J. Buchanan, H.Z. Sarac, D. Poppi, R.T. Cowan-1997
Aquaculture, 151: 29-35
Abstract:
Enhancement of nutritional value of canola meal by the addition of
enzymes was investigated in diets for juvenile Penaeus monodon (X
+/- SD; 0.96 +/- 0.09 g), with emphasis on liveweight gain and feed
conversion ratio (FCR). Six diets were prepared containing either no
canola (squid meal based basal diet), basal +20% canola (low canola
diet), low canola +0.25% enzyme mixture (Porzyme, Finufeeds
International), basal + 64% canola (high canola diet), high canola +
0.25% enzyme mixture or basal + 54% canola + 10% sucrose. All
diets were fed ad libitum. Juvenile prawns (three prawns per tank)
were fed diets for 42 days with five tank replications per diet.
Liveweight gain and feed intake were measured. High canola diet
gave significantly lower growth rates (1.79 +/- 0.42 g) (P < 0.05), and
enzyme addition increased the liveweight gain from this diet by 28%,
to a level similar to the basal (2.33 +/-0.49 g) (P > 0.05). The low
canola + enzyme diet also resulted in higher liveweight gain (2.40 +/-
0.16 g) than the basal and low canola diets (2.29 +/-0.27 g) but it was
not significant. Addition of the enzyme mixture to diets also gave a
significant improvement in FCRs. The addition of sucrose to the
canola based diet resulted in a significantly higher liveweight gain
(high canola + sucrose 2.01 +/- 0.22 g), but did not change the FCR.
(Department of Agriculture, University of Queensland, St Lucia, Qld
4072, Australia)
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