CATDOLL : CATDOLL: What is the farming environment like for salmon?

What is the farming environment for salmon?

Under natural conditions, salmon like to live in clear, unpolluted waters. The extreme temperatures for their survival are 0℃ and 30℃, and the optimum temperature for their growth is 16～18℃. They eat vigorously and grow rapidly within the suitable temperature range. When the temperature is below 8℃ or above 20℃, their appetite decreases and their growth slows down. They are fish that like to swim against the current and like oxygen. Abundant water and the stimulation of water flow can maintain good material metabolism of salmon and promote their growth.

Therefore, salmon farming mostly adopts flow-through farming, and the appropriate water flow rate is 2-30cm/s. It has high requirements for dissolved oxygen in water, and its appropriate dissolved oxygen content is above 6mg/L. The most suitable pH range is 6.5-6.8. It likes clear, transparent, pollution-free water bodies and is a euryhaline fish that can live in seawater and grow in fresh water. Under artificial breeding conditions, it has gradually turned to omnivorous, can eat artificially formulated granular feed well, and can be intensively domesticated.

Although there are many types of salmon, the current scale of aquaculture is small and has just started. They can spawn naturally under pond conditions and generally reach sexual maturity in 2 to 3 years. The spawning water temperature is below 15°C, the suitable water temperature is 4 to 13°C, and the optimal water temperature is 10 to 11°C. The spawning period in Beijing and Shanxi is from December to February of the following year; in Heilongjiang, it is from March to May. In the natural environment, mature salmon often choose rivers with clear water, currents, and gravel bottoms as spawning sites. Generally, they can spawn multiple times, with each spawning amount of about 2,000 to 3,000 eggs. The eggs are round and sink.