The experiment was conducted at Animal Science Department of University of Lavras-MG, with the objective to evaluate the quality of semem in natura of boars fed with rations supplemented with different sources of oils as sources of essential fat acids. Twenty four hybrid boars (AGPIC 337) were used, with initial average weight of 152,7 kg, assigned into a randomized complete blocks design, with four treatments (T1 = control; T2 = 3% linseed oil; T3 = 3% commercial oil PUFA® and T4 = 3% of fish oil) and six repetitions, being each animal as a experimental unit. The diets were isoenergetics and isoproteics, formulated with corn and soybean meal. The analyzed variables were seminal parameters as mobility, vigor, volume, concentration, total number of cells and anomalies spermatic, valued between four and eleventh week of the experimental period. The data showed any significant differences among the treatments for the motility, concentration and total anomalies spermatic (P>0,05), except for alteration of tail (P<0,05), whose supplementation with fish oil shown worse results. Also the spermatic vigor were significantly higher (P<0.05) for the boars fed rations with fish oil suplementation. The volume and total number of spermatozoid in the ejaculate, showed best results for those boars fed rations with commercial oil PUFA® (P<0,05). It was conclude that, the quality of the semen in natura, for boars fed rations he supplemented with commercial oil PUFA® and the fish oil showed to be more efficient for the parameters spermatic cells production and cells viability in the young boars.
Fat acids; seminal characteristics; nutrition; reproduction; swine
