The living habits of tilapia

Abstract: tilapia has a strong ability to adapt, can reproduce in narrow waters, can even grow in rice fields, and has strong adaptability to water with less dissolved oxygen. Most tilapia are omnivorous and often draw plants and fragments. Let's take a detailed look at the living habits of tilapia.

Tilapia has a strong ability to adapt, can reproduce in small areas of water, and even grow in rice fields, and has a strong adaptability to water with less dissolved oxygen. Most tilapia are omnivorous and often draw plants and fragments in water. Let's take a detailed look at the living habits of tilapia.

Tilapia is omnivorous.

Tilapia is a plant-based omnivorous fish. For tilapia in the pond, most of the contents in the digestive tract are organic detritus and other plant feed (such as aquatic plants, commercial feed, etc.), followed by phytoplankton, zooplankton and a small number of benthos.

Tilapia is a hypoxia tolerant fish.

Tilapia has a strong tolerance to hypoxia, the asphyxiation point is 0.07-0.23 mg / L, and tilapia can still live and reproduce when dissolved oxygen in water is 1.6 mg / L. When the dissolved oxygen in water is more than 3 mg / L, the growth is not affected.

Tilapia is not tolerant to low and high temperatures.

The living temperature range of tilapia is 15-35 ℃. Tilapia is dormant when the water temperature is below 15 ℃. The highest critical temperature of tilapia is about 40-41 ℃, the optimum growth temperature is 28-32 ℃, and the reproduction temperature of tilapia is above 20 ℃.

Tilapia has strong reproductive ability.

Tilapia has the advantages of early sexual maturity, short spawning cycle, oral hatching, low reproductive conditions and natural reproduction in static water with large water area. When tilapia reached sexual maturity in 6 months, the female fish weighing about 200 grams carried about 1000 to 1500 eggs. During breeding, the male fish had a beautiful color of marriage smoke, with two mouths of anus and genitourinary foramen in the abdomen, and white semen flowing out of the squeezed abdomen. There are three holes in the abdomen of female fish, namely anus, genitourinary foramen and urinary pore. The water temperature is 1832 ℃, and the mature male fish has the ability of "digging nests". The mature females enter the nest to pair, produce mature eggs and immediately contain them in the mouth, fertilize the eggs, and the fertilized eggs develop in the female's mouth. The young fish can be hatched at the water temperature of 25 ~ 30 hours and 4 ~ 5 days. The young fish leave the mother when the yolk sac disappears and has a certain ability.