The effect of C/N ratio control on production of freshwater prawn Macrobrachium rosenbergii in ponds is additive to substrate addition for periphyton development.

M. Asaduzzaman, S. Huque, M.A. Wahab, M.C.J. Verdegem

Research output: Chapter in Book/Report/Conference proceedingAbstract

Abstract

The present research investigated the effect of carbon/nitrogen ratio (C/N ratio) with or without substrates addition for periphyton development on production performances of giant freshwater prawn. In this experiment, C/N ratio 10, 15 and 20 (CN10, CN15 and CN20) with or without periphyton substrates addition (CN10+P, CN15+P and CN20+P) were compared in 40 m-2 ponds stocked with 2 prawn juveniles (5.023 g) m-2. A common feed with C/N ratio10 was formulated using fish meal, meat and bone meal, soybean meal, mustard oil cake, wheat flour, and rice bran. Tapioca starch was used as carbohydrate source for manipulating C/N ratio and applied to the water column separately from feed followed by the first feeding during the day. Increasing C/N ratio from 10 to 20 significantly reduced (P 0.05) among the treatments, but the number of benthic organisms decreased over time indicated that the prawns grazed on them. The lower specific growth rate (SGR), the higher food conversion ratio (FCR), and lower protein efficiency ratio (PER) values were recorded in CN10 treatment compare to prawns in other treatments (P0.05) on the harvest size but significantly (P
Original languageEnglish
Title of host publicationBook of Abstracts of World Aquaculture 2008, Aquaculture for human wellbeing - The Asian Perspective, May 19-23, 2008, Busan, Korea
Pages33
Publication statusPublished - 2008
EventAquaculture for human wellbeing - The Asian Perspective -
Duration: 19 May 200823 May 2008

Conference

ConferenceAquaculture for human wellbeing - The Asian Perspective
Period19/05/0823/05/08

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