CATDOLL : CATDOLL: What are the factors that affect the survival rate of baby rabbits?

1. What are the factors that affect the survival rate of young rabbits?

Hello, my name is Qing Gege. More and more people are raising rabbits, so let me answer this question!

Survival rate is an issue that the breeding industry must pay attention to, because it is related to the direct economic benefits of breeding. Since the bodies of young rabbits have not yet matured, their resistance is weaker than that of adults. Rabbits at this stage are also more susceptible to diseases. So how to improve the survival rate from a technical level?

The factors that affect the survival rate of young rabbits are mainly as follows:

1. When young rabbits are weaned, they are in poor physical condition, malnourished, and have weak disease resistance. If other supporting measures are not taken, they are easily infected with diseases and die.

2. Irrational diets. A few farmers pursue rapid growth of young rabbits and blindly prepare high-energy, high-protein diets, which have the opposite effect, causing a large number of young rabbits to die from diseases such as Clostridium perfringens. Some farmers still use traditional feeding methods after introducing improved breeds, feeding only grass, or simply preparing diets that do not meet nutritional requirements, resulting in malnutrition and weakness of young rabbits.

3. Improper feeding. Many farmers have a strict feeding system, but do not feed rabbits at regular times and in irregular quantities, which causes the rabbits to be hungry or full at irregular times, overeat, and cause digestive diseases such as indigestion.

4. The epidemic prevention system is not sound. Some farmers lack the concept of epidemic prevention, do not inject or inject vaccines or bacteria in time, and ignore the prevention of coccidiosis in summer and autumn.

5. Unfavorable management measures, such as dirty rabbit houses, moisture, and poor ventilation.

There are several ways to improve the survival rate of young rabbits:

1. The weight requirement of young rabbits at weaning. The speed of fattening depends largely on the speed of early weight gain. That is, it is closely related to the fattening period and the lactation period. All rabbits with large weaning weights gain weight faster during the fattening period and are more likely to resist the stress of weaning. The smaller the weaning weight, the more difficult it is to raise after weaning, and the slower the fattening weight gain. This requires improving the lactation ability of the mother rabbit, ensuring the supplementary feed for the young rabbits, and adjusting the weight of the young rabbits and the number of young rabbits the mother rabbit feeds.

2. Pay attention to feed problems. Many young rabbits develop digestive tract diseases after weaning, and the main reason is the feed. Because rabbits grow fast after weaning, but their digestive functions are not yet fully developed, a sharp contradiction is formed. Therefore, it is very important to prepare nutritious, easy to digest, and stress-preventing feed. Premix microecological preparations can be used to adjust the rabbit intestinal flora to reduce the stress response of young rabbits. The quality of feed raw materials must be strictly controlled, and attention must be paid to whether the feed raw materials are moldy.

3. Young rabbits are susceptible to infectious diseases, so we need to do a good job of epidemic prevention. Pay attention to daily disinfection, cleanliness and hygiene to reduce the occurrence of diseases. Onions, garlic and other medicinal plants can be added to the feed, which are good for disease prevention and growth promotion. At the same time, timely vaccination should not be ignored to ensure the safety of the rabbits.

4. Young rabbits have a habit of eating gluttonously, so the amount of food they eat must be limited. Feed them regularly, and reduce or increase the amount of food you feed them next time based on the amount of food left. Young rabbits grow fast and have a large appetite, so you must ensure they drink enough water every day.

The above are the factors that affect the survival rate of young rabbits and the methods to improve the survival rate of young rabbits. I hope it can be helpful to everyone! I wish all the young rabbits you raise can grow up healthily!

2. What are the factors that affect the survival rate of tadpoles during transportation?

The main factors that affect the survival rate of tadpoles are as follows: (1) Water temperature. Bullfrog embryos cannot tolerate low temperatures, but tadpoles can tolerate low temperatures and can survive even when the water temperature drops below 5 degrees, but they cannot adapt to high temperatures. The test results show that when the water temperature reaches 35 degrees, the tadpoles' activity decreases and their food intake decreases. At 37 degrees, there is mild mortality, at 39 degrees, there is severe mortality, and above 40 degrees, all tadpoles will die.

Therefore, during high temperatures, artificial cooling measures must be taken, such as setting up a shade shed above the pond, planting duckweed or water hyacinth in the pond, and frequently filling the pond with new water to regulate water quality and water temperature, which plays a good role in improving the survival rate of tadpoles. (2) Stocking density.

The stocking density of tadpoles of different sizes is different, especially the stocking density of early tadpoles (3-1.4 cm) has a significant impact on the survival rate. When the stocking density of early tadpoles exceeds 1000/m2, the survival rate is significantly reduced. When it reaches 2000 per square meter, the survival rate is only 18%.

