{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/46731"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/46731","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Effects of mixing on the growth performance of finishing pigs and factors affecting the response to mixing","abstract":"Five studies were conducted to evaluate the effects of mixing finishing pigs on growth performance and morbidity and mortality. Study 1 evaluated the effect of gender and of time of mixing (at either wk 9, 11, 13, 15, or 17 post-weaning) from 33.4 to 130.0 kg BW. The results of this study suggested that pigs can be mixed as late as week 17 post-weaning without affecting overall growth performance, carcass characteristics, or morbidity and mortality levels. Study 2 evaluated the effect of gender and of frequency of mixing during the marketing phase of the finishing period on the growth rate, carcass characteristics, and morbidity and mortality levels. This study showed no effect of gender or frequency of mixing (i.e., Not-mixed vs. Mixed Once vs. Mixed Twice) on morbidity and mortality levels. However, overall ADG was lower for pigs mixed twice than for those not mixed or mixed once. Studies 3 and 4 evaluated the effect of gender and BW (i.e., Light vs. Medium vs. Heavy BW) at mixing at the start of the finishing phase on growth performance and morbidity and mortality. In both studies, mixing had no effect on the growth performance of Light pigs. Mixing reduced the growth performance of Medium pigs on Study 3 but not in Study 4. Moreover, Mixing reduced the growth performance of Heavy pigs in both studies. The results of Studies 3 and 4 suggested that Mixing can have a short-term effect on the growth performance pigs, and that this effect may be influenced by other factors such as BW of pigs, but that no major long-term effect of mixing should be expected for growth performance and morbidity and mortality levels. Study 5 evaluated the effect of mixing pigs twice during the finishing phase on growth performance, and behavior (feeding and activity patterns, and aggression). The results of this study suggest that mixing pigs in the finishing period can increase the level of aggression for a short period of time, with no impact on overall growth performance or feeding patterns.","abstract_html":"Five studies were conducted to evaluate the effects of mixing finishing pigs on growth performance and morbidity and mortality. Study 1 evaluated the effect of gender and of time of mixing (at either wk 9, 11, 13, 15, or 17 post-weaning) from 33.4 to 130.0 kg BW. The results of this study suggested that pigs can be mixed as late as week 17 post-weaning without affecting overall growth performance, carcass characteristics, or morbidity and mortality levels. Study 2 evaluated the effect of gender and of frequency of mixing during the marketing phase of the finishing period on the growth rate, carcass characteristics, and morbidity and mortality levels. This study showed no effect of gender or frequency of mixing (i.e., Not-mixed vs. Mixed Once vs. Mixed Twice) on morbidity and mortality levels. However, overall ADG was lower for pigs mixed twice than for those not mixed or mixed once. Studies 3 and 4 evaluated the effect of gender and BW (i.e., Light vs. Medium vs. Heavy BW) at mixing at the start of the finishing phase on growth performance and morbidity and mortality. In both studies, mixing had no effect on the growth performance of Light pigs. Mixing reduced the growth performance of Medium pigs on Study 3 but not in Study 4. Moreover, Mixing reduced the growth performance of Heavy pigs in both studies. The results of Studies 3 and 4 suggested that Mixing can have a short-term effect on the growth performance pigs, and that this effect may be influenced by other factors such as BW of pigs, but that no major long-term effect of mixing should be expected for growth performance and morbidity and mortality levels. Study 5 evaluated the effect of mixing pigs twice during the finishing phase on growth performance, and behavior (feeding and activity patterns, and aggression). The results of this study suggest that mixing pigs in the finishing period can increase the level of aggression for a short period of time, with no impact on overall growth performance or feeding patterns.","abstract_has_math":false,"creators":["Ochoa Zaragoza, Luis Enrique"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Animal Sciences","degree_department":null,"school":null,"contributors":["Ellis, Michael","McKeith, Floyd K.","Shipley, Clifford","Ibargüengoytia, José Antonio Cuarón","Peterson, Beau"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2014,"date_issued":"2014-01-16T18:00:36Z","date_published":"2014-01-16T18:00:36Z","updated_at":"2026-07-22T22:25:36Z","subjects":["Pigs","Mixing","Growth Performance"],"languages":["en"],"rights":["Copyright 2013 Luis Enrique Ochoa Zaragoza"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/46731","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Ellis, Michael","McKeith, Floyd K.","Shipley, Clifford","Ibargüengoytia, José