{"id":{"repo_id":"guelph","oai_identifier":"oai:atrium.lib.uoguelph.ca:10214/3012"},"canonical_url":"https://search.dev.ndltd.org/etd/guelph/oai:atrium.lib.uoguelph.ca:10214/3012","repository":{"repo_id":"guelph","name":"University of Guelph","base_url":"https://atrium.lib.uoguelph.ca/server/oai/request"},"display":{"title":"Omega-3 polyunsaturated fatty acids utilization in growing pigs fed flaxseed containing diets","abstract":"Experiments were conducted to assess the effect of feeding diets containing ground flaxseed (FS); as a source of α-linolenic acid (18:3n-3), on whole body retention efficiency (RE) and disappearance (indirect measure of oxidation) of 18:3n-3, and apparent conversion (AC) of 18:3n-3 to n-3 highly unsaturated fatty acids (HUFA) in growing female pigs, using the mass balance approach (serial slaughter). Oxidation of 18:3n-3 was determined directly based on feeding U-13C-18:3n-3 and appearance of 13C in expired breath. Growth performance, composition of growth, body composition, and carcass and loin meat characteristics were not affected by feeding FS containing diets (P > 0.10). In selective pork cuts and the whole body, feeding FS increased (P < 0.10) the contents of 18:3n-3, eicosatrienoic acid (20:3n-3), eicosapentaenoic acid (20:5n-3), and docosapentaenoic acid (22:5n-3) but not docosahexaenoic acid (22:6n-3; P > 0.10). Expressed as a proportion of intake, RE of 18:3n-3 declined with duration of feeding FS (d 0 to 15 vs. d 15 to 30; P = 0.098; 68.4 vs. 52.8%). Similarly, the AC of 18:3n-3 to 20:3n-3 (8.87 vs. 5.53%) and 22:6n-3 (1.27 vs. 0.54%) was reduced over time (P < 0.05), whereas disappearance of 18:3n-3 increased over time (P = 0.074; 2.12 vs. 23.7%). At similar cumulative intake of 18:3n-3, stage of growth (25 to 50 vs. 85 to 110 kg BW) did not impact (P > 0.10) RE of 18:3n-3 and the sum of all n-3 polyunsaturated (PUFA; 95 vs. 110%), AC of 18:3n-3 to n-3 HUFA (19 vs. 22%), and oxidation of 18:3n-3 (7.0 vs. 5.6%); these parameters were influenced by dietary 18:3n-3 level. Pigs fed low dietary 18:3n-3 (0.8 g/kg) yielded both higher RE and AC of 18:3n-3 to n-3 HUFA than pigs on high dietary 18:3n-3 intake (15 g/kg). Oxidation of 18:3n-3 tended to increase with dietary 18:3n-3 level (P = 0.077; 7.97 vs. 4.67% for pigs on high and low dietary 18:3n-3, respectively) and was not affected by previous 18:3n-3 intake (P > 0.10). Feeding modest amounts of FS leads to a substantial and predictable enrichment of n-3 PUFA in pork without compromising carcass and meat quality. The content of n-3 PUFA appears to be independent of timing of feeding n-3 PUFA, providing flexibility as to when n-3 PUFA can be fed for generating n-3 PUFA enriched, value added pork.","abstract_html":"Experiments were conducted to assess the effect of feeding diets containing ground flaxseed (FS); as a source of α-linolenic acid (18:3n-3), on whole body retention efficiency (RE) and disappearance (indirect measure of oxidation) of 18:3n-3, and apparent conversion (AC) of 18:3n-3 to n-3 highly unsaturated fatty acids (HUFA) in growing female pigs, using the mass balance approach (serial slaughter). Oxidation of 18:3n-3 was determined directly based on feeding U-13C-18:3n-3 and appearance of 13C in expired breath. Growth performance, composition of growth, body composition, and carcass and loin meat characteristics were not affected by feeding FS containing diets (P &gt; 0.10). In selective pork cuts and the whole body, feeding FS increased (P &lt; 0.10) the contents of 18:3n-3, eicosatrienoic acid (20:3n-3), eicosapentaenoic acid (20:5n-3), and docosapentaenoic acid (22:5n-3) but not docosahexaenoic acid (22:6n-3; P &gt; 0.10). Expressed as a proportion of intake, RE of 18:3n-3 declined with duration of feeding FS (d 0 to 15 vs. d 15 to 30; P = 0.098; 68.4 vs. 52.8%). Similarly, the AC of 18:3n-3 to 20:3n-3 (8.87 vs. 5.53%) and 22:6n-3 (1.27 vs. 0.54%) was reduced over time (P &lt; 0.05), whereas disappearance of 18:3n-3 increased over time (P = 0.074; 2.12 vs. 23.7%). At similar cumulative intake of 18:3n-3, stage of growth (25 to 