Search for dissertations about: "Animal ecology"
Showing result 21 - 25 of 274 swedish dissertations containing the words Animal ecology.
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21. Trade-offs between life history traits and immune defence in the collared flycatcher Ficedula albicollis
Abstract : This thesis examines the effects of reproductive effort on immune function and parasite resistance in breeding collared flycatchers, Ficedula albicollis. It also focuses on the role of the immune function in the trade-off between number and fitness of offspring. READ MORE
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22. Causes and consequences of quantitative trait variation for reproductive performance in hole nesting birds
Abstract : This thesis examines the causes and consequences of environmental variability and individual morphological differences on breeding success and survival in three hole nesting birds.An analysis of directional and stabilising natural selection in Collared Flycatchers (Ficedula albicollis) suggested that forces of selection acting on quantitative traits are weak and cannot explain the observed sexual size dimorphism (SSD) in this species. READ MORE
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23. Sexual selection in the collared flycatcher (Ficedula albicollis) : A life-history perspective
Abstract : This thesis integrates sexual selection theory with life history theory to elucidate the causes and consequences of variation in a male secondary sexual trait. The model organism, the collared flycatcher (Ficedula albicollis), was studied on Gotland, Sweden. READ MORE
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24. Mating behaviour and sexual selection in non-lekking fallow deer (Dama dama)
Abstract : 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. READ MORE
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25. Female Reproductive Strategies in the Ruff (Philomachus pugnax)
Abstract : Traditionally, females have been considered to be strictly monogamous. Today, we know that females in the majority of species actively seek out and mate with several males. Trying to understand female preferences, including what benefits mate choice entails, has been the focus of intense research during the last decades. READ MORE