Effects of diet and water source on the nursery production of Pacific
white shrimp Litopenaeus vannamei
C.A.
Otoshi, A.D. Montgomery, A.M. Look, S.M. Moss-2001
Journal
of the World Aquaculture Society, 32(2): 243-249 (from Current Contents)
Abstract :
Penaeid
shrimp reared in eutrophic pond water grow significantly faster than shrimp
in clear well water, and this growth enhancement is especially pronounced in
postlarval shrimp. The objective of this study was to determine if the
nutritional benefits of pond water could supplement a lower protein feed for
postlarval Pacific white shrimp Litopenaeus vannamei. Sixteen 230-L tanks
were stocked with 10-d postlarvae at a density of 350 shrimp/tank. Four
treatments (four replicates/treatment) were tested for 6 wk and consisted
of: 1) shrimp grown in well water and fed a commercially available
45%-protein feed (W/45); 2) shrimp grown in pond water and fed the same
45%-protein feed (P/45); 3) shrimp grown in well water and fed a
commercially available 52%-protein feed (W/ 52); and 4) shrimp grown in pond
water and fed the same 52%-protein feed (P/52). At the end of the
experiment, mean weight gain (+/- SE) for shrimp in pond water (1.85 +/-
0.03 g) was significantly greater (P < 0.0001) than shrimp in well water
(0.98 +/- 0.10 g). Mean weight gain for shrimp fed the 52%-protein feed
(1.56 +/- 0.13 g) was significantly greater (P < 0.0001) than shrimp fed
the 35%-protein feed (1.26 +/- 0.20 g). In addition, there was a significant
interaction effect between water source and feed (P < 0.0001). Mean
weight gain for shrimp in the W/52 treatment (1.23 +/- 0.04 g) was 68%
greater than shrimp in the W/45 treatment (0.73 +/- 0.03 g). However, mean
weight gain for shrimp in the P/52 treatment (1.90 +/- 0.03,a) was only 5%
greater than shrimp in the P/45 treatment (1.80 +/- 0.04 g). These results
suggest that organically rich pond water provides postlarval shrimp with
sufficient nutrients to compensate for nutritional deficiencies associated
with a lower protein feed.
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