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Introduction Methods and Technical Key Points for Breeding Snakes
The quality of snake introduction for breeding affects the survival rate and reproductive capacity of the snakes. To obtain breeding snakes, one may, after approval from the relevant management department, go into the wild to catch snakes oneself; if local snake resources are scarce, breeding snakes need to be introduced. 1. The best season for introduction is spring and autumn. In spring, the weather
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Detailed explanation of large-mouth catfish farming technology, master the methods of catfish farming
I. Biological characteristics The large-mouth catfish is one of the fastest-growing and largest species among fish of the order Siluriformes, family Siluridae. Common individuals weigh 5-10KG, and the largest individuals reach 60KG. Its head is wide and somewhat flat, its eyes are small and its mouth is large, hence the name large-mouth catfish. Its upper and lower jaws are densely covered with fine teeth that curve inward like barbs, making it extremely difficult for prey to escape once bitten. Adult fish have two pairs of barbels, of which one pair of maxillary barbels is very long, while the other pair of mandibular barbels is very short and often hard to notice, but in the juvenile stage there are 3 pairs of barbels. Its dorsal fin is short and small, clustered, with no hard spines; the pectoral fin has a thick, sturdy hard spine with no obvious serrations on the outer side, but it feels rough to the touch; the anal fin is extremely long and connected to the caudal fin; the caudal fin is small, concave in the middle, and the upper lobe is longer than the lower lobe. The body color of the large-mouth catfish varies with the environment and the type of food. The back and sides of the body are mostly yellowish brown, bluish gray, or yellow-green, while the belly is grayish white, mixed with black spots, but without cloud-like patterns, and all fins are grayish black.</p><p></p><p>I. Pond main culture</p><p>1. Fingerling stocking To increase the survival rate and improve farming benefits, the large-mouth catfish fingerlings stocked must be above 8cm and uniform in size. For stocking density, stock 1000-1500 fish per mu at the 8cm-10cm size; stock 800-1200 fish per mu at the 10cm-12cm size, and polyculture 100-120 large-size silver carp and bighead carp fingerlings of 150g-250g in the pond to regulate water quality. 2. Feed feeding The large-mouth catfish is a carnivorous fish, mainly using live fish or chilled fresh fish and animal viscera as bait, but it can also be trained artificially to eat artificial compound feed. (1) Carnivorous bait: when stocking large-mouth catfish fingerlings, correspondingly stock slightly smaller carp, crucian carp and other fingerlings. Each day, still mainly use chilled fresh fish chunks, and pig lungs, cattle lungs and other animal viscera can also be fed. When these animal feeds cannot be guaranteed, artificial taming for feeding can be used to make them eat artificial compound feed, which can achieve relatively good results. (2) Artificial compound feed: the protein content of the compound feed is 41%-50%. When feeding, set up (2-4) feeding tables in each pond to make it easier to observe feeding conditions. 3. Daily management Patrol the pond 3 times a day in the morning, noon and evening to observe fish feeding and growth conditions, change the water once every 5d-7d, strictly prevent the large-mouth catfish from floating to the surface, and take corresponding preventive measures. II. Pond polyculture In adult fish ponds, broodstock ponds, or large lakes and reservoirs with abundant wild trash fish, depending on the abundance of forage fish, polyculture 15-30 large-size large-mouth catfish fingerlings of 8cm-10cm per mu. Without increasing feed input, without requiring special management, and without affecting the main cultured fish, 30kg-50kg of marketable large-mouth catfish (individual weight 1.5kg-3.5kg) can be produced in the same year. The technology for polyculturing large-mouth catfish in adult fish ponds is simple, with low input and high returns, but in production attention should be paid to: large-mouth catfish cannot be polycultured in the same pond with carnivorous fish such as mandarin fish and snakehead, and smaller-size large-mouth catfish cannot be stocked for polyculture; the size is best above 8cm.</p><p>III. Cage culture</p><p>1. Cages According to fingerling size, equip three types of cages with different mesh sizes: first-level fingerling cages, second-level fingerling cages, and adult fish cages. First-level fingerling cage: mesh 0.6cm-0.8cm, size 4mx4mx2m or 5mx5mx2m, single-layer warp-knitted knotless polyethylene open-top cage; second-level fingerling cage: polyethylene knotted open-top cage with mesh 1cm—1.5cm, size 4mx4mx3m or 5mx5mx3m; adult fish cage: mesh 2.5cm-4cm, size 4mx4mx3m or 5mx5mx3m double-layer polyethylene knotted closed cage. 2. Fingerling stocking Large-mouth catfish used for first-level stocking are most suitably stocked in early to mid-May each year. For stocking density, stock 500-600 large-mouth catfish fingerlings per m2 at the 4cm-5cm size. After 15d-20d of rearing, divide them by size into separate cages for rearing. At the 8cm-10cm size, stock 350-450 fish per m2. When they reach above 15cm, promptly transfer them to second-level cages and stock 250-300 fish per m2. When the fingerlings reach about 25g, transfer them to adult fish cages and stock 40-60 fish per m20.