How do fish spend the winter?

In the cold winter, animals that can hibernate will hibernate in warm caves, while animals that cannot hibernate will move south to warm places to spend the winter. Especially when winter comes in the north, it is almost a state that "silent birds in thousands of mountains have disappeared, and thousands of paths have lost track of people". So how does an animal like fish spend the winter?

First, how do fish spend the winter

If fish live in the wild, most of them will not hibernate, they will sink to warm places under the water to live, and reduce the amount of activity. On the other hand, fish cultured in ponds need to take relevant technical measures to survive the low temperature season safely, such as overwintering in water, overwintering in running water, overwintering in cages and overwintering indoors.

On the other hand, the ornamental fish cultured indoors generally adopt measures such as changing the feeding time and adjusting the water temperature to overwinter.

In the warm climate areas of the south, the fish living in the wild do not need to carry out related overwintering activities, while in the colder areas in the north, the temperature of the lower water body is higher due to the hot shrinkage and cold expansion of the water body, and the fish will gather here. Only when the weather is fine will it float to the surface.

When artificial farmed fish are overwintering, they should ensure that the unfrozen water layer of the overwintering pond is more than 1-1.5 meters, at the same time, the bottom of the pond should be flat, and the thickness of silt should be about 10 cm, because the silt contains a lot of humus, although it can provide fertilizer, protect fertilizer and regulate water quality, in addition, it is necessary to disinfect the fish before overwintering so as not to cause diseases. Among them, stop water overwintering is to put farmed fish in small still water bodies such as ponds with suitable conditions for overwintering, which is generally used in areas where there is a lack of running water conditions. Water overwintering is the use of water with suitable temperature and rich dissolved oxygen to continuously inject and discharge the overwintering water of fish, so as to make the fish survive the winter safely. The cage overwintering chooses the reservoir or lake with sufficient dissolved oxygen and suitable water temperature to place the cage, so that the fish can survive the winter in the underwater cage. Indoor overwintering in the fish pond to build a plastic film greenhouse or glass greenhouse to keep warm and use the sun to heat up, so that the fish can survive the winter safely.

When indoor farmed tropical ornamental fish are overwintering, they should first change the feeding time, generally around 10: 00 in the morning, when the difference between water temperature and air temperature is relatively small, and the impact on ornamental fish is relatively small. Secondly, attention should be paid to the change of water temperature. Heating rods should be used in time when the water temperature is too low, so as to create a good living environment for ornamental fish.

2. Basic information of fish

Fish is divided into chondrofishes and bony fishes in the animal kingdom, and it is one of the most widely distributed species in the world. There are 24618 species of living fish in the world, and the number of new species is increasing at an average rate of 150 species per year. Fish are mainly divided into tropical fish, temperate fish and cold zone fish, and there are many species under them.

There is an inextricable relationship between fish and human beings. as early as the early days of primitive humans, fish was one of the main sources of protein. Erya in the early Han Dynasty in China has divided animals into four categories: insects, fish, birds and animals, which shows that human beings have a long understanding of fish. Regular consumption of fish can play a role in tonifying the brain, protecting the heart and reducing fat and replenishing calcium efficiently.

The above is some basic knowledge about fish, in the overwintering of fish, or according to the specific situation of specific analysis, different fish on the living environment requirements are not the same.