The ratio of fish to egg is the most suitable.
Since the first requirement of fish for nutrients is to satisfy energy requirements, energy is the basis of fish feed quality from the point of view of fish nutrition. The energy in the feed is the sum of the energy contained in the three major nutrients in the feed-protein, fat and sugar. As a nutritional component, protein is not only the main energy-supplying substance, but also has extremely important physiological functions, and these physiological functions cannot be replaced by fat and carbohydrate, and the demand for protein by fish is particularly high, so protein is the first nutritional component to be considered in feed. Therefore, fish nutrition experts have raised the relationship between energy and protein, how much energy and how much protein should be contained in the feed is reasonable, energy protein ratio (referred to as energy-protein ratio) is an indicator to measure it, it refers to the ratio of total energy (thousand joules) and crude protein (grams) contained in each kilogram of feed.
Energy-protein ratio has important practical significance in fish nutrition. A suitable ratio of energy to protein in feed is beneficial to the utilization of energy and protein, thus improving the utilization efficiency of feed. Therefore, it is very useful to study the suitable energy-egg ratio in fish feed for improving feed utilization efficiency and breeding effect. For example, the optimum energy-to-egg ratio of grass carp diet is 36.8~57.7 at juvenile stage, the optimum energy-to-egg ratio of black carp diet is 38.1, and the optimum energy-to-egg ratio of bream diet is 36.
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Prevention and treatment of common diseases of turtles
Turtles have strong vitality and disease resistance, and fewer diseases, but under artificial feeding conditions, due to the influence of many factors, such as breeding site, temperature, bait and so on, various diseases sometimes occur. Therefore, we should pay attention to observation at ordinary times, and once an anomaly is found, we should prescribe the right remedy to the case in time so as not to cause economic losses. In this paper, the prevention and control methods of common turtle diseases summarized by Jiang Zhanglin, the "turtle king" of Longtou Pavilion Animal Farm, Yuanhua Town, Haining City, Zhejiang Province in the past 10 years are introduced as follows: first, traumatic inflammation due to rough feeding pond
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It is fastidious to inject medicine into sick turtles.
Because the tortoise has a very hard carapace, once the tortoise gets sick, it is very different from other animals in treatment. Practice has proved that injection is the most effective way to give medicine to sick turtles. The following technical problems should be paid attention to when injecting turtles. 1. Never use long or thick needles. The tortoise body exposes less muscles, generally only slightly more muscles at the base of the front and rear limbs, but the area is not large. So choose a thinner and shorter needle. The injection depth is generally 0.5 cm for small turtles, 0.8 cm for medium turtles and 1.2 to 1.8 cm for big turtles.
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