The graph below shows the population figures of different types of turtles in India between 1980 and 2012. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

The line graph illustrates the

population

trends of four types of turtles in India from 1980 to 2012, with 1980 serving as the baseline index of 100.

Overall

, the Olive Ridley

turtle

population

experienced a significant increase over the 32-year

period

,

while

the Leatherback

turtle

population

steadily declined. The total

turtle

population

(all

species

) remained relatively stable with a slight upward trend,

whereas

the Green

turtle

population

fluctuated but showed a modest decline by the end of the

period

. In 1980, the

population

index of all

species

was set at 100, serving as a reference point. By 2012, the Olive Ridley turtles had shown the most substantial growth, peaking at an index of approximately 120.

Similarly

, the total

population

of all

species

increased moderately, reaching around 110 by the end of the

period

.

In contrast

, the Leatherback

turtle

population

exhibited a continuous decline. Starting at 100 in 1980, it gradually fell to just under 60 by 2012, making it the

species

with the most dramatic decrease. The Green

turtle

population

followed a more fluctuating pattern.

Although

it

initially

rose slightly above 100 in the mid-1990s, it eventually decreased to around 90 by the end of the

period

.