Fifty years of spring censuses in black grouse (<i>Lyrurus tetrix</i>) in the High Fens (Belgium): did the rabies vaccination has a negative impact on a fox prey population?

Nevertheless, if we removed the single exceptionally high value observed in 2011, the differences became highly significant (Fig. 3 b, c; Suppl.

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This allows us to confirm the suspicion that the time series is stationary between 1967 and 1993, then manifests a decreasing trend.

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