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Small reservoir fish farmer raising grass carp, carp
In fish farming operations, grass carp and grouphead bream should make up 40-50% of the total stocking volume, while common carp accounts for 20-30%, and other carp species together take up 10%. The fish should be of a size between 100-200 grams per individual. Stocking is typically done in winter after adult fish have been harvested, allowing the newly stocked fish to quickly adapt to the reservoir environment. In spring, stocking usually occurs after the seasonal thaw, when the reservoir can take advantage of dry periods for maintenance tasks such as disinfection, cleaning, and land preparation.
The recommended stocking density is 3,000 to 3,750 kg per hectare. For feeding, reservoirs can use either compound feed alone or a combination of compound and green feed. The daily feeding amount should be adjusted based on water temperature and fish growth rates. Compound feed can be calculated using standard feeding tables used in cage aquaculture, and should be fed at fixed times and locations. Green feed should be provided at 1.5-3.0% of the total weight of herbivorous fish and placed in designated feeding boxes. It's generally fed once in the afternoon, while compound feed is given twice daily—at 8-9 am and 2-3 pm.
Effective production management includes thorough disinfection and cleaning of the reservoir before fish stocking to improve survival rates. Regular checks of fish escape prevention systems are also essential. Small reservoirs often face conflicts with irrigation needs, especially during drought years. Water allocation must be carefully managed, including determining the minimum water level required for fish culture and scheduling pumping activities. In emergency situations, fish relocation or water transfer may be necessary to ensure smooth production and sustainable aquaculture practices.