Classification

Survival %1

T P kg /pond2

TPr/ha3

NPr/ha4

TC LE/m5

SD
5 SD
15 SD
25 SD

**
89.0 ± 2.0a
75.0+5.7b
51.6 ± 16.3c

**
1045.1 ± 35.8
2073.3 ± 49.6
1992.5 ± 72.0

*
4.49 ± 0.5b
7.92 ± 1.5a
7.4 ± 4.1a

**
2.18 ± 0.6c
4.3 ± 1.2a
2.84 ± 3.4b

**
2.32 ± 0.2c
3.62 ± 0.4b
4.56 ± 0.7a

WER
10 %
20%

**
63.8 ± 1.2b
79.9 + 4.3a

**
1871.9 ± 60.7
3238.9 ± 96.4

**
4.76 ± 1.4b
8.45 ± 2.8a

**
4.6 ± 1.6a
1.6 ± 1.6b

**
3.15 ± 0.8b
3.82 ± 1.2a

SD x WE

 

*

**

**

**

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 Survival Rate (%)=100×(No. of shrimp at harvest /No of shrimp at stocking)
2 TP kg /pond2=Total production / Hectare
3TPr/m2=Total profit per square meter
4NPr/m2=Net profit per cubic meter
5TC LE/m2=Total cost per square meter
Table 5: Effect of stocking density and water exchange rate on survival, and production of shrimp (Penaeus semisulcatus) post-larvae cultured in earthen ponds. Presented data are an average of two readings ± S.E.
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