In the Winter months the weather changes rapidly.
During such changes, it is important to keep the water clean and maintain sufficient levels of oxygen The temperature fluctuations have a direct impact on feed consumption Achieving a good growth and FCR is directly linked to the choice of feed and
management practices.
Therefore, it is important that fish farming should be done in Winter months by following the advisory issued by the Fisheries Department which is as follows:
• Those who produce fish seeds should go for a shut down in September
• Those who rear Pangasius fish should take special care of its feed.
• Pangasius fish should be fed from 1.5 percent to 2, 3, 4, 5 and 6 percent of its total weight from the first to the sixth month.
• Pangasius fish feed should ideally contain 32 percent protein in the first two months, 28 percent protein in the next two months, 25 percent protein in the fifth month and 20 percent protein in the sixth month.
• If the temperature is less than 20 degrees and more than 36 degrees Celsius then the feed should be reduced by half
• If the pond water becomes too green, stop using chemical fertilizers and lime in the pond.
• If the green colour of pond water cannot be controlled, then mix 800 grams of copper sulphate or 250 grams of atrazine in 100 litres of water at the rate of half an acre and spray it in the pond during afternoon.
• In case of low oxygen level in the pond, spray oxygen enhancing tablet at the rate of 400 grams per acre.
• To increase the oxygen level in the pond, aerator can be run for two hours in the morning
and evening.
• Chemical fertilizers should not be used excessively in nursery pond.
• To increase the weight of fish, you can give 10 grams of mineral mixture, 2-5 grams of gut probiotics mixed with 30 ml of vegetable oil or any binder available in the market daily in every kilogram of feed.
• To protect the fish from infection in the pond, spray lime solution at the rate of 10-15 kg per acre every 15 days as per the pH value.
• To remove water contamination, spray 400 grams of potassium permanganate dissolved in water at the rate of per acre once a month.
• To protect fish from parasitic infection, spray salt at the rate of 40 kg per acre dissolved in water twice in the second month of the crop cycle. Mix 10 grams of salt in one kg of feed and feed the fish once a month.
Blogger:
Dr. Sathish Prasad
Senior Scientist – Aquatic Animal Health
Growel Innovation Center,
RS NO.57, Chevuru Village, Sriharipuram Panchayat, Mudinepalli Mandal, Krishna District – Andhra Pradesh India – 521329
Email: [email protected]