Search for dissertations about: "reproductive strategies"

Showing result 1 - 5 of 108 swedish dissertations containing the words reproductive strategies.

2. 1. Evolutionary Consequences of Reproductive Strategies : Testing Theory on Sex and Reproductive Gene Evolution in the Fungal Model Neurospora

   Author : Kristiina Nygren; Hanna Johannesson; Tatiana Giraud; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Biology; Biologi; Biology with specialization in Evolutionary Genetics; Biologi med inriktning mot evolutionär genetik;

   Abstract : In this thesis, I used the filamentous ascomycete genus Neurospora as a model to test theoretical predictions on the evolutionary consequences of different reproductive strategies and reproductive gene evolution. The genus Neurospora contains taxa representing a diversity of reproductive strategies, and here I constructed a phylogeny by which I was able to show that several independent transitions in reproductive mode have occurred in the evolutionary history of the genus. READ MORE

4. 2. "If really we are committed things can change starting from us providers" Improving postpartum care : A facilitation intervention at government-owned health institutions in a low-resource suburb in Dar es Salaam, Tanzania

   Author : Eunice Pallangyo; Pia Olsson; Carina Källestål; Columba Mbekenga; Christine Rubertsson; Marie Berg; Uppsala universitet; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES;

   Abstract : Globally, postpartum care is a neglected area in the continuum of maternal and newborn services. Facilitation interventions focusing on addressing local problems report positive results in improving the health of mothers and newborns in low-resource settings. READ MORE

5. 3. Pollinators, Enemies, Drought, and the Evolution of Reproductive Traits in Primula farinosa

   Author : Per Toräng; Jon Ågren; Johan Ehrlén; Rebecca Irwin; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Ecology; Alternative reproductive strategies; climate change; facilitation; floral display; flowering phenology; frequency-dependent selection; genetic diversity; life-history strategies; local adaptation; pollination; predation; Primula farinosa; reproductive effort; soil disturbance; stochastic growth rate; Ekologi;

   Abstract : In this thesis, I combined comparative and experimental approaches to examine selection on reproductive traits and population differentiation in the insect-pollinated, self-incompatible, perennial herb Primula farinosa. More specifically, I (1) determined whether the effects of floral display and interactions with pollinators and seed predators, and plant reproductive success were frequency-dependent and affected by surrounding vegetation context, (2) examined the consequences of intermittent drought years on population dynamics using numerical simulations based on demographic data collected over seven years, (3) analyzed among-population differentiation in flowering phenology and reproductive allocation, and its relationship to soil-depth at the site of origin. READ MORE

6. 4. Female Reproductive Strategies in the Ruff (Philomachus pugnax)

   Author : Katherine Thuman; Fredrik Widemo; Robert Montgommery; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Ecology; Ekologi; Terrestrial; freshwater and marine ecology; Terrestisk; limnisk och marin ekologi; Animal Ecology; zooekologi;

   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

7. 5. Strategies for infertility treatment in men with azoospermia

   Author : Göran Westlander; Göteborgs universitet; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Azoospermia; delivery outcome; Doppler flow imaging; intracytoplasmic sperm injection; Klinefelter s syndrome; sperm retrieval; ultrasonography;

   Abstract : Introduction: Historically, treatment of severe male infertility has been restricted. With the introduction of intracytoplasmic sperm injection (ICSI), infertile men have been given new hope of achieving genetic fatherhood. READ MORE