The fish is commonly found in rivers, lakes, and other water bodies, particularly in the streams of Dongting Lake and the upper reaches of the Xiangjiang River. It has an elongated body with a large head and small tail, and its back is flat. The dorsal and anal fins are notably long, with some individuals having even larger fin structures than others. The fish lacks spines, has a smooth, scaleless surface, and is typically gray-brown or brown-yellow, with a lighter belly. All its fins are dark gray. This benthic species prefers dark areas and caves, is nocturnal, and demonstrates strong environmental adaptability. It can tolerate low oxygen levels and thrives in water temperatures ranging from 10°C to 34°C, with an optimal range of 24°C to 30°C. As an omnivorous fish, it primarily feeds on small fish, shrimp, aquatic insects, and dead animal matter in natural waters, but can also be raised on commercial feed in captivity. Its flesh is tender and nutritious, offering benefits such as improving muscle strength, promoting blood circulation, and helping treat conditions like children's malnutrition, women's weakness, and asthma.
For pond cultivation, the ponds should be small to medium-sized, suitable for garden or single-pond farming. They require a steady water supply, clean water quality, and convenient water intake and drainage systems. The pond bottom should be flat with minimal sludge, and the water retention must be good. The area typically ranges from 67 to 1,334 square meters, with a depth of 1 to 1.5 meters. Water inlets and outlets should have anti-escape devices. Aquatic plants like water hyacinths can be planted in corners to provide shelter for the fish. It’s advisable to install nets around the pond base with mesh sizes between 0.2 cm and 0.4 cm, extending 80 cm high and buried 20 cm into the soil to prevent predators like snakes and frogs from entering. Before stocking, the pond should be drained 10 days in advance and disinfected with 80–100 kg of lime per 667 square meters.
When selecting fingerlings, they should be healthy, disease-free, and uniform in size. In larger ponds, about 20,000 to 30,000 fish per 667 square meters (3–5 cm in size) are stocked, while in smaller ponds, 80 to 100 fish per square meter is ideal. Before stocking, the fish should be soaked in 3% saline solution for approximately 10 minutes to reduce stress and enhance survival.
The fish can be fed a wide variety of food sources, including snails, clams, fly larvae, cockroaches, dead fish, shrimp, slaughterhouse by-products, and artificial compound feeds. When feeding snails, clams, or similar items, it’s best to mash them and mix with powdered feed. The protein content of granulated feed should be at least 30%. Feeding should occur twice daily, ideally in the early morning and late evening, to match the fish’s natural feeding habits. The amount of feed should be adjusted based on weather, water temperature, water quality, and the fish’s eating behavior, with a daily feeding rate of 5–8% of the fish’s body weight.
During routine management, organic fertilizers should be applied appropriately to cultivate zooplankton and increase natural food availability, thus reducing costs. New water should be added regularly—once every 7–10 days under normal conditions, and more frequently (every 5–7 days) during hot seasons. Each water change should add 10–15 cm of fresh water to improve water quality. Quicklime should be used every 15 days at a rate of 15–20 grams per cubic meter to adjust pH and improve water conditions. Regular morning and evening patrols are essential to monitor water quality and fish activity. During rainy days, check the pond’s escape prevention systems and protect against snakes, rats, and other threats.
Disease prevention is crucial. Common diseases include gill rot, fungal infections, and enteritis. To prevent gill rot, use 1 gram of bleaching powder per cubic meter of water. For fungal infections, apply 400 grams of baking soda and 400 grams of salt per cubic meter. To manage enteritis, sprinkle 0.3 grams of strong chlorine powder per cubic meter of water, and mix 100 grams of medicine into every 50 kilograms of feed for three consecutive days. By following these practices, you can ensure healthy and productive fish farming.
Drawer Lock
Drawer locks are essential hardware components designed to provide security and controlled access to drawers in homes, offices, and commercial spaces. These locking mechanisms come in various styles and functionalities to suit different types of drawers, including wooden, metal, plastic, and glass varieties. Whether you need to safeguard important documents, valuables, tools, or personal belongings, drawer locks offer a reliable solution to prevent unauthorized access and enhance safety.
There are many types of drawer locks available, including cam locks, electronic keypad locks, combination locks, magnetic locks, and RFID-enabled smart locks. Cam locks are among the most common and are favored for their simple design and effective locking capability. Electronic keypad and smart locks provide keyless access options, ideal for modern office environments and high-security requirements. Magnetic locks offer a hidden locking mechanism, which adds an extra layer of security while maintaining an aesthetic appearance.
Installation of drawer locks can vary depending on the type and model. Many locks are designed for easy DIY installation, requiring only basic tools, while others may need professional fitting for optimal performance. Some locks come with adjustable features to fit drawers of different thicknesses, ensuring versatility. Moreover, many drawer locks are designed to be tamper-resistant and durable, constructed with high-quality materials such as zinc alloy, stainless steel, or hardened plastic to withstand daily wear and potential break-in attempts.
Drawer locks also cater to specific needs such as child safety, privacy, and theft prevention. Childproof drawer locks are particularly useful in homes with toddlers, helping to keep dangerous items like sharp utensils, medicines, or chemicals securely out of reach. In office settings, drawer locks protect confidential files and sensitive materials, maintaining privacy and compliance with data security regulations. For workshops and industrial environments, heavy-duty drawer locks secure valuable tools and equipment, reducing loss and improving inventory control.
In addition to security, some drawer locks offer convenience features such as quick-release mechanisms, silent locking, and integration with smart home systems. Smart drawer locks can be controlled remotely via smartphones, allowing users to monitor access logs, set temporary access codes, and receive alerts about unauthorized attempts. These advanced features make drawer locks not just a security tool but a part of modern connected living.
Choosing the right drawer lock depends on various factors including the type of drawer, security level required, ease of use, and budget. It’s important to consider the lock’s compatibility with your drawer material and thickness, as well as any additional features that might enhance usability and security. With the wide range of options available, drawer locks can be tailored to fit almost any application, providing peace of mind and protecting your valuables effectively.
Whether you are upgrading existing furniture, securing filing cabinets, or adding safety features to storage units, drawer locks are a practical and essential addition. Explore the diverse selection of drawer locks to find the perfect balance of security, convenience, and style for your specific needs.
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