In recent years, bamboo shell fish in Guangdong have always maintained a relatively stable and abundant breeding profits, so that many farmers are excited, but the special requirements of bamboo shell fish on the living environment, food species, built a Technical barriers, low survival rate in seedlings, and difficult-to-treat diseases have always been insurmountable barriers for early entry farmers. In the face of the following difficulties, farmers how to deal with it? Difficulties One: Misaligned and Insufficient Supply of Open Baits Countermeasures: Raise small fish shrimp, fatten bamboo shell fish According to experts from the aquatic industry, the 15 days after the fertilized eggs hatch into water splashes is the key period. The key to determining the survival rate of the seed is whether or not the opening baits are adequate for the mouth and supply. At present, the survival rate of seedlings grown from fertilized eggs to 3 to 4 cm in size is generally lower than 20%. This is a difficult point for the breeding of bamboo shellfish and it is also one of the reasons for the relatively high seedling price. Shunde District, Shunde District, has many years of experience in bamboo shoot fry breeding Zhou Han Teng (Lunjiao Town, Mengliu fish farm head) believes that the cause of the low survival rate of bamboo shoot shellfish survival is mainly due to the fact that the live shellfish live fish feed cultivation is not resolved. "It is usually necessary to cultivate or directly purchase small-scale fish such as wheat bran in various sizes for 3-5 months in advance and feed on bamboo shoots of 1 to 4 cm in diameter." It is reported that most farmers still use the "red bug". (Clam-like aquatic microorganisms are commonly known as open-ended baits for bamboo shell fish, but Zhou Hanteng suggested that “After these years of breeding, it was found that using red worms as bait, the early stage has little effect on the growth of bamboo shell fish, but due to red worms With a large number of bacteria, bamboo shoots have more bacterial diseases in the later stages of growth. It is best to use wheat straw as a live bait for shellfish to reduce bacterial infections. Feng Jinghe, head of the Fengshi Aquatic Products, Shunde District, agrees. He said, "As the saying goes, 'keeping good fish, shrimp, fish and shellfish' refers to the importance of suitable live bait. When stocking 3 cm of seed, it is necessary to stockpile water in advance one week, generally 1,500 per mu. Millions to 20 million tails." In another development, in order to reduce the pollution caused by feeding chilled water to the environment, there have been feed companies launching shellfish fish powdered feeds, chilled fish fed together with fish, and some fish growers in the latter period of growth. While using chilled fish, live fish foods were fed together to enhance the feeding activity of bamboo shell fish. Difficulties 2: Eat small and kill each other Countermeasures: Divide at least once every 2 months For bamboo fish, below 6 cm belong to the period of seedlings, dominated by floating live prey. If the supply of live food in the pond at this time is insufficient, they can easily kill each other, resulting in a low survival rate and affecting the production of commercial fish in the later period. It has been learned that in the early days, farmers raised tens of thousands of fish shellfish, and in the absence of frequent ponds, there were many similar cases that only harvested several thousand. "Therefore, in addition to supplying enough feed, it is also necessary to divide the ponds." Zhou Hanteng suggested that from the 1 cm culture to the market specification of about 1 kg, at least 5 to 6 times of the ponds should be divided every 2 months. . Feng Jinghe believes that in the seedling period, if the conditions allow, if the interval between the diversion pond can be shortened to 40 days, the effect will be better. "When performing the sub-tank operation, sunny, early, or cloudy days should be selected to avoid high temperature damage to bamboo shoots." In addition, since the shell fish need to be divided frequently, several ponds must be prepared to divide the fish of different sizes. "At least three or more ponds should be prepared. If there are no more than one pond, we can't grow bamboo shoots," said Zhou Hanteng. Difficulties 3: Difficult to treat late diseases Countermeasure: Disinfect the body of water regularly with sea salt In recent years, the diseases of bamboo shellfish mainly include rot disease, gill disease, mold mold, water mold disease, gastrointestinal disease and parasitic disease. According to the farmers, it is more difficult to treat bacterial shellfish, mold and gastrointestinal diseases. "If we want to raise this fish, we must take precautions seriously. In the event of disease, the mortality rate is usually high," stressed Zhou Hanteng. "In prevention, avoid using drugs indiscriminately. Before every release of bamboo shell fish, do disinfection of clear ponds. During the breeding process, salt is splashed once a month on the pond. Each time about 50 kg per acre is used to disinfect the body of water. Good preventive effect.†In addition, in the high-temperature period, aerators should be opened. As for the gastrointestinal diseases commonly found in bamboo shoot fish, Feng Jinghe proposed recommendations based on his breeding experiments in recent years. He could mix some Chinese herbal medicines such as rhubarb, astragalus, cork, coptis, and honeysuckle with heat-clearing medicines in the feed. Certain disease-preventing effects, pay attention to match the specific growth of bamboo shellfish with drugs and control the amount of use. Difficulties 4: Cold winter is easy to suffer death from freezing Countermeasures: Set up wintering sheds as soon as possible to ensure good wintering management The fish shellfish culture period in Guangdong is generally more than one year, and the shellfish are tropical fishes, which are easily frostbite or frozen during the winter. At present, the Pearl River Delta region has used overwintering greenhouses as a way to help bamboo shell fish overwinter. Professionals suggest that building a wintering shed should be done as soon as possible. Generally, preparations can be made by the end of October, otherwise it is easy to be caught off guard by the cold wave raid. For example, in mid-November 2009, the first cold wave struck in South China, and most farmers were not prepared, resulting in heavy injuries. A breeder who suffered losses last year suggested that “not only wintering breeding seedlings have to be constructed for wintering sheds, but also for ready-to-list fish, it should not be taken lightly.â€
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