Qinghai introduces new species from Russia
High white salmon, a new fish species introduced from Russia, will be popularized on a large scale in Qinghai Province. the introduction of this "exotic fish" not only breaks the previous single aquatic pattern in the province, but also makes the fishery of Qinghai Province take a step forward to the international market. In order to make the aquaculture technology of high white salmon more mature in the aquaculture field of the province, Qinghai Province recently invited Alexander Ivanovic, president of the Russian Union Siberian Fisheries Research Academy and academician of the Russian Academy of Sciences, to Qinghai for technical analysis and provide market information. High white salmon is a kind of fish with fast growth, delicious taste, low cost but high economic value, and has a share in the international market. as a new object of breeding, it has attracted the attention of many countries, and its growth source is mainly from the vast freshwater waters of Russia. Due to the characteristic that high white salmon is suitable for cold large water surface culture, Qinghai Province introduced 40,000 high white salmon hair eye eggs at the beginning of this year, and the effect is good. According to the survey, there are about 3 million mu of cold water resources available for development in Qinghai Province in the near future, and there is a broad position to vigorously promote and demonstrate high white salmon. To this end, Qinghai Province has decided to introduce 3 million eyed eggs every year from next year to be cultured in large surface lakes and reservoirs such as Krook Lake and Datong Jingyang Reservoir, and the number will reach 1 million this year. First, it will be cultured in the ponds of Nanmenxia Reservoir and the province's original fish breeding farm. According to the area of 3 million mu, it is estimated that the annual output of high white salmon is more than 6000 tons, and the output value is 84 million to 100 million yuan.
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Pay attention to fishing in midsummer
First, prepare to reduce the amount of bait one day before fishing, and remove obstacles such as branches (stakes) in and around the pond as well as grass residue pollution on the water surface in time, so as to pull the net smoothly. Second, timely fishing can generally choose to fish when the weather is relatively cool in the morning and when fish activities are normal, and avoid fishing in abnormal conditions such as muggy weather and fish floating heads, so as not to cause unnecessary economic losses. Third, in order to standardize the operation, we should choose the nets with appropriate mesh size, so that we can get off the net slowly and quickly, and minimize the number of net-pulling and cutting.
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Can turtles and fish be mixed?
Turtles and fish can be mixed. The proportion of mixed culture of tortoise fish is 300 silver carp (20g / tail), 80 bighead carp (25g / tail), 120 grass carp (125g / tail), 80 common carp (25g / tail) and 80 blunt snout bream (12.5g / tail) per 0.07 ha. Then about 1200 3-year-old and 6-year-old turtles are released. The stocking of fish species should be before the Spring Festival, and the water temperature of turtles should be stabilized at 15 after the beginning of spring.
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