{"id":{"repo_id":"guelph","oai_identifier":"oai:atrium.lib.uoguelph.ca:10214/8692"},"canonical_url":"https://search.dev.ndltd.org/etd/guelph/oai:atrium.lib.uoguelph.ca:10214/8692","repository":{"repo_id":"guelph","name":"University of Guelph","base_url":"https://atrium.lib.uoguelph.ca/server/oai/request"},"display":{"title":"Impact of Residual Feed Intake Classification and Management Regimen on Feedlot Growth Performance, Carcass Traits, and Meat Quality in Beef Cattle","abstract":"Residual feed intake (RFI) is being used to replace traditional measures of feed efficiency due to improved accuracy for determining production efficiency for cattle in a selection program. The research examined the effects of RFI classification (determined in the grower phase using a common diet) and diverse management regimens (using metabolic modifiers (implants, beta agonists) applied in the finisher phase) on growth performance, carcass characteristics and meat quality for 156 Angus x Simmental steers. RFI determined in the grower phase did not always predict RFI accurately for the finisher phase. Metabolic modifiers did not affect RFI classification within a production phase or RFI classification across production phases. Metabolic modifiers increased carcass leanness and decreased meat tenderness. RFI may be a valuable tool for selecting feed efficient animals, but there may be a reduction in longissimus tenderness depending on the type of metabolic modifiers used.","abstract_html":"Residual feed intake (RFI) is being used to replace traditional measures of feed efficiency due to improved accuracy for determining production efficiency for cattle in a selection program. The research examined the effects of RFI classification (determined in the grower phase using a common diet) and diverse management regimens (using metabolic modifiers (implants, beta agonists) applied in the finisher phase) on growth performance, carcass characteristics and meat quality for 156 Angus x Simmental steers. RFI determined in the grower phase did not always predict RFI accurately for the finisher phase. Metabolic modifiers did not affect RFI classification within a production phase or RFI classification across production phases. Metabolic modifiers increased carcass leanness and decreased meat tenderness. RFI may be a valuable tool for selecting feed efficient animals, but there may be a reduction in longissimus tenderness depending on the type of metabolic modifiers used.","abstract_has_math":false,"creators":["Kelly, Janelle Elyse"],"institution":"University of Guelph","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":["Mandell, Ira"],"committee_chairs":[],"committee_members":[],"year":2015,"date_issued":"2015-01-08","date_published":"2015-01-08","updated_at":"2026-08-21T16:45:07Z","subjects":["Beef cattle","residual feed intake","beef quality","sensory evaluations","carcass traits","growth performance"],"languages":["en"],"rights":["Attribution-NonCommercial-NoDerivs 2.5 Canada"],"rights_urls":["http://creativecommons.org/licenses/by-nc-nd/2.5/ca/"],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/10214/8692","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%2F8692","prefix":"dim"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Mandell, Ira"]},{"key":"dc:creator","label":"Author","values":["Kelly, Janelle Elyse"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2015-01-08T20:31:26Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2015-01-08T20:31:26Z"]},{"key":"dc:date.issued","label":"Date","values":["2015-01-08"]},{"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":["Beef cattle","residual feed intake","beef quality","sensory evaluations","carcass traits","growth performance"]}]},{"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-NonCommercial-NoDerivs 2.5 Canada"]},{"key":"dc:rights.uri","label":"Rights URI","values":["http://creativecommons.org/licenses/by-nc-nd/2.5/ca/"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/10214/8692"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Residual feed intake (RFI) is being used to replace traditional measures of feed efficiency due to improved accuracy for determining production efficiency for cattle in a selection program. The research examined the effects of RFI classification (determined in the grower phase using a common diet) and diverse management regimens (using metabolic modifiers (implants, beta agonists) applied in the finisher phase) on growth performance, carcass characteristics and meat quality for 156 Angus x Simmental steers. RFI determined in the grower phase did not always predict RFI accurately for the finisher phase. Metabolic modifiers did not affect RFI classification within a production phase or RFI classification across production phases. Metabolic modifiers increased carcass leanness and decreased meat tenderness. RFI may be a valuable tool for selecting feed efficient animals, but there may be a reduction in longissimus tenderness depending on the type of metabolic modifiers used."]},{"key":"dc:title","label":"Title","values":["Impact of Residual Feed Intake Classification and Management Regimen on Feedlot Growth Performance, Carcass Traits, and Meat Quality in Beef Cattle"]}]}],"canonical_facts":{"dc:contributor.advisor":["Mandell, Ira"],"dc:creator":["Kelly, Janelle Elyse"],"dc:date.accessioned":["2015-01-08T20:31:26Z"],"dc:date.available":["2015-01-08T20:31:26Z"],"dc:date.issued":["2015-01-08"],"dc:description.abstract":["Residual feed intake (RFI) is being used to replace traditional measures of feed efficiency due to improved accuracy for determining production efficiency for cattle in a selection program. The research examined the effects of RFI classification (determined in the grower phase using a common diet) and diverse management regimens (using metabolic modifiers (implants, beta agonists) applied in the finisher phase) on growth performance, carcass characteristics and meat quality for 156 Angus x Simmental steers. RFI determined in the grower phase did not always predict RFI accurately for the finisher phase. Metabolic modifiers did not affect RFI classification within a production phase or RFI classification across production phases. Metabolic modifiers increased carcass leanness and decreased meat tenderness. RFI may be a valuable tool for selecting feed efficient animals, but there may be a reduction in longissimus tenderness depending on the type of metabolic modifiers used."],"dc:identifier.uri":["http://hdl.handle.net/10214/8692"],"dc:language.iso":["en"],"dc:publisher":["University of Guelph"],"dc:rights":["Attribution-NonCommercial-NoDerivs 2.5 Canada"],"dc:rights.uri":["http://creativecommons.org/licenses/by-nc-nd/2.5/ca/"],"dc:subject":["Beef cattle","residual feed intake","beef quality","sensory evaluations","carcass traits","growth performance"],"dc:title":["Impact of Residual Feed Intake Classification and Management Regimen on Feedlot Growth Performance, Carcass Traits, and Meat Quality in Beef Cattle"],"dc:type":["Thesis"]},"updated_at":"2026-08-21T16:45:07Z"}