In the whole process of aquaculture, pond management before wintering is very important and critical, but in the breeding process, many farmers do not pay much attention to the pond management before wintering, believing that the winter fish activity is reduced, the amount of feed is small, the metabolism is slow, the growth is slow, etc., and they do not pay attention to the management of fish before wintering. In fact, the above various reasons will lead to poor physical fitness of fish during the wintering, easy to fall ill and even lead to death, so it is very important to do a good job in pond management before wintering.
Pre-winter management is mainly to manage the pond left in the adult fish or freshly stocked fish species, in the upcoming winter, fish fingerlings are prone to frostbite, water mold, lack of oxygen, pond and other diseases, seriously affecting the health of fish and later growth.
Doing a good job in the management before wintering and improving the success rate of fish overwintering is directly related to the actual production problems such as the growth rate, disease resistance and feed feeding cost of fish farming after wintering. Therefore, the pre-winter management of fingerlings will become a very important part of the aquaculture production process in the coming year after the end of the wintering.
Do a good job in the following three aspects to improve the success rate of fish overwintering!
1. Scientific and reasonable feeding, regular mixing and internal administration of chivalrous gallbladder increases the resistance and immunity of the fish.
Many farmers stop feeding after winter and do not start feeding until after spring. In fact, reasonable feeding feed before wintering increases the weight of the fish, does not lose fat during the wintering period, and increases cold resistance. In particular, some high-protein feed is fed to prevent the deterioration of the physique of the overwintering fish.
2. Strengthen the bottom before wintering, and regularly use organic matter such as bait and feces to degrade Qingqing.
Under normal circumstances, the water quality of the pond in winter is not fat, and some ponds are even very turbid, so the oxygen production capacity of such ponds is poor, the water quality is stable, and the thermal insulation effect is poor. The water level is properly deepened, and the water temperature drops slowly, thereby reducing the stress on the fish body. After deepening the water level, the bottom water is warmer, which can give the fish a safe winter environment.
3. Careful operation to reduce mechanical damage, regular sprinkling of water to prevent water mold infection
Winter is also the peak period of fish, once the operation of the net is improper, it is easy to cause the remaining fish to scratch, abrasions, etc., so in this case, it is easy to infect with water mold, water mold disease is not easy to break out in the case of low water temperature, once it is easy to break out after the spring. Therefore, before the net is pulled out of the fish, the splash race has a fish liquid peptide beauty to increase the anti-stress ability of the fish body, reduce damage, pay attention to disinfection work before and after pulling the net, and regularly sprinkle water to prevent water mold infection.
Therefore, before wintering, it is recommended to do a good job in the wintering management of the pond according to the above methods, otherwise it is easy to break out of fish plague in the next year, which will have a great impact on aquaculture.