%0 Journal Article %T Effect of oils sources on blood lipid parameters of commercial laying hens %A Murata %A LS %A Ariki %A J %A Machado %A CR %A Silva %A L da PG da %A Rezende %A MJM %J Revista Brasileira de Ci¨ēncia Av¨Ēcola %D 2003 %I Funda??o APINCO de Ci¨ēncia e Tecnologia Av¨Ēcolas %R 10.1590/S1516-635X2003000300008 %X the experiment was carried out to verify if total cholesterol, hdl-cholesterol and triacylglicerol plasma levels are affected when laying hens are fed rations containing different dietary oil sources. one hundred sixty 50 week-old hens, assigned to four treatments with five replicates using 8 hens per replicate were used. the experimental period was of 84 days divided in 3 cycles of 28 days each. in the last day of each cycle, blood samples of 2 hens per replicate were randomly choose and blood samples were collected. on the other hand, blood was also collected at 7 am, 11 am and 3 pm aiming to study the daily changes of these lipids. blood lipid parameters were not affected by different dietary oil sources (p > 0.05); however, hdl-cholesterol did change during the day, giving evidence that this lipid is indeed involved in the egg yolk formation. %K blood lipids %K diet %K laying hens %K oil source. %U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S1516-635X2003000300008&lng=en&nrm=iso&tlng=en