Abstract #M455

# M455
Fatty acid composition of different fat depots from meat goats supplemented with tannin-rich pine bark.
Beruk B. Lemma*1, Jung Hoon Lee1, Byeng R. Min2, Govind Kannan1, Brou Kouakou1, 1Fort Valley State University, Fort Valley, GA, 2Tuskegee University, Tuskegee, AL.

This research assessed the effect of feeding ground pine bark (PB, Pinus spp.), containg up to 13% condensed tannins (CT) on a DM basis, on different fat depots in meat goats. Twenty-four intact male Kiko goats (8 mo of age; BW = 39.7 ± 2.55 kg) were grazed in a winter rye grass-dominant pasture, and supplemented either bermudagrass hay (BG) or PB pellet. Each supplementation (n = 12 goats/treatment) consisted of alfalfa pellet (16.9% CP, 3.30% ether extract or EE, 48.7% NDF), molasses, and mineral mixtures with either BG (20.5% CP, 4.44% EE, 40.9% NDF) or PB powder (9.10% CP, 3.35% EE, 59.0% NDF), which was provided at 1.5% of BW at individual feeding stations. After 50 d grazing, goats were harvested. Intramuscular, subcutaneous, and kidney fats were obtained from each carcass. Total lipids from each fat depot sample were extracted by the chloroform-methanol method. Extracted lipids were prepared for the fatty acid methyl esters (FAME) and then analyzed by a gas chromatography. All data were analyzed as a completely randomized design. Palmitic (C16:0), stearic (C18:0), oleic (C18:1n9), and linoleic (C18:2n6) acids were the major fatty acids in the intramuscular fats from goats supplemented with either BG-hay or PB-pellet (85.9 vs 86.0% of total fatty acid). The subcutaneous and kidney fats consisted mainly of myristic (C14:0), C16:0, C18:0, and C18:1n9 acids, which accounted for 79.1 and 81.9% vs 85.3 and 84.7% of total fatty acids in the BG-hay and PB-pellet supplemented goats, respectively. No significant differences were found in these major fatty acids in the 3 different fat depots from goats fed either BG-hay or PB-pellet. However, compared with goats fed BG-hay, goats fed PB-pellet had lower (P < 0.05) concentrations of margaric (C17:0), margaroleic (C17:1n9), and conjugated linoleic (C18:2, CLA) acids in intramuscular fats; a higher (P < 0.05) concentration of eicosapentaenoic (C20:5n3) acid in subcutaneous and kidney fats. The results indicate that the supplementation of PB did not change the major fatty acids in the different fat depots in meat goats.

Key Words: goat, pine bark, fatty acid profile