Review Reports

Round 1

Reviewer 1 Report

A relevant study of the endangered population of salmon obtained for a long period.  However, it is not clear what is the methodology that can be used in the studied river can  be used in other rivers with similar characteristic. Do the authors mean the use of traps and the recapture of stocked fishes or the multivariate analyses of the time series of fish population?

Author Response

Both questions have an affirmative answer; all the repopulated juveniles are marked by adipose fin ablation and/or microchip, and all returning salmon are controlled in the trap, so it is easy to obtain the percentage of adults that come from natural regeneration and those that come from restocking. Throughout the time series, the number of juveniles released into the river has been different, even in some years none have been released, so that the multivariate analysis of these variables has made it possible to establish which isthe best management system, which can be potentially used in riverswith similar characteristics, especially those located in southern areas of its natural distribution area, affected by dams and with areduced spawning habitat.