Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 4 of 4 for “"sexuelle Selektion"”.
-
Die Evolution des Gesanges der Acrocephalinae (Hippolais, Acrocephalus und Chloropeta) unter Einbeziehung der Phylogenie und morphologischer, ökologischer und sozialer Faktoren
… wichtigsten Einfluss haben die Phylogenie und sexuelle Selektion. Durch die vermehrte sexuelle Funktion des Gesanges bei ziehenden Acrocephalinae unterscheiden sich diese in Repertoiregröße und Singplatz von nicht ziehenden Arten. Die bisher vermuteten Beziehungen zwischen der Körpergröße und …
-
Evolution of the pheromone communication system in the European Beewolf Philanthus triangulum F. (Hymenoptera: Crabronidae)
Darwin’s theory of sexual selection explains the evolution of flamboyant male traits through female choice. It does not, however, address the question why males typically court and females choose. This asymmetry is now thought to be the result of the dichotomy in reproductive expenditures: Females …
-
Sex-specific reproductive strategies in redfronted lemurs (Eulemur fulvus rufus, Primates, Lemuridae)
The number of males in animal groups is an essential determinant of male and female reproductive strategies. Females may benefit from living with several males, whereas males generally strive to monopolize a group of females. Due to male intrasexual competition, the sex ratio of groups of …
-
Female preferences, paternity and fitness: A combined morphometric/molecular genetic study on Poecilia latipinna and Poecilia formosa
Mate preferences represent an adaptive choice when costs associated with reproduction can be alleviated through gaining direct or indirect benefits from choosing the better mate. Female poeciliid fishes do show clear mate preferences for certain males although males in this highly promiscuous taxon …