Essays about: "piscivorous"

Showing result 1 - 5 of 8 essays containing the word piscivorous.

  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. Effects of whitefish speciation on piscivorous birds : A dietary study of piscivorous birds in central and northern Sweden

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

    Author : Erik Söderlund; [2021]
    Keywords : Coregonus lavaretus; piscivorous; birds; diet; speciation;

    Abstract : The ecological communities we observe today are a product of the bidirectional interactions between ecological and evolutionary processes. Although the effects of ecological processes on population divergence and speciation have been studied extensively, far less is known about the effects of divergence and speciation on ecological dynamics. READ MORE

  4. 3. Invasive round goby, Neogobius melanostomus - suitable prey for native cod, Gadus morhua?

    University essay from SLU/Dept. Of Aquatic Resources

    Author : Andreas Ljung; [2020]
    Keywords : Round goby; invasive species; cod; predator-prey inter-action;

    Abstract : Invasive species is a worldwide issue that is considered to be the one of the main reasons to losses of biodiversity. The round goby, Neogobius melanostomus, is an invasive species in the Baltic Sea that originates from the Black- and Caspian Sea. READ MORE

  5. 4. Impact of Great cormorant (Phalacrocorax carbo sinensis) on post-smolt survival of hatchery reared salmon (Salmo salar) and sea trout (Salmo trutta)

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

    Author : Carolina Gavell; [2018]
    Keywords : great cormorant; salmon; sea trout; sea trout; grey seal; post-smolt survival;

    Abstract : To compensate for the losses due to altered stream habitat large amounts of hatchery-reared Atlantic salmon (Salmo salar) and sea trout (Salmo trutta) are released into the Baltic Sea each year. During the last decades there have been an overall declining trend in the post-smolt survival of both hatchery reared and wild salmon in the Baltic Sea. READ MORE

  6. 5. The influence of northern pike on the diet of Eurasian perch

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

    Author : Karlberg Ylva; [2017]
    Keywords : Perca fluviatilis; Esox lucius; Coregonus lavaretus; trophic interactions; facilitation; Eurasian perch; northern pike; whitefish; Perca fluviatilis; Esox lucius; Coregonus lavaretus; trofiska interaktioner; facilitering; abborre; gädda; sik;

    Abstract : Top predators in aquatic ecosystems often have strong top-down effects on the ecosystem. Northern pike (Esox lucius) has been documented to cause whitefish (Coregonus lavaretus) populations to diverge into different ecomorphs. READ MORE