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Title: Effect of synthetic feed additive Stafac-20 on the growth characteristics of juveniles of white prawn Penaeus indicus (Crustacea/Penaeidea)
Authors: Sambhu, C.
Jayaprakas, V.
Keywords: Stafac-20
growth
feed utilization
RNA/DNA ratio
P. indicus
Issue Date: Mar-2003
Publisher: CSIR
Abstract: Juveniles of white prawn Penaeus indicus were fed with an antibiotic, virginiamycin containing feed additive Stafac-20 at concentrations of 40, 60, 80 and 100 g/kg through a fishmeal based supplementary feed having 40% protein. The growth study was carried out in nylon net hapa laid out in a brackish water pond for a period of 120 days. All diets containing Stafac-20 showed significant difference (P<0.01) in growth from that of the control with maximum growth (15.1 ± 1.21g) in the diet containing 80 g/kg Stafac-20. A short term (30 days) laboratory experiment was conducted in fiberglass tanks to assess the feed utilization of prawns. Feed conversion efficiency, assimilation efficiency, protein efficiency ratio and apparent nutrient digestibility were high in the prawn fed Stafac-20. RNA/DNA ratio in the muscle and hepatopancreas of prawns under Stafac-20 treatments were higher than control. Total protein content of the carcass increased while lipid, nitrogen free extract (NFE) and ash content did not vary from that of the control. Study showed that Stafac-20 stimulates the growth of P. indicus through enhanced feed intake, better nutrient digestibility and protein synthesis.
Page(s): 76-80
ISSN: 0379-5136
Source:IJMS Vol.32(1) [March 2003]

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