabed with a depth of 1.5-3.5 meters under low tide. The planting depth is 1.8-2 meters, and the distance and row spacing are both 6 meters. 25 piles per acre. Rope diameter 1.8-2.0 cm, with a spacing of 0.4 meters to hang a string of farm rope, each string of 5-10 pieces of cement in series or asbestos tile attachment, weigh about 650 strings per acre. In autumn and winter, the seedlings were raised and harvested, and they were harvested for two and a half years. The yield was 642 kilograms of fresh quail meat, the production value was 5,827 yuan, and the net profit was 2,197 yuan. The Longhai County of Fujian Province uses the bamboo pile. Pile length is generally about 2 meters. Pile distance 2-3 meters. Due to the limited water depth of the local area, the simple breeding frame is mostly set up and down 1 meter below the low tide line. Reins 1603 Lux Rope, attached to a perforated oyster shell, with (15-20) 3 Lux cables in series, each with 10 blocks, 8-10 cm apart. The seedlings were harvested in May-June of the same year, divided into seedlings from August to September, and raised until March-April of the following year. The length of the shell was generally 10 cm, and the harvest time was from January to April of the following year, and the meat yield was 15-25%. On average, 300-400 kilograms of fresh meat is produced per acre (1000 mu). With a production cost of 400-450 yuan per mu and a useful life of 2-3 years, the profit per mu is about 700 yuan. 2 Scaffolding: In the past 10 years, this farming method has been commonly lost in Yueqing County, Zhejiang Province. The structure and arrangement of the scaffold and the attachment and the like are as described above. From June to July, the rubber strips and other attachments were hung under the scaffolds at a distance of no more than 2515 cm. The seedlings were then planted at a distance of 5040 cm, and they were usually harvested for 7-9 months. Mu produce fresh meat from 1,000 to 2,000 kilograms, which is very effective. (3) Cocoon Breeding: 1 "Floating cocoons": The above is a brief description of oyster fattening cockroaches for breeding cockroaches. Every autumn, the seedlings collected in summer, usually grown to a length of 2-4 cm, or in spring, summer, autumn and winter, will be dredged and dredged up to 4-7 cm in length collected last summer. Hanging raising ropes often use 100 pounds of 4 strands of plastic yarn or 8-10# lead-water iron wire or satin (lap) fiber ribbons. Generally, each plastic rope with a length of 6-10 cm is used for each sling, and 10 attachment bases with a seedling are connected in series. Pieces of attachment bases are divided into two series: positive and negative strings. According to the South China Sea Fisheries Research Institute's 1986 technical appraisal data of Dacron and the production data of the Shajing Industrial Estate for many years, the use of asbestos tiles and cement sheets as attachment bases, sheds were collected for 4-5 months and maintained for 18 months, for a total of 1 year. The 7-8 months old Ogi oysters have an average shell length of 10.89-11.56 cm and a shell height of 6.85-7.40 cm. The fresh meat rate is 14.0-16.16%. The harvest yield is 600-1100 kilograms of fresh oyster meat (84 square meters, average hanging 500 strings) (equivalent to the traditional "ground-seeding" 2-3 acre area for 4 years of production). After deducting the cost of production, the net profit per unit of the breeding cycle was 2936.20-6259.50 yuan. In the spring, the young cubs that are bred and reared for several months can be harvested at the end of the year and the results are good. 2 "Bamboo-style": Bamboo-type refers to the bamboo bamboo squat made from bamboo (even ç). Each scorpion is composed of 10-12 pieces of 12-meter long and 7-8-meter wide singly knots. The two ends of the scorpion are anchored by iron anchors, piling or stone sinkers weighing 30-40 kilograms. This form is only suitable for aquaculture in the reclamation area or in the inner bay where the storm is calm. In recent years, bamboo-type oyster breeding fever has been set off in the areas around Lupin and Nan'ao in Guangdong. According to statistics, in 1990, Jingzhou Town in Raoping County was developed to more than 1,500 mu. Every autumn, the eel raiser ships from Longhai County, Fujian Province, and collects seedlings that were raised to 3-5 cm in the same year. After several months of hanging and raising, the shell length is increased to 7-12 cm. It is said that for every mu (1 mu for hanging 1000 strings, generally 10-12 pieces for each series of oyster shells attached in series), 1200 kg of fresh meat will be produced, and a net profit of 3000-4000 yuan will be obtained. The main features of the culture method are: simple method, short breeding cycle, quick effect, and the oyster clams of the Oyster cultured are thin, and the meat out rate is high (the general fresh meat rate is about 25%), the benefit is significant, the disadvantage of which is that the buoyancy is low Poor wind resistance. It is recommended to properly assist plastic floats under the body in order to increase buoyancy and increase the amount of resuscitation.