Population status and ecology of the <i>Salmo trutta</i> complex in an Italian river basin under multiple anthropogenic pressures.

In addition, the comparison of average current speed values detected in the different periods in the sites in which the trout were sampled revealed a marked, highly significant decreasing trend over time (Figure 5b ).

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RESULTS The air temperature values (years 1951–2016) showed an increasing trend over time for both meteorological stations (Figure 3 ).

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