Appendix 1

Sampling data: date, site, depth, and mesh size of gillnets used. The sites were: (1) Malalhuaca (MH), located in the trout farm area, at c. 900 m from the nearest one; (2) Cola Limay (CL), 1500 m upstream of (southward) the southernmost farm; and (3) Coloradas Fondo (CF), 25 km downstream (northward) from the northernmost farm.

Date Site Depth (m) Bar mesh size (mm)
February 2012 –, MH, − <4, 20, 40 15, 20, 30, 50, 60, 70 (10 m length each)
March 2012 CL, MH, CF <4, 20, 40 15, 21, 25, 30, 35, 38, 52 (25 m length each)
April 2013 CL, MH, CF <4, 20, 40 15, 21, 25, 30, 35, 38, 52 (25 m length each)
March 2014 –, MH, CF <4, 10, 30, 40, 50 15, 20, 30, 50, 60, 70 (10 m length each)

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