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Experimental morphology of the feeding mechanism in salamanders

โœ Scribed by Stephen M. Reilly; George V. Lauder

Publisher
John Wiley and Sons
Year
1991
Tongue
English
Weight
969 KB
Volume
210
Category
Article
ISSN
0362-2525

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โœฆ Synopsis

Abstract

The subarcualis rectus I muscle (SAR) in the feeding mechanism of four tiger salamanders (Ambystoma tigrinum) was removed early in ontogeny and these individuals were allowed to complete metamorphosis. This procedure resulted in postmetamorphic tiger salamanders which differed from control individuals in the size (and thus force generating capacity) of the SAR muscle. The experimental manipulation of muscle ontogeny allowed a test of previous hypotheses of SAR function in postmetamorphic individuals. Multivariate analysis of variance for kinematic variables measured from highโ€speed video records of feeding revealed that experimentally modified tiger salamanders did not protract the hyobranchial apparatus or project the tongue from the mouth during feeding. Removal of the SAR muscle resulted in significantly reduced hyobranchial elevation in the buccal cavity and reduced maximum tongue projection distance.

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