Inter-tissue variability in the stable isotope values of European perch (Perca fluviatilis) and pumpkinseed (Lepomis gibbosus)Irmak Kurtul, Ali Serhan Tarkan and J. Robert BrittonKnowl. Manag. Aquat. Ecosyst., 424 (2023) 22DOI: https://doi.org/10.1051/kmae/2023018