The original common carp was found in the inland delta of the Danube River about 2000 years ago, and was torpedo-shaped and golden-yellow in colour. As you would imagine from their name, grass carp eat plenty of aquatic plants, primarily weeds, but will also feed on invertebrates and molluscs. Grass carp is a native Chinese freshwater fish with a broad distribution from the catchment area of the Pearl River in southern China to that of the Heilongjiang River in northern China. 1.0% If populations are sufficiently high, grass carp tend to stimulate phytoplankton blooms that reduce water clarity. The global value of global grass carp aquaculture production was US$ 2.92 billion in 2002, an annual expansion rate between 1993 and 2002 of 7.5 per cent/yr. Zhejiang Provincial Freshwater Fisheries Research Institute, Huzhou City, Zhejiang Province, China. Compared to common carp, the culture of grass carp started much later. However, appropriate processing technology is required for the fish to enter international markets. Objectif en calories 1,887 cal. Grass carp are used to control vegetation in ponds and alter the ecosystem of ponds. Grass carp goes through a transition from carnivory to herbivory during its life cycle. The technique for fingerling rearing is rather different to the nursery operation, especially when grass carp are stocked as the major species. INU02, INU2, and MOS2 significantly improved relative weight gain, specific growth rate, protein efficiency ratio, and food conversion ratio of grass carp fed with food waste-based diet. The period can be considerably shortened in warmer climates or if lower stocking densities are used. Grass carp normally dwell in mid-lower layer of the water column. All the fish are harvested at the end of the year, either for marketing or for restocking (individuals below marketable size) for the next production cycle. Cages are usually about 60 m², with a depth of 2-2.5 m. 250-500 g fish are stocked at 10-20/m³, depending on the targeted production. The nursery operation usually takes 2-3 weeks in China. Individuals of marketable size are selected after netting (a single netting for each harvest). Handling and processing Grass carp is normally sold live or fresh. Grilled Grass Carp will provide 5 index points after the recipe has been cooked and consumed. The fish is mainly fed with soybean powder, rice bran, maize powder and aquatic plants (Azolla sp.) If you have not witnessed this scene, big grass carp cruise the surface with their mouth open, literally vacuuming dozens of floating fish food … Harvesting techniques Both selective and total harvesting are practiced for grass carp. This total and lilies either hot or cold water from natural water bodies, especially developing countries also at! Flowing water are necessary for induced spawning in tanks - grass cultivation pig... 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