{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,8]],"date-time":"2025-10-08T15:14:59Z","timestamp":1759936499150,"version":"3.41.2"},"reference-count":36,"publisher":"The Company of Biologists","license":[{"start":{"date-parts":[[2018,1,1]],"date-time":"2018-01-01T00:00:00Z","timestamp":1514764800000},"content-version":"am","delay-in-days":0,"URL":"http:\/\/www.biologists.com\/user-licence-1-1\/"}],"funder":[{"DOI":"10.13039\/501100004263","name":"Funda??o de Amparo ? Pesquisa do Estado do Rio Grande do Sul","doi-asserted-by":"publisher","award":["FAPESP 2008\/57712-4"],"award-info":[{"award-number":["FAPESP 2008\/57712-4"]}],"id":[{"id":"10.13039\/501100004263","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100003593","name":"Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico","doi-asserted-by":"publisher","award":["573921\/2008-3"],"award-info":[{"award-number":["573921\/2008-3"]}],"id":[{"id":"10.13039\/501100003593","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100000038","name":"Natural Sciences and Engineering Research Council of Canada","doi-asserted-by":"publisher","award":["22R87150"],"award-info":[{"award-number":["22R87150"]}],"id":[{"id":"10.13039\/501100000038","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"abstract":"<jats:p>The structure and function of crocodilian lungs are unique compared to other reptiles. We examine the extent to which this, and the semi-aquatic lifestyle of crocodilians affect their respiratory mechanics. We measured changes in intratracheal pressure in adult and juvenile caiman (Caiman yacare) during static and dynamic lung volume changes. Respiratory mechanics of juvenile caiman were additionally measured while floating in water and submerged at 30\u00b0, 60\u00b0, and 90\u00b0 to the water's surface. The static compliance of the juvenile pulmonary system (2.89\u00b10.22 mL cmH2O 100g\u22121) was greater than that of adults (1.2\u00b10.41 ml cmH2O 100g\u22121), suggesting that the system stiffens as the body wall becomes more muscular and keratinized in adults. For both age groups, the lungs were much more compliant than the body wall, offering little resistance to air flow (15.35 and 4.25 for lungs, versus 3.39 and 1.67 mL cmH2O 100g\u22121 for body wall, in juveniles and adults respectively). Whole system dynamic mechanics decreased with increasing ventilation frequency (fR), but was unaffected by changes in tidal volume (VT). The vast majority of work of breathing was required to overcome elastic forces, however work to overcome resistive forces increased proportionally with fR. Work of breathing was higher in juvenile caiman submerged in water at 90\u00b0, due to an increase in work to overcome both elastic and flow resistive forces. The lowest power of breathing was found to occur at high fR and low VT for any given minute ventilation (V\u0307E) in caiman of all ages.<\/jats:p>","DOI":"10.1242\/jeb.193037","type":"journal-article","created":{"date-parts":[[2018,11,29]],"date-time":"2018-11-29T14:34:38Z","timestamp":1543502078000},"source":"Crossref","is-referenced-by-count":7,"title":["The respiratory mechanics of the yacare caiman (<i>Caiman yacare<\/i>Daudine)"],"prefix":"10.1242","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1634-2518","authenticated-orcid":false,"given":"Michelle N.","family":"Reichert","sequence":"first","affiliation":[{"name":"Royal Veterinary College, University of London, London, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Paulo R. C.","family":"de Oliveira","sequence":"additional","affiliation":[{"name":"Faculdade de Filosofia, Ci\u00eancias e Letras de Ribeir\u00e3o Preto, Universidade de S\u00e3o Paulo, Ribeir\u00e3o Preto, SP, Brazil"},{"name":"Instituto Federal do Paran\u00e1- C\u00e2mpus Avan\u00e7ado Goioer\u00ea, Goioer\u00ea, PR, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3609-315X","authenticated-orcid":false,"given":"George M. P. R.","family":"Souza","sequence":"additional","affiliation":[{"name":"School of Medicine of Ribeir\u00e3o Preto, Universidade de S\u00e3o Paulo, Ribeir\u00e3o Preto, SP, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Henriette G.","family":"Moranza","sequence":"additional","affiliation":[{"name":"Clinica M\u00e9dica Veterin\u00e1ria, Universidade Estadual Paulista, Jaboticabal, SP, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Wilmer A. Z.","family":"Restan","sequence":"additional","affiliation":[{"name":"Clinica M\u00e9dica Veterin\u00e1ria, Universidade Estadual Paulista, Jaboticabal, SP, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Augusto S.","family":"Abe","sequence":"additional","affiliation":[{"name":"Departamento de Zoologia, Universidade Estadual Paulista, Rio Claro, SP, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Wilfried","family":"Klein","sequence":"additional","affiliation":[{"name":"Faculdade de Filosofia, Ci\u00eancias e Letras de Ribeir\u00e3o Preto, Universidade de S\u00e3o Paulo, Ribeir\u00e3o Preto, SP, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"William K.","family":"Milsom","sequence":"additional","affiliation":[{"name":"Department of Zoology, University of British Columbia, Vancouver, B.C., Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"237","published-online":{"date-parts":[[2018,1,1]]},"reference":[{"key":"2021042500462630500_JEB193037C1","doi-asserted-by":"publisher","first-page":"13","DOI":"10.1016\/0034-5687(86)90057-5","article-title":"Respiratory mechanics and control of the ventilatory cycle in the gartner snake","volume":"64","author":"Bartlett","year":"1986","journal-title":"Respir. 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