Squid artificial breeding practical technology

Squid farming involves careful planning and management to ensure optimal growth and health of the fish. Here's a revised and expanded version of the original content, written in natural, human-like English: --- **(a) Cultivating Large-Size Squid Species** 1. **Pond Conditions** For raising large squid species, the pond should have a sandy bottom with minimal silt, an area of 2–3 acres, and a water depth of at least 1.5 meters. The site must allow for efficient drainage and irrigation, maintain clear water without turbidity or pollution, and include a small amount of submerged aquatic plants. New ponds should be evaluated based on soil quality. Ponds that are acidic or have cloudy water are not suitable for rearing squid. 2. **Pond Preparation and Feeding Fish Cultivation** (1) On April 5th, lime is used to disinfect the pond, and grass fertilizer is placed in the corners around April 10th. If the pond bottom is already good, no additional fertilizer is needed. Freshwater is then added to a depth of 0.8–1.0 meters to cultivate natural food sources for feeding fish. (2) Commonly, carp fry are used as feed fish. Around April 15th, salmon eggs in floats are introduced into the pond for hatching. The fry density is generally maintained at about 500,000 per mu. Eggs can be hatched in batches—such as 1, 3, or 5—to accommodate different sizes of fry and prevent malnutrition. (3) Feed fish are managed by controlling their size. Fry measuring about 2 cm are stocked, while feed fish are kept around 1.2 cm. This helps ensure they are suitable for the squid’s dietary needs. 3. **Stocking and Breeding of Salmon Fry** (1) Eel fry are placed in the pond the day before, and 10 cm of fresh water is added to improve water quality. (2) The stocking density of carp fry is approximately 4,000 per mu. (3) Regular checks on the density of feed fish are conducted, and additional fish are added if necessary. (4) Water quality and weather conditions should be monitored closely. (5) Disease prevention includes managing pests such as ciliates and trichoderma, which are common but rarely cause severe issues. Refer to adult fish disease control methods for more details. **(b) Adult Carp Breeding** 1. **Fish Pond Conditions** For adult carp farming, the pond should have a sandy bottom with less than 15 cm of silt, an area of 3–8 mu, and a water depth of at least 1.5 meters. It should also have good water quality, no sewage inflow, and some areas for submerged plants. A shallow ditch (30–40 cm deep) is often dug around the pond for easier fishing. (1) The pond is disinfected with lime 10–12 days before introducing feed fish. (2) Natural bait is cultivated by adding 60 cm of water 7 days before stocking. About 150 kg of fertilized manure is applied per acre to promote zooplankton like rotifers and copepods. (3) Feed fish, such as white sea bass, are stocked at a rate of about 300,000 per mu. They are introduced the day before, with 10 cm of fresh water added to enrich the environment. After stocking, the fry are observed daily to check their growth, density, and the presence of red worms. When red worm numbers decrease, thick slurry is used to "spout the beach" to encourage feeding. Feeding is adjusted based on fry behavior and size. 2. **Stocking of Carp Species** (1) Before stocking puffer fish, half the water is drained and replaced with fresh water to create a slightly leaner environment. Water depth is gradually increased to over 1.5 meters. (2) Stocking density is approximately 800 fish per acre. 3. **Feeding Management** (1) **Feed Fish Selection**: Carp, silver carp, and other similar species are commonly used as feed. (2) **Feeding Techniques**: - Feed fish are regularly supplemented every 1–3 days. - To assess feed availability, observe the behavior of the carp: if they are actively chasing feed fish at the bottom, it indicates sufficient supply. If they are swimming near the surface and making loud noises, it may signal a shortage. - The size of the feed fish should be about one-third the length of the carp. If sizes vary, larger fish are filtered out. (3) **Water Quality Control**: Maintain water clarity at 30 cm and add fresh water every 5–7 days during hot months. Use alum or lime to treat cloudy water. Install aerators to prevent oxygen depletion, especially during hot weather. In emergencies, hydrogen peroxide or aeration spirit can be used to rescue floating fish. 4. **Disease Control** (1) **Ciliate Disease**: Caused by parasites like trichomonads, this disease can lead to loss of balance and death. Treatments include formaldehyde at 20PPM or specific drugs like “Fish Killer” from Shanghai. (2) **Anchor Worm Disease**: Treated using “Strong Insect Killer” or potassium permanganate solution. (3) **Fish Larvae**: Similar to anchor worm treatment, focus on removing the larvae from the fish. (4) **Cylindrotheca sinensis**: A parasitic infection that affects the gills and causes weight loss. Use specialized treatments like “Worm-Killing King.” (5) **Bacterial Rotting**: Apply “Strong Chlorine” or “Chuanfenjing” at specified dosages, combined with medicated baits for 7–10 days. (6) **Hemorrhagic Disease**: Caused by infected feed fish. Treat with “Strong Chlorine” and use medicated bait containing 12.5 kg of medicine per bag. Prepare the bait by mixing flour and cake, dissolving the drug, and feeding it to the fish in the evening when they are most active. This comprehensive approach ensures healthy, high-yield squid farming while maintaining environmental sustainability and fish well-being.

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