Post-prandial changes in plasma mineral levels in rainbow trout fed a complete plant ingredient based diet and the effect of supplemental di-calcium phosphate

P. Antony Jesu Prabhu, J.W. Schrama, C. Mariojouls, S. Godin, S. Fontagné-Dicharry, I. Geurden, A. Surget, B. Bouyssiere, S.J. Kaushik

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Abstract

Post-prandial changes in plasma mineral levels and utilisation of minerals in rainbow trout fed complete plant ingredient based diets with or without supplemental di-calcium phosphate (DCP) were studied over an 8 week period. Three diets were used: diet M was FM and fish oil (FO) based diet (control); diets VP0 and VP + (V diets) were completely based on plant derived protein and lipid sources. One of the V diets (VP +) was supplemented with DCP to supply 5 g kg- 1 dry matter available phosphorus (P); while the other diet (VP0) was not supplemented with DCP. Change in dietary protein source significantly affected the post-prandial pattern in plasma levels of P (p <0.05), Ca (p <0.007), Mg (p <0.001) and Zn (p <0.03). Area under the curve analysis indicated that compared to VP0, DCP supplementation in VP + improved plasma levels of P (p <0.01) and K (p <0.05); Cu (p <0.002), Se (p <0.009) and Zn (p <0.001) levels were reduced while Ca, Mg and Fe levels were unaffected (p > 0.05). Based on measurement of apparent digestibility, growth and whole body composition analyses, mineral balances were established showing that supplementation of DCP led to significant increase in whole body P concentration and P retention in VP +, comparable to fish fed diet M with significantly (p <0.05) reduced faecal and non-faecal P losses. There was improved post-absorptive retention (as % of available intake) of Ca (p <0.05), Mg (p <0.05) and K (p <0.05) in VP + compared to VP0. Utilisation of Cu (p <0.05) and Zn (p <0.01) was negatively affected. DCP supplementation to complete plant ingredient based diet increased the post-prandial plasma levels, whole body concentration and utilisation of macro-minerals (P, Ca, Mg and K) whereas that of micro-minerals especially Zn and Cu were negatively affected.
Original languageEnglish
Pages (from-to)34-43
JournalAquaculture
Volume430
DOIs
Publication statusPublished - 2014

Keywords

  • salmon salmo-salar
  • fecal phosphorus excretion
  • european sea-bass
  • low fish-meal
  • oncorhynchus-mykiss
  • atlantic salmon
  • fresh-water
  • channel catfish
  • dicentrarchus-labrax
  • tricalcium phosphate

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    Antony Jesu Prabhu, P., Schrama, J. W., Mariojouls, C., Godin, S., Fontagné-Dicharry, S., Geurden, I., Surget, A., Bouyssiere, B., & Kaushik, S. J. (2014). Post-prandial changes in plasma mineral levels in rainbow trout fed a complete plant ingredient based diet and the effect of supplemental di-calcium phosphate. Aquaculture, 430, 34-43. https://doi.org/10.1016/j.aquaculture.2014.03.038