-
How to scientifically manage fish ponds when diseases break out frequently under high summer temperatures
How to manage fish ponds well in summer when diseases break out frequently under high temperatures
-
How to Improve the Utilization Rate of Winter-Idle Fish Fry Ponds
After the winter pond consolidation until the release of summer fry the following year, most fish fry ponds have an idle period of about half a year. If they are comprehensively utilized, the utilization rate and economic benefits of the fish fry ponds can be greatly improved. Four methods of utilizing winter-idle fish fry ponds are introduced below. Raising market-size fish: Using winter-idle fish fry ponds to raise one season of market-size fish can both increase output and help regulate the "summer shortage" aquatic product market. Because the rearing period is relatively short and the temperature is relatively low, the following techniques should be adopted: 1. Stock early, that is, stock immediately after the fish fry are consolidated into ponds, so as to make full use of the growing period. The stocking amount is calculated at a maximum water depth of about 2 m, generally 125 kg to 150 kg per mu. For the stocking ratio, generally silver carp account for about 40%, bighead carp about 10%, grass carp and bream about 30%, and black carp and common carp about 20%. Release @#@233@#@ large-size fingerlings, generally silver carp and bighead carp above 250 g, grass carp above 500 g, bream above 100 g, black carp above 1000 g, and common carp above 250 g. 2. Strengthen management. Fertilize promptly after the fish are stocked. Fertilization should mainly use organic fertilizer to ensure that the pond water has a certain fertility. In winter, choose clear and warm weather and feed once every 2 to 3 days, with the feeding amount at about 20% of the usual amount. In spring, as the water temperature rises, increase the feeding amount and maintain good water quality, so that the fish school maintains a relatively high growth rate and reaches the market size on schedule.
-
Detailed Explanation of Prevention and Treatment Methods for Fungal Disease of Fish Internal Organs
Pathogen: Saprolegnia. Symptoms: Diseased fish generally have a distended abdomen, with red patches on the abdominal surface; dissection of the abdomen reveals the surface of the internal organ mass covered with fine hyphae, and red patches on the stomach, swim bladder, and liver. Infection initially occurs in the stomach, where it develops fully; the hyphae penetrate the stomach wall and develop within the abdominal cavity, causing ascites, and invade nearby organs as well as the peritoneum and muscles. After the diseased fish dies, the hyphae extend out through the abdominal wall. Prevention: 100ppm methylene blue can inhibit its development; using it to disinfect fish ponds can reduce infection.
-
What are the precautions for winter fishing?
Remove debris from the pond before fishing. To ensure safe winter fishing, you must remove debris from the fish pond, such as tree stumps, branches, wire mesh, white pollutants, etc. Adapt to the pond conditions. Before fishing, do a good job of draining and filling the fish pond; if the pond water level is too deep, making it inconvenient to operate a seine net, the water level can be lowered to 1-1.5 m, but after fishing, immediately fill the water to above 2.5 m to increase the water level for insulation, so that marketable fish that have not reached standard size can overwinter safely, ready for continued profitable breeding next year. The net should be set gently and retrieved quickly. Remember, before setting the net,
-
Home-style recipe and cooking tips for honey beans with fish slices
Cuisine: Guangdong cuisine. Ingredients: 200 g grass carp flesh, 150 g honey beans, 10 g carrot, 10 g ginger. Seasonings: 30 g peanut oil, 10 g salt, 10 g MSG, 2 g white sugar, an appropriate amount of wet cornstarch, 5 g sesame oil. 1. Cut off the tough strings from the honey beans, slice the carrot and ginger, peel the grass carp flesh, chop it into a paste with the back of a knife, add a little salt, MSG and cornstarch, mix well and beat until it becomes sticky, put it into a flat pan and spread the fish paste evenly, pan-fry the fish paste over low heat until cooked through on both sides, then lift it out and cut into slices. 2. Heat the wok and add
-
What kind of fish is the Nile tilapia? An introduction to its breed characteristics
The Nile tilapia (Oreochromis niloticus), or tilapia for short, is also called the Nile tilapia. It is native to Africa. Taiwan, China introduced it in 1966, and trial farming produced good results; it has now become one of the main species in Taiwan's freshwater aquaculture. In 1978, mainland China introduced this fish successively from Thailand and from the Nile river system. After years of trial farming, the results showed that the Nile tilapia can adapt to the water conditions of most regions of our country, grows well, and has a good yield-increasing effect. At present it has been promoted for farming in more than 20
-
Steamed Fish
Ingredients: 1 whitefish (about 800 g), 5 g cooked ham slices, 25 g bamboo shoot slices, 4 dried shiitake mushrooms (soaked), 50 g diced pork back fat, 20 g Shaoxing wine, 5 g refined salt, 1 g each of soy sauce, scallion knot and ginger slices, 50 g chicken stock. Method: (1) Clean the fish, blanch it in water at about 80 percent boiling heat, remove and drain, gently scrape the mucus off the fish with a knife, rinse clean with water, and cut off the tail with a knife at the 2/3 point of the fish body; (2) Place the fish in a steaming basin, put the bamboo shoots on top of the fish
-
What are the common causes of fish death? A detailed guide to prevention methods
Due to farmland irrigation and the rise and fall of tides, river water flows frequently, increasing the chances of polluted water flowing into fish ponds, or the pond's own pollution combined with sudden weather changes can all cause fish deaths. In order to help farmers accurately identify the causes of fish death in daily production and management, and promptly take measures to prevent fish deaths, here are the diagnosis and prevention methods for fish deaths under several circumstances: 1. Fish deaths from disease 1. Water body conditions: The intake and discharge of pond water generally can only be completed under human-controlled conditions, and most are closed
-
What are the precautions for disinfecting fish species? These points you need to know
① In production practice, the specific drug used for disinfection depends on the fish diseases prevalent in the local area and the availability of the drug; the disinfection containers should be wooden basins, wooden buckets, fish bags, clay jars, etc., and metal products should not be used. ② The disinfection time is best chosen at 8-9 pm or 3-4 pm on a sunny day; a long soaking time kills pathogens more thoroughly, but if the time is too long and the dissolved oxygen in the water is insufficient, it will cause fish to gasp at the surface or die. Therefore, during the actual operation, special attention must be paid to the behavior of the fish. When the fish in the disinfectant solution cannot endure it
-
Mott dwarf elephant grass is suitable as forage for fish farming
Mott dwarf elephant grass is a grass-family forage introduced from the United States a few years ago. This grass is perennial, with a plant height of 0.8-1.4 m, short and numerous nodes, a large amount of leaves per plant, and strong tillering and regrowth ability. It is relatively cold-tolerant; in winter the aboveground part turns yellow and withers, while the underground part survives. It sprouts in spring and begins to grow when the temperature is around 12°C. It prefers to grow in places with deep, fertile and moist soil. This forage is high-yielding and highly nutritious. Under good water and fertilizer conditions, it can produce 15,000-20,000 kg of fresh grass per mu, and its leaf amount accounts for 8
条件筛选