Brazilian bran (South American carp), scientific name Prochilodus scrofa, belongs to Polygonaceae, and is a new type of freshwater aquaculture imported from Brazil in 1997. The Guangxi Fisheries Research Institute was also introduced into aquaculture in 1998 and has now been artificially propagated successfully. Brazil bran has strong adaptability, fast growth, wide appetite, strong disease resistance, easy catching, delicate meat, and high economic value. It is a new breed of freshwater breeding with potential for promotion.
1. Biological characteristics Brazil bran is native to lakes and reservoirs in Brazil, Argentina and other countries in South America and is one of Brazil's main freshwater economic fishes. Brazilian oysters are hot-water fish that live on the bottom of the body of water. It is flat on its side, similar to scorpions, scorpions and squid. Its body color is white and silver, and its tail is forked. Adult fish is generally 30 cm long. Brassica olivaceus is omnivorous, partial plant food, low water quality, low oxygen tolerance, pH value of 6.0-7.5, critical water temperature upper limit of 39°C, lower limit of 9°C, optimal growth water temperature of 26-30°C, water temperature lower than 20 °C loss of appetite.
2. Breeding techniques (1) Pond conditions. The conditions of pond culture in Brazil are not strict, and generally ponds for rearing four home fish or small ponds in the countryside can be cultured. Area 0. 5-5 acres, maximum of 10 acres, water depth 1.2-1.8 meters. The best choice for ponds is in areas where there is sufficient water, fresh water, drainage and irrigation, and no pollution. Conventional clear pond fertilizer and water treatment before stocking.
(2) Fish stocking. The stocking time of Brazilian roe deer is early May, and it is best to disinfect the fish before stocking. Generally, 1,000-1200 species of overwintering fish are stocked per acre. In order to make full use of water space, about 200 species of flowers and white bream species can also be stocked; if the species of summer fish is stocked, the stocking quantity per acre is 1200-1400. Put 100 species of flowers and white fish. After 4-5 months of feeding, the body weight can reach 0.35-0.5 kg.
(3) Feed and feed. The Brazilian quail is a vegetative omnivorous fish. The larval stage mainly feeds on rotifers, cladoceros and copepods, and also ingests some green algae and diatoms. A little later, ingest aquatic insect larvae, leeches, etc. There are many recipes for the adult fish stage. They eat a variety of planktonic, undergrowing and attached algae, organic debris, and eat some animal foods such as alfalfa and aquatic insects. Under artificial feeding conditions, rice bran, bean cake, peanut cake, etc. can be fed, and artificial pellet feed can be fed conditionally. The amount of feed can refer to the amount of feeding and feeding ratio of the farmed fish.
(4) Water quality management. Similar to the general requirements for the management of farmed fish water quality.
1. Biological characteristics Brazil bran is native to lakes and reservoirs in Brazil, Argentina and other countries in South America and is one of Brazil's main freshwater economic fishes. Brazilian oysters are hot-water fish that live on the bottom of the body of water. It is flat on its side, similar to scorpions, scorpions and squid. Its body color is white and silver, and its tail is forked. Adult fish is generally 30 cm long. Brassica olivaceus is omnivorous, partial plant food, low water quality, low oxygen tolerance, pH value of 6.0-7.5, critical water temperature upper limit of 39°C, lower limit of 9°C, optimal growth water temperature of 26-30°C, water temperature lower than 20 °C loss of appetite.
2. Breeding techniques (1) Pond conditions. The conditions of pond culture in Brazil are not strict, and generally ponds for rearing four home fish or small ponds in the countryside can be cultured. Area 0. 5-5 acres, maximum of 10 acres, water depth 1.2-1.8 meters. The best choice for ponds is in areas where there is sufficient water, fresh water, drainage and irrigation, and no pollution. Conventional clear pond fertilizer and water treatment before stocking.
(2) Fish stocking. The stocking time of Brazilian roe deer is early May, and it is best to disinfect the fish before stocking. Generally, 1,000-1200 species of overwintering fish are stocked per acre. In order to make full use of water space, about 200 species of flowers and white bream species can also be stocked; if the species of summer fish is stocked, the stocking quantity per acre is 1200-1400. Put 100 species of flowers and white fish. After 4-5 months of feeding, the body weight can reach 0.35-0.5 kg.
(3) Feed and feed. The Brazilian quail is a vegetative omnivorous fish. The larval stage mainly feeds on rotifers, cladoceros and copepods, and also ingests some green algae and diatoms. A little later, ingest aquatic insect larvae, leeches, etc. There are many recipes for the adult fish stage. They eat a variety of planktonic, undergrowing and attached algae, organic debris, and eat some animal foods such as alfalfa and aquatic insects. Under artificial feeding conditions, rice bran, bean cake, peanut cake, etc. can be fed, and artificial pellet feed can be fed conditionally. The amount of feed can refer to the amount of feeding and feeding ratio of the farmed fish.
(4) Water quality management. Similar to the general requirements for the management of farmed fish water quality.
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