Sökning: "Biology with specialization in Animal Ecology"

Visar resultat 21 - 25 av 27 avhandlingar innehållade orden Biology with specialization in Animal Ecology.

1. 21. Adaptation and plasticity within and across generations

   Författare :Zuzana Sekajova; Martin Lind; Lesley Lancaster; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Phenotypic plasticity; nongenetic inheritance; environmental variation; Caenorhabditis elegans; Caenorhabditis remanei; life history; Biologi med inriktning mot zooekologi; Biology with specialization in Animal Ecology;

   Sammanfattning : The environment is seldom stable but often changes from one state to another and in order to survive and reproduce organisms need to respond to those changes. If the change is fast, genetic adaptations may not evolve quickly enough and organisms must adopt other strategies, such as phenotypic plasticity. LÄS MER

3. 22. Sexual Selection and Adaptation to Novel Environments

   Författare :Ivain Martinossi-Allibert; David Berger; Göran Arnqvist; Lukas Schärer; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Sexual selection; Environmental change; Sexual conflict; Environmental stress; Adaptation; Adaptive landscape; Biologi med inriktning mot zooekologi; Biology with specialization in Animal Ecology;

   Sammanfattning : The work included in this thesis aims at exploring the environmental sensitivity of benefits and costs of sexual selection through a combined empirical and theoretical effort, to increase our understanding of the impact of environmental change on sexually reproducing populations.Can sexual selection promote adaptation to novel environments? Sexual selection for good genes should accelerate adaptation by granting higher reproductive success to individuals of high genetic quality. LÄS MER

4. 23. 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

5. 24. Sexual conflict, sexual selection, and genetic variance in fitness

   Författare :Karl Grieshop; Göran Arnqvist; David Berger; Jacek Radwan; Uppsala universitet; []
   Nyckelord :Biologi med inriktning mot zooekologi; Biology with specialization in Animal Ecology;

   Sammanfattning : Understanding sex-specific genetic variance for fitness is of fundamental importance to our understanding of evolution. This thesis presents the findings of empirical investigations into sex-specific genetic variance in fitness. LÄS MER

7. 25. Population divergence at different spatial scales in a wide-spread amphibian

   Författare :Patrik Rödin Mörch; Anssi Laurila; Jacob Höglund; Bengt Hansson; Uppsala universitet; []
   Nyckelord :Adaptive divergence; environmental gradients; genomics; life-history; amphibians; Biologi med inriktning mot zooekologi; Biology with specialization in Animal Ecology;

   Sammanfattning : To study the distribution of genetic and phenotypic variation in different environments and at different spatial scales is important in order to understand the process of local adaptation and how populations will respond to future climate change. In my thesis I study populations of moor frogs (Rana arvalis) at different spatial scales, first along a 1700 km latitudinal gradient (Paper I, II, IV) and, second, in a system of inter-connected wetlands (III, IV). LÄS MER