Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/16501
Citations | ||
Scopus | Web of Science® | Altmetric |
---|---|---|
?
|
?
|
Type: | Journal article |
Title: | An allometric study of lung morphology during development in the Australian pelican, Pelicanus conspicillatus, from embryo to adult |
Author: | Runciman, S. Seymour, R. Baudinette, R. Pearson, J. |
Citation: | Journal of Anatomy, 2005; 207(4):365-380 |
Publisher: | Blackwell Publishing Ltd |
Issue Date: | 2005 |
ISSN: | 0021-8782 1469-7580 |
Statement of Responsibility: | S. Runciman, R. S. Seymour, R. V. Baudinette and J. T. Pearson |
Abstract: | Pelicans produce altricial chicks that develop into some of the largest birds capable of sustained flight. We traced pulmonary morphological development in the Australian pelican, Pelicanus conspicillatus , from third trimester embryos to adults. We described growth and development with allometric relationships between lung components and body mass or lung volume, according to the equation y = ax b . Pelican lung volume increased faster than body mass ( b = 1.07). Relative to lung volume, the airways and vascular spaces increased allometrically ( b > 1) in embryos, but isometrically ( b ≈ 1) after hatching. Parabronchial mantle volume decreased ( b < 1) prior to hatching and increased isometrically thereafter. Surface area of air capillaries, blood capillaries and the blood–gas barrier increased relative to lung volume ( b > 0.67) before and after hatching. Barrier thickness decreased before hatching, remained constant in juveniles and decreased by adulthood. The anatomical diffusing capacity significantly increased before hatching ( b = 4.44) and after hatching ( b = 1.26). Although altricial pelicans developed pulmonary complexity later than precocial turkeys, the volume-specific characteristics were similar. However, lungs of volant adult pelicans became significantly larger, with a greater capacity for gas exchange, than lungs of terrestrial turkeys. Exchange characteristics of growing pelican lungs were inferior to those of adult birds of 26 other species, but converged with them at maturity. |
Keywords: | altricial bird development morphometry pulmonary |
Rights: | © Anatomical Society of Great Britain and Ireland 2005 |
DOI: | 10.1111/j.1469-7580.2005.00457.x |
Published version: | http://dx.doi.org/10.1111/j.1469-7580.2005.00457.x |
Appears in Collections: | Aurora harvest 2 Earth and Environmental Sciences publications |
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.