Fish proteins not lipids are the major nutrients limiting the use of vegetable ingredients in catfish nutrition

Research output: Contribution to journalArticle

Abstract

The objective of this study was to determine the major nutrient limiting growth and lipid metabolism in African catfish fed diets composed of vegetable ingredients. Four diets were formulated from contrasted meal (fish meal: FM; vegetable meal: VM) and oil (fish oil: FO; vegetable oil: VO) sources. Replacement of FO by VO did not affect specific growth rate (SGR) and feed efficiency, whereas lower values were recorded in the case of FM replacement. LC-PUFAs muscle contents were higher in fish fed control FMFO diet than in fish fed vegetable ingredients. However, the decrease in docosahexaenoic acid (DHA) concentration in FMVO group was limited compared to VM groups despite the same low DHA level in those three diets. These results may suggest an activation of LC-PUFA biosynthesis from PUFA precursors brought with vegetable oils in FMVO group. This hypothesize is reinforced by the significant stimulation of elovl5 gene expression in liver and intestine from fish fed FMVO. Therefore, this study demonstrated that African catfish is able to bioconvert LC-PUFAs at a significant biological level when FO is replaced by VO whereas the use of plant proteins has strong detrimental effects on growth performances.

Original languageEnglish
Pages (from-to)1393-1405
Number of pages13
JournalAquaculture Nutrition
Volume24
Issue number5
DOIs
Publication statusPublished - 1 Oct 2018

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Fish Proteins
Catfishes
catfish
Vegetables
vegetable
nutrition
Fishes
ingredients
lipid
vegetables
fish feeds
Diet
Meals
Lipids
Food
protein
Plant Oils
Docosahexaenoic Acids
nutrient
diet

Keywords

  • African catfish (Clarias gariepinus)
  • ELOVL5
  • FADS2
  • gene expression
  • LC-PUFA
  • vegetable ingredients

Cite this

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title = "Fish proteins not lipids are the major nutrients limiting the use of vegetable ingredients in catfish nutrition",
abstract = "The objective of this study was to determine the major nutrient limiting growth and lipid metabolism in African catfish fed diets composed of vegetable ingredients. Four diets were formulated from contrasted meal (fish meal: FM; vegetable meal: VM) and oil (fish oil: FO; vegetable oil: VO) sources. Replacement of FO by VO did not affect specific growth rate (SGR) and feed efficiency, whereas lower values were recorded in the case of FM replacement. LC-PUFAs muscle contents were higher in fish fed control FMFO diet than in fish fed vegetable ingredients. However, the decrease in docosahexaenoic acid (DHA) concentration in FMVO group was limited compared to VM groups despite the same low DHA level in those three diets. These results may suggest an activation of LC-PUFA biosynthesis from PUFA precursors brought with vegetable oils in FMVO group. This hypothesize is reinforced by the significant stimulation of elovl5 gene expression in liver and intestine from fish fed FMVO. Therefore, this study demonstrated that African catfish is able to bioconvert LC-PUFAs at a significant biological level when FO is replaced by VO whereas the use of plant proteins has strong detrimental effects on growth performances.",
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Fish proteins not lipids are the major nutrients limiting the use of vegetable ingredients in catfish nutrition. / Sourabié, A.; Mandiki, Robert; Geay, F.; Sene, T.; Toguyeni, A.; Kestemont, P.

In: Aquaculture Nutrition, Vol. 24, No. 5, 01.10.2018, p. 1393-1405.

Research output: Contribution to journalArticle

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