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What are the tricks for making money from conventional fish farming?
In recent years, the market price of conventional fish has kept falling, sometimes even approaching the cost price, and fish farmers lose money with the slightest carelessness. Can conventional fish farming still make money? The author visited some large fish farmers with relatively good farming profits and, based on a summary of their successful experience, offers the following 10 production suggestions. 1. Pollution-free farming. With the implementation of the pollution-free agricultural product access system, the production of pollution-free aquatic products will certainly receive great attention. 2. Reasonable polyculture. Generally, there are many wild and miscellaneous fish in adult fish ponds
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Detailed Explanation of Key Technical Points for Restocking Fish Fingerlings After Heavy Rain
Every year, some areas are hit by typhoons and heavy rain, causing fish pond embankments to collapse and serious fish escapes. After the rainy season, timely restocking of fish fingerlings will reduce the losses caused by flooding to a minimum. The techniques for restocking fish fingerlings after heavy rain are introduced below. 1. Sources of fish fingerlings After heavy rain, if the weather is hot, fish fingerlings are not convenient to transport over long distances, so they are generally obtained locally, or caught from nearby natural water bodies. The caught fish fingerlings should be stocked nearby, and the time out of water must not be too long. All operations
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Practical Tips for Saving Feed in Yellow Catfish Farming
Currently, yellow catfish (Pelteobagrus fulvidraco) farming is quite widespread and is a major species for increasing income among fish farmers in many places. However, during the farming process, many farmers, in their one-sided pursuit of output, do not know how to save feed and continuously put excessive feed and fertilizer into the aquaculture water. This not only causes farming costs to rise day by day, but also continuously deteriorates water quality, affecting the growth of yellow catfish and resulting in low farming benefits. How can feed costs be saved in production practice? Strictly remove trash fish and disinfect the pond. Pond disinfection can kill wild trash fish, reduce competitors for food
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What are protozoan diseases in pufferfish?
Pathogen: Cryptocaryon irritans, with a spherical or oval body similar to Ichthyophthirius multifiliis, measuring 0.066-0.45×0.034-0.36mm, covered entirely with cilia and generally having four bead-like macronuclei. Epidemiology: Cryptocaryon irritans mainly parasitizes the gills, skin, fins and other parts of marine fish. It is prevalent in coastal sea areas from mid-May to August each year. The suitable breeding temperature for Cryptocaryon irritans is 20-25°C, and it is transmitted by *cysts and their larvae. Symptoms: First, a large number of small white spots appear on the body surface, and in severe cases
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7 Highly Effective New Fish Medications Recommended for Aquaculture Reference
Fish parasite killer. This product is an external insecticide for black carp, grass carp, bighead carp, crucian carp, and bream, capable of expelling and killing Sinergasilus, Lernaea, Trichodina, Ichthyophthirius, Gyrodactylus, sporozoans, Dactylogyrus, fish lice, glochidia, and other parasites on fish within a few hours, and can also kill aquatic centipedes, ants, and other pests. High-chlorine preparation. This product is a bactericide. It has a powerful killing effect on bacteria, fungi, pathogens, fungi, pathogens, etc., and is effective against hemorrhage disease, red skin disease, stamping disease, gill rot, black gills, enteritis, shell rot, and red
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Key Points and Methods for Comprehensive Prevention and Control of Fish Surfacing
From June to October each year, temperatures are high and the weather is muggy. If fish are stocked at excessive density and water quality deteriorates, it can easily cause fish to surface due to oxygen deficiency, or even suffocate to death. In severe cases, all pond fish can die within 1 to 2 hours. Therefore, correctly analyzing the causes of fish surfacing and identifying the signs and severity of fish surfacing is of great significance for strengthening routine management and promptly rescuing fish from pond turnover. (1) Causes of fish surfacing. There are mainly the following aspects: (1) Blindly overfeeding and overfertilizing, resulting in excessively fertile water, massive proliferation of plankton, rising oxygen consumption by organic matter and declining dissolved oxygen.
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What methods are there for controlling the sex of fish?
Controlling the sex of fish is an effective way to increase fish production. Generally, sex hormones can be used to induce the sex of fish to develop in the direction people want. Sex hormones are divided into two types: those secreted by the testes are male hormones, and those secreted by the ovaries are female hormones. The primitive germinal epithelium tissue of fish simultaneously has two components: the cortex, which determines development toward female, and the medulla, which determines development toward male. Under the action of female hormones, the cortex differentiates into ovaries, while the medulla does not develop, resulting in a female with egg-laying reproductive function; conversely, under the action of male hormones, the fish will become male. Therefore, during
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Cage fish disease prevention and control relies on these four services
Recently, it has been a season of high incidence of cage fish diseases. The fishery authorities of Ningbo City, Zhejiang Province, have carried out four services to comprehensively implement disease prevention and control work. 1. Science and technology outreach service. Disease monitoring reporters in each area regularly visit each monitoring point and surrounding cage aquaculture areas to learn about conditions. Municipal-level disease monitoring reporters are guaranteed to go to the grassroots to carry out services twice a week (1-2 days each time). 2. Rapid response service. If fishermen encounter sudden disease outbreaks, experts are organized to rush to the scene within 2 hours. Recently,
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How to prevent disease when stocking fish in spring? A detailed guide to practical measures
In spring, as water temperatures rise, pathogens multiply easily. When stocking fish, besides choosing high-quality fingerlings of uniform size and without injuries, attention must also be paid to preventing disease. The main measures are as follows: Pond preparation and tool disinfection. Before stocking fish, weeds should be removed, excess silt cleared away, leaks plugged, and the pond bottom leveled. Then quicklime, bleaching powder, and other substances should be applied by broadcasting over the entire pond. Fishing nets, fish buckets, and other @#@233@#@ tools should be exposed to sunlight for about 2 days before use, or soaked and disinfected in high-concentration quicklime water, bleaching powder solution, and the like.
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Common Spring Fish Disease Prevention and Control Methods and Technical Key Points
1. Gill rot disease. Pathogen: Myxococcus. Symptoms: The diseased fish has a darkened body color, stays away from the school, and stops feeding. The gill filaments are rotten and covered with mud, the inner epidermis of the operculum is congested, and it is often corroded into round transparent small holes, commonly known as "open skylight". After grass carp gill lamellae are infected with Myxococcus, the tissue in the affected area shows varying degrees of rot, ulceration, and invasive hemorrhage. Cultured fish such as black carp, grass carp, and bighead carp can all develop this disease, especially causing the greatest harm to grass carp. Below a water temperature of 15°C, it is generally rare; it begins to become epidemic at around 20°C. Prevention: At a water depth of 1
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