The graph illustrates the population trends for four types of turtles in India (Leatherback, Olive Ridley, Green, and all other species) from 1980 to 2012, using an index of 100 units based on their 1980 populations.
Overall, Leatherback Turtles exhibited an upward trend despite some fluctuations, while Olive Ridley Turtles experienced a sharp decline. In contrast, Green Turtles and other species displayed relatively stable populations with minimal changes over the period.
In 1980, the population of Leatherback Turtles was indexed at 100 units. This figure rose steadily, peaking at approximately 140 units before declining slightly to around 130 units by 2012. Conversely, Olive Ridley Turtles initially increased to 110 units in 1987 but then experienced a significant decline, falling to nearly 60 units by the end of the period, making them the least populous in 2012.
Green Turtles and all other species started at the same baseline of 100 units in 1980. Green Turtles displayed minor fluctuations, with their population dropping slightly to just below 90 units by 2012. Similarly, the population of all other species showed minimal variation, ending at roughly 110 units after a slight increase over the 32-year period.