Does the saccular lung affect the cantilever ability of snakes?

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Terrestrial, and especially arboreal, snakes can generally span a greater distance than aquatic snakes, which have a relatively short saccular lung. Thus, we hypothesize that the saccular lung provides structural support when snakes form a cantilever. Without subsequent study, the saccular lung has long been proposed as a support for a snake's body, especially to help span gaps. To test this hypothesis, we determined whether the pressure in the saccular lung was significantly elevated when the snake was spanning a gap. Further, we reduced pressure in the lung to zero to determine whether this manipulation reduced the cantilever ability of the snake. The pressure in the saccular lung increased significantly as a snake neared its maximal cantilever distance. However, when we prevented the pressure in the saccular lung from rising above atmospheric pressure, the snake's maximal cantilever distance was not affected. Therefore, the pressure increase in the saccular lung as the snake approached its maximal spanning distance was probably caused by the contraction of skeletal muscles needed to support the body. We conclude that the saccular lung does not help snakes span gaps. We discuss whether the saccular lung helps support the body or maintain posterior body form.

Original languageEnglish
Pages (from-to)52-57
Number of pages6
JournalHerpetologica
Volume59
Issue number1
DOIs
Publication statusPublished - 2003 Jan 1

Fingerprint

snake
snakes
lungs
atmospheric pressure
contraction
skeletal muscle
muscle

Keywords

  • Dinodon
  • Saccular lung
  • Snake
  • Span

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Animal Science and Zoology

Cite this

Does the saccular lung affect the cantilever ability of snakes? / Lin, Yu Chung; Hwang, Ji-Chuu; Tu, Ming-Chung.

In: Herpetologica, Vol. 59, No. 1, 01.01.2003, p. 52-57.

Research output: Contribution to journalArticle

@article{c615cd513bed408ba45549335b8dab25,
title = "Does the saccular lung affect the cantilever ability of snakes?",
abstract = "Terrestrial, and especially arboreal, snakes can generally span a greater distance than aquatic snakes, which have a relatively short saccular lung. Thus, we hypothesize that the saccular lung provides structural support when snakes form a cantilever. Without subsequent study, the saccular lung has long been proposed as a support for a snake's body, especially to help span gaps. To test this hypothesis, we determined whether the pressure in the saccular lung was significantly elevated when the snake was spanning a gap. Further, we reduced pressure in the lung to zero to determine whether this manipulation reduced the cantilever ability of the snake. The pressure in the saccular lung increased significantly as a snake neared its maximal cantilever distance. However, when we prevented the pressure in the saccular lung from rising above atmospheric pressure, the snake's maximal cantilever distance was not affected. Therefore, the pressure increase in the saccular lung as the snake approached its maximal spanning distance was probably caused by the contraction of skeletal muscles needed to support the body. We conclude that the saccular lung does not help snakes span gaps. We discuss whether the saccular lung helps support the body or maintain posterior body form.",
keywords = "Dinodon, Saccular lung, Snake, Span",
author = "Lin, {Yu Chung} and Ji-Chuu Hwang and Ming-Chung Tu",
year = "2003",
month = "1",
day = "1",
doi = "10.1655/0018-0831(2003)059[0052:DTSLAT]2.0.CO;2",
language = "English",
volume = "59",
pages = "52--57",
journal = "Herpetologica",
issn = "0018-0831",
publisher = "Herpetologist's League Inc.",
number = "1",

}

TY - JOUR

T1 - Does the saccular lung affect the cantilever ability of snakes?

AU - Lin, Yu Chung

AU - Hwang, Ji-Chuu

AU - Tu, Ming-Chung

PY - 2003/1/1

Y1 - 2003/1/1

N2 - Terrestrial, and especially arboreal, snakes can generally span a greater distance than aquatic snakes, which have a relatively short saccular lung. Thus, we hypothesize that the saccular lung provides structural support when snakes form a cantilever. Without subsequent study, the saccular lung has long been proposed as a support for a snake's body, especially to help span gaps. To test this hypothesis, we determined whether the pressure in the saccular lung was significantly elevated when the snake was spanning a gap. Further, we reduced pressure in the lung to zero to determine whether this manipulation reduced the cantilever ability of the snake. The pressure in the saccular lung increased significantly as a snake neared its maximal cantilever distance. However, when we prevented the pressure in the saccular lung from rising above atmospheric pressure, the snake's maximal cantilever distance was not affected. Therefore, the pressure increase in the saccular lung as the snake approached its maximal spanning distance was probably caused by the contraction of skeletal muscles needed to support the body. We conclude that the saccular lung does not help snakes span gaps. We discuss whether the saccular lung helps support the body or maintain posterior body form.

AB - Terrestrial, and especially arboreal, snakes can generally span a greater distance than aquatic snakes, which have a relatively short saccular lung. Thus, we hypothesize that the saccular lung provides structural support when snakes form a cantilever. Without subsequent study, the saccular lung has long been proposed as a support for a snake's body, especially to help span gaps. To test this hypothesis, we determined whether the pressure in the saccular lung was significantly elevated when the snake was spanning a gap. Further, we reduced pressure in the lung to zero to determine whether this manipulation reduced the cantilever ability of the snake. The pressure in the saccular lung increased significantly as a snake neared its maximal cantilever distance. However, when we prevented the pressure in the saccular lung from rising above atmospheric pressure, the snake's maximal cantilever distance was not affected. Therefore, the pressure increase in the saccular lung as the snake approached its maximal spanning distance was probably caused by the contraction of skeletal muscles needed to support the body. We conclude that the saccular lung does not help snakes span gaps. We discuss whether the saccular lung helps support the body or maintain posterior body form.

KW - Dinodon

KW - Saccular lung

KW - Snake

KW - Span

UR - http://www.scopus.com/inward/record.url?scp=0037373819&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0037373819&partnerID=8YFLogxK

U2 - 10.1655/0018-0831(2003)059[0052:DTSLAT]2.0.CO;2

DO - 10.1655/0018-0831(2003)059[0052:DTSLAT]2.0.CO;2

M3 - Article

AN - SCOPUS:0037373819

VL - 59

SP - 52

EP - 57

JO - Herpetologica

JF - Herpetologica

SN - 0018-0831

IS - 1

ER -