{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,2]],"date-time":"2026-09-02T18:41:44Z","timestamp":1788374504532,"version":"build-2803163510"},"reference-count":121,"publisher":"MDPI AG","issue":"10","license":[{"start":{"date-parts":[[2021,9,27]],"date-time":"2021-09-27T00:00:00Z","timestamp":1632700800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Animals"],"abstract":"<jats:p>During bullfights, bulls undergo physiometabolic responses such as glycolysis, anaerobic reactions, cellular oedema, splenic contraction, and hypovolemic shock. The objective of this review article is to present the current knowledge on the factors that cause stress in fighting bulls during bullfights, including their dying process, by discussing the neurobiology and their physiological responses. The literature shows that biochemical imbalances occur during bullfights, including hypercalcaemia, hypermagnesaemia, hyperphosphataemia, hyperlactataemia, and hyperglycaemia, associated with increased endogenous cortisol and catecholamine levels. Creatine kinase, citrate synthase, and lactate dehydrogenase levels also increase, coupled with decreases in pH, blood bicarbonate levels, excess base, partial oxygen pressure, and oxygen saturation. The intense exercise also causes a marked decrease of glycogen in type I and II muscle fibres that can produce myoglobinuria and muscular necrosis. Other observations suggest the presence of osteochondrosis. The existing information allows us to conclude that during bullfights, bulls face energy and metabolic demands due to the high intensity and duration of the exercise performed, together with muscular injuries, physiological changes, and high enzyme concentrations. In addition, the final stage of the bullfight causes a slow dying process for an animal that is sentient and conscious of its surroundings.<\/jats:p>","DOI":"10.3390\/ani11102820","type":"journal-article","created":{"date-parts":[[2021,9,27]],"date-time":"2021-09-27T10:39:20Z","timestamp":1632739160000},"page":"2820","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Quality of Death in Fighting Bulls during Bullfights: Neurobiology and Physiological Responses"],"prefix":"10.3390","volume":"11","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0562-0367","authenticated-orcid":false,"given":"Daniel","family":"Mota-Rojas","sequence":"first","affiliation":[{"name":"Neurophysiology, Behavior and Animal Welfare Assessment, DPAA, Xochimilco Campus, Universidad Aut\u00f3noma Metropolitana, Ciudad de M\u00e9xico 04960, Mexico"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7169-5300","authenticated-orcid":false,"given":"Fabio","family":"Napolitano","sequence":"additional","affiliation":[{"name":"Scuola di Scienze Agrarie, Forestali, Alimentari ed Ambientali, Universit\u00e0 Degli Studi Della Basilicata, 85100 Potenza, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ana","family":"Strappini","sequence":"additional","affiliation":[{"name":"Animal Science Institute, Faculty of Veterinary Sciences, Universidad Austral de Chile, Valdivia 5090000, Chile"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1226-7717","authenticated-orcid":false,"given":"Agust\u00edn","family":"Orihuela","sequence":"additional","affiliation":[{"name":"Facultad de Ciencias Agropecuarias, Universidad Aut\u00f3noma del Estado de Morelos, Cuernavaca 62209, Mexico"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8681-4261","authenticated-orcid":false,"given":"Julio","family":"Mart\u00ednez-Burnes","sequence":"additional","affiliation":[{"name":"Animal Health Group, Faculty of Veterinary Medicine, Universidad Aut\u00f3noma de Tamaulipas, Ciudad Victoria 87000, Mexico"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4271-2906","authenticated-orcid":false,"given":"Ismael","family":"Hern\u00e1ndez-\u00c1valos","sequence":"additional","affiliation":[{"name":"Facultad de Estudios Superiores Cuautitl\u00e1n, Universidad Nacional Aut\u00f3noma de M\u00e9xico (UNAM), State of Mexico 54714, Mexico"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8153-8210","authenticated-orcid":false,"given":"Patricia","family":"Mora-Medina","sequence":"additional","affiliation":[{"name":"Facultad de Estudios Superiores Cuautitl\u00e1n, Universidad Nacional Aut\u00f3noma de M\u00e9xico (UNAM), State of Mexico 54714, Mexico"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Antonio","family":"Velarde","sequence":"additional","affiliation":[{"name":"IRTA, Animal Welfare Program, Veinat Sies S-N, 17121 Monells, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2021,9,27]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Wilson, D.E., and Reeder, A. 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