Essays about: "trout"

Showing result 1 - 5 of 86 essays containing the word trout.

  1. 1. MODELLING THE SMOLT PRODUCTIVITY OF BROWN TROUT (SALMO TRUTTA) IN HAGA Å

    University essay from Göteborgs universitet / Instiutionen för biologi och miljövetenskap

    Author : Lukas Almgren; [2023-10-30]
    Keywords : Brown trout; Salmo trutta; Trout habitat score; THS; Haga å; electro-fishing survey;

    Abstract : The brown trout (Salmo trutta) is a facultatively anadromous species, some individuals migrate from the rearing environment in the rivers to the sea while other individuals stay in fresh water. To determine the suitability of a stream for juvenile trout the organization SGBALANST has developed what is called the "Trout habitat score" (THS) model. READ MORE

  3. 2. A parasitic bivalve affects the interaction between a native and an invasive salmonid

    University essay from Göteborgs universitet / Institutionen för biologi och miljövetenskap

    Author : Brander Isac; [2023-04-18]
    Keywords : Glochidia larvae; Infestation class; General dominance behavior; Dominant subordinate; Strikes;

    Abstract : The glochidia larvae of the freshwater pear mussel parasitize on juvenile brown trout during their maturation into tiny mussels. The parasitation has several negative impacts on the trout, one of the less studied being behavioral effects. READ MORE

  4. 3. Evaluating the effects of climate change on Arctic char : including impacts of brown trout competition

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

    Author : Ola Carlström; [2023]
    Keywords : arctic char; brown trout; climate change; diet; habitat use; temperature;

    Abstract : Climate change is predicted to increase the average global temperature with 1.5 °C between 2030 and 2052. The areas that are most vulnerable for climate change are the arctic regions. Arctic char (Salvelinus alpinus) is a cold-water salmonid species with the most northern distribution of all freshwater fish species. READ MORE

  5. 4. Effects of summer peaks on brown trout and Atlantic salmon growth and survival in hydropower-regulated Gullspång River

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

    Author : Oscar Hallberg; [2023]
    Keywords : hydropeaking; hydropower; fish; salmon; salmo salar; salmo trutta; summer; survival; growth; parr; fry; korttidsreglering; vattenkraft; salmonid; salmo salar; salmo trutta; tillväxt; överlevnad; lax; öring;

    Abstract : Daily demands for electrical power are met through sub-daily release of turbined water in the form of hydropeaking. Hydropeaking’s changes to stream flow are listed as a threat to biodiversity in river ecosystems as it causes rapid habitat alteration such as increased depth and velocity, affecting the species living downstream. READ MORE

  6. 5. Optimal Discharge from a Hydropower Plant for Fish Reproduction: An Aquatic Habitat Model

    University essay from Lunds universitet/Avdelningen för Teknisk vattenresurslära

    Author : Hugo Lindbäck; [2023]
    Keywords : Weighted Usable Area WUA ; minimitappning; HEC-RAS; salmo; Helge å; den nationella planen för omprövning av vattenkraft NAP ; Technology and Engineering;

    Abstract : Hydropower is the dominant source of electricity in Sweden, constituting 45% of the national supply. While pivotal for decarbonization and climate goals, its environmental impact on freshwater biodiversity is concerning. READ MORE