In summer, fish ponds often reach their saturation point. At this stage, many adult fish have grown to marketable sizes and should be harvested promptly. This not only helps promote the growth of remaining fish and improve the quality of large fish but also reduces the overall stocking density in the pond. To ensure successful summer fishing, it's important to follow these key techniques:
First, choose a time for fishing when the weather is clear and cool, ideally just before or after dawn, when water temperatures are low. The exact timing can vary depending on the distance to the market and the sales schedule. Fishing during these conditions minimizes stress on the fish and allows fresh catches to be delivered quickly. Avoid fishing during hazy or hot weather, as fish may show signs of distress, such as gasping at the surface or showing symptoms of disease. In such cases, netting could result in high mortality. Also, avoid fishing in the evening, as this can increase water mixing and deplete dissolved oxygen, leading to fish floating due to low oxygen levels.
Second, reduce or stop feeding the day before fishing, especially in the afternoon. Avoid adding extra feed, as this can increase oxygen demand and cause fish to become agitated during capture, leading to injuries or death. A day or two before harvesting, remove any leftover bait and floating debris from the pond to keep the environment clean and reduce stress on the fish.
Third, use thinning nets (also called screen nets or four- or five-finger nets) during the fishing process. These nets should make up about one-fifth of the total net length, with mesh sizes small enough to catch the target species while allowing smaller fish to escape. Fish should be netted in shallow areas first, and the main net should be placed in deeper, downwind zones to prevent fish from suffocating due to poor water circulation.
Fourth, handle the fishing process carefully and efficiently. High water temperatures mean fish are more active and sensitive to prolonged exposure in the net. If left too long, they may suffer injuries or die from oxygen deprivation. Once the fish are gathered, avoid rushing them into the market. Instead, release the smaller fish first and selectively harvest the market-ready ones, returning any non-target species back to the pond. Avoid blindly selecting fish in the net, as this can lead to overcrowding, injury, or suffocation.
Finally, after fishing, immediately add fresh water or use an aerator to replenish oxygen levels. Fish activity increases, and oxygen consumption rises. Additionally, the disturbance caused by netting can stir up sediment and organic matter from the pond bottom, accelerating decomposition and further reducing oxygen levels. This can lead to oxygen deficiency and fish floating. Fish also produce excess mucus when stressed, which needs to be flushed out with fresh water or aeration. For example, during the day, run the aerator for about two hours after fishing. If fishing occurs at night, continue aeration until sunrise or until the fish no longer show signs of floating.
2. Proteins: Proteins can provide the nutrients needed by the skin and help skin cell renewal. Common protein ingredients are collagen and elastin.
3. Amino Acids: Amino acids are essential nutrients for skin cell growth and can help maintain healthy skin. Common amino acids are lysine, glycine, serine, etc.
4. Plant extracts: Plant extracts are rich in antioxidants and vitamins, which can help the skin resist free radical damage. Common plant extracts include green tea extracts, grape seed extracts, rose extracts and so on.
5. Fatty acids: Fatty acids can help maintain the water-oil balance of the skin, preventing dryness and wrinkles. Common fatty acids are linolenic acid, omega-3 fatty acids in fish oil, etc.
6. Peptides: Peptides can stimulate the skin to produce collagen, thus increasing the elasticity and firmness of the skin. Common peptide ingredients include lysine-tyrosine-lysine peptide and palmitoyl pentapeptide.
7. Enzymes: Enzymes can help skin cell renewal and increase skin metabolism, thus preventing skin aging. Common enzymes include fruit acids, lactic acid bacteria, etc.
Anti-aging And Anti-wrinkle Raw Materials
What are all the anti-aging cosmetic ingredients nowadays?
Cosmetic anti-aging and anti-wrinkle ingredients can be broadly categorized as follows:
1. Antioxidants: Antioxidants can resist free radical damage to the skin, thus preventing skin aging. Common antioxidants include Vitamin C, Vitamin E, Coenzyme Q10, green tea extract, and so on.2. Proteins: Proteins can provide the nutrients needed by the skin and help skin cell renewal. Common protein ingredients are collagen and elastin.
3. Amino Acids: Amino acids are essential nutrients for skin cell growth and can help maintain healthy skin. Common amino acids are lysine, glycine, serine, etc.
4. Plant extracts: Plant extracts are rich in antioxidants and vitamins, which can help the skin resist free radical damage. Common plant extracts include green tea extracts, grape seed extracts, rose extracts and so on.
5. Fatty acids: Fatty acids can help maintain the water-oil balance of the skin, preventing dryness and wrinkles. Common fatty acids are linolenic acid, omega-3 fatty acids in fish oil, etc.
6. Peptides: Peptides can stimulate the skin to produce collagen, thus increasing the elasticity and firmness of the skin. Common peptide ingredients include lysine-tyrosine-lysine peptide and palmitoyl pentapeptide.
7. Enzymes: Enzymes can help skin cell renewal and increase skin metabolism, thus preventing skin aging. Common enzymes include fruit acids, lactic acid bacteria, etc.
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