Diet component |
δ15N |
δ13C |
mg N g-1 |
mg C g-1 |
C:N |
Trial |
1Natural feed |
Phytoplankton |
6.88 ± 0.09 |
-21.59 ± 0.03 |
39.8 ± 0.74 |
214 ± 1.1 |
6.27 ± 0.2 |
1 |
Zooplankton |
11.2 ± 0.11 |
-20.62 ± 0.73 |
61.6 ± 0.4 |
245 ± 2.7 |
4.65 ± 0.2 |
1-3 |
Algal-flocs |
6.70 ± 0.04 |
-22.59 ± 0.10 |
42.3 ± 0.53 |
207.1 ± 0.54 |
5.7 ± 0.06 |
1-4 |
Micro-flocs |
4.81 ± 0.50 |
-22.64 ± 0.66 |
75.4 ± 27.0 |
271 ± 48.4 |
7.65 ± 1.9 |
1-4 |
2Detritus |
4.83 ± 0.57 |
-25.08 ± 0.90 |
2.03 ± 0.98 |
21.6 ± 12.9 |
11.76 ± 2.2 |
1-3 |
3Formulated feeds |
Crumble 40% |
6.45 ± 0.20 |
-22.91 ± 0.15 |
80.5 ± 0.03 |
521 ± 50 |
7.6 ± 0.22 |
1 |
Micropellets 40% |
4.82 ± 0.26 |
-23.95 ± 0.24 |
64.7 ± 5.98 |
459 ± 10 |
8.32 ± 0.5 |
2 |
Pellet 35% |
5.80 ± 0.13 |
-23.97 ± 0.17 |
67.9 ± 11.5 |
494 ± 63 |
8.51 ± 0.3 |
3, 4 |
1Natural diet components (% dry weight): Protein content: 35-40%, fats 6-7%, Crude fiber: 8.6-9%, Nitrogen-Free Extract (NFE) 30-46%. 2Detritus: Protein content: 13-17%,
fats 3-4%, crude fiber: 7.5-9.2%, and NFE (including ash): 60-70%. 3Different formulated feed used in intensive shrimp culture: Protein content: 40-45% (indicated), fats
8-9%, crude fiber: 3.5-4.5%, and NFE: 42-48%. Facts as reported on labels. |
