Essays about: "Perca fluviatilis"

Showing result 1 - 5 of 29 essays containing the words Perca fluviatilis.

  1. 1. Ecological impacts of dam removal in Swedish inland waters : Effects on water chemistry and fish demography

    University essay from Karlstads universitet/Fakulteten för hälsa, natur- och teknikvetenskap (from 2013)

    Author : Johanna Ekman; [2023]
    Keywords : biology; ecology; dam removal; Sweden; impact; inland waters; ecosystem; water chemistry; fish demography; Perca fluviatilis; European perch; biologi; ekologi; dammutrivning; Sverige; påverkan; inlandsvatten; ekosystem; vattenkemi; fiskdemografi; Perca fluviatilis; abborre;

    Abstract : Dams play an important role in our society, but their negative impacts on aquatic ecosystems have led to a need for conservation efforts to mitigate the negative effects. In some instances, dam removal has been suggested to be the most economically and ecologically beneficial restoration method to improve longitudinal connectivity. READ MORE

  3. 2. Human Exposure to Per- and Polyfluoroalkyl : Substances through Fish Consumption

    University essay from Örebro universitet/Institutionen för naturvetenskap och teknik

    Author : Welmoed Nauta; [2023]
    Keywords : Per- and polyfluoroalkyl substances; Human exposure; Fish consumption; Glasbruket; Target analysis; Mass balance analysis;

    Abstract : Human exposure to per- and poly-fluoroalkyl substances (PFAS) occurs mainly through two pathways, inhalation and ingestion. Dietary exposure to persistent organic pollutants (POPs), including PFAS, is driven mainly by the consumption of foods of marine or terrestrial animal origin. READ MORE

  4. 3. Experimental removal of anoxic hypolimnion conditions in a lake increases perch growth

    University essay from Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Author : Felix Torsson; [2021]
    Keywords : Eurasian perch; oxygen limitation; individual condition; growth and stomach fullness.;

    Abstract : Global warming leads to an increased browning of lakes across the northern hemisphere. This browning can due to benthic light-limitation cause hypoxic bottom conditions which can have negative impact on the fish production in the northern lakes. READ MORE

  5. 4. Development of northern pike (Esox lucius) populations in the Baltic Sea, and potential effects of grey seal (Halichoerus grypus) predation

    University essay from SLU/Dept. Of Aquatic Resources

    Author : Rebecka Svensson; [2021]
    Keywords : diet analysis; ; marine mammals; predator-prey; socio-economic; sport fishing; recreational fisheries;

    Abstract : Worldwide, marine mammal populations are increasing after considerable efforts to turn the downward trends caused by hunting, accidental mortality and pollution. The ecosystem effects from the increases of these top predators may be pronounced, but are in most cases poorly known. READ MORE

  6. 5. Beteendeeffekter av antidepressivt läkemedel på abborre (Perca fluviatilis) : socialt och aktivt beteende undersökts genom att kombinera behandlingar med oxazepam, temperatur och predationstryck

    University essay from SLU/Dept. of Wildlife, Fish and Environmental Studies

    Author : Oskar Karlsson; Svante Knutsen; [2020]
    Keywords : antidepressiva läkemedel; oxazepam; abborre;

    Abstract : Användandet av antidepressiva och ångestdämpande läkemedel, som ex. oxazepam, ökar i samhället vilket kan leda till höga halter i våra vattendrag. Tidigare studier har visat att abborrar som blir utsatta för miljörelevanta koncentrationer av oxazepam ändrar sitt beteende. READ MORE