(3) Water quality. There are many factors that affect the deterioration of water quality, the main one being the reduction of dissolved oxygen in the water, such as oxygen consumption by organic matter, pollution, and the respiration of biological organisms, including tadpoles, which consume oxygen and produce carbon dioxide. This is the direct cause of the deterioration of water quality. On June 12, 1983, we put 100 tadpoles, 10 days after decapping, into a glass tank filled with 1000 ml of water. Five days later, all of them died. Water quality analysis showed that the dissolved oxygen content was only 3.

8 mg/L (25 degrees). (4) Human disturbance. The survival rate of tadpoles in the original pond after hatching is significantly different from that in the pond transferred after human disturbance.

3. Briefly describe the water ecological factors that affect the overwintering survival of fish?

1. Poor physical condition of fish during the winter: Generally speaking, large-sized fish have good physical condition and high survival rate during the winter. Small-sized fish have poor physical condition and less nutrients such as fat accumulated in their bodies. It is difficult for them to maintain energy for survival during the long wintering period and they often die due to physical weakness. However, if the feed formula is unreasonable, the vitamin content is unbalanced or the amount of growth promoter added exceeds the standard, although it does not affect the growth of the species, it will seriously affect the physical condition of the fish and make the fish "fat". The immunity of such fish decreases and it is difficult to survive the winter. Especially in the late winter, they are susceptible to infection by pathogens, fish diseases break out, and wintering losses occur.

2. Hypoxia and low temperature in subglacial water:

(1) Snow is not cleared in time or the clearing area is too small, resulting in poor light transmittance, which affects the photosynthesis and oxygen production of phytoplankton.

(2) The water is thin and lacks fertilizer, the amount of phytoplankton is small, and the oxygen production is insufficient; the zooplankton reproduces in large numbers, and the oxygen carrying capacity increases.

(3) The bottom mud of old ponds is too thick and the high organic matter content causes hypoxia.

(4) Improper water injection or oxygenation. Blindly flushing water or adding oxygen for a long time will cause the water temperature in the pond to drop rapidly, and the turtles will be frozen to death.

3. Harmful substances exist in the wintering pool: Due to the increase in wintering density, harmful gases cannot escape after ice closure, and accumulate more and more in the water. Once the standard is exceeded for a long time, it will cause harm to the wintering fish. The most easily produced chemicals are ammonia nitrogen, nitrite, hydrogen sulfide and carbon dioxide.

4. Fish overwinter with diseases: Pathogens infected during the summer and autumn breeding stage are not treated in time, and the disease accumulates in the winter. The five species have poor physical fitness and poor ability to resist diseases and adverse environments, which increases the chance of infection with fish diseases and leads to fish disease outbreaks.

4. What is the difference between interference factors and influencing factors?

The difference is that interference factors are bad factors that have negative effects. Influencing factors include both positive factors and negative factors.

In the international standard classification, interfering factors and influencing factors are related to laboratory medicine.

In the Chinese standard classification, interference factors and influencing factors involve medical laboratory equipment and medicine. The time flexibility is different. The difference lies in the good or bad influencing factors.

5. What is the difference between influencing factors and limiting factors?

Not the same meaning.

Constraints are factors that act as a limit and have a more direct effect on the results.

Influencing factors are factors that have an indirect effect on the results, and their influence is not as great as that of restrictive factors.

Constraint: subject to environmental constraints. If the existence and change of thing A itself is conditional on the existence and change of thing B itself, then thing A is constrained by thing B, such as mutual constraints. In layman's terms, it means restriction and constraint.

Influence refers to affecting or changing something in an indirect or invisible way.

6. What factors affect melting?

Pressure is inversely proportional to the melting point. The greater the pressure, the lower the melting point. For example, when walking on the snow in winter, the snow will melt quickly under the pressure of stepping on it, and the melting temperature is below minus 5 degrees Celsius.

Generally speaking, impurities lower the melting and boiling points of a substance. For example, an alloy has a lower melting point than any of its constituent components.

The melting point of a substance is the temperature at which the solid and liquid states of a pure substance are in equilibrium under a certain pressure. In other words, at this pressure and melting point temperature, the chemical potential of the pure substance in solid state is equal to the chemical potential in liquid state. For a pure substance solid system (nanosystem) with extremely high dispersion, the surface part cannot be ignored, and its chemical potential is not only a function of temperature and pressure, but also related to the particle size of the solid particles. It is a first-order phase change process in thermodynamics.

7. What factors affect shaft sealing?

1. Control of shaft seal pressure

High shaft seal pressure can easily cause steam to escape from the seal, which can easily lead to water ingress into the oil and deteriorate the turbine oil quality. Excessive shaft seal pressure will cause the safety door of the pressure equalizing box to operate, wasting working fluid and damaging equipment. Excessive shaft seal pressure may cause the vacuum of the unit to drop, and cold air may enter the shaft seal or even the cylinder, causing the shaft seal section or the cylinder to be cold, which seriously threatens the safety of the equipment.

