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Table 1 Growth performance and feed utilization indices

From: Assessment of the growth performance and haematological indices of Clarias gariepinus fingerlings exposed to soap effluent

Parameter

Formula

References

1. Mean weight gain (MWG) (g)

Wf-Wi

Pitcher and Hart (1982)

2. Relative growth rate (RGR) (g/fish/day)

MWG × 100/Wi

Davies and Ezenwa (2010)

3. Daily weight gain (DWG) (g)

MWG/D

Pitcher and Hart (1982)

4. Total feed intake (TFI) (g)

TWF/Nc

Abdel-Hakim et al. (2008)

5. Daily feed intake (DFI) (g)

TFI/D

Abdel-Hakim et al. (2008)

6. Specific growth rate (SGR) (%/d)

Log Wf—Log Wi × 100/D

Brown (1957)

7. Food conversion ratio (FCR)

TFI/MWG

Burel et al. (2000)

8. Protein intake (PI) (g)

Diet protein content x DFI

Sveier et al. (2000)

9. Protein efficiency ratio (PER)

MWG/PI

Wilson (1989)

10. Survival (%)

Nf × 100/Ni

Deyab et al. (2009)

  1. Wf, final weight of the fish; Wi, initial weight of the fish; D, rearing period; Nf, final number of fish at the end of the experiment; Ni, initial number of fish at the beginning of the experiment; TWF, total weight of feed fed; Nc, number of fish currently exposed; MWG, mean weight gain; TFI, total feed intake; DFI, daily feed intake