Sökning: "sex allocation"

Visar resultat 1 - 5 av 37 avhandlingar innehållade orden sex allocation.

1. 1. Metapopulations dynamics and sex-specific resource allocation in Silene dioica

   Författare :Elisabet Peedu; Pär Ingvarsson; Barbara Giles; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Silene dioica; Skeppvik Archipelago; Metapopulation Dynamics; Population Genetic Structuring; Genetic Diversity; Gene Flow; Sex-Specific Resource Allocation; Cost of Reproduction; Life-History Theory; Sexual Dimorphism; Reproductive Effort; biology; biologi; evolutionär genetik; evolutionary genetics; ekologisk botanik; Ecological Botany;

   Sammanfattning : Rising archipelagos provide unique settings for the study of the temporal and spatial dynamics of their biota. This offers the possibility to study the ecology and genetics of early successional processes; both between islands that differ in age and within islands when already established organisms have to keep pace with the changing environment. LÄS MER

3. 2. Sex Allocation and Maternal Effects in Lizzards

   Författare :Tobias Uller; Göteborgs universitet; []
   Nyckelord :;

   Sammanfattning : .... LÄS MER

4. 3. Tomorrow is yesterday: early-life conditions shape ectotherm life histories

   Författare :Alexander Hansson; Göteborgs universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; life history; ectotherm; temperature; development; sex; telomere; senescence;

   Sammanfattning : Life history theory seeks to explain the overwhelming diversity of resource allocation strategies in nature by exploring how evolutionary forces optimise survival and reproduction within an organism’s environment. Central to this theory is that resources are finite, and thus increased investment into one trait may reduce resources available for another trait. LÄS MER

5. 4. Reproduction in the Hermaphrodite Aeolidiella glauca - A Tale of Two Sexes

   Författare :Anna Karlsson; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Developmental biology; Aeolidiella glauca; simultaneous hermaphrodite; mating behaviour; mate choice; sex allocation; Utvecklingsbiologi; Developmental biology; Utvecklingsbiologi; Animal Ecology; zooekologi;

   Sammanfattning : This thesis focuses on reproduction in a simultaneous hermaphrodite with internal fertilization; the nudibranch Aeolidiella glauca. Unlike most other nudibranchs, where copulation is the rule, A. glauca was found to transfer sperm via external spermatophores that were attached to the partner's back. LÄS MER

7. 5. Living in a Variable Environment : Reproductive Decisions in Wild Bird Populations

   Författare :Mårten B. Hjernquist; Lars Gustafsson; Marcel Visser; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; evolutionary ecology; competition; sex allocation; paternity; EPP; inadvertent social information; migration; breeding density; territory quality; territory availability; great tit; blue tit; Ficedula albicollis; Biology; Biologi; Animal Ecology; zooekologi;

   Sammanfattning : In nature, environments are often variable and heterogeneous influencing ecological and evolutionary processes. This thesis focus on how animals interact with their environment and how that affects the reproductive decisions they make. LÄS MER