Crabs are warm animals, and their body temperature mainly depends on the ambient water temperature. Usually, the body temperature of crabs is slightly higher than the surrounding environment. Water temperature will affect the growth and metamorphosis of river crabs. Under suitable temperature conditions, the temperature is high and will not freeze to death.

When the water temperature is about 65438 05℃, the metamorphosis of crabs is very slow. Generally, the food intake starts obviously when the water temperature is 10℃, and the food intake capacity decreases when it is lower than 10℃. Eriocheir sinensis can tolerate low temperature. When the water temperature is-1 ~-2℃, the crab with eggs can survive the winter smoothly, and neither eggs nor crabs will die. In winter, river crabs stop eating and hide in caves for the winter.

In addition, animal bait should be fed in time according to the temperature change and the growth of river crabs, so as not to start meat too early and delay the opportunity. It is easy to precocious puberty too early. Some crabs were very small after the last molting, and even a few died in 10. At the same time, too high temperature will make the water quality worse, affect the normal growth and induce diseases.

Extended data:

Crabs have the characteristics of reproduction and migration. Sexually mature females must shed their shells once after going into the sea and before mating and spawning. You can't mate with a male crab until you molt. After mating, the shell of the female crab gradually hardens and is ready to lay eggs.

They rely on the mother crab to give birth to small crabs, and every time the mother crab will lay a large number of eggs, the number can reach more than one million. After these eggs hatch in the abdomen of the mother crab, the larvae can leave the mother and float around with the coastal current.

Crabs only lay eggs once in their lives, and all the eggs are attached to their abdominal limbs. In the late spring or early summer of the following year, the females migrate to the estuary and the eggs hatch. At this time, they are all getting old and will die soon, and they haven't even had time to see their children.

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