Sökning: "perch larvae"

Visar resultat 1 - 5 av 7 uppsatser innehållade orden perch larvae.

  1. 1. TROFISK ÖVERFÖRING OCH TOXISKA EFFEKTER AV (NANO-)PARTIKLAR FRÅN ELEKTRONISKT AVFALL

    Kandidat-uppsats, Göteborgs universitet / Institutionen för biologi och miljövetenskap; Göteborgs universitet / Institutionen för biologi och miljövetenskap

    Författare :Elvira Hagman; [2023-06-22]
    Nyckelord :;

    Sammanfattning : Today, nanoparticles (NPs) are being included in an increasing number of products, and with that comes the dispersion of NPs in the environment. However, the ecological impact of NPs remains largely unexplored, particularly in regards to real emissions with complex compositions of NPs and other pollutants. LÄS MER

  3. 2. Influence of reed (Phragmites australis) belts in the Baltic Sea archipelago on pike (Esox lucius) and other coastal fish species

    Master-uppsats, SLU/Dept. Of Aquatic Resources

    Författare :Niklas Niemi; [2020]
    Nyckelord :Reed; Phragmites; Pike; Baltic Sea; spatial distribution; habitat utilization; reed expansion; reed management;

    Sammanfattning : Eutrophication, near shore building and human disturbances by dredging and shore alteration have led to increased expansion of the common reed (Phragmites australis) in the archipelago of the Baltic Sea. Reed has an important ecological function such as nursery habitat for many fish species. LÄS MER

  4. 3. Stickleback diets in bays along the northen Baltic Sea

    Kandidat-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Författare :Douglas Skarp; [2019]
    Nyckelord :stickleback; perch larvae; predation; competition; bay;

    Sammanfattning : Coastal populations of perch (Perca fluviatilis) in the Baltic Sea has declined substantially the last decades while the populations of three-spined sticklebacks (Gasterosteus aculeatus) has increased rapidly during the same time period. Earlier studies have suggested that predation on perch larvae and or competition from sticklebacks are the causes behind the decline in perch. LÄS MER

  5. 4. Effekten av predatorinducerade morfologiska förändringar hos Rana temporaria

    Kandidat-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Författare :Lindy Tjärnlund Norén; [2017]
    Nyckelord :Rana temporaria; morphology; phenotypic plasticity; predator; induced defense; Rana temporaria; morfologi; fenotypisk plasticitet; predator; inducerat försvar;

    Sammanfattning : Phenotypic plasticity is the ability of an organism to express different phenotypes depending on the biotic or abiotic environment. In many cases, the response to the environment is beneficial to the individual and can therefore represent adaptive phenotypic plasticity. An example includes morphological and life-historical response to predators. LÄS MER

  7. 5. Storspiggens (Gasterosteus aculeatus) påverkan på abborryngel (Perca fluviatilis) via storleksberoende predation

    Kandidat-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Författare :Alexander Hjältén; [2016]
    Nyckelord :three-spined stickleback; perch; size-dependent predation; Baltic sea; intra guild predation;

    Sammanfattning : The costal populations of perch (Perca fluviatilis) in some parts of the Baltic Sea have been in decline for about two decades. Recruitment failure in the early larval stages has been put forward as a possible cause and the decline has also been suggested to coincide with increases in three-pined stickleback (Gasterosteus aculeatus) densities. LÄS MER