https://phys.org/news/2018-06-mexico-jaguar-population-years.html

That was a 20-percent increase from the first edition of the study, carried out in 2010.

"The presence of jaguars ensures that these ecosystems function, by controlling the population of herbivores, and is also an indicator of the ecosystems' good health," said Heliot Zarza, vice president of the National Jaguar Conservation Alliance, in a statement released by the World Wildlife Fund.