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Prevention and Control Methods and Technical Key Points for the "Huaban" Disease in Sea Cucumber Aquaculture
This disease is also called "sliding board disease", "board-shedding disease" and "disintegration disease". It mostly occurs when barrel-shaped larvae metamorphose into five-tentacle larvae and in juvenile sea cucumbers after the larvae attach to boards. It is one of the most serious and commonly occurring epidemic diseases in the late stage of sea cucumber (Apostichopus japonicus) seedling rearing. The disease is highly contagious and develops quickly
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Prevention and Treatment of Rabies in Nutria Breeding
1) Prodromal stage. During this period, affected nutrias are briefly depressed and move slowly; the symptoms at this stage are not easy to notice. 2) Excitation stage. Affected nutrias show excitement and aggressive behavior, lunging at people and other animals, biting, clawing, and tearing everything they encounter. Affected nutrias can injure their own tongue, teeth, and gums and can break their lower teeth. Affected nutrias refuse food, do not drink water, and often swallow various objects placed in the cage. The violent stage recurs repeatedly; during episodes the affected nutrias groan, salivate excessively, and have diarrhea. 3) Paralysis stage. During this stage the paralysis process intensifies, manifesting as swaying of the hindquarters and paralysis of the hind limbs. Body temperature drops. Sick nutrias cannot rise, lie down unconsciously, and die in spasms and convulsions. (2) Necropsy: the gastrointestinal mucosa is congested or hemorrhagic; the liver is dark red and flaccid; the spleen is slightly enlarged, and there are also cases in which it is 2-3 times larger than normal. Anemia is found in the kidneys, and the boundary between the cortical layer and the medullary layer disappears. In some cases there is pulmonary hemorrhage. In the brain, congestion appears due to blood vessels being highly filled and dilated with blood. The fluid in the ventricles increases, and pinpoint hemorrhages are often found in the brain tissue. 4) Prevention. The measure for preventing rabies on nutria farms is to resolutely prevent outside dogs from entering the nutria breeding area; keepers must also be vaccinated against rabies. If rabies-infected nutrias are found on the farm, a blockade must be resolutely implemented, and the epidemic situation must be reported promptly to the higher competent department. Resolutely prevent sick nutrias on the farm from escaping off the farm; confirmed rabies-infected nutrias or carcasses of nutrias that died of the disease must all be burned or deeply buried; individuals that have not developed the disease must be examined one by one so that sick nutrias are detected in time. Healthy nutrias must all be injected with rabies hyperimmune serum, and 7-10 days later injected with rabies vaccine. Counting from the last case that died of rabies, the blockade is lifted after 2 months.
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Experience in Rearing Yellow Catfish Fingerlings in Ponds
Based on the characteristics at this stage, such as the increased size of yellow catfish fry, feeding habits basically similar to those of adult fish, stronger schooling behavior, increased food intake, and stronger adaptability to the ecological environment, and given that water temperatures are generally high during the rearing process, it is necessary to take into account the characteristics of yellow catfish and grasp
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Experience and Techniques for Polyculture of River Crabs and Bass in Summer
This polyculture model of river crabs and bass fully utilizes the water body space, forming a composite ecosystem where fish and crabs coexist in a mutually beneficial relationship, reducing the disease rate, greatly improving the market quality of commercial crabs, and increasing farming income. The technical key points are summarized below:
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Key Technical Points on Drug Use in Eel Farming in Summer and Autumn
In the high-temperature seasons of summer and autumn, eel growth is at its most vigorous, but the incidence of eel diseases is also at its highest. Many farmers, when eels fall ill, resort to desperate measures and use drugs haphazardly, only to spend a lot of money in vain without curing the eel diseases. Worse still, drug abuse causes water quality pollution,
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How to prevent and treat tuberculosis in pigeons? Pigeon keepers need to master these methods
This disease is a typical chronic, wasting infectious disease of pigeons and other poultry, characterized by stubborn diarrhea, anemia, emaciation, and nodules of varying sizes in the organs. The pathogen is Mycobacterium avium, which is not highly virulent to humans and animals. Natural infection is usually caused by
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How to solve the feed problem in gecko farming
1 Light trapping: This is one of the most effective methods. The insect season basically coincides with the gecko's main active feeding period, and with the breeding period when it needs the largest amount of food. In addition to hanging lights to attract insects in the rearing house, black-light lamps and ordinary oil lamps powered by batteries can also be used to collect insects.
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Artificial Breeding Methods and Technical Key Points for Golden Cicadas
When it comes to the golden cicada, everyone also thinks of the idiom "golden cicada sheds its shell," meaning to use a stratagem to escape so that others cannot discover it in time. This shows that the golden cicada is a very cunning and very clever insect. In fact, this understanding of the golden cicada is still far from enough; in many places
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Prevention and Treatment of Mange in Hedgehog Farming
1) Causes: This disease is an external parasitic disease caused by mange mites and acarids parasitizing within the skin. In humid environments, especially during the rainy seasons of autumn and early winter, acarids reproduce vigorously and spread rapidly. In addition, poor management, unclean burrows and sheds, and unclean skin can trigger this disease.
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What is a dung beetle? Introducing you to this insect
Many people do not know much about the dung beetle. What is a dung beetle? What physical features does it have? What are its living habits like? Below we will introduce the dung beetle to you. What is a dung beetle? The dung beetle is also called the shi ke lang, and many people also call it shi ge (g) lang
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