One must pay attention to the weather conditions. The fall arrest must be carried out in the sunny days, the climate is cool, and the pond fish do not float before and after the dawn. At this time, the impact of the catch on the fish is small, and the caught fresh fish can be listed in time. Haze, sultry weather is not suitable to pull net fishing, so as not to cause a large number of dead fish. In addition, when fish floating heads or fish diseases occur in ponds, they should not be caught.
Second, to increase the consumption of oxygen after eating satiety-feeding fish, when caught in the net, they will be frightened to jump and flee, easily causing casualties. Therefore, it is necessary to stop feeding or reduce the amount of feed before the day of catching the net, and do not give a large amount of concentrate to increase the weight of the listed fresh fish. Otherwise, the result will not be worth the loss. In addition, the leftovers in the pond and the debris floating on the surface of the pond should be eliminated one or two days before the arrest.
Third, we need to grasp the method of catching and catching. For ponds with larger areas and denser fish deposits, it is not appropriate to catch them in the whole pool. It is advisable to catch half pools or 1/3 pools. Due to the high water temperature, the fish activity is high and the oxygen consumption is high. When there are too many fishes in the fence, it is easy to cause injury and dead fish. After catching the net, the small fish that has not yet reached the product specifications should be quickly and swiftly put back into the original pool and the listed large fish should be picked up to prevent the small fish from being damaged or suffocated by being squeezed.
Fourth, after the post-catching management is started, the fish in the pond will be intensified, the oxygen consumption will increase, and the silt residue in the bottom of the tank will be agitated during the catching process. The bottom of the organic matter will turn up and make the water in the pond. The rapid decrease of dissolved oxygen can easily cause the fish to lose oxygen. Therefore, after catching, timely infuse new water or turn on aerator to increase oxygen. At the same time, whole ponds should be sprinkled with lime slurry for sterilization to improve and regulate water quality.
Second, to increase the consumption of oxygen after eating satiety-feeding fish, when caught in the net, they will be frightened to jump and flee, easily causing casualties. Therefore, it is necessary to stop feeding or reduce the amount of feed before the day of catching the net, and do not give a large amount of concentrate to increase the weight of the listed fresh fish. Otherwise, the result will not be worth the loss. In addition, the leftovers in the pond and the debris floating on the surface of the pond should be eliminated one or two days before the arrest.
Third, we need to grasp the method of catching and catching. For ponds with larger areas and denser fish deposits, it is not appropriate to catch them in the whole pool. It is advisable to catch half pools or 1/3 pools. Due to the high water temperature, the fish activity is high and the oxygen consumption is high. When there are too many fishes in the fence, it is easy to cause injury and dead fish. After catching the net, the small fish that has not yet reached the product specifications should be quickly and swiftly put back into the original pool and the listed large fish should be picked up to prevent the small fish from being damaged or suffocated by being squeezed.
Fourth, after the post-catching management is started, the fish in the pond will be intensified, the oxygen consumption will increase, and the silt residue in the bottom of the tank will be agitated during the catching process. The bottom of the organic matter will turn up and make the water in the pond. The rapid decrease of dissolved oxygen can easily cause the fish to lose oxygen. Therefore, after catching, timely infuse new water or turn on aerator to increase oxygen. At the same time, whole ponds should be sprinkled with lime slurry for sterilization to improve and regulate water quality.
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