Russian squid introduction techniques
The carp, which had lived on the earth 200 million years ago, is known as the "living fossil." It is delicious and nutritious, and its egg is called "black gold." There are 27 species worldwide and 8 species in China. In recent years, China has started feeding trout, which is still at the stage of exploration and technology accumulation.
On October 29, 1999, Zhejiang Wenzhou Shengfa Aquatic Products Co., Ltd. introduced 1200 species of Russian squid species for adaptive breeding; on September 10, 2000, it introduced 2,500 species of Russian squid species for productive trials. Two careful farming, each for more than one year, have been successful. The first case of Wenzhou City. In the near future, this adoption technology project passed the acceptance of the science and technology department and was well received by experts. The introduction of the company's introduction of technical points, as described below.
I. Biological characteristics (I) Morphological characteristics Russian worms are spindle-shaped, head length is 17% to 19% of full-length, kiss length is 4% to 6.5% of full-length, kiss is short and blunt, slightly rounded . The four tentacles are located between the snout and the mouth. There must be no umbrella cilia on the mouth and the mouth is small and prominent. Body covered with 5 rows of bone plates, pale golden yellow. Dorsal fin 27 to 51, not branched; anal fin 18 to 33, not branched. The back is gray-black or dark green, gray-brown on the side of the body, and gray or yellowish brown on the abdomen. Juveniles have a blue back and a white belly.
(II) Habits Russian oysters live in pale seawater with a salinity of 0 to 30 ,, and staple benthic molluscs, as well as crustaceans and fish such as shrimp and crab. Growth temperature 5 °C ~ 30 °C, the optimum temperature is 18 °C ~ 24 °C, dissolved oxygen is generally greater than 6 mg / l, water hardness requirements for 5 ~ 8.
Second, materials and methods (A) The pond is generally an outdoor cement structure, each pool area of ​​48 square meters to 50 square meters, with a total area of ​​1.2 acres. Cement pool around the corner, the bottom of the "pot shape", the slope is about 1% ~ 2%. At the bottom of the center, a sewage outlet of 1 m2 to 2 m2 is set. When the water is flushed, it is flushed with the pool angle of 45°. The entire pool of water can be rotated and the bottom dirt is automatically transferred to the middle and discharged from the sewage outlet. The pond is convenient for drainage and drainage, and has sufficient water supply for micro-flowing water or flow-type farming. Above the pool should be shade sheds, winter nylon film insulation, summer sun shade with a black sun, to prevent sunlight exposure and high temperature.
(2) The water sources shall be supplemented by flowing water in the ravine, and the groundwater in the downstream of the reservoir shall be pumped in by two methods. The water quality should be refreshing. The water temperature is generally 8°C to 30°C. The amount of water changed every day is about 40%, and the water depth is 1.2 meters to 1.5 meters. Before stocking, each pool was sprinkled and disinfected with “strong chlorine†1.5ppm Quanchipu. After stocking, disinfect with “dibromohydantoin†0.5ppm once a week. After disinfection, use 3ppm photosynthetic bacteria to sprinkle and cultivate water quality.
(3) Equipment and facilities Each 1.5-kilowatt blower-type air pump is used in each of the 3 pools. A total of 4 blower-type air pumps are used. Each of the four pools is equipped with a 2-phase 1.5-kilowatt water pump. The air-conditioning is inflated once a day at noon every day, and it is turned on at 1 pm after midnight. Oxygen pump to 8 o'clock in the morning, from 4 am to open the pump to add water to change the water cycle, to 7 am to 8 o'clock in the morning to ensure adequate dissolved oxygen. During the aquaculture process, measures should be taken to increase the self-discharge of landscape water, increase the amount of automatic water exchange in the ponds, and strengthen night-time patrols and water quality monitoring. In the summer and fall seasons, it is necessary to increase the amount of water to be exchanged in order to reduce the temperature and increase the dissolved oxygen. Basically, it is necessary to exchange 60% to 70% of the original amount of water each day.
In each pool of water, hang 3 to 4 food stations to facilitate observation of the feeding situation of carp.
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