First, the basic conditions of the pond The suitable salinity range for sea bream and prawns is 18-28. In this range, the lower the salinity, the better the growth. Therefore, it is best to choose non-polluting aquaculture ponds with low salinity and freshwater injection. The aquaculture area of ​​50-100 mu is more appropriate, the water depth is 1.5-2 meters, and the steeper the bank slope is, the better the perimeter of the pond is. Set the fence to 0.5 meters away from the bank, clear the surrounding debris of the pond, the benefits of the high standard pond: First, it can reduce the surface wear or death caused by the landing of the sea otters; When the second storm is large and the light is too strong, the jellyfish have to dive, and the greater the individual's dive is, the deeper the dive is. If the water is shallow, the jellyfish will forcibly submerge, causing the jellyfish body to wear out. The third water level deepens, the water temperature in the bottom of the pond is relatively stable, the sea otters can avoid the sudden temperature drop in spring and the high temperature in summer, and the deeper the pond is, the bigger the sea otters grow. Therefore, the high standard of culture ponds is the most basic condition for stable production and high yield of sea bream and shrimp. Second, the appropriate time for seedlings and reasonable seedling density For polyculture between sea bream and shrimp, the following two factors must be considered before releasing: First, the water quality index of the rearing pond must be the same as or similar to the water quality index of the seedling larvae and the shrimp seedlings; the second is that the prawn seedlings can be as long as 3 cm. Stocking seabream seedlings, because jellyfish can feed shrimp seedlings below 3 cm. The best time to lay seedlings in western Liaoning is in mid-May, and the time for sea larvae to hatch is appropriate in mid-June. The time for planting seedlings in Jiangsu and Zhejiang can be appropriately advanced. According to the experience of breeding in the area for several years, the specifications of shrimps in the polyculture of sea bream and shrimp are required to be 1 cm or more, the seedling density is 8000-10000 tails/mu, and the sea lice seedlings are raised to more than 4 cm with a density of 100-200. /mu. Third, the middle of the jellyfish seedlings The jellyfish plants purchased from the nursery factory mostly have an umbrella diameter of 1 cm or more, and the individuals are relatively small. The direct stocking effect is not satisfactory. It is therefore recommended that the seedlings be raised in the middle. The purpose of holding is to raise the survival rate, and secondly, to speed up the growth of the young. Holding methods include cement pool holding, cage holding and earth holding, etc. It is more economical and practical to hold the fence directly in the rearing pond and hold 200-300 densities per meter, when the seedling grows to 4 - 5 cm, remove the fence to breed. Fourth, feed the bait In the early breeding period, the bait in the pond is rich in organisms, so the bait is not fed after bait is released. When the shrimp is 3-5 cm in length, the bait is fed according to the number of bait organisms in the pond and the gastrointestinal fullness of the shrimp. The amount of feed was adjusted according to shrimp seedlings specifications, reservoir volume, and weather conditions. There are many kinds of bait, mainly clams such as cocklepods, cladocera, and amphipoda in the water, and their food intake is large. In the early stage, due to the small individuals, the input of bait and the feed organisms in the fertility tank can meet the demand of the sea bream, but in the middle and late period, with the increase of the individual sea otters, feeding is very necessary. There are three sources of bait: First, feed organisms in the breeding ponds through fertilizers; The second is the feeding of live food: such as Artemia larvae, copepods, branches, etc.; The third method is to feed the grits in the case where the density of the sea bream is large, but this method must be followed along the pond to feed the sea bream and follow the principle of less work. V. Water Quality Management The method of adding water in the early stage of polyculture of shrimp and shrimp is to add 10%-15% of water each time. Later, as the individual's growth gradually increase the amount of water, the principle of changing the water must be changed little, change frequently, and try to avoid large-scale irrigation, in order to maintain a good growth environment for cockroaches and shrimp. During the whole culture period, the water salinity was kept between 18-28, the pH was 7.5-8.5, and the transparency was controlled at 30-50 cm. In addition, changes in water quality in the natural sea area must be mastered before each change of water, and changes in water quality such as red tides must be stopped. Sixth, remove the seaweed in the aquaculture pond In recent years, the algae breeding in the breeding ponds in our area has been rapid. It absorbs a large amount of nutrients in the water, which makes the aquaculture ponds become thinner and restricts the propagation and growth of other food organisms. The proliferation of vines and the transparency of pool water seriously affect sea otters. Survival and growth of shrimp.
Feline Infectious Peritonitis (FIP), referred to as Feline Infectious Peritonitis (FIP), is a fatal abnormal immune response that occurs in cats. It is caused by the mutation of the feline coronavirus carried by cats. As a high-incidence and fatal disease of pet cats, the current incidence of feline abdominal transmission is about 10%.
The symptoms of cats are usually divided into two categories, namely wet FIP and dry FIP, of which wet FIP accounts for the majority of all cases. About 70%, manifested as abdominal pleural effusion, abnormal bulging; dry FIP cats have different symptoms, depending on the type of organ affected by the virus.
So far, all feline feline feline treatments are based on the characteristics of the disease, and GS-441524 can play a role in the treatment of feline feline disease. Therefore, the therapeutic effect of GS-441524 is obviously more ideal, the dose used is less, the treatment cycle is shorter, and the efficacy, safety and convenience of operation are all good. Because of this, GS-441524 is considered by many pet owners and veterinarians to be a magic medicine that can effectively treat feline abdominal infection.
Gs 441524 Fip,Fip Treatment Gs441,Gs 441524 Fipv Cats,Gs 441524 For Fip XI AN RHINE BIOLOGICAL TECHNOLOGY CO.,LTD , https://www.rhinebioteches.com
Problems that Should Be Paid Attention to in the Polyculture of Jellyfish and Prawns
Prev Article
Take pine pollen notes