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Table 4 Effects of dietary threonine levels on IL, RGL, IW, ISI, IPC, HW, HSI, and HPC of sub-adult grass carp

From: Growth, digestive and absorptive capacity and antioxidant status in intestine and hepatopancreas of sub-adult grass carp Ctenopharyngodonidella fed graded levels of dietary threonine

Item Dietary Thr levels, g/kg diet
  3.3 5.9 8.4 10.9 13.1 15.8
ILf, cm /fish 58.1 ± 5.9a 58.5 ± 2.9a 61.8 ± 3.2ab 63.9 ± 3.5b 61.7 ± 3.2ab 59.6 ± 5.0a
RGLf, % 149.0 ± 18.1a 144.4 ± 7.6a 144.6 ± 8.1a 145.5 ± 7.7a 145.3 ± 7.7a 147.3 ± 10.8a
IWf, g /fish 6.3 ± 0.8a 9.8 ± 1.6bc 10.9 ± 1.6cd 14.0 ± 2.7e 11.8 ± 1.5d 9.2 ± 1.0 b
ISIf, % 1.04 ± 0.13a 1.24 ± 0.21b 1.16 ± 0.12b 1.26 ± 0.18b 1.25 ± 0.15b 1.16 ± 0.12b
IPCg, % 8.33 ± 0.63 a 9.57 ± 1.01bc 10.21 ± 1.02c 8.90 ± 0.73ab 8.71 ± 0.89ab 8.49 ± 0.90ab
HWf, g /fish 12.1 ± 2.1a 16.9 ± 2.5b 23.7 ± 5.7c 26.3 ± 7.1c 23.4 ± 3.6c 16.5 ± 3.3b
HSIf, % 1.98 ± 0.27a 2.14 ± 0.35ab 2.51 ± 0.54c 2.37 ± 0.48bc 2.49 ± 0.39c 2.08 ± 0.36ab
HPCg, % 9.46 ± 0.50a 9.12 ± 0.68a 11.61 ± 0.79c 10.60 ± 0.65b 11.15 ± 0.42bc 10.98 ± 0.97bc
  1. IL: Intestinal length; RGL: Relative gut length; IW: Intestinal weight; ISI: Intestosomatic index; IPC: Intestinal protein content; HW: Hepatopancreatic weight; HSI: Hepatosomatic index; HPC: Hepatopancreatic protein content
  2. a,b,c,d,eMeans in the same row without a letter in common are significantly different (P< 0.05)
  3. fValues are mean ± SD (n = 15)
  4. gValues are mean ± SD (n = 6)