Sökning: "hybrid fitness"
Visar resultat 1 - 5 av 19 avhandlingar innehållade orden hybrid fitness.
1. Speciation - What Can be Learned from a Flycatcher Hybrid Zone?
Sammanfattning : Studies of hybrid zones offer important insights into the process of speciation. Much of the knowledge to be gained is dependent on an accurate estimation of the strength of pre- and post-zygotic isolation between hybridizing taxa. My results demonstrate that hybridization can variously affect different components of fitness. LÄS MER
2. Natural and Sexual Selection in a Natural Hybrid Zone of Ficedula Flycatchers
Sammanfattning : Speciation can be viewed as the formation of reproductive barriers between different populations. This thesis investigates patterns of natural and sexual selection shaping reproductive barriers between two hybridizing flycatchers (i.e. collared – and pied flycatchers). LÄS MER
3. Gene transfer by interspecific hybridization in bryophytes
Sammanfattning : The role of hybridization in evolution has been debated for more than a century regarding bryophytes (mosses, liverworts, and hornworts) as well as most other organisms. Bryophytes have haplodiplontic life cycles with a dominant haploid generation. LÄS MER
4. Hybrid zone dynamics, assortative mating, and migratory programmes in a willow warbler migratory divide
Sammanfattning : In this thesis I will compare and contrast the two willow warbler subspecies (Phylloscopus trochilus trochilus and P. t. acredula) with differing migratory phenotypes (or "migratype") in the context of their migratory divide and hybrid zone in central Sweden. Their migratory programs differ in the direction and distance traveled during migration. LÄS MER
5. I skuggan av NHL : en organisationsstudie av svensk och finsk elitishockey
Sammanfattning : I denna licentiatuppsats har svenska elitseriens respektive finska SM-liigas seriemodeller analyserats i ljuset av NHL:s dominans över den globala ishockeyn. Bakgrunden till problemområdet är att företrädarna för svensk respektive finsk elitishockey implementerat olikartade organisatoriska lösningar, trots att de utvecklats i kontexter med likartade sportmodeller och samhällsvillkor. LÄS MER