Figure 3 in Trophic discrimination factors and stable isotope variability in a captive feeding trial of the southern rock lobster Jasus edwardsii (Hutton, 1875) (Decapoda: Palinuridae) in Tasmania, Australia

Figure 3. Isoplot showing the fit of different trophic discrimination factors (TDFs) to a wild population of Jasus edwardsii (■) and associated wild prey sources: Haliotis rubra (▲), Heliocidaris erythrogramma (■), and Lunella undulata (●), demonstrating that our experimentally derived TDFs provide the best fit. Black dots represent the isotope signatures of individual dorsal-muscle samples of lobsters. Mean and standard deviation values refer to the three source signatures with no TDF correction, with correction using multi-taxa TDFs from the literature (∆13C 0.4‰ and ∆15N 3.4‰ (Post, 2002)) and previously determined TDFs for J. edwardsii (∆13C 0.84‰ and ∆15N 3.28‰ (Suring & Wing, 2009)), with correction using our experimentally determined dorsal muscle TDFs (∆13C 4.45‰ and ∆15N 4.36‰), and correction with our experimentally determined leg muscle TDFs (∆13C 3.86‰ and ∆15N 5.05‰).