Search for dissertations about: "alternative prey"

Showing result 16 - 20 of 31 swedish dissertations containing the words alternative prey.

  2. 16. Temporal and spatial variation in predation on roe deer fawns

    Author : Jonas Nordström; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Abstract : This thesis deals with variation in mortality of roe deer fawns, over time and in space, caused by red fox and Eurasian lynx predation in a boreal landscape. The thesis considers historic and recent effects of vole population dynamics on red fox predation on roe deer fawns, using long term time series from Grimsö Wildlife Research Area. READ MORE

  4. 17. Through the eyes of a woodpecker: Understanding habitat selection, territory quality and reproductive decisions from individual behaviour

    Author : Ola Olsson; Biodiversitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; reproductive success; territory quality; habitat selection; giving-up density; Bayesian processes; foraging; Picidae; lesser spotted woodpecker; Dendrocopos minor; conservation; Animal ecology; Djurekologi;

    Abstract : In this thesis I present some connections between foraging behaviour and reproductive success, time budget, tree species use, and habitat selection. The thesis is based upon both theoretical and empirical work. All empirical studies concern a south Swedish population of lesser spotted woodpeckers Dendrocopos minor, studied between 1990 and 1996. READ MORE

  5. 18. The significance of species groups for food web structure and functioning

    Author : Mikael Ohlsson; Anna Eklöf; György Barabas; Louis-Félix Bersier; Linköpings universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : In ecosystems across the world, species co-exist, compete, and consume, all while adapting to environmental conditions and disruptions. An important key to the puzzle of understanding how species will respond to changes in the ecosystems, caused by for example climate change, pollution, habitat destruction, and overexploitation, is what current roles species have in a larger context. READ MORE

  6. 19. On starlings and farming: population decline, foraging strategies, cost of reproduction and breeding success

    Author : Måns Bruun; Biologiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; breeding success; foraging strategies; intensification; agricultural methods; population decline; farmland bird; cost of reproduction; Animal ecology; Djurekologi;

    Abstract : The European Starling Sturnus vulgaris as many other farmland bird species has been declining during the last decades. The cause of these declines is generally believed to be changes with in agricultural methods affecting breeding and survival of birds. READ MORE

  7. 20. Across landscapes and seascapes : The movement ecology of diving and flying guillemots and gulls during breeding

    Author : Thomas J. Evans; Evolutionär ekologi; []
    Keywords : Uria aalge; Larus fuscus; Laridae; animal flight; foraging ecology; movement ecology; seabirds;

    Abstract : Most seabirds breed colonially, at which time they make central-place foraging trips. Parents must collect food both for themselves and for egg production/chick-rearing. READ MORE