Sökning: "Carassius carassius"

Hittade 5 uppsatser innehållade orden Carassius carassius.

  1. 1. Changes in the fish community in Lake Tåkern, Sweden - a comparison between 1978-1979 and 2019

    Master-uppsats, Linköpings universitet/Biologi

    Författare :Manfred Skog; [2020]
    Nyckelord :Fish community; Shallow lakes; Test-fishing; Establishment of species; Crucian carp; Bream; Winter hypoxia;

    Sammanfattning : Climate changes alter species composition in both aquatic and terrestrial ecosystems. For establishment of species in a fish community, dispersal barriers, habitat structure and interactions between species act as a filter. LÄS MER

  3. 2. Kan musselextrakt (Mytilus edulis) inducera födosök hos omnivoren ruda, Carassius carassius (Linnaeus, 1758)?

    Kandidat-uppsats, Södertörns högskola/Miljövetenskap

    Författare :Ninél Sukovich; Jennifer Backman; [2016]
    Nyckelord :Musselmeal; Olfactory stimulation; Fish feed; Sustainable aquaculture; Sustainable development; Luktstimulerande; Fiskfoder; Musselmjöl; Hållbart vattenbruk; Hållbar utveckling;

    Sammanfattning : Over the last three decades there has been a significant increase in aquaculture production and the demand for farmed fish is predicted to rise further. More fish are being caught to become fishmeal in aquaculture, than for direct human consumption use, while a large number of fish stocks are being depleted. LÄS MER

  4. 3. Fish on drugs - an experimental study of crucian carp exposed to fluoxetine and a natural predator

    Master-uppsats, Lunds universitet/Miljövetenskaplig utbildning

    Författare :Jennie Örjes; [2015]
    Nyckelord :weight; sociability; boldness; predation; Esox lucius; Carassius carassius; pike; anti-depressant; fluoxetine; crucian carp; Earth and Environmental Sciences;

    Sammanfattning : Organisms in the aquatic environment face the challenge of exposure to environmental pollution by a multitude of pharmaceuticals. However, the potential for disruptive effects in non-target aquatic organism remains poorly understood. LÄS MER

  5. 4. Storskarvens artpreferenser och påverkan på Krankesjöns fiskfauna - kan partiell migration för mörten minska risken att bli prederad?

    Kandidat-uppsats, Lunds universitet/Miljövetenskaplig utbildning

    Författare :Jonathan Loive; [2013]
    Nyckelord :Storskarv; Mört; Sarv; Partiell migration; Migrerande; Residenta; Krankesjön; Earth and Environmental Sciences;

    Sammanfattning : This study was conducted in two lakes, Krankesjön and Vombsjön, located in Lund, Sweden. We went out for four weeks during April in order to scan for PIT-tags eaten by cormorants (Phalacrocorax carbo). These PIT-tags have been implanted in more than 12000 fishes and 12 species during the period between 2003 and 2012. LÄS MER

  7. 5. Predator-induced morphological defences in a freshwater snail

    Master-uppsats, Institutionen för ekologi, miljö och geovetenskap

    Författare :Annelie Lagesson; [2011]
    Nyckelord :;

    Sammanfattning : The ability of a certain genotype to express different phenotypes depending on variations in the environment is called phenotypic plasticity. Predator induced defences are among the most studied and wide spread examples of phenotypic plasticity. LÄS MER