Stable isotope signatures and trophic‐step fractionation factors of fish tissues collected as non‐lethal surrogates of dorsal muscle

Abstract

Scales and fin tissue are strong surrogates of dorsal muscle in food web studies as they can provide estimates of muscle values within an acceptable level of error when species-specific methods are used. Their derived fractionation factors can also be applied to models predicting fish diet composition from δ(15) N and δ(13) C values.