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Breathing patterns were largely unaffected by gestation; however, decreases in metabolic rate (rate of oxygen consumption) in the late stages of pregnancy induced a relative hyperventilation. The reductions in metabolic rate during late pregnancy prevent the calculation of the maintenance cost of pregnancy based on post-partum and neonatal metabolic rates. Despite the high relative litter mass of 38.9\u00b15.3%, lung diffusing capacity was maintained during all stages of pregnancy, suggesting that alterations in diffusion at the alveolar capillary membrane were not responsible for the relative hyperventilation. Lung volume was increased during pregnancy compared with non-pregnant females, but lung volume was significantly lower during pregnancy compared with post-partum lung volume. Pregnant females were unable to produce the same metabolic and ventilatory changes induced by exercise in non-pregnant females. This lack of ability to respond to increased respiratory drive during exercise may underpin the locomotor impairment measured during gestation in previous studies.<\/jats:p>","DOI":"10.1242\/jeb.111450","type":"journal-article","created":{"date-parts":[[2015,3,18]],"date-time":"2015-03-18T22:12:29Z","timestamp":1426716749000},"page":"931-939","source":"Crossref","is-referenced-by-count":9,"title":["Pregnancy limits lung function during exercise and depresses metabolic rate in the skink <i>Tiliqua nigrolutea<\/i>"],"prefix":"10.1242","volume":"218","author":[{"given":"Suzanne L.","family":"Munns","sequence":"first","affiliation":[{"name":"Biomedical Sciences, College of Public Health, Medical and Veterinary Sciences, James Cook University, Townsville, Queensland 4811, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ashley","family":"Edwards","sequence":"additional","affiliation":[{"name":"School of Biological Sciences, University of Tasmania, Hobart, Tasmania 7001, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Stewart","family":"Nicol","sequence":"additional","affiliation":[{"name":"School of Biological Sciences, University of Tasmania, Hobart, Tasmania 7001, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Peter B.","family":"Frappell","sequence":"additional","affiliation":[{"name":"School of Biological Sciences, University of Tasmania, Hobart, Tasmania 7001, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"237","reference":[{"key":"2021052800113497800_JEB111450C1","doi-asserted-by":"publisher","first-page":"733","DOI":"10.2307\/4133","article-title":"Escape tactics and vulnerability to predation associated with reproduction in the lizard Lacerta vivipara","volume":"50","author":"Bauwens","year":"1981","journal-title":"J. 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