Sökning: "crucian carp"

Hittade 5 uppsatser innehållade orden crucian carp.

  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. Direct hollow fibre liquid phase membrane extraction and LC-MS determination of selective serotonin reuptake inhibitors in fish tissue

    Magister-uppsats, Lunds universitet/Kemiska institutionen

    Författare :Henrik Engström; [2013]
    Nyckelord :HF-LPME; LC-MS; SSRI; selective; fish; analytical chemistry; analytisk kemi; Chemistry;

    Sammanfattning : Selective serotonin reuptake inhibitors (SSRIs) have been found in waste water treatment plant effluents and surface water at detectable concentrations. Although the medical effects and side effects of pharmaceuticals and personal care products are investigated through safety and toxicology studies the potential environmental impacts are less studied, and information concerning ecotoxicological risks and the distribution in sludge, surface water and water living organisms is rather scarce. LÄS MER

  7. 5. The effects of water chemistry on fish species distribution : a comparison between isolated and connected lakes in northern Sweden

    L3-uppsats, SLU/Dept. of Forest Ecology and Management

    Författare :Johanna Öhman; [2004]
    Nyckelord :fish; water chemistry; isolation; anoxia; dissolved oxygen; DO; acidity; pH; pike; perch; roach; crucian carp; stickleback; bream; bleak; ide; ruffe; Västerbotten; northern Sweden; ice; winter; lake;

    Sammanfattning : The correlation between water chemistry and fish species distribution was examined in forty small, coastal lakes in northern Sweden. Lakes were fished in summer and water chemistry sampled mainly in late winter. Twenty out of the forty lakes were isolated from other water bodies and twenty had a direct connection to the sea. LÄS MER