Stingrays are often raised in polyculture systems alongside other aquatic species in ponds. A common practice involves stocking 3-5 cm long stingray fry directly into the pond, allowing them to grow naturally without separate feeding. There are two primary methods for raising stingrays in traditional fish ponds. The first approach is to introduce stingrays into ponds that already contain sturgeon or similar species. In this case, stingrays with a length of over 3 cm are stocked at a rate of about one per mu (approximately 667 square meters), and they are not fed separately. The second method is used in ponds without squid or other similar species, where 500–600 stingrays of more than 3 cm in length are stocked per mu.
In recent years, some farmers have successfully integrated stingrays into shrimp farming ponds. Green shrimp larvae serve as an ideal food source for stingrays. This co-cultivation system helps improve the size and quality of shrimps that emerge during the culture period, and can even result in multiple generations of shrimps within a single cycle. However, it's important to maintain strict control over stingray stocking density, keeping it below 100 tails per acre to avoid overcrowding and ensure optimal growth conditions.
The pond environment must be clean and free from contaminants. It should also have proper escape-proof structures to prevent stingrays from leaving. The water pH should be between 7 and 8.5, and dissolved oxygen levels need to stay above 4 mg/L. Natural food sources such as plankton, water silk, small fish, and aquatic insects should be abundant to support the stingrays' nutritional needs.
Regarding stocking density, it depends on the availability of feed. In commercial fish ponds where artificial feed is provided, around 300 stingray fry per acre can be raised, leading to a harvest of 10–15 kg of stingrays. In ponds without carp or other competing species, 500–600 stingrays per mu can be raised, yielding 20–30 kg of stingrays. The stingrays should be at least 3 cm in length when stocked.
Daily management is crucial for successful stingray farming. Maintaining good water quality is essential, especially ensuring that dissolved oxygen levels remain above 4 mg/L. Preventing escapes by securing pond boundaries is also important. Farmers should be cautious when using medications to treat other fish diseases, as these may negatively affect the growth of stingrays. Regular monitoring and careful attention to environmental conditions will help maximize yield and promote healthy development.
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