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A morphological description of the Cetartiodactyla Larynx using geometric morphometrics

Eine morphologische Beschreibung des Kehlkopfs der Cetartiodactyla unter Verwendung geometrischer Morphometrie
Authors: Pichler, Helena;

A morphological description of the Cetartiodactyla Larynx using geometric morphometrics

Abstract

Die große Artenvielfalt der Cetartiodactyla, der Zweipaarhufer, bietet die ansonsten selten zu findende Möglichkeit zu untersuchen, wie sich phylogenetische Anpassungen in verschiedenen Lebensräumen entwickelt haben. Zu den Cetartiodactyla gehören nicht nur terrestrische, sondern auch aquatische und semiaquatische Arten. Somit sind nahezu alle möglichen Lebensräume erschlossen, was sich in der Morphologie deutlich widerspiegelt. Eines der wichtigsten Organsysteme in diesem Prozess ist der Kehlkopf (Larynx). Aufgrund ihrer Doppelfunktion als Schutz der Atemwege und zur Schallerzeugung hat den Larynx ihre Form im Laufe der Evolution beibehalten. Mit dem Übergang vom klassisch terrestrischen zu einem aquatischen Lebensstil, wie im Fall der Wale, wurde sie jedoch einem neuen evolutionärem Druck ausgesetzt, um ein Leben unter Wasser zu ermöglichen. Mit dieser Studie liefere ich die erste Formanalyse von 13 verschiedenen Kehlköpfen von Cetartiodactyla unter Verwendung geometrischer Morphometrie. Damit biete ich eine Beschreibung der evolutionären Veränderungen, die semiaquatische und aquatische Cetartiodactyla durchlaufen haben, um sich an das neue Medium, in dem sie vokalisieren, anzupassen. Außerdem habe ich untersucht, welche dieser Anpassungen auf eine phylogenetische Entwicklung zurückzuführen sind.

The wide variety of species displayed by the Cetartiodactyla taxon provides an opportunity to study how phylogenetic adaptations developed in different habitats. Including not only terrestrial orders, but also aquatic and semi-aquatic ones, artiodactyls have tapped into nearly every possible habitat, which modified their morphology distinctly. One of the most important organ systems in this process is the larynx. It’s dual function of air way protection and sound production has conserved its shape over the course of evolution, while still changing enough to provide a transition to life under water in the case of the aquatic cetartiodactyls, cetaceans. With this study I provide the first shape analysis of 13 different cetartiodactylan larynges using geometric morphometrics. I therefore offer a description of the evolutionary changes semi-aquatic and aquatic cetartiodactyls underwent to adapt to the new medium they vocalize in. Further, I investigated which of these adaptations are due to phylogenetic development.

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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