2. Impact of abnormal shaft seal temperature on the unit

When the shaft seal temperature is too high, especially before the unit is started, if the temperature is too high, the shaft end steam seal and the rotor steam seal section will be heated violently, resulting in local stress concentration, thereby causing certain deformation, which may change the gap between the rotor and the cylinder, increase the shaft seal steam leakage, increase the expansion difference, and seriously cause dynamic and static friction.

When the shaft seal temperature is too low, the shaft end steam seal and the rotor steam seal section will be cooled. Similarly, local stress concentration will occur, causing the gap between the cylinder and the rotor to change, increasing the shaft end leakage and reducing the expansion difference. When the shaft seal temperature is too low, the steam supply to the shaft seal may carry water, causing water hammer in the steam supply pipeline of the shaft seal. In severe cases, water will enter the turbine.

8. What factors affect housing prices?

Housing prices are a major issue that concerns the Chinese people at this moment. They are all paying close attention to the real issues and are looking forward to price reduction. Today, the editor will analyze the following aspects. The results are not optimistic. At least in the next 20 years, it is not optimistic. This is the editor's personal opinion and does not represent any official. Please pay attention to the official announcement for details.

1. This year - housing prices in first-tier cities will continue to rise. First-tier cities: Beijing, Shanghai, Guangzhou, Shenzhen. Housing prices in these cities will rise, which has been recognized by many experts. The increase will be huge, why? These big cities are all economic and political centers of a region, and their development speed has far exceeded that of surrounding cities. Therefore, residents in surrounding cities who have pre-purchased houses will not easily invest in houses, but will invest their money in first-tier cities. This is the main reason why housing prices in first-tier cities remain high.

2. Second-tier cities saw a slight increase in housing prices. Driven by the sharp increase in housing prices in first-tier cities: Tianjin, Hangzhou, Chongqing, Wuhan, Nanjing, Suzhou, Wuxi, Chengdu, Shenyang, Qingdao, Dalian, Ningbo, Quanzhou, Xiamen. Although housing prices in these cities will not rise sharply, there will be slight fluctuations in good locations. These cities are undoubtedly the centers of a region, and residents of surrounding cities will also invest their limited funds in these cities.

3. Third-tier cities, due to their relatively developed economies, are bound to attract the attention of suburban residents. Some provincial capitals or more developed coastal cities such as Jinan, Changsha, Zhengzhou, Shijiazhuang, Xi'an, Harbin, Changchun, Wenzhou, Foshan, and Dongguan. Don't underestimate the residents of the suburbs. Due to factors such as demolition and land occupation, these residents have money in their hands. The wealthy residents will definitely invest their money in urban real estate, so it will also drive up the housing prices in the city.

4. Fourth-tier cities are upgrading. Some cities are influenced by the rumor of the second political center, and they are bound to flock to it. Several cities adjacent to Beijing have seen a large number of people buying houses. Since many residents work in Beijing, buying houses in cities near Beijing has become a general trend. Therefore, many working people who cannot afford to buy houses in Beijing can only choose to buy houses here.

5. Airports and high-speed railways have influenced and driven up housing prices. This is the convenience of transportation. The convenience of transportation and travel will inevitably lead to a rise in local housing prices, and the increase is very large. These convenient transportation tools are also a big strategy for the whole country. With the continuous extension of high-speed railways, the Beijing-Northeast high-speed railway is about to open, which will inevitably drive up housing prices along the high-speed railway. This is also a situation that ordinary people do not want to see in order to achieve convenient travel. These cities are no longer listed one by one.

6. The liberalization of housing funds is undoubtedly one of the factors driving up housing prices. With the repeated reduction of loan interest rates, the liberalization of housing funds has provided civil servants working in government agencies with the opportunity to buy houses. Many civil servants still live in old houses. The liberalization of housing funds has brought these personnel the opportunity to improve their housing conditions. It is also an important factor in increasing the enthusiasm of civil servants to buy houses. Therefore, this is also one of the reasons why housing prices remain high.

9. What factors affect silver?

There is production, demand, currency strength, and the game between long and short markets.

10. What factors affect sound quality?

There are many factors that affect the sound quality of the audio system:

1. Audio source: ordinary audio sources such as MP3 have a bit rate of only 320Kbps, while general APE can be around 1000Kbps, and DTS/WAV can reach 1400Kbps or even higher.

2. Power supply. The power supply currently used in audio equipment is basically DC obtained after rectification and filtering of AC. It still has impurities such as harmonics, which cannot be compared with the DC power of the battery. The DC power of the battery has no external harmonics and is purer.

3. The pre- and post-amplifiers, the power pre-amplifier and post-amplifier are crucial. Many factors such as the amplifier circuit design, component selection, overall wiring, layout, etc. can directly affect the sound quality.

4. Speakers, highly sensitive speakers, and a well-designed cabinet are also very important. 5. Connecting wires, the connecting wires in each link are also very important.