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1. Adult eco-physiological habits (1) Living habits: Adults inhabit the dark springs of the Yinhe River in the natural environment. Artificial breeding inhabits artificial caverns.
(2) Feed: Adults are carnivorous animals. The feeds are divided into two categories: fresh and frozen animals (but not containing excessive fat) and artificial compound feed.
(3) Water temperature: The determinants of adult growth and gonadal development. The suitable range is 16-25°C, and the best range is 18-23°C.
(4) pH: The suitable pH of the adult is 6.5-7.5.
(5) Illumination: Adults are backlit movements. The salamanders are photophobic and require a light intensity of 100-500 lx.
2, feed and feeding methods
2.1 Types of feeds Baby carps are carnivorous animals, and their natural feed resources are very rich, mainly fish, shrimp, frogs, shellfish, loach, chickens and ducks embryos, lamb, beef, rabbit meat, quail, etc., artificial compound feed can use catfish feed We have developed artificial compound feed for giant salamanders. The bait coefficient of natural baits raising adults is 3.5-6.3. The formula of feed for adult diets is 2.8-3.6. All localities can decide on feeding species based on local feed resources.
2.2 Feeding In order to improve the breeding efficiency of the giant salamander and reduce feed costs, it is necessary to understand the ability of adults to digest, absorb, and utilize nutrients in the feed prior to feeding, in order to determine reasonable feeding. Reasonable feeding includes issues such as nutrition, growth, metabolism, physiology, ecological environment and feeding factors, feeding times, feeding methods, and feeding principles of giant salamander.
(1) Feeding time and frequency: The baby carp is fully digested and absorbed under proper temperature conditions. Usually, feeding is performed once for 2-3 days. If the humidity is lower than 10°C, it is fed once every 5-7 days. The giant salamander is nocturnal and feeds at night. Therefore, the summer feeding time is 8-10 o'clock in the afternoon and the winter can be 6-8 o'clock in the afternoon.
(2) Feeding amount: There are many factors affecting the feeding of the dollfish, such as water temperature, dissolved oxygen, water quality, diseases, feed varieties, and feed quality.
Water temperature is an important factor influencing the feeding of the giant salamander. Because the salamander is a variable temperature animal, the body's physiological metabolism changes with the temperature of the water. In the optimum temperature range of the giant salamander, its feeding and growth are positively correlated with the increase of water temperature. In general, feeding above 12°C, the food intake is the highest at 18-23°C, and the growth is also the fastest. The water temperature rises above 26°C, and the food intake decreases. At 28°C or above, it enters the "summer sleep." At the appropriate temperature and the same feed quality conditions, dissolved oxygen and water quality play a major role. Therefore, the amount of adult feeding should be determined by combining various factors.
(3) Feeding methods: Feeding and feeding should be based on the biological learning and ecological habits of the juvenile fish to determine a reasonable feeding method. In order to improve feed utilization and reduce feed costs, feeding must adhere to the four-time feeding method, ie, timing, positioning, quality, and quantity.
1 timing is based on the characteristics of nocturnal creatures learning to feed on time and feeding at the same time, but also according to the season, water temperature, water quality, appropriate to advance or postpone. General feeding time: 10 o'clock in the evening in the summer, 8 o'clock in the winter.
2 Positioning to develop a baby fish positioning eating habits, can promote the concentrated feeding of giant salamanders, cluster feeding can not only improve the appetite of baby fish, increase food intake, but also can reduce feed dispersion, improve feed efficiency.
3 If the ration is artificial feed, it should be kept at a low temperature, dry and free from moisture. Adults have different feed additives due to different purposes. In order to increase the utilization of protein in feeds, the feed must be prepared with oils and fats, and fish oil and vegetable oils are generally required. The amount of oil added increases or decreases with water temperature. When the water temperature is 18-23°C, add 5% of fish oil and corn oil. When the water temperature is 14-17°C, the amount of oil added is 5%-6%. No fat is added below 12°C. Natural baits require fresh and clean, and must not be fed for deteriorating bait. Natural baits are ideal for feeds such as loach, cod, squid, and chicken and duck embryos.
4 Quantitative According to the different factors such as feeding, digestion, individual growth, individual size, water temperature, and water quality of the giant salamander, appropriate amounts of feed should be given.
Feeding technology for baby dollfish feed
Feed and feeding is a central part of the whole culture technology of giant salamander. The quality of feeding and management work on adult growth and development. There is an extremely close relationship between the occurrence of polyposis, stable water quality, and the survival rate of adults.