50 vs. 85 to 110 kg BW) did not impact (P &gt; 0.10) RE of 18:3n-3 and the sum of all n-3 polyunsaturated (PUFA; 95 vs. 110%), AC of 18:3n-3 to n-3 HUFA (19 vs. 22%), and oxidation of 18:3n-3 (7.0 vs. 5.6%); these parameters were influenced by dietary 18:3n-3 level. Pigs fed low dietary 18:3n-3 (0.8 g/kg) yielded both higher RE and AC of 18:3n-3 to n-3 HUFA than pigs on high dietary 18:3n-3 intake (15 g/kg). Oxidation of 18:3n-3 tended to increase with dietary 18:3n-3 level (P = 0.077; 7.97 vs. 4.67% for pigs on high and low dietary 18:3n-3, respectively) and was not affected by previous 18:3n-3 intake (P &gt; 0.10). Feeding modest amounts of FS leads to a substantial and predictable enrichment of n-3 PUFA in pork without compromising carcass and meat quality. The content of n-3 PUFA appears to be independent of timing of feeding n-3 PUFA, providing flexibility as to when n-3 PUFA can be fed for generating n-3 PUFA enriched, value added pork.","abstract_has_math":false,"creators":["Martínez Ramírez, Héctor Ramón"],"institution":"University of Guelph","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":["de Lange, Cornelis F.M."],"committee_chairs":[],"committee_members":[],"year":2011,"date_issued":"2011-09-15","date_published":"2011-09-15","updated_at":"2026-08-21T16:45:07Z","subjects":["Flaxseed","pig","omega 3","apparent conversion","retention efficiency","oxidation"],"languages":["en"],"rights":["Attribution 2.5 Canada"],"rights_urls":["http://creativecommons.org/licenses/by/2.5/ca/"],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/10214/3012","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"source_record":{"url":"https://atrium.lib.uoguelph.ca/server/oai/request?verb=GetRecord&metadataPrefix=dim&identifier=oai%3Aatrium.lib.uoguelph.ca%3A10214%2F3012","prefix":"dim"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["de Lange, Cornelis F.M."]},{"key":"dc:creator","label":"Author","values":["Martínez Ramírez, Héctor Ramón"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2011-09-15T17:46:17Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2011-09-15T17:46:17Z"]},{"key":"dc:date.issued","label":"Date","values":["2011-09-15"]},{"key":"dc:publisher","label":"Institution","values":["University of Guelph"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Flaxseed","pig","omega 3","apparent conversion","retention efficiency","oxidation"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Attribution 2.5 Canada"]},{"key":"dc:rights.uri","label":"Rights URI","values":["http://creativecommons.org/licenses/by/2.5/ca/"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/10214/3012"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Experiments were conducted to assess the effect of feeding diets containing ground flaxseed (FS); as a source of α-linolenic acid (18:3n-3), on whole body retention efficiency (RE) and disappearance (indirect measure of oxidation) of 18:3n-3, and apparent conversion (AC) of 18:3n-3 to n-3 highly unsaturated fatty acids (HUFA) in growing female pigs, using the mass balance approach (serial slaughter). Oxidation of 18:3n-3 was determined directly based on feeding U-13C-18:3n-3 and appearance of 13C in expired breath. Growth performance, composition of growth, body composition, and carcass and loin meat characteristics were not affected by feeding FS containing diets (P > 0.10). In selective pork cuts and the whole body, feeding FS increased (P < 0.10) the contents of 18:3n-3, eicosatrienoic acid (20:3n-3), eicosapentaenoic acid (20:5n-3), and docosapentaenoic acid (22:5n-3) but not docosahexaenoic acid (22:6n-3; P > 0.10). Expressed as a proportion of intake, RE of 18:3n-3 declined with duration of feeding FS (d 0 to 15 vs. d 15 to 30; P = 0.098; 68.4 vs. 52.8%). Similarly, the AC of 18:3n-3 to 20:3n-3 (8.87 vs. 5.53%) and 22:6n-3 (1.27 vs. 0.54%) was reduced over time (P < 0.05), whereas disappearance of 18:3n-3 increased over time (P = 0.074; 2.12 vs. 23.7%). At similar cumulative intake of 18:3n-3, stage of growth (25 to 50 vs. 85 to 110 kg BW) did not impact (P > 0.10) RE of 