Search for dissertations about: "nest success"

Showing result 1 - 5 of 21 swedish dissertations containing the words nest success.

  2. 1. Habitat selection, nest predation and conservation biology in a Black-tailed Godwit (Limosa limosa) population

    Author : Tomas Johansson; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Developmental biology; Black-tailed godwit; Limosa limosa; nest site selection; nest predation; philopatry; risk analysis; Utvecklingsbiologi; Developmental biology; Utvecklingsbiologi; populationsbiologi; Population Biology;

    Abstract : This thesis focuses on a black-tailed godwit (Limosa limosa) population, consisting of 35-40 pairs, that breeds on a grazed shore meadow on SE Gotland, Sweden. The small size of the population makes it more prone to extinction due to chance events, than a larger population.The godwits showed microhabitat preferences when choosing nest sites. READ MORE

  4. 2. Female choice and paternal care in the fifteen-spined stickleback, Spinachia spinachia

    Author : Sara Östlund-Nilsson; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Developmental biology; fifteen-spined stickleback; spinachia spinachia; female choice; paternal care; nest building; ornament; fanning; Utvecklingsbiologi; Developmental biology; Utvecklingsbiologi; Animal Ecology; zooekologi;

    Abstract : In the fifteen-spined stickleback, Spinachia spinachia, males provide females with direct benefits by fanning, cleaning and guarding the offspring. Males announce their parental skills through intense body shakes during courtship. Females preferred to mate with more intensely shaking males. READ MORE

  5. 3. Varying unemployment experiences? : the economy and mental well-being

    Author : Mattias Strandh; Umeå universitet; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; unemployment; employment; psychosocial; mental well-being; economy; employment commitment; nest-leaving; unemployment benefits;

    Abstract : From being an unemployment success story, Sweden was during the 1990s thrown into a European normality, with apparent high and persistent unemployment. This has made unemployment a central issue in the Swedish public debate as a social problem directly affecting hundreds of thousands of individuals. READ MORE

  6. 4. Female coloration, egg carotenoids and reproductive success: gobies as a model system

    Author : P. Andreas Svensson; Trond Amundsen; Jonathan Blount; Trondheim NTNU Department of Biology; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Akvatisk ekologi; Aquatic Ecology; Evolutionary Biology; Evolutionsbiologi;

    Abstract : In two-spotted gobies (Gobiusculus flavescens), females develop an orange belly as they approach sexual maturity. Toward the end of the single breeding season, males become rare and females compete for spawnings. Nest-holding males then prefer females with more colourful bellies and this trait has been suggested to act as a female ornament. READ MORE

  7. 5. Sexual selection in Pomatoschistus – nests, sperm competition, and paternal care

    Author : Ola Svensson; Charlotta Kvarnemo; Sigal Balshine; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Female choice; Filial cannibaism; Gobiidae; Nests; Paternal care; Pomatoschistus microps; Pomatoschistus minutus; Sexual selection; Sperm competition; Teleostei; Terrestrial; freshwater and marine ecology; Terrestisk; limnisk och marin ekologi;

    Abstract : Sexual selection arises through variation in reproductive success. This thesis investigates different aspects important in sexual selection, namely nest building, sperm competition, paternity and paternal care, and their mutual interrelationships. READ MORE