Effect of dietary phytic acid and semi‐purified lignin on energy storage indices, growth performance, nutrient and energy partitioning of rainbow trout, Oncorhynchus mykiss
The effect of dietary phytic acid (PA) and semi‐purified lignin, and their interactions on growth performance, energy storage indices, nutrient deposition and partitioning in rainbow trout were studied in a 12‐week growth trial. Six isoproteic and isoenergetic diets were formulated differing only in...
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Published in | Aquaculture nutrition Vol. 21; no. 6; pp. 843 - 852 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Oxford
Blackwell Science
01.12.2015
Blackwell Publishing Ltd Hindawi Limited |
Subjects | |
Online Access | Get full text |
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Summary: | The effect of dietary phytic acid (PA) and semi‐purified lignin, and their interactions on growth performance, energy storage indices, nutrient deposition and partitioning in rainbow trout were studied in a 12‐week growth trial. Six isoproteic and isoenergetic diets were formulated differing only in their PA and lignin concentrations. In these diets, five essential amino acids: histidine, lysine, methionine (+ cysteine), threonine and tryptophan were formulated to be marginally adequate to the dietary requirement. Fish were pair‐fed with the amount of feed adjusted on a weekly basis. Among the performance indicators, dietary PA levels affected only the Fulton's body condition index (FCI) and whole carcass nitrogen retention efficiency (NRE; P < 0.05). On the contrary, lignin did not affect the whole carcass protein deposition (PD) and NRE but the lipid deposition (LD; P < 0.05), lipid retention efficiency (LRE; P < 0.01) and PD‐LD ratio (P < 0.05). Neither lignin nor phytic acid affected any parameters in dressed carcass and in viscera of rainbow trout except the visceral LD, which was affected only by the PA‐lignin interactions (P < 0.05). |
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Bibliography: | http://dx.doi.org/10.1111/anu.12208 ArticleID:ANU12208 istex:457FC354A437E67389317DADCBB502E653CAB5AF ark:/67375/WNG-F6THSFD2-4 Martin Mills Inc., Elmira, ON, Canada MITACS INC., Vancouver, BC, Canada ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 1353-5773 1365-2095 |
DOI: | 10.1111/anu.12208 |