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Be careful when using fishery drugs; these details cannot be neglected
How to prevent and treat fish diseases and correctly use fishery drugs is very important. If fishery drugs are not used correctly, it will bring economic losses to aquaculture farmers. In this regard, Li Zhengjun, director of the Fishery Drug and Fishery Feed Division of the Sichuan Provincial Fisheries Bureau, said that some fishery drugs are banned by the state. If they are used, they will lead to very serious consequences. He hopes that aquaculture farmers will never use banned fishery drugs. There are 32 banned fishery drugs in total, namely phorate, benzene hexachloride, lindane, toxaphene, dichlorodiphenyltrichloroethane DDT, calomel, mercurous nitrate,
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How Thai Fish Sauce Is Made and the Detailed Steps
In Thailand, everyone knows the delicious taste of fish sauce; it is one of the seasonings commonly used by Thai people when cooking dishes. Fish sauce tastes salty, extremely savory, with a slight fishy smell of fish and shrimp. It is rich in calcium, iodine, protein, fat and other minerals, and is used in the same way as soy sauce. Thailand has a long history of making fish sauce. The earliest consumption of fish sauce in Thailand began during the reign of King Narai of the Ayutthaya Dynasty (1656-1688 AD). It is said that because Thailand has so many fish, many small fish are extremely
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What varieties of freshwater angelfish are there? A detailed guide to common species classification
1. Common Angelfish Scientific name: pterophyllum scalare English name: Angelfish Native to the waters from the central Amazon River to the Peru and Ecuador region, it is the original species from which today's general artificially improved angelfish breeds are derived. In its scientific name, pterophyllum means "as soft and light as a feather," while scalare describes its body stripes as being like a ladder. Apart from breeding, there are no obvious external sexual characteristics; the male's external genital organ is pointed, while the female's is
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What kind of fish is the beautiful-banded loach? Introduction to its species characteristics
Common name: beautiful-banded loach. Origin and season: distributed in the Yuanjiang River system. Introduction: The head is slightly flat and depressed, with the cheek area bulging out. The lip surface is smooth or wrinkled. The tooth-like protrusion on the upper jaw is relatively weak, and the center of the lower jaw has a "V"-shaped notch, but it is sometimes not obvious. Body scales are small and fine, distributed only after the origin of the dorsal fin. The lateral line is complete. In small individuals, the head has spots only on the dorsal surface, while in larger specimens there are also spots or markings on the cheek area. A bottom-dwelling fish, inhabiting river sections with fast-flowing water and gravel substrates. The individuals are relatively large,
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What are the prevention and control methods for fish gyrodactyliasis?
Pathogen and prevalence The pathogens of fish gyrodactyliasis are Gyrodactylus medius, Gyrodactylus bacterialis, and Gyrodactylus elegans. This disease is mainly prevalent in spring and from late autumn to early winter, and excessive stocking density in ponds is the main cause of fish outbreaks. Symptoms Sick fish have a layer of grayish-white mucus on the skin and are thin and weak. In the early stage of the disease, they are extremely restless, sometimes swimming wildly, sometimes swimming sharply on their side. They rub against water grasses or the edges of tanks, trying to get rid of the infestation of the pathogens. Subsequently, appetite decreases, swimming becomes slow, and eventually they die. Prevention and control methods 1. When
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Key Points from the Seminar on Pollution-Free Fishery Product Certification
On August 14, at the 2007 National Pollution-Free Fishery Product Certification Exchange Seminar held in Shenyang, Liaoning Province, the person in charge of the Fishery Sub-center of the Agricultural Product Quality Safety Center of the Ministry of Agriculture stated: at present, China's fishery product certification rate (annual output of certified products/annual output of aquatic products) is still very low. In particular, in major fishery provinces with an annual output of more than 1 million tons, the certification rate is below 10%. China is a major fishery production country. In order to adapt to domestic and international consumption trends for fishery products and ensure the quality of fishery products
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How to identify the quality of fish feed? These practical tips are a must-know
The quality of pelleted feed for fish is closely related to farming profitability and should be given great attention. Its quality is mainly judged by five aspects: "look, smell, twist, soak, and chew," introduced as follows: First, look. Pelleted feed for fish is made by uniformly mixing and pelletizing several main raw materials such as fishmeal, soybean meal, cottonseed meal, rapeseed meal, wheat middlings, and meat-and-bone meal in a certain proportion. If there is more fishmeal and soybean meal, the feed color is slightly yellow; when there is more miscellaneous meal, the feed color is dark red; when there is more wheat middlings, the feed color is slightly grayish white, and so on.
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Symptoms and Prevention and Treatment Methods of Fish Intestinal Fungal Disease
The pathogen is Basidiobolus sp., belonging to the class Zygomycetes, order Entomophthorales, family Basidiobolaceae. Symptoms: The anterior abdomen and the area in front of the anus of diseased fish are noticeably swollen, forming two white protrusions. Because the anus is blocked, the diseased fish cannot defecate and soon dies. After death, the abdominal wall quickly rots through, exposing the viscous internal organs. Dissection of diseased fish reveals a white, sticky, fat-like substance coating the outside of the stomach and intestines; the intestines become thickened and white, with a thinned intestinal wall, and the interior is filled with hyphae and their conidia, especially densely packed at the end of the intestine. In a small number of diseased fish, hyphae are also distributed in the stomach, but no infection was observed
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What are the correct medication methods for fish?
The drugs used to prevent and treat fish diseases mainly include halogens (bleaching powder, sodium chloride, iodine, etc.), heavy metal salts (copper sulfate and ferrous sulfate, copper chloride, potassium dichromate, etc.), sulfonamides (sulfadiazine, sulfathiazole, sulfaguanidine, etc.), furans (nitrofurazone, furazolidone, etc.), organophosphate insecticides (trichlorfon, etc.), antibiotics (penicillin, streptomycin, chloramphenicol, chlortetracycline, oxytetracycline, erythromycin, etc.), Chinese herbal medicines (, , garlic, Euphorbia humifusa, Acalypha australis, etc.), with
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How to manage fish fingerlings in autumn? These technical points must be mastered
(1) Pond clearing. After the beginning of autumn, the fingerlings should be transferred to a pond that has been cleared and disinfected for cultivation, so that the fingerlings can safely overwinter. Where there are difficulties in the turnover of water sources and fish ponds, all the fingerlings can be transferred out for temporary holding, and the original pond can be disinfected with 75-100 kg of quicklime per mu, the water quality can be fertilized according to conventional methods, and the fingerlings can be transferred back after the drug has dissipated. (2) Separate rearing. The specifications of the fingerlings stocked in the same pond must be consistent. Large-sized fingerlings have a large food intake and a strong ability to compete for food. If small-sized fingerlings are stocked at the same time, the small-sized fingerlings will
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