Although this represents the tiger's pampered life, which is very gratifying, it also worries some zoologists. Because tigers in zoos rarely have opportunities to move and grow so fat, some people worry that it will bring cardiovascular diseases to tigers.
In fact, tigers are unlikely to become so fat in nature, because the survival pressure in nature is their best diet medicine. Even in the case of adequate food, the tiger's weight will increase in a short time, but it will also increase the difficulty of hunting, so it is necessary to force the tiger to pay more exercise to catch its prey, so that its metabolism will be balanced and its weight will return to normal.
In the last century, a male adult Siberian tiger can grow to more than 300 kilograms in nature, but with the decrease of prey, the weight of the Siberian tiger is also decreasing. At present, the average weight is lower than Bengal tiger 10 kg.
However, among the existing six tiger subspecies, even the wild Siberian tiger without weight advantage is the fattest tiger!
This is because the winters in Northeast China and Siberia are extremely cold, often entering the low temperature of minus 30 degrees. The Siberian tiger must increase its body fat thickness to keep out the cold. So as soon as they enter autumn, they will begin to gain weight, and the fat content will increase with the increase of eating frequency. It is said that the body fat rate of Siberian tiger will reach 10% or even 20% in winter!
However, the body fat rate of Bengal tigers living in the South Asian subcontinent has not changed significantly within one year, with an average of only 7-8%. It can be seen that the climate has a great influence on the body fat content of tigers.
Therefore, the Siberian tiger, which lives in the highest dimension, has become the fattest tiger species in the world because of the climate in its living area.