-
Detailed explanation of fish medication techniques, teaching you to use drugs scientifically
After falling ill, aquatic animals generally reduce their food intake, and often appear swimming alone away from the group or climbing onto the shore and into the water grass. For groups of aquatic animals with severely declined appetite, even if the drug is mixed into the feed and fed, only the portion of aquatic animals that have not yet lost their feeding ability can eat the medicated bait, making it difficult to achieve the goal of comprehensive drug treatment. When adopting the treatment method of feeding medicated bait, full consideration must be given to the food intake of the sick aquatic animals. The author advocates preparing the medicated bait according to the actual food intake of the aquatic animals during the disease outbreak.
-
Infectious hematopoietic necrosis (IHN) of fish is a viral disease
[Pathogen] The pathogen of infectious hematopoietic necrosis of fish is infectious hematopoietic necrosis virus (abbreviated IHNV). [Symptoms and pathological changes] Affected fish initially show slow swimming and drift downstream, then swim with a swaying motion, and subsequently float up and roll sideways, often dying shortly after violent swimming. The diseased fish have darkened body color, protruding eyeballs, a distended abdomen, congestion at the base of the fins, and often a long, thick white mucous string hanging from the anus. On necropsy, a large amount of fluid is visible in the abdominal cavity, the liver, spleen and kidney are pale in color, the intestine is hemorrhagic, and the oral wall and skeletal muscle
-
What are the prevention and treatment methods for fish lice disease in snakehead (Channa maculata)?
(1) Pathogen: fish lice. (2) Symptoms: After being parasitized by fish lice, the diseased fish become extremely restless, swimming frantically and leaping about, with increased mucus on the body surface, and are prone to concurrent saprolegniasis and other diseases. The harm to fingerlings is enormous, and in severe cases it can cause mass death of the diseased fish. The peak incidence period is from May to September each year. It is a common disease of snakehead (Channa maculata). (3) Prevention and treatment: Sprinkle 0.4×0.000001 Yuchongqing over the entire pond.
-
Two Key Techniques for High and Stable Yields of Yellow Catfish: Disease Control and Fishing Technology
In artificial farming of yellow catfish, the key technical measures for high and stable yields should focus on two things - disease control and daily harvesting of yellow catfish. Yellow catfish, also known as yellow catfish, yellow sprout head, yellow ding fish, yellow fish, yellow drum fish, river catfish, ga ya zi, river yellow catfish, Wallace's yellow catfish, mo ding, ounce fish, yellow horn, ga fish, yellow spine fish, yellow ox withered, grass withered, yellow cheek fish, ounce male fish and yellow bone fish, etc., is a small freshwater economic fish and a famous, special and excellent variety. To farm yellow catfish well, the key work lies in doing a good job of disease and pest control for yellow catfish,
-
Prevention and Control Methods and Technical Key Points for Complications in Fingerling Fish
An unusual combination of complications - rotten gills, enteritis and hemorrhage - once occurred in fingerling fish in Sanhe Town, Hongze County, Huai'an City, Jiangsu Province, causing large-scale deaths of fingerlings. The specific details of the disease and its prevention and control measures are summarized below for everyone to discuss together. Onset time and symptoms: In early August, scattered dead fish appeared, and the diseased fish had Trichodina on their gill filaments, with no other symptoms. Around mid-August, mass mortality occurred, and all were grass carp fingerlings. The diseased fish turned dark in body color and showed a behavior of lying at the edge, floating weakly by the pond bank and stopping feeding. When the diseased fish were scooped up
-
Detailed Explanation of Techniques for Raising Fish Fry in Reservoir Cages Without Feeding
In reservoirs with fertile water quality, using cages to raise silver carp and bighead carp fry without feeding is not only practical and feasible, but also has advantages such as not occupying fry ponds, not spending on fish feed, and low cost. Without feeding, raising one silver carp or bighead carp fry of about 13cm in a cage in a reservoir costs less than 0.10 yuan, while raising one fry of the same size in a pond costs more than 0.10 yuan; converted per mu, the yield is about 150,000 fry/mu or more, which is 30-40 times that of internal ponds. Therefore, reservoir cage culture without feeding
-
The integrated fish-goose farming model can increase economic returns by 30%.
Integrated fish-goose farming is a three-dimensional ecological farming model that combines poultry rearing with fisheries management. According to comparisons, under the same conditions, integrated fish-goose farming increases economic returns by about 30% compared with raising fish or geese separately. 1. Benefits of integrated fish-goose farming. 1. Geese are fully automatic, energy-saving and highly efficient aerators for fish ponds. In integrated fish-goose farming, farmers do not need to worry about oxygen depletion in the water caused by weather changes, because whenever the weather changes, the geese will scramble to jump into the water to bathe and chase each other, churning up splashes, which has a particularly good oxygenating effect on the fish pond.
-
Understanding the definition and classification of fish medicines in one article
A drug refers to a substance used to prevent, treat and diagnose diseases and to help the body restore normal function. As the name implies, a fishery drug refers to a drug specifically used in fisheries to ensure the healthy growth of aquatic animals and plants. Therefore, its scope of application is limited to the aquaculture and enhancement industry, while substances used in capture fisheries and the aquatic product processing industry are not included in the category of fishery drugs. Modern aquaculture fisheries are divided into two major parts: the culture and enhancement of various aquatic animals such as fish, shrimp, shellfish, turtles and soft-shelled turtles, and the cultivation of aquatic plants mainly consisting of algae such as nori and kelp.
-
Detailed Explanation of Fish Nutritional Requirements and Formulation Key Points
1. Nutritional requirements of farmed fish: The optimal requirement levels of major components such as protein, fat, and carbohydrates in fish feed vary depending on technical factors such as fish species, feeding habits, different growth stages, water temperature, water quality, and feeding methods. 2. Formula for compound fish feed: Several major fish feed formulas are introduced below for readers' reference. (1) Compound feed for black carp: fish meal 35%, soybean cake 47.5%, barley 15%, yeast 1%, minerals 1.5%, plus added multivitamins, feed conversion ratio 2.26.
-
How to grow Indian lettuce for high yields? Cultivation techniques for high-quality fish forage grass
Indian lettuce is an annual or perennial herbaceous plant in the Asteraceae family, genus Lactuca. It is rich in nutrients, and its crude protein content is 35%-40% higher than that of Sudan grass, which enjoys the title of "king of forage grasses." The tender leaves of Indian lettuce contain a lot of carbohydrates, have good palatability, and a utilization rate of nearly 100%, making it a superior green feed for fish. Indian lettuce is the best "green forage" for "filling the gap between seasons and bridging to the peak season" between the off-season of ryegrass and the coming peak season of Sudan grass. It can serve both as the "staple food" for herbivorous fish and as a "delicacy" for cultivating fish species such as black carp, grass carp, and bream. Cultivation characteristics
条件筛选