Antonio Cuarón","Peterson, Beau"]},{"key":"dc:creator","label":"Author","values":["Ochoa Zaragoza, Luis Enrique"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2014-01-16T18:00:36Z","2013-12"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Animal Sciences"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Pigs","Mixing","Growth Performance"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2013 Luis Enrique Ochoa Zaragoza"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/46731"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Five studies were conducted to evaluate the effects of mixing finishing pigs on growth performance and morbidity and mortality. Study 1 evaluated the effect of gender and of time of mixing (at either wk 9, 11, 13, 15, or 17 post-weaning) from 33.4 to 130.0 kg BW. The results of this study suggested that pigs can be mixed as late as week 17 post-weaning without affecting overall growth performance, carcass characteristics, or morbidity and mortality levels. Study 2 evaluated the effect of gender and of frequency of mixing during the marketing phase of the finishing period on the growth rate, carcass characteristics, and morbidity and mortality levels. This study showed no effect of gender or frequency of mixing (i.e., Not-mixed vs. Mixed Once vs. Mixed Twice) on morbidity and mortality levels. However, overall ADG was lower for pigs mixed twice than for those not mixed or mixed once. Studies 3 and 4 evaluated the effect of gender and BW (i.e., Light vs. Medium vs. Heavy BW) at mixing at the start of the finishing phase on growth performance and morbidity and mortality. In both studies, mixing had no effect on the growth performance of Light pigs. Mixing reduced the growth performance of Medium pigs on Study 3 but not in Study 4. Moreover, Mixing reduced the growth performance of Heavy pigs in both studies. The results of Studies 3 and 4 suggested that Mixing can have a short-term effect on the growth performance pigs, and that this effect may be influenced by other factors such as BW of pigs, but that no major long-term effect of mixing should be expected for growth performance and morbidity and mortality levels. Study 5 evaluated the effect of mixing pigs twice during the finishing phase on growth performance, and behavior (feeding and activity patterns, and aggression). The results of this study suggest that mixing pigs in the finishing period can increase the level of aggression for a short period of time, with no impact on overall growth performance or feeding patterns.","Item withdrawn by Laura Spradlin (lspradl2@illinois.edu) on 2013-11-22T21:34:37Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 2 Ochoa_Luis.docx: 818093 bytes, checksum: 02547fdefb871a2794f117aabea55b63 (MD5) Ochoa_Luis.pdf: 1154088 bytes, checksum: 0f95a41285f9c3b08d3658552ad63278 (MD5)","Made available in DSpace on 2014-01-16T18:00:36Z (GMT). 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The results of this study suggested that pigs can be mixed as late as week 17 post-weaning without affecting overall growth performance, carcass characteristics, or morbidity and mortality levels. Study 2 evaluated the effect of gender and of frequency of mixing during the marketing phase of the finishing period on the growth rate, carcass characteristics, and morbidity and mortality levels. This study showed no effect of gender or frequency of mixing (i.e., Not-mixed vs. Mixed Once vs. Mixed Twice) on morbidity and mortality levels. However, overall ADG was lower for pigs mixed twice than for those not mixed or mixed once. Studies 3 and 4 evaluated the effect of gender and BW (i.e., Light vs. Medium vs. Heavy BW) at mixing at the start of the finishing phase on growth performance and morbidity and mortality. In both studies, mixing had no effect on the growth performance of Light pigs. Mixing reduced the growth performance of Medium pigs on Study 3 but not in Study 4. Moreover, Mixing reduced the growth performance of Heavy pigs in both studies. The results of Studies 3 and 4 suggested that Mixing can have a short-term effect on the growth performance pigs, and that this effect may be influenced by other factors such as BW of pigs, but that no major long-term effect of mixing should be expected for growth performance and morbidity and mortality levels. Study 5 evaluated the effect of mixing pigs twice during the finishing phase on growth performance, and behavior (feeding and activity patterns, and aggression). The results of this study suggest that mixing pigs in the finishing period can increase the level of aggression for a short period of time, with no impact on overall growth performance or feeding patterns.","Item withdrawn by Laura Spradlin (lspradl2@illinois.edu) on 2013-11-22T21:34:37Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 2 Ochoa_Luis.docx: 818093 bytes, checksum: 02547fdefb871a2794f117aabea55b63 (MD5) Ochoa_Luis.pdf: 1154088 bytes, checksum: 0f95a41285f9c3b08d3658552ad63278 (MD5)","Made available in DSpace on 2014-01-16T18:00:36Z (GMT). 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