Lipid Correction for Carbon Stable Isotope Analysis of Yellowfin Tuna

Carbon stable isotopes (δ13C) are widely used in ecological studies to understand diet, food web dynamics, and movements of marine fishes. Still, δ13C is influenced by lipid content often requires chemical extraction or mathematical correction. Here, we developed a species-specific correction for white muscle tissue yellowfin tuna (Thunnus albacares), highly migratory finfish considerable economic value. Lipid was conducted on (C:N range: 2.96–6.49), both linear non-linear models were fitted assessed. increased δ13C, lesser extent, δ15N values tissue, but had no effect δ34S. Both provided better fits the data than model, suggesting an asymptotic relationship between C:N ∆δ13C. Results support growing body evidence that ratios can be predict corrected highlight value approaches. We provide parameter estimates analysis similar species which have yet developed.