1 adult fish culture
1. 1 fish pond construction Tarzan red scale fish is a kind of fish that lives in clean water. It has extremely strict requirements on water quality and needs to be purified with water with high dissolved oxygen. So the fish pond must be a cement or stone pond with an area of about 10 square meter, because it is too big to catch fish. The depth cannot exceed 70 cm. Of course, the running water fish pond can be enlarged appropriately, and some smooth stones are piled inside, and gaps are set to simulate the living environment in its natural state, and the effect is better.
1.2 water for fish farming The red scale fish farm should be built near a stream with running water in the depths of Mount Tai, using pipelines and directly using natural water. If tap water is used instead, it must be dried for about 7 days before fish can be raised in the pool.
1.3 stocking density pond culture mainly depends on photosynthesis of phytoplankton in water to meet oxygen demand. However, due to the special requirements of red scale fish for water quality, there should not be too many phytoplankton in the pool water, and only some green algae are left on the stone wall, which greatly limits its stocking density. The stocking density of fish in still water should not exceed 0.5 kg/m2, but it can be adjusted according to the season and water temperature to ensure that the floating head phenomenon is basically not seen. Running water fish culture can increase stocking density according to factors such as water quantity. In addition, the high stocking density and easy deterioration of water quality are important reasons for limiting its stocking density.
1.4 Most wild red scale fish feed on aquatic insects and its larvae. A chironomid larva and a mayfly larva in Shirakawa Valley live in Taishan Creek all the year round and are its main food. In artificial breeding, live fish worms (including cladocera, cladocera and chironomid larvae, etc. ), supplemented by artificial compound feed, the culture effect is good. The formula of artificial compound feed is: imported fish meal 44.7%, high-quality soybean meal 22.9%, corn flour 29.4%, amino acid fortified nutrient 3%, vitamin additive 0.03% and trace element additive 0.05%.
1.5 Fish Pond Management If the management is strengthened, it will play a very important role in increasing stocking density, improving water quality and increasing fish yield.
Shading and sun protection Red-scale fish live in mountain streams for many years and are extremely intolerant of high temperature, and will die above 28℃. Therefore, it is necessary to prevent the pool water from overheating in midsummer. You can put an iron frame and bamboo curtain above the fish pond, which has good effect, but the cost is high. You can plant trees next to the fish pond for shade, and the effect is quite good. In the summer afternoon, due to the rising water temperature and enhanced illumination, the bait and fish in the pond ferment rapidly, and bubbles are generated to adhere to them, so that some of them float to the water surface. In addition, trees shed leaves, causing clouds of dirt to float on the water. Therefore, every afternoon, they should be fished up with closed-eye silk screen to keep the water clean. Pay attention to water quality and fish activities at the same time.
Keep the water quality in the running water of fish farming, because new water is constantly injected, the water quality can always be kept clean. This is a very complicated task for red-scale fish in still water, because red-scale fish are very sensitive to water quality. If the transparency of the pool water is less than 1m, it will cause "tail burn" or even death. Therefore, carefully observe the pool water every day and replenish fresh water frequently. If the water in the pond is seriously damaged, the measures of "dumping the pond" (adjusting the pond) must be taken. The work of "dumping the pond" was completed in the early hours of the morning, because the temperature was low at this time, the fish were easily hooked, and there were fewer injuries, and the temperature difference between the two ponds was also small.
Feed live fish and worms in the morning, and the feeding amount can generally ensure that the fish are full and no longer feed in groups in the pool; In the afternoon, put the compound feed 1 time, the amount should be small, to ensure that all the fish can be eaten, and there is no surplus. Feeding red scale fish should be relatively concentrated, and it is not allowed to spread all over the pond, because when it is feeding time for red scale fish, as long as people stand by the pond, all the fish will gather at your feet, and there will be no phenomenon that individual fish can't eat bait when feeding in a concentrated way, so as to avoid wasting feed and polluting water quality.