Essays about: "juvenile brown trout"

Showing result 1 - 5 of 12 essays containing the words juvenile brown 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. Pharmaceutical drugs in aquatic ecosystems : Does exposure to oxazepam alter behavior of brown trout (Salmo trutta) and consequently affect the dominance hierarchy?

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

    Author : Olivia Jirlén; [2022]
    Keywords : Dominance hierarchy; behavior; oxazepam;

    Abstract : A greater consumption of pharmaceutical drugs entails an increased concentration of active benzodiazepines in aquatic ecosystems. Consequently, aquatic organisms are experiencing altered behavior that may affect dominance hierarchies since social status (among other variables) is associated with behavioral traits. READ MORE

  5. 4. Dispersal and habitat use of juvenile brown trout (Salmo trutta) following egg stocking : -A case study in the river Rotälven, Sweden

    University essay from Karlstads universitet/Institutionen för miljö- och livsvetenskaper (from 2013)

    Author : Jonathan Larsson; [2022]
    Keywords : brown trout; egg stocking; dispersal; alevin; fry; parr; redd; habitat preference; Öring; romutsättning; spridning; yngel; parr; habitatpreferens;

    Abstract : Egg stocking in rivers and streams is a common measure to support and re-introduce salmonid populations. To ensure the success of egg stocking programs, knowledge of the early life stages of juveniles including dispersal ability and habitat preferences of fry is a prerequisite. READ MORE

  6. 5. How social behaviour in juvenile Brown trout (Salmo trutta) are regulated by social hierarchies and exposure to the benzodiazepine oxazepam

    University essay from SLU/Dept. of Forest Ecology and Management

    Author : Elin Johansson Kvarnström; [2022]
    Keywords : Behaviour; Brown trout; Dominance; Ecotoxicology; Exposure; Fish; Oxazepam; Pharmaceutical; Salmo trutta; Social status;

    Abstract : Improved global healthcare rises the production and consumption of human pharmaceuticals. Insufficient wastewater treatment systems and unregulated downstream impacts causes pharmaceutical contamination of surface waters with trace residues in countries covering all continents. READ MORE