The line graph illustrates the population changes of three specific turtle species in India between 1980 and 2012, using an index where 1980 equals 100. Overall, the population of Olive Ridley turtles grew substantially, whereas the other two species faced declines.
Olive Ridley turtles began at an index of 100 in 1980 and experienced a consistent upward trend, peaking at 137 in 1998 and 2002, before finishing at 130 in 2012. In contrast, Leatherback turtles saw a sharp decline after 1986, when they reached a high of 113. By 2000, their index had dropped to 71, and they remained relatively stable at a low of 58 by the end of the period.
Green turtles fluctuated more noticeably. After an initial rise to 108 in 1982, they experienced volatility, dropping to 86 in 2002. Although they recovered slightly to 95 in 2010, they ended the period at 90. The 'All species' category remained relatively stable, hovering between 100 and 112 throughout the three decades, reflecting the balancing effect of the differing trends among the individual species.