Introduce three methods of catching "hot water fish"

I. net-pulling method

This is a common fishing method to catch "hot water fish" at present. The net generally uses nylon net or the middle part uses nylon net, which requires that the length of the net is about 1.5 times the width of the pool, and the height of the net is about 2 times the depth of the pond. The advantages of this fishing method are as follows: first, there are a wide range of fish in the pond, which can meet the requirements of different fishmongers; second, in the process of pulling the net, the sediment and pond water are stirred, which plays the role of fertilizer and aeration. Of course, this fishing method also has obvious shortcomings: first, the process of pulling the net to divide the fish is too long, which will inevitably bring several adverse consequences: first, the labor intensity is too high, and at least 10 people are needed to complete a net-pulling operation; secondly, the fish is easy to be injured, which leads to the occurrence of fish disease; in addition, the phenomenon of anoxic fish death may occur due to too long time in the fish division operation. Second, the starting rate of some fish is not high, especially in the season of high temperature and full water, the starting rate of common carp, crucian carp and grass carp is very low, so it is generally believed that the net method pays more attention to the fishing of upper-layer fish. it is more suitable for "fat water fish" culture ponds with silver carp and bighead carp as the main fish.

Now, in view of the problems existing in the process of pulling the net, people have introduced two improvement methods: one is to use large mesh gear to pull the net, which is determined according to the specifications of fishing, and the fish that do not reach the specifications on the market are basically filtered out of the mesh and do not know how to surf the Internet, thus shortening the operation time and avoiding the occurrence of hypoxia. This method is also inevitable for fish body injuries, especially herring and grass carp between fish species and adult fish are often prone to hang nets, these net fish are generally Gill injuries, basically can not survive, barely @ # @ 136 fish @ economic value is also very poor. The second is to adopt the fish-collecting purse seine method, that is, 2 to 3 hours before pulling the net, the pond is filled with fresh water, so that most fish in the pond are concentrated in the new water area. At this time, the fishing work can be completed only by putting the net around the water corner of the pond, thus greatly shortening the net pulling time. Because it is working in the new water area, it will not cause anoxic fish to die. However, this method is only suitable for use when there is less water in the early stage, when the stimulation response of the pond fish to the new water is obvious, and the purse seine effect is very good. In the midsummer season when the water is full, the stimulation response of the pond fish to the new water is not strong, and often can not get a very good effect.

Second, the method of moving.

This is a "hot water fish" fishing method that began to be promoted after the use of compound feed, and the specification for the use of fish is 16 meters × 16 meters. The specific method is: first put the net at the bottom of the feeding area, feed with a feeding machine, so that the fish are concentrated on the noodles, and then move the fish to catch fish. The advantage of this fishing method is that it is easy to operate, greatly shortens the operation time, and the whole process takes only about 40 minutes, thus reducing the damage to the fish body; in addition, under normal weather conditions, this method has a very high starting rate of eating fish. Generally, at least 60% and 70% of the eating fish can be moved to the fish, which is especially suitable for the breeding requirements of catching large and small fish. Of course, this method also has its disadvantages: first, there are restrictions on the starting target, it is only effective for eating fish, and the initial catch for silver carp is almost zero; secondly, it is obviously affected by climate, because the schools of fish are concentrated through feeding, therefore, in the early morning of very hot or rainy days, it is often unable to achieve the purpose of gathering fish because of lack of oxygen. Third, there are higher requirements for the depth of the pond water. In ponds with a water depth of less than 1.5 meters, schools of fish are often unable to concentrate on feeding due to the influence of the net at the bottom of the pond, so that the fishing work cannot be completed; fourth, the pre-preparation time is longer, and in order to achieve the ideal starting effect, the fishing net should be placed at the bottom of the feeding area 1-2 days in advance so that the fish can adapt.

Third, cast a net

"casting net" is a kind of fishing gear commonly used in the past, which can be completed by a person standing on a boat or casting a net into the water. Each time the net is cast, it takes about 5 square minutes, and the fishing area depends on the level of the operator, generally about 20 square meters. The biggest advantage of this method is to save manpower, generally only 2 people can operate, and this method catches a full range of fish. Its biggest disadvantage is that it is not conducive to large-scale fishing, generally, a maximum of 100 kg to 150 kg can only be caught at a time; secondly, the fish caught by this method can only be completed on board or on shore, which is very damaging to the species in the pond; thirdly, this operation is highly technical and often has to be done by special personnel. Therefore, the promotion value of this method has become smaller and smaller. Through the above analysis, we can determine the fishing method according to our actual needs. The ponds dominated by fat-water fish should start fishing by pulling nets, and it is generally better to move fish in ponds dominated by compound feed culture, while casting nets is also a feasible and practical way for some small adult fish ponds or fishing ponds dominated by entertainment and leisure.