In December 2012, as part of the wider effort to halt the declining number of Arctic charr in Llyn Padarn, Natural Resources Wales began a programme to harvest Arctic charr eggs and seminal fluid (milt). The fish were caught at their spawning beds in the Afon y Bala, at the top of the lake, using fyke nets

After being incubated in tanks with critically controlled water temperature for around three months and then reared at the Mawddach hatchery near Dolgellau; around 5700 young fish were transported back to Llyn Padarn in October 2013 to be released.

This work has continued on an annual basis and sonar monitoring undertaken by NRW indicates that the number of Arctic charr in Llyn Padarn is increasing.