Winter is not only a favorable time for fish to catch and market but also a latent factor that aggravates fish diseases and then induces the occurrence and prevalence of fish diseases in the following year. Therefore, when fishing in winter, we must grasp the fishing essentials, operate with caution, minimize fish injuries and prevent fish diseases.
Clean up water before fishing
Before fishing, clean the pond and remove any obstacles such as branches, stumps, stones, etc. from the bottom of the water. Floating objects such as grass on the water surface and obstacles around the pond should also be removed to facilitate the operation of the net and not harm the fish.
Release water before catching Water filling after catching
In winter, the water in the pond is deep, and part of the water should be drained before fishing. Because if a part of the water is not released before fishing, the water is too deep, which is not conducive to the operation of the net, and it is easy for the fish to escape and bruise during the fishing process. Therefore, before fishing in winter, the water level in the pond should be lowered to about 1.5 meters, and then normal fishing should be carried out. After fishing, the water level should be raised in time to improve the water temperature in the pond and ensure the safe wintering of fish in the pond.
Go down the net lightly, get up the net fast
Before fishing in winter, the net should be tidy up and put in a suitable place on the side of the pond. Then put the bottom of the net, the net clothes and the floating net into the water gently along the ridge in turn, and then pull the net from both sides of the pond at the same time. In the process of pulling the net, in the first half of the water surface of the pond, it is necessary to move forward slowly to avoid the collision and injury caused by the fish jumping. When the net is drawn to the second half of the pond, the net should be retracted and raised quickly to minimize the time the fish touch the net and the number of escapes.
Try not to keep fishing
Due to the low water temperature in winter, the metabolism of the fish body is slow and the ability to resist diseases decreases. If fish are continuously injured in a short period of time due to continuous fishing every day, not only will the wounds of the fish be difficult to heal, but also pathogens such as saprolegnia will take advantage of the situation, resulting in a large number of fish diseases and even outbreaks of fish diseases. Therefore, winter fishing is generally appropriate to fish every 3 to 5 days.
Disinfect ponds after fishing
Disinfect the entire pond after each harvest period. The disinfection method is: after deepening the water level first, use 30-50 kg of quicklime per acre to hydrate the pond evenly and then sprinkle it on the pond.