Search for dissertations about: "Cost of reproduction"

Showing result 1 - 5 of 45 swedish dissertations containing the words Cost of reproduction.

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

    University dissertation from Måns Bruun, Departmen of Ecology, Animal Ecology, The Ecology Building S-223 62 Lund, Sweden

    Author : Måns Bruun; Lunds universitet.; Lund University.; [2002]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; breeding success; foraging strategies; intensification; agricultural methods; population decline; farmland bird; cost of reproduction; Animal ecology; Djurekologi;

    Abstract : Popular Abstract in Swedish Staren i jordbrukslandskapet Under de senaste tre decennierna har staren (Sturnu's vulgari's) i likhet med många andra fågelarter knutna till jordbrukslandskapet minskat kraftigt i antal, både i Sverige och i stora delar av västra och norra Europa. Det finn's flera tänkbara förklaringar till detta, men eftersom jordbruket under samma tidsperiod genomgått stora förändringar, ter det sig naturligt att söka efter svaren i dessa. READ MORE

  2. 2. Strategy games; on survival and reproduction

    University dissertation from Department of Ecology, Lund University

    Author : Helen Olofsson; Lunds universitet.; Lund University.; [2005]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Ekologi; Ecology; evolution of sexual reproduction; dormancy; game theory; migration; bet-hedging; Life history theory;

    Abstract : Classical evolutionary life history concerns questions such as optimal timing of maturation, life span and number of offspring. These questions have mostly been studied theoretically under the assumption that the environment is stable and without taking into account frequency and density dependence. READ MORE

  3. 3. Resource economy of carnivorous plants: Interactions between prey capture and plant performance in three subarctic Pinguicula species

    University dissertation from Plant Ecology, Ecology Building, SE-223 62 Lund

    Author : Magnus Thorén; Lunds universitet.; Lund University.; [1998]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Plant ecology; income breeder; capital breeder; supplementary feeding; reproductive effort; life-history; cost of reproduction; Växtekologi;

    Abstract : Popular Abstract in Swedish I min avhandling har jag studerat resursekonomin hos tre köttätande växter i fjällen. Arterna var vanlig tätört (Pinguicula vulgaris), fjälltätört (P. alpina) och dvärgtätört (P. villosa). READ MORE

  4. 4. Physiological trade-offs in reproduction and condition dependence of a secondary sexual trait

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Måns S. Andersson; Uppsala universitet.; [2001]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Developmental biology; Trade-offs; life history; immune ecology; cost of reproduction; costs of immune response; sexual selection; migration; moult; Newcastle disease; HbA1C; Ficedula albicollis; Utvecklingsbiologi; NATURAL SCIENCES Biology Organism biology Developmental biology; NATURVETENSKAP Biologi Organismbiologi Utvecklingsbiologi; Animal Ecology; zooekologi;

    Abstract : This thesis examines parental condition, how it is traded off against reproduction and how it is displayed in a secondary sexual trait. The studies were performed on nest-box breeding collared flycatchers Ficedula albicollis on the island of Gotland, in the Baltic Sea. READ MORE

  5. 5. Experimental Evolution of Life-history Testing the Evolutionary Theories of Ageing

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Hwei-yen Chen; Uppsala universitet.; [2014]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; senescence; ageing; longevity; mortality; experimental evolution; Caenorhabditis remanei; Biologi; Biology;

    Abstract : Ageing reduces fitness, but how ageing evolves is still unclear. Evolutionary theory of ageing hinges on the fundamental principal that the force of natural selection declines with age. READ MORE