Table 1.

(A) Exponential equations (with R2) and statistics of converging models for stable isotope incorporation in the plasma, RBCs, and muscle of caimans kept under controlled conditions. Nitrogen and carbon discrimination factors (Δ in ‰) and turnover rates (t50% and t95%) in days in different caiman tissues (δ13C calculated from the lipid-extracted diet sample and δ15N from the bulk, non-lipid-extracted diet sample). The two constant diet treatments were analyzed (C189 and R189). When the exponential model failed to significantly converge (FTC) for one diet, but the 95% turnover rate for the second diet was shorter than the duration of the experiment (189 days), I calculated the Δ at T189. (B) Effect of lipid extraction on the nitrogen and carbon isotopic values of the two diets (roach fish and chick).

Table 1.