Classification

FCR1

PPV (%)2

PER3

Fat Gain (g)

Energy utilization (%)4

SD
5
15
25

**
2.3+0.1c
2.9+0.1b
4.3+0.5a

**
14.0+0.7a
10.3+0.6b
6.3+1.1c

**
0.8+0.1a
0.7+0.1b
0.4+ 0.1c

*
0.5+0.1a
0.4+0.1b
0.3+ 0.1c

**
12.3+ 0.6a
9.2 + 0.5b
5.7+ 1.0c

WER
10%
20%

**
3.5+0.5a
2.8+0.2b

**
9.0+1.6b
11.4+1.3a

*
0.6+0.1a
0.7+0.1b

*
0.3+0.1b
0.4+0.1a

*
8.1+ 1.4b
10.1+1.1a

SD x WER

**4

*

*

*

**

Presented data are an average of three readings + S.E.
Means (+S.E.) in the same column having the same superscripts (capital) are not significantly different (P<0.05).
Significant level: N.S.=P>0.05, *=P≤0.05, ** P≤0.01.,
1 Feed conversion ratio (FCR),
2 Protein Productive Value (PPV %)=100×protein gained in shrimp body (gm)/ protein fed (gm).
3 Protein Efficiency Ratio (PER)=Gain in the shrimp weight (gm)/ protein fed (gm).
4 Energy Utilization (EU)=100×energy gained in shrimp / energy fed.
Table 4: Effect of stocking density (SD) and water exchange rate (WER) on feed and nutrient utilization efficiency of marine shrimp (Penaeus semisulcatus) post-larvae cultured in earthen grow-out ponds.
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