Periphyton boosts production in pond aquaculture systems

E.A. Azim, M.C.J. Verdegem, M.A. Wahab, A.A. van Dam, M.C.M. Beveridge

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Silver perch (Bidyanus bidyanus, Mitchell) of 65 g average weight were reared at high density under controlled conditions on diets containing 24.8nd 40.6␙rotein. Diets were fed at 2␘r 4␘f the fish biomass day1. Both protein concentrations and feeding level of the diet influenced growth and proximate composition of the fish at the end of the 50-day growth trial. Energy requirement for maintenance for these fish was found to be 77 cal BW0.8 and for each unit of energy retained 3.78 cal BW0.8 needed to be supplied, and for each gram of protein retained per metabolic body weight 5.04 g were required. The results indicate that it is possible to obtain the same weight increment when feeding a 24.8␙rotein diet at a level of 4␋ody weight day1 as compared with only 2␋ody weight day1 of a 40.6␙rotein diet. This study indicates that the nutritional requirements for early grow-out are similar to those found in a previous study with juvenile silver perch and adds information concerning the required relationships between dietary amino acids. The results provide information required for further refinement of nutrition for this species
Original languageEnglish
Pages (from-to)57-61
JournalWorld Aquaculture
Volume32
Publication statusPublished - 2001

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