{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,27]],"date-time":"2026-09-27T11:59:49Z","timestamp":1790510389144,"version":"4.1.0"},"reference-count":23,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2005,5,12]],"date-time":"2005-05-12T00:00:00Z","timestamp":1115856000000},"content-version":"vor","delay-in-days":9477,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J. Exp. Zool."],"published-print":{"date-parts":[[1979,6]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>The ventilatory pattern in the Nile crocodile consists of episodes of breathing, interrupted by periods of breath\u2010holdin, the latter occupying 80% of total time during normal breathing at 25\u00b0C.<\/jats:p><jats:p>End\u2010tidal gas composition varied with the periodic breathing but Po<jats:sub>2<\/jats:sub> was always high (Po<jats:sub>2<\/jats:sub>&lt;110 torr) and Pco<jats:sub>2<\/jats:sub> low (Pco<jats:sub>2<\/jats:sub>&lt;25 torr). The alveolar gas exchange ratio, R<jats:sub>E<\/jats:sub>, was very low during the non\u2010ventilatory periods (R<jats:sub>E<\/jats:sub> \u2243 0.5), but increased markedly during ventilation.<\/jats:p><jats:p>Breathing of hypoxic and hypercapnic gases caused a pronounced decrease in the duration of breath\u2010holds. Hypercapnia decreased breathing frequency during ventilatory periods, but increased tidal volume.<\/jats:p><jats:p>The results are discussed in relation to the practice of prolonged breath\u2010holding associated with diving in crocodiles.<\/jats:p>","DOI":"10.1002\/jez.1402080308","type":"journal-article","created":{"date-parts":[[2005,6,11]],"date-time":"2005-06-11T04:41:16Z","timestamp":1118464876000},"page":"319-325","source":"Crossref","is-referenced-by-count":35,"title":["Periodic breathing in the crocodile, <i>Crocodylus niloticus<\/i>: Consequences for the gas exchange ratio and control of breathing"],"prefix":"10.1002","volume":"208","author":[{"given":"M. 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