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What should be the culture density of rainbow trout?
What should be the culture density of rainbow trout?

The breeding density is 1600 fish/㎡.

Matters needing attention in rainbow trout culture:

Rainbow trout has a flat body, a large mouth, an oblique crack and an end position. The kiss is round and blunt, and the upper jaw has fine teeth. The dorsal fin has a short base and a small lipid fin at the back. The pectoral fin is of medium size and slightly pointed at the end. The ventral fin is very small, away from the anal fin. Scales are small and round. The back and the top of the head are blue-green, yellow-green and brown, and the sides and abdomen are silvery white, white and grayish white. Black spots are irregularly distributed on the head, sides, back and fins.

Water is the premise of rainbow trout culture, and the water used for culture should be flowing cold water, the water temperature is below 22℃ all the year round, and it does not freeze in winter. The water quality should meet the water standard for fish farming, clear and pollution-free. This water source scheme includes mountain spring, mountain stream, underground water inflow, drainage at the bottom of reservoir, melting water of snow mountain, etc. ?

There should be a certain flow of water to raise trout. The number of fish that can usually be raised is calculated according to the current. Under normal circumstances, the yield of trout raised at the flow rate of 1 liter of water per second is about 50? 200 kilograms. The water running in the pool should have a certain flow, generally at 1.2? 1.8 m/min, the current velocity of cultured young fish is small, and the current velocity of cultured fish and parent fish is good.

The water quality of rainbow trout culture must be clear. If the suspended matter in the water falls on the gills, it may cause rainbow trout to have difficulty breathing. While ensuring clean water quality, we should control the pH value of pond water. The optimum pH range for rainbow trout growth is 6.5-6.9. With the continuous growth of rainbow trout, their adaptability to salinity in water will be enhanced. Young fish can survive and grow in water with salinity of 0.5-0.8%.

Rainbow trout is a cold-water fish, which is deeply loved by consumers because of its golden skin and tender meat. Rainbow trout like to move in groups, swim fast in the water and eat fiercely. Usually, groups of fish jump out of the water to compete for food. They have high requirements for water quality and water temperature. It is best to keep the water temperature of rainbow trout at about 7- 18℃. Too low or too high water temperature will lead to the death of rainbow trout.