The small-scale net enclosure of fish in river-type waters does not affect the waterway, but also makes full use of the water resources. It has the advantages of less investment, high yield, and easy fishing. ?
I. Selection of water areas The area surrounding the network should be chosen where the water surface is large, the river bottom is flat, the water flow is gentle, and the average water depth is more than 1.5 meters per year. However, the water inlet and outlet and the fairway must be avoided. ?
Second, the setting of network perimeter should generally be set along the coast. Rectangular mesh perimeter, length to width ratio of 2:1, with an area of ​​6000 ~ 7000 square meters is appropriate. The net enclosure is composed of two wall nets. The internal wall net should be equipped with double stone dragons. The main stone dragon and the vice stone dragon should be separated by 0.8 to 1 m. The vice stone dragon should tile the bottom of the net enclosure and step into the mud. At the same time, set up the food table between the two walls and place a small amount of pellet feed or install a sac net to see if there is a fish swimming to the food table to judge whether there is any fish escape. If the stocking densities in the nets are high, the nets can be divided into several grids to reduce the pressure on the nets when the fishes crowd to one side, and at the same time, the fish nets can also be prevented from escaping.
Third, the fish stocking According to the local swing outside the water more lean, large volume of water exchange and aquatic plants and benthic organisms are rich in characteristics, generally should be stocking grass carp, carp-based, with oysters, clams, oysters, clams and herring. In order to ensure that stocked species can meet market specifications, the specifications for fish species are: 250-500 g per grass carp, 50 to 100 g per carp, 100 to 300 g per carp and carp per carp, 100 to 100 per carp 150 grams, 100 grams per end of eel. The stocking ratio of each species of fish is: 40% to 50% of grass carp, 20% to 30% of carp, 10% to 15% of carp and carp, 10% to 15% of carp and carp, and a small amount of herring. Nesting 2nd-instar fish species. Fish species are generally stocked before the Spring Festival. ?
Fourth, feed feeding takes the form of two fine and medium blue feeds. The concentrate feed is mainly fed with pellet feed and barley, and green feed can be selected from duckweed. Concentrates are fed once a day in the morning and in the afternoon. Barley was soaked in water for 5 to 10 hours before feeding and 1% to 2% salt was added. When feeding, the feed was mainly placed on a flat, hard-bottomed shoal in addition to the cast in the entire net enclosure. Generally, it is possible to feed green feed at 8 to 9 am and then feed the concentrate. The amount of concentrate feed should be within 1 hour, and the green feed should be based on the same day. The specific feeding amount should be adjusted according to the weather and fish feeding conditions on the day. Feeding volume from July to September should account for about 65% of the annual feed volume. November will be listed for fishing. ?
In addition, we must always check whether the nets are damaged in order to prevent fish from escaping.
I. Selection of water areas The area surrounding the network should be chosen where the water surface is large, the river bottom is flat, the water flow is gentle, and the average water depth is more than 1.5 meters per year. However, the water inlet and outlet and the fairway must be avoided. ?
Second, the setting of network perimeter should generally be set along the coast. Rectangular mesh perimeter, length to width ratio of 2:1, with an area of ​​6000 ~ 7000 square meters is appropriate. The net enclosure is composed of two wall nets. The internal wall net should be equipped with double stone dragons. The main stone dragon and the vice stone dragon should be separated by 0.8 to 1 m. The vice stone dragon should tile the bottom of the net enclosure and step into the mud. At the same time, set up the food table between the two walls and place a small amount of pellet feed or install a sac net to see if there is a fish swimming to the food table to judge whether there is any fish escape. If the stocking densities in the nets are high, the nets can be divided into several grids to reduce the pressure on the nets when the fishes crowd to one side, and at the same time, the fish nets can also be prevented from escaping.
Third, the fish stocking According to the local swing outside the water more lean, large volume of water exchange and aquatic plants and benthic organisms are rich in characteristics, generally should be stocking grass carp, carp-based, with oysters, clams, oysters, clams and herring. In order to ensure that stocked species can meet market specifications, the specifications for fish species are: 250-500 g per grass carp, 50 to 100 g per carp, 100 to 300 g per carp and carp per carp, 100 to 100 per carp 150 grams, 100 grams per end of eel. The stocking ratio of each species of fish is: 40% to 50% of grass carp, 20% to 30% of carp, 10% to 15% of carp and carp, 10% to 15% of carp and carp, and a small amount of herring. Nesting 2nd-instar fish species. Fish species are generally stocked before the Spring Festival. ?
Fourth, feed feeding takes the form of two fine and medium blue feeds. The concentrate feed is mainly fed with pellet feed and barley, and green feed can be selected from duckweed. Concentrates are fed once a day in the morning and in the afternoon. Barley was soaked in water for 5 to 10 hours before feeding and 1% to 2% salt was added. When feeding, the feed was mainly placed on a flat, hard-bottomed shoal in addition to the cast in the entire net enclosure. Generally, it is possible to feed green feed at 8 to 9 am and then feed the concentrate. The amount of concentrate feed should be within 1 hour, and the green feed should be based on the same day. The specific feeding amount should be adjusted according to the weather and fish feeding conditions on the day. Feeding volume from July to September should account for about 65% of the annual feed volume. November will be listed for fishing. ?
In addition, we must always check whether the nets are damaged in order to prevent fish from escaping.
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