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|Other Titles:||Respiratory Adaptation of Arboreal Snakes, Boiga Kraepelini|
Department of Life Science, NTNU
To adapt for arboreal life, tree-dwelling snakes have adopted many morphological changes. Among them, attenuated body shape and shortened vascular lung may induce certain drawbakcs that have never been discussed before. Both above traits may increase dead space and decrease the efficiency of carbon dioxide elimination. We predict the percentage of carbon dioxide in the expired air of arboreal snakes should higher than that of terrestrial snakes. Two species of snakes. Boiga kraepelini and Dinodon rufozonatum that represent arboreal and terrestrial snakes respectively were used in this test. Before test, the snakes were acclimated for two weeks. Other factors such as stomach content, diel cycle, ambient and body temperature were controlled. A Skin-tight flexible mask was made for each snake. Carbon dioxide content, analyzed by carbon dioxide analyzer CD-3A, was sampled from the expired air in a tube that was connected with the mask at the rostrum position. This tube was the only channel for respiration. We found that the carbon dioxide content of Boiga kraepelini and Dinodon rufozonatum has no significant difference. Therefore, the results contradicts our hypothesis. By improving material and method and/or inquiring more factors that affect respriatory efficiency will help to clarify our question.
|Appears in Collections:||生物學報|
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