Inter-tissue variability in the stable isotope values of European perch (<i>Perca fluviatilis</i>) and pumpkinseed (<i>Lepomis gibbosus</i>)

Ecological studies on native and invasive populations of European perch Perca fluviatilis pumpkinseed Lepomis gibbosus are often based stable isotope (SI) analysis dorsal muscle, where samples usually taken from sacrificed fishes. However, other tissues, such as scale fin tissue, can be used non-lethal alternatives, their SI values standardised to muscle for comparative purposes. In both pumpkinseed, there was a pattern δ 13 C enrichment 15 N depletion scale. As must account these inter-tissue differences prior analyses, conversion equations data tissue provided.