Maoming Yuantian Aquatic Products Co.,Ltd
add:Xiangshan Shenchong Industrial Zone, Shigu County, Gaozhou city, Guangdong, China
Technique of culturing tilapia in Guangdong:
Guangdong tilapia native to africa. A local how to eat carp, therefore also some people call it a "how to eat carp in africa". At present our country farming the main Nile tilapia, tilapia, Oreochromis aureus in Mozambique. Tilapia with a mixed diet, hypoxia tolerance, tolerance to low temperature is not strong, propagation:
1, a mixed diet: Guangdong tilapia is plant-based omnivorous fish. Tilapia in pond, gut contents mostly organic debris and other plant feed (such as water grass, commercial feed and so on), followed by phytoplankton, zooplankton and small benthic animals.
2, resistant to hypoxia: Guangdong tilapia hypoxia resistant ability is very strong, asphyxia point is 0.07 to 0.23 mg / L, the oxygen in water of 1.6 mg / L, Guangdong tilapia can still live and breed. The oxygen in the water more than 3 mg / L, growth was not affected.
3, not resistant to low temperature: the survival temperature range Guangdong tilapia was 15 - 35 ℃. When the water temperature is below 15 ℃, tilapia dormant. Guangdong tilapia high critical temperature about 40 ℃ －41 ℃, the optimum growth temperature was 28 ℃ - 32 ℃, tilapia breeding temperature at 20 ℃.
4, breeding strong: Guangdong tilapia early sexual maturation, spawning cycle short, oral incubation juvenile, reproductive condition requirements is not high, the static water area of natural reproduction. Tilapia 6 months reached sexual maturity, weight 200 grams of female fecundity number during breeding in the 1000 - 1500 eggs. Males have marriage, color beautiful, abdominal anal and urogenital hole two, squeezing the abdomen white semen, females abdomen with 3 holes, i.e. the anus and genital pore and urinary pore. The water temperature of 18 ℃ - 32 ℃, mature males have "dig nest" ability, mature females nest matching, output of mature eggs and immediately be contained in the mouth, make ovum fertilization, zygote development in females in the oral cavity, the water temperature 25 ℃ - 30 4~5 days hatched juveniles. The mother left the juvenile to yolk sac disappeared and has a certain capacity.
Guangdong tilapia breeding method:
1, the fish pond trimming. 7 - 10 days fish stocking, remove dry pond water, carefully cleaned, and with lime splashed disinfection. Lime dosage is 150 Jin per mu. Inlet and outlet with gauze or a cloth blocking.
2, plunged fingerling. After March, when the water temperature rose to 18 degrees or above, began stocking. Mainly to tilapia stocking ponds, with per mu to put 2 - 3 inch fish 2000 - 3000 and silver carp and Bighead Carp and grass carp tail; polyculture pond, Mu put above specifications tilapia fingerlings 1000 - 1500 tail.
3, the feed. The content of crude protein feed to be about 25%. Feeding tilapia batch or wheat bran, rapeseed cake can be, every morning and afternoon feeding time. The feeding quantity, species grow to half day two, throwing fish weight 7%; half changed after 5%.
4, the harvest. Feeding 100-120 days can harvest, more than 70% individual up to 1 more than jin. Commercial fish less than 800-1000 Jin per mu.