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What is the relationship between the farming of the four major fish and weather conditions?
Fish live in water, but it is also closely related to weather conditions. Temperature fish is a temperature-changing animal. The water body temperature is body temperature. The temperature of the water directly affects the metabolic activity of life. The appropriate temperature range is 10 to 33 degrees Celsius, the optimum temperature is 25 to 30 degrees Celsius, and dormancy starts at 10 degrees Celsius and starts at 10 to 15 degrees Celsius. , Slow growth, 15-20 degrees Celsius, increased appetite, rapid growth, 20-30 degrees Celsius fastest growth, 30 degrees Celsius growth and slower, so the amount of feed should pay attention to changes in temperature, the temperature is also related to the amount of dissolved oxygen in water . The temperature has a close relationship with the oyster production, spawning, hatching of eggs, growth and transportation of fry. Water temperature 18 to 30 degrees Celsius, continuous sunny production, fecundity, fertility rate, hatching rate are high, 8 degrees Celsius below the fish to stop eating, poor appetite above 30 degrees Celsius, 16 degrees Celsius below the hatch rate is low, above 31 degrees Celsius mortality High, 8 to 10 degrees Celsius fish consume less oxygen, suitable for transportation. Mutation of temperature, the fish is prone to death, especially when fry stocking, pay attention to the difference in water temperature. Illuminating fish, like other animals, needs a sufficient supply of oxygen, and an important source of oxygen in the water is the oxygen released from the photosynthesis of phytoplankton in the water. When other organisms and bacteria in the water decompose organic matter, they also consume oxygen. Therefore, shade is serious, or long-term rain, poor light will affect the content of oxygen in the water, affecting the growth of fish. Without light, the production of water plants is affected, and the food supply of fish is also a problem. The oxygen in the air can also be directly dissolved into water, but the amount is not large. When there is a storm, the oxygen dissolved in water is more than 100 times faster than in still water. When the temperature is high, the amount of dissolved oxygen decreases, and the decomposing effect is strong, which increases the consumption of oxygen. Therefore, oxygen is more likely to be depleted at high temperatures, resulting in floating heads. When the air pressure is low, oxygen dissolved in the water is also reduced, the air pressure is low, and the temperature is high on cloudy days, and oxygen deficiency is most likely to occur. It is noteworthy.