Isotope_ratios

Stable isotope ratios in blood cells and plasma per bird per bleeding session

Bleeding_sessions

Dates of the collection of the blood sample

Diet_per_ID

Diet (prey species) offered per individual bir

Body_masses

Body masses of the experimental bird

Isotope ratios <i>δ</i>¹³C (upper panels) and <i>δ</i>¹⁵N (lower panels) throughout the experiment in blood plasma (left panels) and red blood cells (right panels).

<p>Individual measurements are connected, diets are given in legend (upper right panel), and thicker lines denote nonlinear mixed-effect model fits (plasma only; model fits failed to converge for red blood cells).</p

Parameter estimates for the one-compartment exponential decay function fitted to the plasma stable isotope ratios (± SE).

<p><i>δ</i>(0) is the isotope ratio at the start of the experiment, <i>δ</i>(∞) is the asymptote of the isotope ratio, and <i>λ</i> is the instantaneous incorporation rate of the element.</p

Daily body mass throughout the experiment.

<p>Individual data are connected and diet is given in legend. Thick straight line represents mixed-effect model fit.</p

Discrimination of <i>δ</i>¹³C and <i>δ</i>¹⁵N from food (at arrow base) to plasma (at arrow head), plotted for the two diet groups separately.

<p>Bars represent 95% confidence intervals.</p

Appendix A. The method used for extracting functional response parameters from studies on avian herbivores.

The method used for extracting functional response parameters from studies on avian herbivores

Appendix B. The method used for extracting daily feeding times from studies on avian and mammalian herbivores.

The method used for extracting daily feeding times from studies on avian and mammalian herbivores