-
How can the survival rate of artificially bred black carp be improved?
The maturation period of black carp is later than that of silver carp, bighead carp and grass carp broodstock, and the gonads generally struggle to reach the standard for induced spawning at the end of stage IV. Therefore, a method of promoting maturation should be adopted. 15 to 20 days before induced spawning, seine the pond to check the maturity of the broodstock, and promptly give the less mature female and male broodstock
-
Key Points of Artificial Breeding Technology in Black Carp Aquaculture
The black carp is an excellent species for freshwater aquaculture in our country. It uses benthic organisms as feed, grows quickly, has a large individual size, tender flesh, and good flavor, and is high in fat and protein with abundant vitamin content, making it highly valued by the public and professional aquaculture households. The demand for fry is increasing day by
-
A Detailed Guide to Catching Techniques for Farmed Mandarin Fish
I. Catching Mandarin Fish with Nets. 1. Catching Mandarin Fish with Gill Nets: Gill nets can be single-layered or multi-layered, but in actual production, single-layer nets are mostly used to reduce costs. When using gill nets to catch mandarin fish, the nets should be set according to different seasons and different water environments. For example, in reservoirs, nets should be set along the cliff
-
Detailed Explanation of Key Technical Points for Raising Mandarin Fish in Ponds
(1) Selection of breeding conditions: Choose a pond with abundant water source, convenient water filling and drainage, and excellent water quality, with a pond area generally of 2~3 mu and a water depth of 1.5~2 m. (2) Preparation before stocking: ① Disinfect the pond. ② After clearing the main breeding pond, apply decomposed base
-
Experience sharing on self-breeding live bait for mandarin fish farming
Last year, the mandarin fish farming area in Wujiang City exceeded 10,000 mu. Zhang Qifang, a skilled mandarin fish farmer at the Sixth Branch of the East Taihu Aquaculture General Farm, farmed 20 mu of mandarin fish in 1999, with 83.5 mu of supporting ponds (of which 44 mu were used for restocking oriental river prawns), achieving a mandarin fish yield of 613 kg per mu and a per-mu profit of 3,163 yuan. Mandarin fish alone
-
Common Winter Disease Prevention and Treatment Methods for Freshwater Piranha
In winter, when the water temperature is between 15°C and 20°C, juvenile freshwater piranha are prone to Ichthyophthirius disease, white skin disease, and Dactylogyrus disease. During overwintering, freshwater piranha are prone to saprolegniasis, water mold disease, and Trichodina disease. The symptoms and prevention and treatment methods for these diseases are introduced below
-
How do you make meat-based feed for hwamei breeding?
[Ingredients for hwamei meat-based feed] Main ingredient: corn. Supplementary ingredients: soybean flour, fish meal, beef meal, chicken meal, peanut kernel powder, water centipede powder, eggs, honey. [Formula for hwamei meat-based feed] Corn 250 grams, soybean flour 100 grams, fish meal 50 grams, beef meal 25 grams, chicken
-
Points to Note on Feed Storage in Hwamei Breeding
To prevent hwamei feed from spoiling, the following points must be noted during feed storage: (1) Prepare in appropriate amounts. When preparing hwamei feed, the amount to be mixed should be determined according to factors such as the season and climate, the number of hwamei birds, and the type and nature of the feed. Generally, it is advisable to prepare an amount sufficient for about half a month to 1 month each time. Because hwamei birds have a very small appetite, feed should be prepared frequently. If too much is processed and prepared at one time, it is prone to mold and spoilage, fat deterioration, and the vitamins contained in the feed are very easily oxidized and destroyed. If repeatedly roasted and stir-fried, its flavor and nutritional content will also be reduced. Especially in the plum rain season, it is most prone to mold and insect infestation, so feed is best prepared fresh and used for a short period. In addition, each time food is added, it should not be too much; about enough for 3—4 days is advisable, and more should be added after it is eaten, so as to maintain the fresh taste of the feed.</p><p>(2) The containers for storing feed should have good air permeability. It is best to choose wooden boxes, cloth bags, bamboo baskets, etc. Some plastic bottles release certain harmful substances, so be sure not to use them to hold bird food. The utensils for holding egg millet should be placed in a ventilated and dry place, and during the plum rain season they can also be put in the refrigerator for storage. Each time food is added, half a cup is advisable; do not add too full, and develop the habit of adding frequently and checking frequently. If too much is added and it is too full, first, the hwamei bird is likely to scatter it with its beak and cause waste; second, the bird food is also prone to clumping and molding, especially the feed at the bottom of the cup, which clumps and molds fastest. In order not to let the hwamei bird scatter the food with its beak while eating, a bamboo tube used for holding food can have a semicircular opening cut in it, allowing the bird to put its head in to eat, so that it has no room to look around while eating.
-
Sharing Experience in Feeding and Managing Thrush Birds
Thrushes can be kept as nestlings or adults, but adults are harder to tame and train, so most enthusiasts prefer to keep nestlings. Thrushes are classified by age into four types: nestling, soft-feathered, full-feathered, and old-feathered. A nestling is a young bird that has just hatched and has not yet left the nest; once the nestling
-
Methods for the Prevention and Treatment of Fowl Cholera in Hwamei Breeding
1. Cause Cholera, also known as pasteurellosis or hemorrhagic septicemia, is an acute septicemic infectious disease caused by Pasteurella multocida. The bacteria exist both in sick birds and in healthy birds. When a bird's resistance declines due to malnutrition, the bacteria
条件筛选