18:3n-3 and the sum of all n-3 polyunsaturated (PUFA; 95 vs. 110%), AC of 18:3n-3 to n-3 HUFA (19 vs. 22%), and oxidation of 18:3n-3 (7.0 vs. 5.6%); these parameters were influenced by dietary 18:3n-3 level. Pigs fed low dietary 18:3n-3 (0.8 g/kg) yielded both higher RE and AC of 18:3n-3 to n-3 HUFA than pigs on high dietary 18:3n-3 intake (15 g/kg). Oxidation of 18:3n-3 tended to increase with dietary 18:3n-3 level (P = 0.077; 7.97 vs. 4.67% for pigs on high and low dietary 18:3n-3, respectively) and was not affected by previous 18:3n-3 intake (P > 0.10). Feeding modest amounts of FS leads to a substantial and predictable enrichment of n-3 PUFA in pork without compromising carcass and meat quality. The content of n-3 PUFA appears to be independent of timing of feeding n-3 PUFA, providing flexibility as to when n-3 PUFA can be fed for generating n-3 PUFA enriched, value added pork."]},{"key":"dc:title","label":"Title","values":["Omega-3 polyunsaturated fatty acids utilization in growing pigs fed flaxseed containing diets"]}]}],"canonical_facts":{"dc:contributor.advisor":["de Lange, Cornelis F.M."],"dc:creator":["Martínez Ramírez, Héctor Ramón"],"dc:date.accessioned":["2011-09-15T17:46:17Z"],"dc:date.available":["2011-09-15T17:46:17Z"],"dc:date.issued":["2011-09-15"],"dc:description.abstract":["Experiments were conducted to assess the effect of feeding diets containing ground flaxseed (FS); as a source of α-linolenic acid (18:3n-3), on whole body retention efficiency (RE) and disappearance (indirect measure of oxidation) of 18:3n-3, and apparent conversion (AC) of 18:3n-3 to n-3 highly unsaturated fatty acids (HUFA) in growing female pigs, using the mass balance approach (serial slaughter). Oxidation of 18:3n-3 was determined directly based on feeding U-13C-18:3n-3 and appearance of 13C in expired breath. Growth performance, composition of growth, body composition, and carcass and loin meat characteristics were not affected by feeding FS containing diets (P > 0.10). In selective pork cuts and the whole body, feeding FS increased (P < 0.10) the contents of 18:3n-3, eicosatrienoic acid (20:3n-3), eicosapentaenoic acid (20:5n-3), and docosapentaenoic acid (22:5n-3) but not docosahexaenoic acid (22:6n-3; P > 0.10). Expressed as a proportion of intake, RE of 18:3n-3 declined with duration of feeding FS (d 0 to 15 vs. d 15 to 30; P = 0.098; 68.4 vs. 52.8%). Similarly, the AC of 18:3n-3 to 20:3n-3 (8.87 vs. 5.53%) and 22:6n-3 (1.27 vs. 0.54%) was reduced over time (P < 0.05), whereas disappearance of 18:3n-3 increased over time (P = 0.074; 2.12 vs. 23.7%). At similar cumulative intake of 18:3n-3, stage of growth (25 to 50 vs. 85 to 110 kg BW) did not impact (P > 0.10) RE of 18:3n-3 and the sum of all n-3 polyunsaturated (PUFA; 95 vs. 110%), AC of 18:3n-3 to n-3 HUFA (19 vs. 22%), and oxidation of 18:3n-3 (7.0 vs. 5.6%); these parameters were influenced by dietary 18:3n-3 level. Pigs fed low dietary 18:3n-3 (0.8 g/kg) yielded both higher RE and AC of 18:3n-3 to n-3 HUFA than pigs on high dietary 18:3n-3 intake (15 g/kg). Oxidation of 18:3n-3 tended to increase with dietary 18:3n-3 level (P = 0.077; 7.97 vs. 4.67% for pigs on high and low dietary 18:3n-3, respectively) and was not affected by previous 18:3n-3 intake (P > 0.10). Feeding modest amounts of FS leads to a substantial and predictable enrichment of n-3 PUFA in pork without compromising carcass and meat quality. The content of n-3 PUFA appears to be independent of timing of feeding n-3 PUFA, providing flexibility as to when n-3 PUFA can be fed for generating n-3 PUFA enriched, value added pork."],"dc:identifier.uri":["http://hdl.handle.net/10214/3012"],"dc:language.iso":["en"],"dc:publisher":["University of Guelph"],"dc:rights":["Attribution 2.5 Canada"],"dc:rights.uri":["http://creativecommons.org/licenses/by/2.5/ca/"],"dc:subject":["Flaxseed","pig","omega 3","apparent conversion","retention efficiency","oxidation"],"dc:title":["Omega-3 polyunsaturated fatty acids utilization in growing pigs fed flaxseed containing diets"],"dc:type":["Thesis"]},"updated_at":"2026-08-21T16:45:07Z"}