My turtle has a 13 pattern on its back. How old is he?

There are two ways to determine the age of a turtle. First, look at the belly spots of turtles in the sky. Every belly spot has a circular pattern, each circle represents a year (some have two or no circles), and how many circles represent is basically the same; Another way is to look at the carapace on the back (the so-called thirteen hexagons). Each shell also has rings, and the number of rings represents age.

Generally, it is calculated by the number of concentric rings on the tortoise shell shield. Every 1 cycle represents 1 growth cycle, i.e. 1 year. The number of concentric rings on the shield, plus 1( 1 year of birth), is the age of the turtle. This method can only be more accurate if the concentric ring pattern of tortoise shell is clear. For old turtles or turtles with fuzzy concentric rings, only their approximate age can be estimated.

Turtles grow relatively slowly. Under normal circumstances, the growth rate of female turtles is: the first year's turtle weight is about 15g, the second year's turtle weight is 50g, the third year's turtle weight is 100g, the fourth year's turtle weight is 200g, the fifth year's turtle weight is 250-250g, and the sixth year's turtle weight is about 400g. Male turtles grow slowly, and the maximum sexual maturity is generally less than 250 grams.

The age is calculated by the number of concentric rings (annual rings) on the tortoise shell shield, and one ring is an annual growth period. Of course, different turtle species, the clarity of ring marks and whether there are ring marks during hatching will also affect the accuracy of age. Turtles generally have a long life span, which can be as long as several decades. According to records, there is a kind of turtle whose life span exceeds 1.50 years, so it has the eternal reputation of "Millennium turtle, Millennium turtle".

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