The American gold cocoon, also known as the silk cocoon, is one of the most renowned fish species in the United States. It's not only famous for its striking appearance but also for its delicious and tender meat. Compared to other freshwater fish like the Chinese mandarin fish, which is often called the "king of freshwater," the American gold cocoon has higher levels of protein and amino acids. It even surpasses herring, soft-shelled turtles, and stingrays in nutritional value. Rich in essential minerals such as calcium, magnesium, and phosphorus, it’s also packed with trace elements and vitamins like iron, sodium, and potassium.
**First, Artificial Breeding**
Artificial breeding of the American gold cocoon begins when the water temperature stabilizes around 14°C. The ideal temperature for ovulation is between 18°C and 20°C. To prepare the broodstock, they are kept in cages for two hours beforehand and given a gentle water stimulation. Common types of hormones used include pituitary glands from salmon, human chorionic gonadotropin (hCG), and luteinizing hormone-releasing hormone analogs (LHRH). Males are typically injected once, while females receive two injections. After 8 to 24 hours, artificial insemination can be carried out. The incubation period varies depending on the water temperature—around 12 days at 12°C, and just 5 days at 18°C. When the temperature is between 14°C and 18°C, the hatching rate ranges from 85% to 90%.
**Second, Aquaculture Production**
**1. Larval Fish Rearing**
When raising larvae in large ponds, the area should be between 3 to 5 mu (approximately 2 to 3.3 acres), with a water depth of 1.0 to 1.5 meters. Before stocking, it's important to ensure the water is well-fertilized and of high quality. The stocking density is usually between 50,000 to 100,000 fry per mu, using semi-intensive methods. Smaller cement pools, ranging from dozens to hundreds of square meters, are also commonly used for rearing. In these pools, thousands of eggs are placed per square meter. For intensive farming, stocking densities must be carefully managed, starting at about 100,000 to 200,000 per acre.
**2. Fingerling Rearing**
Once the fish grow to 2–3 cm in length, they are transferred to larger tanks or ponds. Stocking density is typically 500 to 600 per mu, but this can be increased to 7,000 to 10,000 per mu in intensive systems. At this stage, the fish can be trained to eat artificial compound feed. This helps improve growth rates and overall health.
**3. Adult Fish Rearing**
For adult fish, the pond size should range from 5 to 15 mu (about 3.3 to 10 acres) with a water depth of 1.5 to 2.5 meters. When using full-price compound feed, the stocking density should be controlled at 1,500 to 3,000 fish per acre for those measuring 10–15 cm. A combination of light fertilization and feeding is recommended for daily management. By the end of the year, the average market weight can reach 150 grams per fish, with a yield of over 400 kg per mu. This makes the American gold cocoon a highly valuable and profitable aquaculture species.
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The Network CCTV Wireless Security Camera
Compared with wired cameras, wireless security cameras are less invasive to your home, so they are easier and faster to set up. No need to drill through walls or ceilings. Wireless cameras are also more flexible than wired systems because they are not as constrained as wired systems.
The biggest disadvantage of a wireless Camera System is that it is completely dependent on the strength of your Wi-Fi connection. Any interruption or weak signal can mean that you may lose connection to the system, resulting in the loss of the film, which can be critical
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Working principle of camera
The working principle of the camera is to reflect the light to the sensor, convert the signal captured by the sensor into a digital signal, and finally send it to the computer to display the image. Then the camera can capture the static and dynamic images in the picture.
The sensor of the camera is the most important part. It can capture light and convert it into electrical signals. There are many types of sensors, the most common are CCD and CMOS sensors, which can be used to capture images.
The internal circuit of the camera will convert the signal captured by the sensor into a digital signal and send it to the computer. The computer uses these signals to display images, or it can save images to the hard disk drive.
If the camera is not connected to the network, it will not be able to achieve real-time monitoring, but the camera will still work and save the pictures and videos taken. If we need to view, we can only remove the memory for viewing.
The smart camera can also support remote monitoring. You can remotely view the real-time image of the camera through your mobile phone or computer. Users can view the image of the camera anytime, anywhere, to better protect the security of your home or office.
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