for Euclidean surface-area increase. (a) All data (slope ±95% CI: 2.93 ±0.73), (b) Chordata (slope ±95% CI: 4.65 ±2.18), (c) Cnidaria (ns), (d) Ctenophora (slope ±95% CI: 5.16 ±3.40), (e) Arthropoda (slope ±95% CI: 3.00 ±1.15). The observed positive trends through the empirical data are opposite to the negative slopes predicted by resource transport network models (see Fig. 2). Fig. 4. Comparisons between the ontogenetic scaling exponents for N-excretion (bN) and for (bR) across individual species of diverse pelagic invertebrates. Error bars (±SE) are derived from or estimates for single species between studies. The solid line depicts the bR bN RMA regression of against values (bN = 1.052 (bR) - 0.0235; = 0.307; p = 0.00034). bN bR r2 The dashed line indicates a 1:1 relationship. Fig. 5. Molar ratios of dioxygen consumed to nitrogen excreted (O2:N) versus body mass in pelagic invertebrate species (n = 24). Each line represents data from a single species as given within a single study, in which both respiration and excretion had been determined and r ≥ 0.8. Results are divided between those in which excretion was measured as ammonia (NH3) or ammonium ions (NH4+), and between laboratory-cultured or field-collected animals (see key). Dotted horizontal lines represent the molar O2:N ratios corresponding to catabolism based entirely on protein (3), versus equal catabolism of protein and lipid (60) (after Mayzaud and Conover, 1988).
for Euclidean surface-area increase. (a) All data (slope ±95% CI: 2.93 ±0.73), (b) Chordata (slope ±95% CI: 4.65 ±2.18), (c) Cnidaria (ns), (d) Ctenophora (slope ±95% CI: 5.16 ±3.40), (e) Arthropoda (slope ±95% CI: 3.00 ±1.15). The observed positive trends through the empirical data are opposite to the negative slopes predicted by resource transport network models (see Fig. 2). Fig. 4. Comparisons between the ontogenetic scaling exponents for N-excretion (bN) and for (bR) across individual species of diverse pelagic invertebrates. Error bars (±SE) are derived from bR or bN estimates for single species between studies. The solid line depicts the RMA regression of bN against bR values (bN = 1.052 (bR) - 0.0235; r2 = 0.307; p = 0.00034). The dashed line indicates a 1:1 relationship. Fig. 5. Molar ratios of dioxygen consumed to nitrogen excreted (O2:N) versus body mass in pelagic invertebrate species (n = 24). Each line represents data from a single species as given within a single study, in which both respiration and excretion had been determined and r ≥ 0.8. Results are divided between those in which excretion was measured as ammonia (NH3) or ammonium ions (NH4+), and between laboratory-cultured or field-collected animals (see key). Dotted horizontal lines represent the molar O2:N ratios corresponding to catabolism based entirely on protein (3), versus equal catabolism of protein and lipid (60) (after Mayzaud and Conover, 1988).