Scatter Plot from Scientific Research

Carbon (13C) and nitrogen (15N) isotope values of females (purple triangles, 1983–2007) and males (yellow circles, 1962–1982; yellow diamonds, 1983–2006). Note that the upper temporal limit for the stable isotope analysis of males is shorter than for their morphometric analysis. Ellipses represent the size-corrected standard ellipse area (SEAC), including 95% of the data. The yellow dashed and continuous ellipses represent the SEACof males collected between 1962 and 1982 and 1983 and 2006, respectively. Purple ellipse represents the SEACof females.

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