Figure 2 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 2. Change in mean (± SE) isotopic signatures over time for captive Jasus edwardsii in three diet treatments: sea urchin (●), fish (▲), and mussel (■). Plots show change in δ13C (A) and change in δ15N (B). Solid lines represent lobster muscle tissue as represented by a leg-muscle icon, and dashed lines represent lobster exoskeleton as represented by a red-leg exoskeleton icon. Dotted lines represent the mean diet isotope + trophic discrimination factor (TDF) calculated as of 12 months. All mean values have a minimum sample size of five replicates except for the following samples: 4-month mussel (N = 4), 18-month fish (N = 4), and 18-month mussel (N = 3). For lethal samples (initial, 12, and 18 monts), exoskeleton samples are the mean of leg and dorsal samples where both were collected. Exoskeleton samples are only leg samples for non-lethal samples.