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dc.contributor.authorKeady, S.M.
dc.contributor.authorKeane, M.G.
dc.contributor.authorWaters, S.M.
dc.contributor.authorWylie, A.R.
dc.contributor.authorO'Riordan, E.G.
dc.contributor.authorKeogh, K.
dc.contributor.authorKenny, D.A.
dc.date.accessioned2024-02-03T13:32:15Z
dc.date.available2024-02-03T13:32:15Z
dc.date.issued2021-06
dc.identifier.citationS.M. Keady, M.G. Keane, S.M. Waters, A.R. Wylie, E.G. O'Riordan, K. Keogh, D.A. Kenny, Effect of dietary restriction and compensatory growth on performance, carcass characteristics, and metabolic hormone concentrations in Angus and Belgian Blue steers, Animal, Volume 15, Issue 6, 2021, 100215, ISSN 1751-7311, https://doi.org/10.1016/j.animal.2021.100215.en_US
dc.identifier.urihttp://hdl.handle.net/11019/3538
dc.descriptionpeer-revieweden_US
dc.description.abstractCompensatory growth (CG) is the ability of an animal to undergo accelerated growth after a period of restricted feeding. However, there is a dearth of information in relation to the effect of genotype on CG response, thus the objective of this study was to evaluate CG response in two contrasting breed types, namely Aberdeen Angus (AN) and Belgian Blue (BB). Crossbred AN × Holstein-Friesian or BB × Holstein-Friesian steers were assigned to one of two treatment groups in a two (genotypes) × two (diets) factorial design. For 99 days, one group (11 AN and 12 BB) was offered a high energy control diet (H-H) whereas the second group (11 AN and 12 BB) was offered an energy restricted diet (L-H). At the end of the differential feeding period (99 days), both groups of animals were then offered a high energy control diet for a further 200 days. All animals were then slaughtered on day-299 of the study. During feed restriction, L-H had lower DM intake (DMI), had greater feed conversion ratio (FCR) and lower plasma concentrations of insulin, IGF-1, leptin, glucose, urea, betahydroxybutyrate and smaller M. longissimus thoracis or lumborum muscle and fat depths compared to H-H steers. During realimentation, there was no difference in DMI between diets; however, L-H had greater live weight gain compared to H-H steers. Overall, H-H consumed greater quantities on a DM basis, however, had a higher FCR compared to L-H steers. By the end of the realimentation period, there was no difference in plasma metabolite or hormone concentrations, linear body measurements, ultrasonically scanned fat depths, carcass conformation, dressing percentage or fat class between H-H and L-H steers. At slaughter, carcass weights were affected by diet with greater values for H-H compared to L-H steers. Genotype affected measures associated with body composition including pelvic width and both muscle and fat depths (P < 0.05). Overall, L-H had a CG (or recovery) index of 0.52 and did not make up for the loss of gains during the differential feeding period; however, M. longissimus thoracis et lumborum, a tissue of high economic value, recovered completely making it a target of interest for further investigation.en_US
dc.description.sponsorshipTEAGASC
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.relation.ispartofseriesAnimal;Vol 15
dc.rights© 2021 The Author(s). Published by Elsevier B.V. on behalf of BSAS: British Society of Animal Science.
dc.rightsAttribution-NonCommercial-ShareAlike 4.0 International*
dc.rights.urihttps://www.elsevier.com/tdm/userlicense/1.0/
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/4.0/*
dc.subjectCatch-up growthen_US
dc.subjectCattleen_US
dc.subjectFeed efficiencyen_US
dc.subjectFeed restrictionen_US
dc.subjectPhysiologyen_US
dc.titleEffect of dietary restriction and compensatory growth on performance, carcass characteristics, and metabolic hormone concentrations in Angus and Belgian Blue steersen_US
dc.typeArticleen_US
dc.identifier.doihttps://doi.org/10.1016/j.animal.2021.100215
dc.contributor.sponsorTeagasc Walsh Fellowshipen_US
dc.source.volume15
dc.source.issue6
dc.source.beginpage100215
refterms.dateFOA2024-02-03T13:32:38Z
dc.source.journaltitleAnimal


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