Nov 3, 2017

Functional morphology of terrestrial prey capture in salamandrid salamanders

The Journal of Experimental Biology
Charlotte M Stinson, Stephen M Deban

Abstract

Salamanders use the hyobranchial apparatus and its associated musculature for tongue projection on land and for suction feeding in water. Hyobranchial apparatus composition and morphology vary across species, and different morphologies are better suited for feeding in aquatic versus terrestrial environments. We hypothesize that differences in hyobranchial morphology result in functional trade-offs in feeding performance. We predict that semi-aquatic and aquatic salamandrids with hyobranchial morphology suited for aquatic feeding will have lower performance, in terms of tongue-projection distance, velocity, acceleration and power, compared with terrestrial salamandrids when feeding in a terrestrial environment. We found that semi-aquatic and aquatic newts had lower velocity, acceleration and muscle-mass-specific power of tongue projection when compared with the terrestrial salamanders Chioglossa lusitanica and Salamandra salamandra The fully aquatic newt, Paramesotriton labiatus, has a robust, heavily mineralized hyobranchial apparatus and was unable to project its tongue during terrestrial feeding, and instead exhibited suction-feeding movements better suited for aquatic feeding. Conversely, terrestrial species have slender, ca...Continue Reading

  • References24
  • Citations1

References

  • References24
  • Citations1

Citations

Mentioned in this Paper

Newts
Taricha
Congenital Macroglossia
Projection Defense Mechanism
Chioglossa lusitanica
Macroglossia
Science of Morphology
Set of Muscles
Buccal Fat Pad
Research Project

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