{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,7]],"date-time":"2026-10-07T02:02:24Z","timestamp":1791338544608,"version":"4.3.1"},"reference-count":84,"publisher":"MDPI AG","issue":"6","license":[{"start":{"date-parts":[[2020,5,29]],"date-time":"2020-05-29T00:00:00Z","timestamp":1590710400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100006769","name":"Russian Science Foundation","doi-asserted-by":"publisher","award":["18-14-00200"],"award-info":[{"award-number":["18-14-00200"]}],"id":[{"id":"10.13039\/501100006769","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Animals"],"abstract":"<jats:p>The total number of white blood cells (WBCs) is related the immune system. In mammals, it is affected by the body mass, but it is unclear how the numbers of different WBC types correlate with this parameter. We analyzed the effect of body mass on WBC number and ratio in felids, where species are similar in diet (warm-blood vertebrates) and reproductive strategy (promiscuity). Based on zoo veterinary data (ZIMS database) we analyzed the effect of body mass on WBC number and neutrophils\/lymphocytes ratio in 26 species of felids. The number of WBCs correlated with the body masses of animals: large cats had more WBC, which may be due to greater risks of infection associated with larger body surface, lifespan and home range size. For the first time we found obvious differences in the number of WBC types. Large cats also had more neutrophils and monocytes but fewer lymphocytes than smaller cats. The ratio of neutrophils to lymphocytes is greater in large felids. This phenomenon may be related to diet (relative prey size and kill utilization time), which suggests regular contact of large cats with bacterial and protozoal pathogens in contrast to the small cats.<\/jats:p>","DOI":"10.3390\/ani10060940","type":"journal-article","created":{"date-parts":[[2020,6,2]],"date-time":"2020-06-02T09:19:27Z","timestamp":1591089567000},"page":"940","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["Size Matters: Zoo Data Analysis Shows that the White Blood Cell Ratio Differs between Large and Small Felids"],"prefix":"10.3390","volume":"10","author":[{"given":"Sergey V.","family":"Naidenko","sequence":"first","affiliation":[{"name":"Department of Behaviour and Behavioral Ecology, A.N. Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, Leninsky Prospect 33, 119071 Moscow, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mikhail V.","family":"Alshinetskiy","sequence":"additional","affiliation":[{"name":"Veterinary Department, Moscow Zoo, Bolshaya Gruzinskya Str. 1, 123242 Moscow, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2020,5,29]]},"reference":[{"key":"ref_1","unstructured":"Long, C.A. (2007, January 26\u201328). Evolution of function and form in camelid erythrocytes. Proceedings of the 2007 WSEAS International Conference on Cellular and Molecular Biology\u2014Biophysics and Bioengineering, Athens, Greece."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"692","DOI":"10.1098\/rsbl.2007.0393","article-title":"Rodent sociality and parasite diversity","volume":"3","author":"Bordes","year":"2007","journal-title":"Biol. 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