Isotopic fractionation in wild and captive european spiny lobsters (Palinurus elephas)
MetadataShow full item record
AuthorsDeudero, S. (Salud); Tor, A. (Ariadna); Díaz, D. (David); Mallol, S. (Sandra); Goñi, R. (Raquel)
stable isotope fractionation
Differences in tissue specific fractionation have important practical implications for ecological studies. We have examined isotopic fractionation δ13C and δ 15N among four different tissues in the spiny lobster Palinurus elephas (Fabricius, 1787). Two sets of individuals differing on diet-quality (captive animals with monospecific diet and wild lobsters) were studied to determine the best tissue to be used as a proxy of feeding ecology: muscles of the pleon, muscles of the legs, telson, and hemolymph. We observed significant differences in isotopic fractionation δ 13C and δ 15N among the analyzed tissues. In both captive and wild specimens leg muscle was the most δ 15N enriched tissue, followed by pleonal muscle, hemolymph, and telson. For δ13C the sequence in isotopic discrimination was pleonal muscle > leg muscle > hemolymph ≈ telson. Lower intra-individual variability was observed in captives compared to wild individuals, as expected from a constant diet. Finally, we conclude that ...