-
How to Mix Fish Feed? Nine Practical Formulas Explained
1. Suitable for grass carp or silver carp and bighead carp: rice straw powder 70%, soybean cake 15%, cottonseed cake 10%, cornmeal 5%, plus bone meal 1%, salt 0.5%, and an appropriate amount of vitamins. 2. Suitable for cage-cultured grass carp: soybean straw or peanut vine 60%, soybean cake 15%, rapeseed cake (or cottonseed cake) 10%, cornmeal 10%, fish meal 5%, plus clam shell powder (or bone meal) 1%, salt 0.5%. 3. Suitable for grass carp: green grass powder (or peanut vine, sweet potato vine) 45%, soybean cake 15
-
How Thai Fish Sauce Is Made and the Detailed Steps
In Thailand, there is no one who does not know how fresh and savory fish sauce tastes; it is one of the seasonings commonly used by the Thai people when cooking dishes. Fish sauce tastes salty and extremely savory, with a slight fishy smell of fish and shrimp. It is rich in calcium, iodine, protein, fat and other minerals, and is eaten 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 (AD 1656-1688). It is said that because Thailand has so many fish, many small fish are extremely cheap, and fish that cannot be eaten are often
-
Practical tips for saving feed in yellow catfish farming
Currently, yellow catfish (Pelteobagrus fulvidraco) farming is quite widespread, and it is a major farmed species through which fisher-farmers in many places increase their income. 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 farming water body, which not only drives up farming costs day by day but also causes the water quality to deteriorate continuously, affecting the growth of yellow catfish and resulting in low farming returns. How can feed costs be saved in production practice? Strictly remove trash, clear the pond and disinfect. Clearing and disinfecting the pond can both kill wild trash fish and reduce
-
What are the reasons for fewer diseases in polyculture of fish and shrimp?
1 Polyculture area and species The total polyculture area of Pacific white shrimp (Litopenaeus vannamei) with milkfish (Chanos chanos) and male tilapia was 400 mu. A total of 330,000 milkfish fry were stocked, with 200 mu for polyculture of Pacific white shrimp and milkfish, 120 mu for polyculture of Pacific white shrimp and male tilapia, and 80 mu for milkfish monoculture as a control. 2 Pre-stocking work Before releasing the fry, pond clearing, pond drying and disinfection were carried out according to routine procedures. Seawater was introduced in a timely manner, and fertilizer was applied to cultivate basic bait organisms. 3 Stocking density and stocking period The number of fry to be released can be determined according to the pond conditions, management
-
What are the causes of copper sulfate-induced fish poisoning?
Copper sulfate is a commonly used drug for treating fish diseases, but because some users are unfamiliar with its properties, it often causes harm. 1 Case reports Case 1: In March 1987, Liantang Aquatic Farm used copper sulfate at 0.7g/m3 to kill algae in a broodstock pond, and three days later all the broodstock died. Water quality analysis showed an ammonia content of 0.35g/L. Case 2: From August 30 to 31, 1999, a 0.67hm2 fattened fry pond with a water depth of 1m owned by a farmer in Bayi Township, Nanchang County, due to sultry weather
-
Prevention and Treatment Methods for Common Bacterial Diseases in Farmed Fish
1. Explosive Hemorrhagic Disease, also known as bacterial septicemia, is currently the infectious disease in China that harms the most fish species, covers the largest scope, has the widest epidemic areas, the longest epidemic season, and causes the greatest losses. The disease is mainly caused by two pathogenic bacteria: Aeromonas hydrophila and Aeromonas sobria. After the disease develops, the fish body surface becomes congested, the anus becomes red and swollen, the abdomen becomes distended, and a large amount of ascites accumulates in the abdominal cavity with hemolysis. There is no food in the intestinal tract, but there is a lot of mucus. The disease is sometimes accompanied by exophthalmos, erect scales,
-
Symptoms and Prevention Methods of Fish Skin Hyperemia Disease
This disease is mainly caused by insufficient light, poor water quality, or excessive stimulation from new water. Symptoms: The skin on the body surface of diseased fish develops dark red patches of varying sizes, covering both sides, with a noticeable decrease in appetite; mild cases affect ornamental value, while severe cases lead to death. Diagnosis and countermeasures: a. Dissolve 0.2 g of nitrofurazone powder and 250 g of table salt in 10 kg of water, and soak the diseased fish for 10-20 minutes. b. Extend the lighting time of the aquarium. c. Soak the diseased fish in a low-concentration potassium permanganate solution for 10 hours. d. Sprinkle with salt water.
-
Deep-sea fish overfished, more endangered than pandas
The latest research by Canadian scientists shows that various deep-water fish species in the Atlantic have been overfished by humans, and the situation is very serious; their survival status is even more endangered than that of giant pandas and Bengal tigers. Canadian biologists studied five species of deep-sea fish in Canadian waters from 1978 to 1994 to understand the severe impact on marine ecology caused by coastal fishermen shifting to deep-sea fishing. Scientists found that over seventeen years, these five fish species plunged by at least 87% and by as much as 98%. They
-
Detailed Explanation of Key Points and Methods for Artificial Breeding Technology of Catfish
I. Materials and Methods 1. Experimental Site and Facilities The experiment used the original spawning ponds and hatching ponds for artificial breeding of carp, crucian carp, and the four major Chinese carps. For the spawning nests, palm bark was steamed and disinfected, then strung together with bamboo poles or ropes and suspended in the middle and upper layers of the spawning pond, with the pond bottom covered with palm bark. 2. Source and Cultivation of Broodstock Broodstock were mainly collected from wild fish in Biliuhe Reservoir in Dalian City and subjected to intensive pond cultivation. Broodstock were fed freshwater trash fish and freshwater mussel meat. The average body weight of males was 500
-
A Comprehensive Interpretation of the Development of the Ornamental Fish Industry
I. Overview of the Development of China's Ornamental Fish Industry 1. The Development History of China's Ornamental Fish Industry China is the hometown of the goldfish. Goldfish have been kept by Chinese people for more than 2,000 years, and were introduced to the West in the early 16th century, where they were highly favored by European and American countries and called the "sacred fish of the East." Goldfish have become a worldwide species and occupy an important position among ornamental fish. 2. The Current Development Status of China's Ornamental Fish Industry The rapid development of ornamental fish in China began in the late 1980s and early 1990s
条件筛选