California removed 44,000 trout to help endangered frog populations recover

The record

Written from the 1 report below. Nothing here is unsourced.

Conservationists at Sequoia and Kings Canyon National Parks removed nearly 44,000 non-native trout from 19 high-elevation lakes between 2001 and 2011.
Non-native trout were introduced to these historically fishless habitats for recreation, but they became predators that caused native frog populations to collapse.
Surveys in three of the restored lakes recorded a population increase from 190 to over 18,800 frogs and tadpoles.
Restoring these ecosystems helps native amphibians better withstand other environmental threats like disease.

1 report

English national1

All filed from India

Named United States · Mountain yellow-legged frog · National Park Service · Sequoia and Kings Canyon National Parks · Sierra Nevada

The 1 report is listed beside the record.

Answers cite the reports above, or say they can't.