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Previous studies reported that repeated exposure to artificial UV radiation may cause damage to the immune system. Taking into account the importance of UV effects and the serum complement system, the relationship between them was investigated. The study lasted 90 days and was carried out in plastic chambers. Ninety six broad\u2010snouted caiman (<jats:italic>C. latirostris<\/jats:italic>) were assigned to four treatment groups with two replicates each: total darkness (TD), 8\u2009hr per day (8\u2009hr) and 16\u2009hr per day (16\u2009hr) of artificial UV\/visible light exposure, and normal photoperiod of natural light (NP). Snout\u2013vent length was measured to determine animal growth. Hemolytic assays were performed to evaluate the effects of artificial UV\/visible light, TD, and NP on the serum complement system. Results showed that animals grew more in the NP group. The capacity of <jats:italic>C. latirostris<\/jats:italic> serum to hemolyze sheep red blood cells was higher in the NP group than when they are maintained in constant light\u2013dark cycles (8 and 16\u2009hr) or in TD. These data demonstrate that artificial UV should be considered as a potential hazard for captive crocodilians if it is not properly managed, and this should be taken into account in the general design of facilities for reptilian husbandry. Zoo Biol 31:523\u2010533, 2012. \u00a9 2011 Wiley Periodicals, Inc.<\/jats:p>","DOI":"10.1002\/zoo.20417","type":"journal-article","created":{"date-parts":[[2011,8,17]],"date-time":"2011-08-17T19:34:19Z","timestamp":1313609659000},"page":"523-533","source":"Crossref","is-referenced-by-count":9,"title":["Ultraviolet Radiation on Innate Immunity and Growth of Broad\u2010Snouted Caiman (<i>Caiman latirostris<\/i>): Implications for Facilities Design"],"prefix":"10.1002","volume":"31","author":[{"given":"Pablo Ariel","family":"Siroski","sequence":"first","affiliation":[{"name":"Proyecto Yacar\u00e9, Laboratorio de Zoolog\u00eda Aplicada Anexo Vertebrados (FHUC\u2014UNL\/MASPyMA) Santa Fe Argentina"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Gisela Laura","family":"Poletta","sequence":"additional","affiliation":[{"name":"Proyecto Yacar\u00e9, Laboratorio de Zoolog\u00eda Aplicada Anexo Vertebrados (FHUC\u2014UNL\/MASPyMA) Santa Fe Argentina"},{"name":"C\u00e1tedra de Toxicolog\u00eda y Bioqu\u00edmica Legal Facultad de Bioqu\u00edmica y Ciencias Biol\u00f3gicas Universidad Nacional del Litoral Santa Fe Argentina; FCEN\u2010UBA, Bs. 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