</p><p>3. Feed feeding In cages, feeding tables are set up to make it easier to observe fish feeding conditions and ensure full use of the feed. Generally, set up 1 feeding table per 1Om2, suspended inside the cage 20cm—30cm above the cage bottom. When the total length of the large-mouth catfish is 5cm-10cm, the daily feeding rate is 8%-10% of fish body weight; at total length 10cm-20cm, it can be adjusted to 4%-6%; when total length is above 20cm, the feeding rate is 1%-3%. Feed three times daily in the morning, afternoon and evening. Among these, slightly increase the feeding amount in the evening. The bait can mainly be wild trash fish, chilled fresh fish, and animal viscera, and artificial compound feed can also be fed through artificial taming. The method is: after the fingerlings enter the cage, first stop feeding for 1d-2d to make them feel slightly hungry, then each day place a small amount of attractant on the feeding table and slowly feed artificial compound feed. As the fish adapt to the artificial compound feed, correspondingly reduce the amount of attractant until the large-mouth catfish completely adapts to eating artificial compound feed. (1) Fingerling-stage feed formula: fish meal 42%, a-starch 15%, soybean meal 10.9%, peanut kernel meal 18%, yeast powder 3.3%, scallop powder 5.2%, fish oil 3.1%, premix 2.5%, crude protein content 35%. (2) Adult-fish-stage feed formula: fish meal 25%, wheat middlings 18%, soybean meal 18%, peanut kernel meal 18%, yeast powder 5%, fish oil 1.1%, corn 10.4%, compound amino acids 2%, premix 2.5%, crude protein content 35%. 4. Rearing management During the fingerling cultivation stage, cage sorting and screening should be done well. Regular cage sorting is a key measure to increase fingerling survival rate. Generally, during the fingerling stage, sieve all fish once every 15d-20d and rear them in separate cages by size. At 8cm-10cm, transfer them to second-level fingerling cages; when they reach about 25g, they can be put into adult fish cages for rearing. In daily rearing, the large-mouth catfish has sharp mouth teeth. When bait is insufficient or when it feeds on bait beside the cage, it easily bites through the netting. Usually, regularly check the cages for damage, regularly clean the feeding tables, ensure unobstructed water flow inside and outside the cages, regularly check the bait condition on the feeding tables, remove spoiled and deteriorated residual bait, and appropriately increase or decrease the feeding amount according to how much bait remains.</p>
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Bullfrog Farming Techniques: Key Points for Rearing and Managing Adult Bullfrogs
After young bullfrogs have been cultivated for a period and their individuals have grown to 50 g-100 g, they can enter the adult frog farming stage. Selection and design of adult frog ponds. Adult frogs are stronger than young frogs in both adaptability and predation ability, so the adult frog farming site should be larger; for example, various natural water-holding ponds, pits and ponds, fish ponds, weed-covered lowlands, and rice fields can all be used, and ponds can also be built under melon sheds, in tree shade in front of or behind houses, or under grape trellises in courtyards.
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Overwintering Management Techniques for Rana Chensinensis in Enclosed-Gully Farming
Rana chensinensis has the habit of hibernating and overwintering underwater. From late September each year to mid-to-late April of the following year, a period of up to 6 months, the overwintering management of artificially enclosed-gully frog farming consists of selecting and creating suitable overwintering sites and aquatic environments according to the characteristics and needs of Rana chensinensis during this period,
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Overwintering Cold-Protection Management Technical Measures for Tilapia Aquaculture
Tilapia has the characteristics of being omnivorous, easy to raise, fast-growing, quick to reach market size, low in cost, and less prone to disease, making it an excellent species widely cultured in our province. However, this fish is a tropical and subtropical species, and whenever a strong cold front moves south and the water temperature drops to around 10°C, there is a risk of freezing to death and cold injury.
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Detailed Explanation of Key Points for Intensive Snakehead Farming Technology
The northern snakehead is commonly known as snakehead, spotted snakehead, ink-head fish, etc. At present, the main species farmed in China are the northern snakehead, the spotted snakehead and their hybrids. The northern snakehead is a valuable economic fish among the Channidae, with large individuals, fast growth, high yield and high economic value; its flesh is delicate and delicious
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Detailed key points for juvenile crab cultivation, crab farming techniques shared
1. Create a good ecological environment. First, the nursery pond area should be about 5-10 mu, which is conducive to uniform feeding and water quality control and other management tasks, and also facilitates one-time pond clearing, harvesting and sales; second, do a good job of pond clearing and escape prevention to prevent snakes, frogs, wild trash fish, etc.
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Detailed Explanation of Key Technical Points for Semi-Wild Soft-Shelled Turtle Farming
Semi-wild soft-shelled turtle farming is a healthy farming method that imitates the natural growth habits of soft-shelled turtles. The farming cycle (3 to 4 years) is relatively long, so the soft-shelled turtles produced have the excellent quality of wild characteristics and sell very well on the market. The average yield is generally 250 to 300 kg per mu, with an average annual income of about 6,000 yuan per mu, achieving relatively good economic, social and ecological benefits.
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Technical Points and Methods for Raising Free-Range Chickens Under Forest Canopies
Woodland Selection The woodland for raising free-range chickens should be spacious and open, with a certain slope, but not too steep, with lush grass, convenient transportation, and access to drinking water for the chickens. The stocking density per mu of land should not exceed 100 birds. Chicken Coop Construction The chicken coop should be built close to the grazing area,
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Detailed Explanation of Key Points on Hatching Techniques for Silkie Chicken Breeding Eggs
I. Selection of Hatching Equipment Nowadays, hatching equipment has become increasingly sophisticated, basically achieving automation and microcomputer control. Traditional hatching methods are basically no longer used, and adopting modern hatching equipment not only saves manpower but also achieves a higher hatching rate.
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