Sökning: "mating success"

Visar resultat 1 - 5 av 35 avhandlingar innehållade orden mating success.

1. 1. Genetic Structuring and the Evolution of Lekking Behaviour in the White-bearded Manakin, Manacus manacus

   Författare :Lisa Shorey; David McDonald; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biology; Lek Evolution; Manacus manacus; White-bearded Manakin; Genetic Relatedness; Mating Success; Male Characteristics; Behaviour; Biologi; Biology; Biologi; populationsbiologi; Population Biology;

   Sammanfattning : Genetic structuring is common in natural populations. It is important to identify and consider population structure when studying evolutionary processes. Recently, the discovery of genetic structuring in some lekking bird species has opened up new perspectives on our understanding of the evolution of lek mating systems. LÄS MER

3. 2. The evolution of territoriality in butterflies

   Författare :Martin Bergman; Christer Wiklund; Ronald Rutowski; Stockholms universitet; []
   Nyckelord :territoriality; Lepidoptera; sexual selection; mating success; mate locating behaviour; resource-holding potential; motivation; courtship solicitation; NATURAL SCIENCES; NATURVETENSKAP; zoologisk ekologi; Animal Ecology;

   Sammanfattning : Competition over mating opportunities is a conspicuous characteristic of animal behaviour. In many butterfly species the males establish territories in places advantageous for encountering females. This thesis addresses questions about how territoriality has evolved and is maintained in butterflies. LÄS MER

4. 3. Female reproductive strategies and sexual conflicts in a polygynous mating system

   Författare :Maria Sandell; Biologiska institutionen; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; female aggression; nestling feeding; intraspecific brood parasitism; mating system; parental investment; sexual conflict; intrasexual competition; Animal ecology; Djurekologi;

   Sammanfattning : In this thesis, I have investigated conflicts of interest in the facultatively polygynous European starling (Sturnus vulgaris) with a focus on female reproductive strategies. The extent to which males provided parental care was a key issue in understanding the mating system of the starling. LÄS MER

5. 4. Mating behaviour and sexual selection in non-lekking fallow deer (Dama dama)

   Författare :David Stenström; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Ecology; Fallow deer; mating behaviour; sexual selection; scent marking; plasticity of behaviour; antler asymmetry; Ekologi; Terrestrial; freshwater and marine ecology; Terrestisk; limnisk och marin ekologi; Animal Ecology; zooekologi;

   Sammanfattning : This thesis examines both behavioural and morphological traits influencing male mating success in non-lekking fallow deer (Dama dama). The thesis contains results based on behavioural observations and experimental studies made on Öland and around Uppsala, Sweden. LÄS MER

7. 5. Breeding System Evolution and Pollination Success in the Wind-Pollinated Herb Plantago maritima

   Författare :Emil Nilsson; Jon Ågren; Pia Mutikainen; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biology; Breeding system; mating system; gynodioecy; male sterility; reproductive output; self-compatibility; self-incompatibility; wind-pollination; founder event; genetic structure; Biologi; Biology; Biologi; ekologisk botanik; Ecological Botany;

   Sammanfattning : In this thesis, I examined variation in sex expression and mating patterns in the sexually polymorphic, wind-pollinated herb Plantago maritima. With a combination of field studies, greenhouse experiments, and genetic analyses, I (a) examined factors influencing sex ratio variation in gynodioecious plants (in which hermaphrodites and females coexist), (b) discovered variation in breeding system, (c) investigated density-dependence of seed production, and (d) documented genetic variation within and among populations close to the northern range margin in Europe. LÄS MER