☞ The top ten WeChat public accounts that aquatic people will pay attention to
Help the little fish
Click "Follow" to add WeChat,
Pull you into the breeding exchange group
Small ciliates, shrimp farmers can also cause trouble if they are not handled properly
Some old aquaculture areas, the pond substrate with the extension of the breeding time and poor breeding habits (a large number of use of manure to base) so that the occurrence of ciliate disease more and more, due to breeding friends do not understand the ciliate disease, often resulting in untimely discovery and improper treatment, and even often lead to more serious diseases, and even drainage ponds!
First, what are the circumstances in which shrimp are susceptible to ciliary disease?
1. Insufficient shrimp feeding and poor feeding bait (egg duck feed, rice bran, wheat bran, etc.), forced to eat mud, dead algae, resulting in malnutrition at the Amaranth stage, so that the shrimp physique declines, thereby reducing the resistance to ciliates, and causing shrimp molting difficulties! (As the saying goes, persimmons also look for soft pinches).)
2, unfermented manure base (chicken manure, bird droppings, etc.), because the utilization rate of manure is not fermented on the use of very low, resulting in a large number of unused manure residue pond bottom, ciliates by ingesting organic matter in the water body to obtain food, to ciliates to provide a large number of "food", the application of unfermented manure is tantamount to aiding and abetting abuse!
3. Improper fertilization method (use of inorganic fertilizer).
a, often there is this phenomenon occurs, after the release of seedlings due to the large number of livestock such as rotifers and other zooplankton water quality suddenly become clear, breeding friends in the case of not knowing the original commission, they are in a hurry to add fertilizer, once not on the continuous use, finally, the water is not fertilized (rotifers eat algae), ammonia nitrogen is indeed getting higher and higher, the bottom pollution is aggravated;
b, the frequent use of inorganic fertilizer (urea, compound fertilizer, etc.), due to the nutritional imbalance of inorganic fertilizer, it is easier to cultivate small algae (chlorella, etc.), and provides a large number of natural bait for ciliates, which promotes the growth and reproduction of ciliates.
4, after the sudden change of weather, it is easy to appear a large number of algae death sinking bottom (inverted algae), water turbidity and other phenomena, so that shrimp stress, physique decline, while a large number of dead algae is conducive to the growth and reproduction of ciliates; therefore, before the weather changes, according to the water conditions, more aeration equipment should be opened, timely supplement the nutrition required by algae and decompose organic matter, stable water quality is very critical!
5. Do not change the bottom or use the product improperly.
A, some breeding friends said that just put seedlings for more than ten days, the bottom of the pond is not dirty, do not need to change the bottom. In fact, the normal replacement of algae per day is also very large.
We have done experiments in aquariums, feeding bait normally every day, in just 15 days, the bottom has accumulated 1mm thick dead algae and residual bait and feces, you can imagine, what will happen in the breeding pond?
b. The use of incorrect bottom modification products, especially the bottom modification products with adsorption effect such as zeolite powder, will also increase the incidence of ciliary disease. The reason is very simple, after the use of this type of product, it will obviously show that the water body becomes clean and refreshing, so where does the so-called "dirty things" that are originally suspended in the water go?
6. Frequent disinfection.
Shrimp diseases are not treated in the prevention, this truth is understood by everyone, but some breeding friends have misunderstood. Regular disinfection is considered to be "disease prevention". In fact, on the contrary, regular disinfection, although it can kill some pathogenic bacteria, but also kill beneficial bacteria and some algae, resulting in water change, and making shrimp have different degrees of stress response, thereby reducing physical fitness. Create favorable conditions for the parasite of ciliates!
Second, common phenomena before the occurrence of ciliate disease
1. The bait table is sticky and slippery, and the feeding table is very heavy.
2. Shrimp feeding is slowed down, and naked eye observation often has symptoms of yellow gills, green gills and yellow legs.
3, long time does not molt the shell.
4. Touched by hand, the shrimp body is rough (shell worm) or sticky (polycondensal worm, tired branch worm, etc.).
5. When shrimp lie on the edge and "pick up sand", it is also necessary to detect in time.
Third, how to correctly prevent and treat ciliate disease
1. Thoroughly clear the pond, regularly use a degradable substrate modifier after the seedlings are released, reduce the bottom pollution, give ciliates "cut grain", and at the same time effectively inhibit the eggs.
2. After the seedlings are released, the high-quality open bait (100,000 seedlings and 1 kg of material, two meals a day) are fed in sufficient quantities, and the ingredients are not less than 10% per day to ensure that the shrimp fry are eaten everywhere, which is conducive to training and enhancing the physique of the shrimp. The most important thing is to reduce the bacterial diseases (such as bacterial enteritis) caused by shrimp fry eating mud and dead algae.
3. In the early stage of ciliate, there are generally no obvious symptoms of shrimp, naked eye observation and feeding are more normal, at this time regularly change the bottom, you can effectively control the reproduction of ciliates.
4. When it is found that the surface of the shrimp body is green or yellow, and there is a sticky and slippery feeling when touched by hand, it has already represented that ciliate disease is more serious, and should be checked and treated in time. If the overall feeding is relatively normal, the method of washing the shrimp body, adjusting the water quality and improving the substrate can be adopted, which can effectively help the shrimp to smoothly molt.
Many farmers often ask why I have cleared the pond to disinfect the ciliates?
Myth 1: Water body branch horn biological bait is infected with ciliates
Here is an example I often encounter, many farmers have just put seedlings into the pond, the water body of the branches and rotifers and other plankton bait is very rich, at this time the microscopic shrimp fry body is translucent, full of stomach, appendages are complete. However, when I examined the phylum, I found that the whole body of the phylloids was parasitized by ciliates.
Continue to follow up the visit, the water quality indicators are all within the normal range, but there are shrimp fry swimming ponds. Microscopic examination of shrimp fry showed that the shrimp fry were parasitized by ciliates on the second day of entering the pond, and the shrimp fry in these swimming ponds had an empty stomach and a white liver color.
Myth 2: Incorrect disinfection operations allow ciliates to multiply in large numbers
There are many areas with more backward breeding technology, and there are some misconceptions among farmers, believing that after the water in the temporary pond is disinfected with bleaching powder, lime or other chlorine preparations, the water should be drained, and then the bottom of the pool should be flushed with a water pump two or three times, and the toxicity of the disinfectant should be rinsed off before the seedlings were put into the water.
However, this is not useful, such a wrong operation instead of the water body is not disinfected, and also the ciliate eggs at the bottom of the pond are stirred up, and the temperature is just enough to meet the growth needs of ciliates, and naturally multiply.
Myth 3: The full decomposition of organic matter at the bottom of the pond provides bait for ciliates
There are also some areas with poor breeding conditions, in order to save breeding costs, farmers often do not use lime or bleach powder to clear the pond, but simply let the sun directly sun the bottom of the pond, although the surface of the pond has been cracked, but the organic matter at the bottom of the pond has not been fully decomposed, which provides bait for the breeding of ciliates. In some parts of Fujian, some soil pond farmers directly release seedlings without disinfection treatment, which lays the groundwork for the occurrence of breeding diseases.
Ciliate disease is a shrimp farming process often occurs, is also easy to be ignored disease, as long as we can correctly understand, timely discovery, by improving the shrimp physique and improve the breeding environment, while not blindly using insecticidal drugs (zinc sulfate, copper sulfate, etc.), ciliate is not a problem!
"Bangbang Aquatic Products 6.18 Mid-year Promotion"
Cash drop, the lowest price of the year, the best deal is coming!
Click "Read the original article" for details