Multi-scale effects of nestling diet on breeding performance in a terrestrial top predator inferred from stable isotope analysis.

We found, however, a significant and negative correlation between mean productivity in the whole population-year and the SEA c ( r s = −0.86, P = 0.014), and a marginally significant negative correlation between mean productivity and the SDNND b ( r s = −0.72, P = 0.068), suggesting that those population-years with more heterogeneous territories in terms of diet were less productive than population-years with territories showing more homogeneous prey consumption patterns ( Figure 5 ).

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