Tilapia culture species There are currently 15 species of tilapia cultivated in the world. The species cultured in China mainly include Mozambique tilapia, Nile tilapia, and longevity fish. 1. The maximum weight of Mozambican tilapia can reach 600-700 grams. The product specification requires 100-250 grams. It is smaller than the individuals of Nile tilapia and Blessing fish and grows slowly. In the non-reproductive season, the body color is dark gray, and there are 6-7 black vertical bands on the body side of juvenile fish. As the fish grows, the vertical stripes gradually become invisible; in the breeding period, the male fish is black Green, dorsal fins, anal fins, and caudal fins are clearly red on the edge, and the female body is gray-yellow. There are 6-7 black vertical bands on the body side of juvenile fish, which gradually becomes inconspicuous as the fish grows. 2. Nile tilapia, which is larger than the individuals of Mozambique tilapia, can weigh up to 5.5 kg in the country of origin, grow fast, and stock up to 12 centimeters in size. The first anniversary of tilapia can reach 700 g. The body is yellow-brown and silvery on the abdomen. There are 8-10 black vertical bands on the side of the body and the dorsal fins are black. The edge of the anal fins and caudal fins of the males are clearly reddish in life, and there are 8-10 lifetimes on the caudal fins. Vertical black stripes. 3. The S. frugiperda is a descendant of the cross between female Nile tilapia and male Mozambique tilapia. Morphologically similar to Nile tilapia, the body color is usually blackish green, maturing 100-150 days after hatching, and begins to multiply, with omnivorous fish dominated by phytoplankton and small debris. The production performance is good, the body weight can be more than 1 times of the female parent, 20% larger than the male parent, the large individual can grow to 1-2 kilograms, the fastest growing within 300 grams, gradually slowing down later, so in 150-200 grams Can be listed on the market.
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