E-Dissertationen: Search
Now showing items 1-10 of 16
Funktionelle und morphologische Transformationen der Molaren bei frühen Hippomorpha im Hinblick auf den Mastikationsprozess
(2011-12-13)
Der Prozess der Mastikation ist besonders für herbivore Säugetiere von essentieller Bedeutung; hierbei spielen die Molaren eine Hauptrolle. Bei der fossil reichhaltig dokumentierten Gruppe der frühen Hippomorpha findet in ...
The “Atelocerata” – A vanishing hypothesis?: Molecular phylogeny of arthropods with focus on primary wingless hexapods
(2012-09-05)
Arthropods encompass more than three quarters of all described living species. Among arthropods, hexapods are the most abundant group and show an enormous diversity. To understand evolutionary processes of and within ...
Evolution of Sacoglossa (Opisthobranchia) with emphasis on their food (Ulvophyceae) and the ability to incorporate kleptoplasts
(2011-03-11)
Sacoglossa (Gastropoda) feed mainly on siphonous or siphonocladous green algae and are well-known for their ability to incorporate kleptoplasts from their food algae (Ulvophyceae). Some sacoglossans are capable of a ...
Neural dynamics of social behavior: An evolutionary and mechanistic perspective on communication, cooperation, and competition among situated agents
(2008)
Social behavior can be found on almost every level of life, ranging from microorganisms to human societies. However, explaining the evolutionary emergence of cooperation, communication, or competition still challenges ...
Nuptial feeding in the scorpionfly Panorpa vulgaris: ultimate and proximate causes
(2005)
In my thesis I was concerned with ultimate as well as with proximate aspects of nuptial feeding in the scorpionfly Panorpa vulgaris (Mecoptera: Panorpidae). Chapter I begins with the attempt to verify the ultimate function ...
Sperm competition and female remating rate in the scorpionfly Panorpa germanica, L. (Mecoptera, Panorpidae)
(2005)
Sperm competition can be a powerful selective force in the evolution of reproductive strategies and mating systems. In the last decades many insect species have been studied in terms of sperm competition (for reviews see ...
Molecular evolution, phylogenetics and biogeography in southern hemispheric bryophytes with special focus on Chilean taxa
(2005)
Researchers have long been fascinated by disjunct distribution patterns of plant and animal species. Especially the disjunctly distributed species occurring in the temperate Chilean and New Zealand rainforests of the ...
Die wasserspeichernden Federn der Flughühner (Pteroclididae): Funktionsmorphologie, Benetzungseigenschaften & technischer Nachbau
(2014-02-14)
Flughühner (Pteroclididae) leben in den Trockengebieten Afrikas und Asiens. Die Altvögel tragen über große Strecken Wasser zu ihren Jungen, das sie in ihren Brustfedern transportieren. Obwohl bisher schon einige Publikationen ...
Evolution der Multiresistenz bei Escherichia coli
(2005)
Ziel der Arbeit war es, am Model E. coli Spuren zu finden, wie sich im Laufe der Evolution Multiresistenz entwickelt und wie die verantwortlichen Resistenzgene im Organismus organisiert sind. Resistenten oder sogar ...
Evolutionsstadien der Kaufunktionen früher Artiodactyla
(2016-09-13)
Ein differenziertes Gebiss mit spezialisierten Molaren und deren Mastikation sind Merkmale der Säugetiere. Besonders die postcanine Bezahnung zeigt spezifische Anpassungen an eine effiziente Zerkleinerung der jeweiligen ...