Squid is one of the most efficient aquaculture species. In recent years, the market price of squid has fluctuate and declined. However, the selection of squid varieties such as European oysters with abundant seedling resources and low prices, and the development of sea cages for development have good prospects and high economic returns. I. Water quality environment It is advisable to set up cages in the sea near the estuary where the water surface is open, the water quality is good, and the wind speed is low. The water temperature is required to be in the range of 8°C to 30°C, and the current speed is less than 1m/s. The best flow rate is 0.5m/s. Second, the cage size Catfish mariculture using 3 meters 3 meters 3 meters or 6 meters 3 meters 3 meters of seamless mesh cage is appropriate. Its mesh specifications are: raising black pupae, puppies 0.5 centimeters, raising pupae 0.8 centimeters. Place a 1 m 0.5 m 1 m multi-layer net cage in the cage as a squid resting platform, and keep 15 cm of the net cage open to prevent escape when the squid is tight. Third, seedlings are best stocked with squid in order to put their rearing density at 150 per square meter. If black puppies are released without pups, the density is 500 pounds per square meter. Before the seedlings are placed, they should be disinfected with a medicine bath to prevent infection. IV. Feeding Management 1. Water Quality Management Water quality management of trout farming is particularly important, requiring a specific gravity of 1.01 to 1.02 for seawater, 5 mg or more of dissolved oxygen, and a pH of 7 to 8.5. In recent years, some aquaculture farms have used the Sino-Japanese co-produced microbial preparation EM, exposed water, immersed and mixed feeds, and prevented fish diseases, and gained successful experience and gained good economic benefits. 2. Feeding feeds Feeding squid should be done with "four settings." That is, timing: In addition to feeding the feed once a day at 8 o'clock in the evening in the early spring and winter, the rest of the time is given at 5 o'clock in the morning and at 8 o'clock in the evening; positioning: feeding on a fixed set of bait stations; Quality: Total feed supplemented with polyvitamins for squid; Quantitative: Total dietary weight calculated as a percentage of the total body weight of squid, 15% adult larvae, 3% young larvae, and black sorghum About 5%, high temperature, wintering period is 0.5% -1%. 3. In time, the density of the squid after boxing is greatly increased after being raised for about one month. The individual differences are even more disparate. They must be screened and bred in a timely manner, separated by physical strength and individual size. Careful and meticulous procedures should be used in the screening and binning process to avoid scratching the fish, preventing infection, and disinfecting the bath. 4. Replace cages In order to keep cages clean, prevent diseases and ensure unobstructed water exchange, cages should be replaced in time. The summer and autumn seasons are replaced once every 10 days, and once every 50 days in the early spring and winter. The changed network should be cleaned immediately for the next use. 5. Daily management Group management of cages. Daily testing of water quality, good weather, water temperature, pH, feeding, disease prevention and other detailed records. Observe the feeding and growth of squid, find problems, and deal with them in time. Fifth, prevention and treatment of disease Fish farming to raise water, good water quality is the key to prevent salmon disease. The principle of "prevention from being the main" should be taken preventive measures. If the water quality in the cage is contaminated but not ruled out, there may be outbreaks of rotting, rotting, de-tacking, and “dashing disease†and various parasitic diseases at high temperatures. Maintaining the water body under the effective control of beneficial microbes is a necessary condition for the success of raising fish, and it must not be taken care of. When the bacterial rotten disease and other symptoms occur at a time with 100 times the high concentration of EM original dilution diluted diseased fish can also be used 10 times -50 times the ultra-high concentration of EM original dilution directly rubbed the affected area, usually 4 days -5 days Can heal. When bacterial enteritis occurs, a high concentration of EM decoction diluted feed can be fed immediately and the effect is very good. However, in the event of a viral disease, the patient will be symptomaticly treated in emergency, otherwise it will result in loss.
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