Sökning: "cannibalism"

Visar resultat 16 - 19 av 19 avhandlingar innehållade ordet cannibalism.

  1. 16. A circular economy approach for sustainable feed in Swedish aquaculture: A nutrition and physiology perspective

    Författare :James Hinchcliffe; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; aquaculture; sustainability;

    Sammanfattning : One major challenge in aquaculture is the issue of fishmeal replacement as a protein source in aquafeeds. It is agreed that the rate of demand has now outpaced the rate of supply due to the rapid expansion of aquaculture. LÄS MER

  3. 17. Protein supply in organic broiler production using fast-growing hybrids : welfare and performance aspects

    Författare :Maria Eriksson; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Sammanfattning : The broiler's requirements of sulphur amino acids (AA) are high; however, currently available organic protein feedstuffs generally contain only low levels. According to national organic standards, fast-growing broilers in organic production are allowed to be slaughtered at 70 d, provided that their average growth rate does not exceed 50 g/day. LÄS MER

  4. 18. Dynamics of omnivorous crayfish in freshwater ecosystems

    Författare :Karin Olsson; Biologiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; crayfish; freshwater ecosystems; niche width; growth rate; stable isotope analysis; recruitment; RNA:DNA analysis; Ecology; food availability and quality; trophic position; population dynamics;

    Sammanfattning : In this thesis I examine the dynamics of crayfish in streams and lakes. I have studied the influence of abiotic and biotic factors on abundance, growth, trophic position, niche breadth, and recruitment of crayfish, by conducting field studies, an outdoor channel experiment and timeseries analysis. LÄS MER

  5. 19. Organizational creativity and psychological well-being : Contextual aspects on organizational creativity and psychological well-being from an open systems perspective

    Författare :Farida Rasulzada; Institutionen för psykologi; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; work resources and workload; organizational culture; Industrial psychology; leadership; climate; stress; organizational creativity and innovation; psychological well-being; Arbetspsykologi; industripsykologi;

    Sammanfattning : Organizational creativity and psychological well-being. Present day organizations in a globalized society are experiencing external challenges and changes more than ever before and in order to adapt and react to these changes creativity and innovation are seen as some of the most important means. LÄS MER