Document Detail

Effect of type and level of fish oil supplementation on yolk fat composition and n-3 fatty acids retention efficiency in laying hens.
MedLine Citation:
PMID:  16546796     Owner:  NLM     Status:  MEDLINE    
1. Laying hen performance and yolk fat fatty acid (FA) concentrations were evaluated with respect to the inclusion in the diet of different sources and levels of marine fish oil (MFO). 2. Twelve diets were arranged factorially, with three sources (MFO1, MFO2_EPA, MFO3_DHA) and four levels of inclusion (15, 30, 45 and 60 g/kg) of MFO. 3. Type of diet had little effect on egg production traits, although laying rate and shell thickness slightly decreased at the highest level of MFO supplementation. 4. An increase in level of inclusion of MFO from 15 to 60 g/kg linearly increased concentrations of C20:5 n-3, C22:5 n-3, C22:6 n-3 and total n-3 FA in yolk fat, but greatly impaired their efficiencies of deposition (g retained/g ingested). 5. An interaction between type and dietary concentration of MFO was found, as the reduction in efficiency of retention of n-3 FA in egg fat with level of MFO was less when the proportion of n-3 in total FA decreased or when that of DHA in total n-3 FA increased. 6. MFO3_ DHA was more efficiently used for total n-3 FA yolk deposition than MFO2_EPA at a similar total n-3 FA intake. 7. Dietary inclusion of MFO reduced LC n-6 FA yolk fat content, which additionally decreased the ratio between total n-6 and total n-3 FA in egg fat. 8. Regression equations were calculated in order to predict efficiency of retention and n-3 FA concentration of yolk fat in the range of diets studied.
P Cachaldora; P García-Rebollar; C Alvarez; J C De Blas; J Méndez
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Publication Detail:
Type:  Journal Article; Randomized Controlled Trial    
Journal Detail:
Title:  British poultry science     Volume:  47     ISSN:  0007-1668     ISO Abbreviation:  Br. Poult. Sci.     Publication Date:  2006 Feb 
Date Detail:
Created Date:  2006-03-20     Completed Date:  2006-06-13     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  15740290R     Medline TA:  Br Poult Sci     Country:  England    
Other Details:
Languages:  eng     Pagination:  43-9     Citation Subset:  IM    
COREN, Sociedad Cooperativa Galega, Ourense, Spain.
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MeSH Terms
Animal Feed
Dietary Supplements*
Dose-Response Relationship, Drug
Egg Shell
Egg Yolk / chemistry,  drug effects*,  metabolism*
Eggs / standards
Fatty Acids, Omega-3 / analysis,  metabolism*
Fish Oils / administration & dosage*,  classification,  pharmacology*
Reg. No./Substance:
0/Fatty Acids, Omega-3; 0/Fish Oils

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