To define how many years knocked to a favourite turtle, are possible in two ways: comparing armor length to standards, or having counted quantity of rings on an armor. However both that, and another options cannot yield absolute result as there is always some error.
It is required to you
- - Ruler;
- - table of a ratio of age and size of an armor.
Instruction
1. Option first. Measure length armorof turtles and be verified with the table of ratios of size of an armor and age. Water krasnoukhy cherepakhapervy year: 6 cm. The second year: male of 8 or 9 cm, samochka of 10 cm. The third year: male of 10 cm, samochka of 14-15 cm. The fourth year: male of 12-14 cm, samochka of 16 cm. The fifth year: a male of 15-16 cm, a female – 18 cm. The sixth year: male of 17 cm, female of the 20th smsukhoputny cherepakhapervy year: 5 cm. The second year: male of 6 cm, samochka of 7 cm. The third year: male of 8 cm, samochka of 9 cm. The fourth year: male of 10 cm, samochka of 10 cm. The fifth year: male of 12 cm, female of 12-13 cm. The sixth year: male of 14 cm, female of 14 cm
2. Option second. Count quantity of rings on a turtle armor. Consider that the first rings arise at early age, and up to two years it falls on every year of life a little, two-three, grooves. After this age in a year about one groove accrues. So the first four-six rings will fall on the two-year period.
3. Estimate whether the turtle fell into hibernation, whether it grew slowly, whether its food allowance was poor. If it is impossible to call conditions in which it contained good, add to the received number of years a year more - in bad living conditions or during periodic hibernations of a turtle grow more slowly.