Essays about: "Electrofishing abundance"

Found 4 essays containing the words Electrofishing abundance.

  1. 1. Evaluation of restoration efforts in Dalälven - conditions for survival rate of Salmo trutta and Salmo salar

    University essay from Uppsala universitet/Institutionen för biologisk grundutbildning

    Author : Ville Svärd; [2023]
    Keywords : Restoration; river; salmonids; benthic fauna;

    Abstract : Rivers are among the most anthropogenically affected ecosystems in the world by irrigation, transportation, channelizing, and hydropower. Habitat restorations have become a popular method to restore the heterogeneity and complexity of rivers aiming for improvement of biodiversity. READ MORE

  3. 2. Stream size determines densities of larger juvenile brown trout in mountain streams

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

    Author : Mattias Melin; [2021]
    Keywords : Habitat availability; juvenile brown trout; stream size; population structure;

    Abstract : The productivity or availability of juvenile habitats have theoretically been shown to determine size distributions of adult individuals and population abundance. Brown trout (Salmo trutta) is a species where adults may inhabit lakes and use connected streams for spawning and as nursery habitats for juveniles. READ MORE

  4. 3. Using eDNA to improve environmental monitoring for water bodies effected by hydropower in Sweden

    University essay from KTH/Hållbar utveckling, miljövetenskap och teknik

    Author : Elin Hellmér; [2018]
    Keywords : eDNA; environment; environmental monitoring; hydropower; index;

    Abstract : The aim of this report is to contribute to the base of knowledge on environmental monitoring by increasing understanding of how eDNA, electrofishing and sampling fishing may be used to examine fish biodiversity. It also aims at understanding if fish indexes developed within the Water Framework Directive reflect biodiversity, as well as the potential of eDNA data to serve as input to these indexes. READ MORE

  5. 4. Enumerating Atlantic salmon smolt production in River Vindelälven based on habitat availability and parr densities : consequences of using different density estimation methods

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

    Author : Stefan Ågren; [2010]
    Keywords : Salmo salar L.; Mapping; Juvenile nursery areas; Electrofishing abundance; Flow correlation; Population model;

    Abstract : Habitat mapping was conducted in the main stem of River Vindelälven in the autumn of 2009 along the salmon distribution area. The aim was to estimate the quantity of potential reproduction areas, including spawning and juvenile rearing habitats. The mapping included 61 km of various stream sections along the river length of 269 km. READ MORE