Table 2.

Model parameters ± standard error from one-compartment isotopic incorporation rate models predicted for the freshwater shrimp Macrobrachium borellii

Tissue	Isotope	n	Model	r2 for model fit	Mean residence time τ (d)	Elemental turnover rate λ (d-1)	Equilibrium Value δ∞	Discrimi-nation factor Δ (‰)
H	13C	47	-15.47 -(6.7)e-0.038t	0.88***	26.3 ± 4.3	0.038 ± 0.006	-15.47 ± 0.36	0.7 ± 0.36
H	15N	47	17.38 -(4.73)e-0.063t	0.70***	16.6 ± 5.51	0.063 ± 0.020	17.38 ± 0.43	1.7±0.43
M	13C	48	-16.19 -(4.95)e-0.0132t	0.78***	75.8 ± 25	0.0132 ± 0.004	-16.19 ± 0.83	-0.1 ± 0.83
M	15N	48	19.3 -(1.74)e-0.023t	0.59***	40.0 ± 25	0.023 ± 0.013	19.3 ± 0.42	3.6±0.42

M = muscle tissue, H = hepatopancreas tissue, n = sample size. * = P < 0.001.