Squid is a popular freshwater fish found throughout the country, and its market in South Korea and Japan is particularly strong. As a result, the squid market has a large scale, with relatively stable prices. For farmers looking to make a profitable choice this year, raising squid can be an excellent option. Now is the time for stocking fish species, and to help everyone raise healthy carp, we're sharing some new experiences from carp farming in the Chengdu area. These insights may be useful for farmers in other regions.
First, selecting the right breeding species is crucial. In the Chengdu area, most pond cultivation focuses on heterotrophic silver carp, followed by Peng Zexiong, while Xiangyun carp and others are less commonly raised. From our experience, although Xiangyun carp grow the fastest, many farmers avoid them due to poor market response at harvest. While Ziyu Silver Stork may not grow as fast as Xiangyun carp, they outperform Peng Zexi significantly, making them the dominant species in Chengdu’s plains. About 90% of farmers raise this variety. Peng Zexi, though slower-growing, is highly favored by foreign investors, making it a key export species.
It's important to note that due to the prevalence of mixed salmon varieties, some seed producers lack responsibility, leading to a decline in the quality of fine breeds. Therefore, when purchasing fry, farmers should choose reputable suppliers, sign contracts, and ensure their rights are protected to avoid being deceived by unscrupulous traders.
Second, designing an effective stocking strategy is essential. Carp farming has evolved from traditional pond systems to more advanced methods, with per-mu yields increasing from 100-200 kg to 500-1000 kg, with some reaching over 2 tons. To reduce costs, many farmers in Chengdu now cultivate their own large-sized fry. They raise fry weighing over 50 grams in specific areas during the first year, which saves the need to purchase young fish. This approach allows for earlier stocking and longer growth periods, resulting in larger fish and higher profits.
Special ponds are used for raising fry. Each mu can hold 10,000 fry of 5-10 cm length, which can reach 400-700 kg of 50-60 gram fish by year-end. Adult fish ponds can hold 2000-4000 fish per mu, with weights of 50 grams or more, achieving 500-1500 kg of commercial fish by year-end.
Third, choosing compatible species is vital. Grass carp and carp should not be stocked together, as they compete heavily for food. Instead, a small number of tilapia and mackerel (about 20% of the total, including 10% carp) can be added, along with a small amount of Wuchang fish. It's also best to avoid feeding too early, as this can disrupt the feeding habits of the carp.
Fourth, patience and domestication play a key role in successful farming. Eels are naturally shy, and the older they get, the harder they are to tame. It's best to complete taming during the fingerling stage. Domesticated fish are easier to manage and show better feed efficiency. Adding attractants to feed during taming helps speed up the process. A higher stocking density also aids acclimation, and maintaining clear water improves results. Feeding should be done on the surface to create a consistent feeding pattern.
Fifth, optimizing feeding efficiency is critical. Squid can tolerate fertilizer, and dissolved oxygen levels above 3 mg/L are ideal. Maintaining higher oxygen levels (above 4 mg/L) reduces feed conversion rates by about 0.2. Regular water changes and aerator use are recommended. Organic fertilizers like pig or chicken manure can be used to supplement feed, improving fish color and appearance. However, high-yield farms often avoid organic fertilizers.
Feeding machines are highly recommended. Compared to manual feeding, they ensure even distribution and allow weaker fish to eat properly, resulting in more uniform sizes. Feed particle size should match the fish size: 0.5 mm for under 5g, 1.5 mm for 5-12g, 2.5 mm for 30-50g, and 3-3.5 mm for 100-200g. Daily feeding amounts depend on fish size, water temperature, and dissolved oxygen levels. Normally, juveniles should be fed 5%-8%, while adults receive 2%-3%. Adjustments should be made based on oxygen levels, and only 70%-80% of the calculated amount should be given to avoid overfeeding.
Lastly, disease prevention is essential. Although carp are generally resistant, poor pond conditions and overcrowding can lead to more frequent diseases. Common diseases include saprophyte, vertical scale disease, gill rot, trichinosis, and anchor worm. Prevention measures include salt baths, disinfectants, and medicated feeds. Regular monitoring and timely treatment are crucial to minimize losses.
By following these practices, farmers can improve productivity, reduce costs, and ensure healthier, more profitable squid farming operations.
Nootropic
α- GPC is a water-soluble substance with two fatty acids removed from the main phospholipid PC (phosphatidylcholine) constituting the cell membrane.α- GPC is a water-soluble substance with two fatty acids removed from the main phospholipid PC (phosphatidylcholine) constituting the cell membrane.
Originally widely existing in organisms, it is one of the body components existing in human breast milk and body fluids. Research in the food industry shows that GPC can be obtained by removing fatty acids (deacyl) in the structure with PC in soybean lecithin as raw material. In the revision of food and drug classification in 2009 α- GPC (sn-glycerol-3-choline phosphate) is defined as food.
Purpose: brain health food. It is clinically used to prevent and treat atherosclerosis, fatty liver, neurasthenia and malnutrition. It can also be used as an additive for food, cosmetics and pharmaceutical excipients. It can be transformed into hemolytic lecithin by phospholipase a.
Prevent choline deficiency, increase neurotransmitters and promote the secretion of growth hormone. Although both eggs and eggs contain choline, it is confirmed that the uptake in the form of GPC is faster than the absorption through the portal system, and it is easier and more efficient to convert to choline. And GPC is one of the few five that can pass through the blood-brain barrier, so it can be quickly converted from choline to acetylcholine.
Alpha GPC Powder, 9-Fluorenol Powder, Phenibut Powder, Tianeptine Sodium Powder
Xi'an Tian Guangyuan Biotech Co., Ltd. , https://www.tgybiotech.com
