Artificial propagation and cultivation of freshwater lobster shrimp (2)
810nm Diode Laser Hair Removal System Hifu Skin Rejuvenation,Hifu Skin Lifting System,Hair Removal With Ce Haosheng Pneumatic Machinery Co., Ltd. , http://www.nb-tattoo.com
Prior to the release of the broodstock, the shrimp ponds should be routinely disinfected and 800 kg of fermented rotted straw or weeds should be applied per mu. The pool is equipped with nets or bamboo tubes, plastic tubes, etc. as broodstock inhabits, shelling, concealed places. 4. Cultivation of broodstock When broodstock is stocked, it is necessary to do a safe winter and strengthen feeding and management. Since March, animal feed has been introduced, mainly spit meat, livestock and poultry slaughtered waste, supplemented by some high vitamin feed. Daily feeding amount: In March, 2%-3% of the body weight of broodstock, 4%-5% in April, and 6.5%-8% in May. At the same time strengthen water quality management, change the water once every 10-15 days, change the water every time 1/3, in order to promote gonads development of broodstock. 5. Breeding of broodstock In April-May, when the water temperature reached 20°C, broodstock began mating. At the time of mating, the males discharge the sperm into the seminal vesicles of the females and save them before the females spawn. From June to July, it was the peak of mating and spawning of broodstock. The suitable incubation temperature for the fertilized eggs is 22-28°C. Fertilized eggs hatch into juvenile shrimp in the female's abdomen. The incubation time is 40-70 days. After hatching, the juvenile shrimps are all attached to the maternal abdominal swimming feet, and under the protection of the mothers, the growth and development of the larval stage are completed. When young shrimp leave the mother, they can take food and live independently. When a large number of juvenile shrimps are found in the breeding ponds, the seedlings should be collected in time to cultivate the shrimp species. (Anhui High Efficiency Agricultural Technology Research Institute Zhang Xiangzhao Zhu Juan Hefei 230001)