Journal of Marine Science: Research & Development
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The change from traditional subsistence to semi-intensive is leading to an increase in the demand for aquaculture feeds.
The culture of freshwater prawn,
in Fiji as protein source and source of income for small-scale
farmers is important. However, due to the unavailability and high cost of feed ingredients and formulated feeds, the supply and
quality of feeds for aquaculture development is restricted. In addition, the lack of information on cost-effective channels to deliver
feeds to farmers has contributed to the poor production and profitability. A nutritional study was conducted to evaluate growth
fed iso-energetic, low cost formulated diets, using locally available ingredients in ponds for 124
days. Two formulated (MBM+MM+CP-diet 1 and FM+Wht-diet 2) and two commercial (Crest tilapia pellet-diet 3 and Pacific
prawn pellet - diet 4) diets were fed. The study indicated no significant differences for weight gain and survival rate (P ≥0.05). It
was observed that diet 2 induced highest growth rate while the lowest FCR (0.97?0.02) value was obtained for the same diet. The
survival of prawns ranged between 83.43 mm ? 5.55 and 89.26 mm ? 0.40 %. The highest prawn production was obtained with
diet 2 at 0.16 kg/m
. The economic analysis of
production showed that diet 2 was the least expensive (FJ$0.53)
to produce 1 kg of prawn as compared to the commercial diets (Pacific Prawn feed -FJ$0.89 and Crest Tilapia feed - FJ$0.69).
Therefore, this study suggests that
growth was slightly improved when using the formulated diet 2 although the
highest survival rate (89.26?0.40 %) was obtained from the formulated diet 1. Diet 2 may be recommended to the farmers for
in ponds in comparison to both commercial diets in Fiji.
Khairul Azam has completed his Ph.D. in 1990 from the University of Strathclyde, Glagow, U.K. He did his post doctoral from the University of Hull
and University of Pertanian, Malaysisa. He worked as Researcher and Faculty for the last 27 years. He is a Professor at the University of Khulna,
Bangladesh but presently on lien and working as Senior Faculty, School of Marine Studies, at the University of the South Pacific, Fiji. He has
numerous publications to his credit and has attended national and international seminars and workshops. He was the Dean, Life Science School at
Khulna University during 2002-2004.
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