Table 6.

Mean (± SEM) test and spine organic matter (%) of Lytechinus variegatus fed diets with varying protein and carbohydrate levels, protein: energy ratios (P: E), total energy (TE), and protein: carbohydrate ratios (P: C). P: E represents mg of protein per kilocalorie. TE represents total dietary energy in calories per gram. P: C represents protein: carbohydrate ratio in mg per mg.

Protein (%)	Carbohydrate (%)	P: E (mg P kcal−1)	TE (cal g−1)	P: C (mg mg−1)	Test Organic Matter (% dry weight)	Spines Organic Matter (% dry weight)
12	39	39.3	3075	0.31	12.36 ± 0.34	10.04 ± 0.29
12	30	44.3	2728	0.40	12.78 ± 0.19	10.02 ± 0.22
12	21	50.8	2380	0.57	12.16 ± 0.28	10.92 ± 0.32
19	39	54.9	3478	0.49	14.26 ± 2.03	10.65 ± 0.42
19	30	60.9	3131	0.63	14.54 ± 0.42	10.97 ± 0.25
19	21	68.6	2783	0.90	14.01 ± 0.22	11.43 ± 0.34
28	30	76.9	3647	0.93	13.23 ± 0.24	10.28 ± 0.42
36	21	95.6	3749	1.71	13.51 ± 0.16	11.40 ± 0.38