New breeding variety Xianke giant crucian carp
Crucian carp is an omnivorous fish species mainly based on plant feed. Its living water temperature, feeding water temperature, growth water temperature, pH value and salinity are 0.38 ℃, 1035 ℃, 1532 ℃, 58.5 and 0 ~ 7 ‰, respectively. The giant crucian carp has a strong ability to adapt to bait, and the juvenile stage mainly feeds on plankton. When the body length reaches more than 6 cm, it begins to take plant feed and eat both organic detritus and commercial feed. Xianke giant crucian carp grows fast and can grow to 0.6-1.5 kg for half a year to one year. Its body shape, body color and meat taste are good, and it has the advantages of strong disease resistance, cold resistance, hypoxia tolerance, long-distance transportation and so on. Xianke giant crucian carp is not only suitable for pond, lake purse seine, river and lake reservoir cage high-density culture, but also suitable for mixed culture with pond culture fish.
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Selection skills of eight kinds of turtles
Tortoise: it is required that the carapace of the male tortoise is black, the base of the tail is thick, and the depression in the bottom plate is long and deep; the tortoise of the female is short and thick, and the tail is thick and short, it is best to choose the tortoise over 8 years old, the weight of the female turtle is 350g, and the male tortoise reaches the age of gonadal maturity, the ratio of male and female is 2 ∶ 1 to 3 ∶ 1. Money tortoise: when choosing, hold it over with your hand, its head will stretch out very long, the thickness is uniform, and the eyes will move flexibly. The skin is bright, the temperament is gentle, the distance between the upper and lower nail of the tail is large, and the cloaca is wide. Turtles over 6 years old are required. Female turtles weigh 1250 grams to 15 grams.
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Improve the disease prevention system of soft-shelled turtle
1. The construction of aquaculture facilities that meet the ecological requirements, including aquaculture engineering facilities, water source and water quality management, etc. two。 Carry out scientific feeding management and daily operation, and use high-quality, full-price, diversified and pathogen-free feed. 3. Choose healthy seedlings for breeding. Try to cultivate young and young seedlings on the spot, and at the same time avoid introducing foreign seedlings, especially imported ones, to prevent secondary infection of pathogens. Even if introduced, strict quarantine and isolation observation must be carried out.
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