{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,20]],"date-time":"2026-08-20T14:41:54Z","timestamp":1787236914858,"version":"build-2736575974"},"reference-count":57,"publisher":"MDPI AG","issue":"21","license":[{"start":{"date-parts":[[2025,10,29]],"date-time":"2025-10-29T00:00:00Z","timestamp":1761696000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100007228","name":"Autonomous University of Baja California","doi-asserted-by":"crossref","award":["200\/5\/C\/47\/24"],"award-info":[{"award-number":["200\/5\/C\/47\/24"]}],"id":[{"id":"10.13039\/501100007228","id-type":"DOI","asserted-by":"crossref"}]},{"DOI":"10.13039\/501100007228","name":"Autonomous University of Baja California","doi-asserted-by":"crossref","award":["200\/5\/C\/58\/7"],"award-info":[{"award-number":["200\/5\/C\/58\/7"]}],"id":[{"id":"10.13039\/501100007228","id-type":"DOI","asserted-by":"crossref"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Animals"],"abstract":"<jats:p>Twenty Dorper \u00d7 Katahdin lambs (10 males and 10 females) were distributed in a 2 \u00d7 2 factorial arrangement under a randomized complete block design to evaluate the effects of thiamine diphosphate (TD) supplementation (0 vs. 250 mg\/kg feed) and gender (males vs. females) on physiological responses, feedlot performance, carcass characteristics, and meat quality in a hot desert environment. The average temperature and temperature\u2013humidity index recorded during the study were 33.60 \u00b0C and 35.89 units, respectively, indicating an extremely severe heat stress environment for lambs. Study variables were not affected (p \u2265 0.12) by the TD \u00d7 gender interaction, except for dry matter intake (DMI; p = 0.02) and some head temperatures (p \u2264 0.05) and carcass zoometric measurements (p \u2264 0.05). In females, but not in males, TD decreased DMI and increased thorax depth, as well as eye, ear, and forehead temperatures. Overall, TD increased (p \u2264 0.05) surface temperatures of neck, shoulder, loin, rump, forelimb, testicles, vulva, anus, and perineum without affecting (p \u2265 0.58) rectal temperature and respiratory rate. Supplemental TD did not affect (p \u2265 0.16) growth rate, feed efficiency, carcass weight and yield, Longissimus thoracic muscle area, backfat thickness, internal fat deposition, wholesale cut yields, and meat quality traits. In conclusion, in hair ewe lambs but not in male lambs, TD supplementation at a dose of 250 mg\/kg of feed in the fattening diet is an HS mitigation strategy that improves dietary energy efficiency for growth and carcass mass deposition. Furthermore, thiamine increases heat losses through the body surface, regardless of gender.<\/jats:p>","DOI":"10.3390\/ani15213143","type":"journal-article","created":{"date-parts":[[2025,10,30]],"date-time":"2025-10-30T00:50:19Z","timestamp":1761785419000},"page":"3143","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Thiamine Diphosphate Supplementation as a Heat-Stress Mitigation Strategy for Hair Male and Female Lambs in Feedlot: Physiological Responses, Growth Performance, and Carcass Traits"],"prefix":"10.3390","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6947-2247","authenticated-orcid":false,"given":"Ulises","family":"Mac\u00edas-Cruz","sequence":"first","affiliation":[{"name":"Instituto de Ciencias Agr\u00edcolas, Universidad Aut\u00f3noma de Baja California, Valle de Mexicali 21705, Baja California, Mexico"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"German","family":"Castillo Crist\u00f3bal","sequence":"additional","affiliation":[{"name":"Instituto de Ciencias Agr\u00edcolas, Universidad Aut\u00f3noma de Baja California, Valle de Mexicali 21705, Baja California, Mexico"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Leonel","family":"Avenda\u00f1o-Reyes","sequence":"additional","affiliation":[{"name":"Instituto de Ciencias Agr\u00edcolas, Universidad Aut\u00f3noma de Baja California, Valle de Mexicali 21705, Baja California, Mexico"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3401-1181","authenticated-orcid":false,"given":"Mar\u00eda de los \u00c1ngeles","family":"L\u00f3pez-Baca","sequence":"additional","affiliation":[{"name":"Instituto de Ciencias Agr\u00edcolas, Universidad Aut\u00f3noma de Baja California, Valle de Mexicali 21705, Baja California, Mexico"},{"name":"Instituto de Investigaci\u00f3n en Ciencias Veterinarias, Universidad Aut\u00f3noma de Baja California, Mexicali 21386, Baja California, Mexico"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5249-2858","authenticated-orcid":false,"given":"Jos\u00e9 A.","family":"Roque-Jim\u00e9nez","sequence":"additional","affiliation":[{"name":"Instituto de Ciencias Agr\u00edcolas, Universidad Aut\u00f3noma de Baja California, Valle de Mexicali 21705, Baja California, Mexico"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Miguel","family":"Mellado","sequence":"additional","affiliation":[{"name":"Departamento de Nutrici\u00f3n Animal, Universidad Aut\u00f3noma Agraria Antonio Narro, Saltillo 25315, Coahuila, Mexico"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0289-2009","authenticated-orcid":false,"given":"C\u00e9sar A.","family":"Meza-Herrera","sequence":"additional","affiliation":[{"name":"Unidad Regional Universitaria de Zonas \u00c1ridas, Universidad Aut\u00f3noma Chapingo, Bermejillo 35230, Durango, Mexico"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ricardo","family":"Vicente-P\u00e9rez","sequence":"additional","affiliation":[{"name":"Centro Universitario de La Costa Sur, Universidad de Guadalajara, Autl\u00e1n de Navarro 48900, Jalisco, Mexico"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8738-278X","authenticated-orcid":false,"given":"Marisol","family":"L\u00f3pez-Romero","sequence":"additional","affiliation":[{"name":"Instituto de Ciencias Agr\u00edcolas, Universidad Aut\u00f3noma de Baja California, Valle de Mexicali 21705, Baja California, Mexico"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6154-9983","authenticated-orcid":false,"given":"Nallely","family":"Rivero-P\u00e9rez","sequence":"additional","affiliation":[{"name":"Instituto de Ciencias Agropecuarias, Universidad Aut\u00f3noma del Estado de Hidalgo, Tulancingo de Bravo 43660, Hidalgo, Mexico"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2025,10,29]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"205","DOI":"10.22319\/rmcp.v11i1.4923","article-title":"Impacto Del Estr\u00e9s Por Calor En La Producci\u00f3n de Ovinos de Pelo. 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