Figure 1.

Age-Specific Patterns of Recruit Production in Female Mauritius Kestrels

Filled black circles, text, and lines represent the 0% agriculture group; gray triangles, text, and lines represent the >30% agriculture group. Each data point shows the age-specific mean recruit production ± SE. Note that points are offset slightly to avoid overlap between the agriculture groups. Dashed lines indicate nonsignificant trend. Sample sizes are shown at top of (B). The surface in (A) was generated from the statistical model described in the text and shown in Table S1A. The curves in (B) were generated from the generalized additive model (GAM; 0% natal agriculture group: χ²₂ = 0.703, p = 0.704; >30% group: χ²_2.437 = 8.550, p = 0.040). The age of peak recruit production in the >30% agriculture group based on the GAM is shown by the arrow in (B). (C) shows age-specific recruit production prior to the peak, and (D) shows age-specific recruit production after the peak; the curves in both plots were generated from statistical models described in the text.