Sökning: "life-history evolution"

Visar resultat 1 - 5 av 66 avhandlingar innehållade orden life-history evolution.

1. 1. Condition-dependence in life history evolution

   Författare :Foteini Spagopoulou; Alexei Maklakov; Lars Gustafsson; Russell Bonduriansky; Pat Monaghan; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Ageing; senescence; nongenetic inheritance; sex differences; condition-dependence; life history; trade-off; Ficedula albicollis; Caenorhabditis remanei; Telostylinus angusticollis; Biologi med inriktning mot zooekologi; Biology with specialization in Animal Ecology;

   Sammanfattning : Ageing is the progressive physiological deterioration that appears with increasing age and eventually leads to a decline in survival and reproduction. This physiological process is omnipresent across the tree of life, but the expected trajectory can widely vary between and within species. LÄS MER

3. 2. Life history evolution in a bivoltine butterfly

   Författare :Helena Larsdotter Mellström; Christer Wiklund; Klaus Fischer; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Bivoltine; Diapause; Lepidoptera; Life history; Mating system; Pheromone; Polyphenism; Population density; Sexual selection; Sperm competition; zoologisk ekologi; Animal Ecology;

   Sammanfattning : Evolution is not always straight-forward, as selection pressures may differ between different generations of the same species. This thesis focuses on the evolution of life history of the model species, the Green-veined White butterfly Pieris napi. In central Sweden P. napi has two generations per year. LÄS MER

4. 3. Experimental Evolution of Life-history : Testing the Evolutionary Theories of Ageing

   Författare :Hwei-yen Chen; Alexei Maklakov; Tracey Chapman; Uppsala universitet; []
   Nyckelord :senescence; ageing; longevity; mortality; experimental evolution; Caenorhabditis remanei; Biologi; Biology;

   Sammanfattning : Ageing reduces fitness, but how ageing evolves is still unclear. Evolutionary theory of ageing hinges on the fundamental principal that the force of natural selection declines with age. LÄS MER

5. 4. Age-specific trade-offs in life-history evolution

   Författare :Martyna K. Zwoinska; Alexei Maklakov; Marjo Saastamoinen; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; life history; trade-off; learning; aging; sex differences; dispersal; Caenorhabditis; Drosophila; Biologi med inriktning mot zooekologi; Biology with specialization in Animal Ecology;

   Sammanfattning : Trade-offs prevent selection from driving all fitness-enhancing traits towards values that would maximize fitness. Life-history trade-offs, such as the one between survival and reproduction are well-studied, yet trade-offs can also involve behavioural or cognitive traits. LÄS MER

7. 5. A functional genomic investigation of an alternative life history strategy : The Alba polymorphism in Colias croceus

   Författare :Alyssa Woronik; Christopher Wheat; Antonia Monteiro; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; alternative life history strategy; butterfly wing color; Alba; Colias; color polymorphism; dimorphism; life history traits; physiology; lipidomics; genomics; pooled sequencing; phylogenomics; RNA-Seq; Pool-Seq; populationsgenetik; Population Genetics;

   Sammanfattning : Life history traits affect the timing and pattern of maturation, reproduction, and survival during an organism’s lifecycle and are the major components influencing Darwinian fitness. Co-evolved patterns of these traits are known as life history strategies (LHS) and variation occurs between individuals, populations, and species. LÄS MER