As winter fish?
Winter fish are transferred in different ways. In winter, the fish reduced all life processes, almost all fish, with rare exceptions, stop feeding. They have slowed down the growth process and metabolism. In winter time, the existence of fish at the expense of accumulated fat in the summer.
Many species of fish that love warm water during cold weather, they overwinter in the pits on the bottom of the pond. These include carp, tench, bream. In these pits they are in close quarters all winter long. They are so densely stuffed for the winter, some fish that first took winter quarters, under the weight of the upper neighbors are formed bedsores on his stomach. Come in pits for the winter fish of the same species, and even the same age. Small pits accumulate exactly the same fish. Ichthyologists explain the fact that during hibernation the metabolism in the body slows down and fishes it is better for the winter, when holes accumulate in fish of the same type, age. Soma does not overwinter in the pits, they find a place near the pits. This is because in the pit in winter, very little oxygen, and catfish don’t like it.
As winter predatory fish
Predatory fish in wintering pits are not settled, but those winters, don’t bother. It would seem that a lot of eating – eat yourself to health. However, it is not. Predatory fish such as pike, Zander and perch find their prey where the sail roach, perch, ruff, bleak. These fish do not stop for the winter, even when the pond is already covered by a shell of ice. Under the layer of ice in the water creates the shadows, which helps predatory fish in hunting for others.
The only one who perfectly brings the winter is the burbot. For him, the winter is a good time because he can not tolerate warm water. When the water is heated to a temperature of 15-16 degrees, burbot hides in the depths of water in burrows under the driftwood. And at a water temperature of more than +25 degrees just dies.
Some fish at the onset of the cold season move to warmer water. For example, anchovy migrates from the Azov sea to the Black sea, where it winters at a depth of 100-150 m. the Caspian herring also wanders into southern waters.
In the Arctic there are small lakes and ponds, in which water is frozen to the bottom, but the inhabitants of these bodies of water common carp and Dalley, is not threatened by death. Even if they are frozen into the ice, in spring they thaw and are doing, having time in the short Arctic summer to spawn, and the grown offspring perfectly again wintering in the ice.
But in the Equatorial waters of the fish have problems not from cold, but from heat and drought. It is in our winter months. They can dig in the mud and go to sleep, so waiting out the heat and lack of oxygen.
There is such fish – tsiprinodon macularis that can withstand water temperature is 52 degrees. She lives in California hot springs.