Discrimination factors versus tissue isotopic composition.

<p>Data is shown for (a) nitrogen (ΔN vs. δ¹⁵N, n = 126) and (b) carbon (ΔC vs. δ¹³C, n = 111 ). Solid line represents a significant linear regression relationship for nitrogen (ΔN = 0.574×δ¹⁵N–3.32; r² = 0.226; F_[1,124] = 36.23, p<0.001). There was no relationship for carbon (r² = 0.005; F_[1,109] = 0.0569, p = 0.452).