Evaluation of replacing fish meal with corn protein concentrate in Nile tilapia Oreochromis niloticus fingerlings commercial diet

N. S.A. Khalifa, I. E.H. Belal, K. A. El-Tarabily, S. Tariq, A. A. Kassab

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

Four isocaloric-isonitrogenous diets containing 0, 50, 100 and 190 g/kg corn protein concentrate (CPC) as replacement for dietary fish meal were fed to Nile tilapia Oreochromis niloticus fingerlings for 8 weeks. Tilapia growth parameters were not significantly (p >.05) different in fish fed diets with 0, 50 and 100 g/kg CPC and found to be superior compared to those fed on 190 g/kg CPC. Fish dressing ratios and body composition were similar among all treatments. The electron microscope indicated that the stomach size of control fish was slightly smaller and the wall was thinner while the stomach of the fish fed all other levels of CPC undergone a remarkable size increase and their walls were thicker after feeding diets with CPC. Total aerobic bacterial and coliform counts were significantly decreased in fish intestine when fed diets with 100 and 190 g/kg CPC compared with fish fed diets with 0 g/kg or 50 g/kg CPC. This study indicates that it is possible to replace up to 534 g/kg of dietary fish meal in tilapia fingerlings using 100 g/kg of CPC without any negative effect on fish growth and proximate body composition.

Original languageEnglish
Pages (from-to)143-152
Number of pages10
JournalAquaculture Nutrition
Volume24
Issue number1
DOIs
Publication statusPublished - Feb 1 2018

Keywords

  • Nile tilapia
  • bacterial populations
  • commercial diets
  • corn protein concentrate
  • fish meal

ASJC Scopus subject areas

  • Aquatic Science

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