water exchange rate (WER) on growth performance

Classification	Average body weight		ADG¹mg/PLs/day	SGR²%/DAY	TP3 kg.ha⁴
Classification	Initial (mg)	Final (mg)	ADG¹mg/PLs/day	SGR²%/DAY	TP3 kg.ha⁴
SD 5 15 25	N.S. 4.5 ± 0.3 4.5 ± 0.2 4.5 ± 0.4	** 22.4+1.2^a 17.50+1.14^b 15.30+1.0^b	** 109.3 ± 5.7^a 85.9 ± 5.5^b 74.6 ± 5.1^b	* 4.2+0.03^a 4.1+0.03^b 4.0+0.03^b	* 997.7+60.2^b 1979.7+198^a 2013.0 ± 451^a
WER 10% 20%	N.S. 4.5 ± 0.1 4.5 ± 0.7	** 16.9+1.4^b 19.9+1.5^a	** 82.8+6.7^b 97.1+7.3^a	** 4.0+0.04^b 4.1+0.04^a	** 1260.5+137^b 2066.5+206^a
SDxWER	N.S.	**	**	**	**

Means (+SE) in the same column having the same superscripts are not significantly different (p≥0.05). Significant level: N.S.=P>0.05, *=P≤0.05, ** P≤0.01.
1 Average daily gain (ADG)=(Final wt. – Initial wt.) / period (days).
2 Specific growth rate (SGR)=100 (ln Final wt--ln Initial wt.) / period (days).
3 TP. kg/ha =total production=Total weight of shrimp in the pond at harvest (gm)/ Total area of pond (m²).×10000

Table 3: Effect of stocking density (SD) and water exchange rate (WER) on growth performance of marine shrimp (Penaeus semisulcatus) post-larvae cultured in earthen ponds. Culture period was 205 days.

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