Essays about: "fish attraction"

Showing result 1 - 5 of 7 essays containing the words fish attraction.

  1. 1. Evaluating an increased spill regime as a management tool to improve downstream passage of salmon smolt

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

    Author : Mattias Hansson; [2022]
    Keywords : hydraulic modeling; hydroacoustic telemetry; time to event analysis; hydraulisk modellering; överlevnadsanalys; hydroakustisk telemetri;

    Abstract : The anadromous Atlantic salmon (Salmo salar) is dependent on river connectivity to reach spawning and rearing habitats in rivers. Most rivers are today fragmented by artificial barriers such as hydroelectric powerplants (HEP) which impede this migratory movement. READ MORE

  3. 2. Hydraulic modelling at Finsjö Övre hydropower plant : Study for evaluation of a fishway's attractiveness

    University essay from Umeå universitet/Institutionen för tillämpad fysik och elektronik

    Author : Eddie Blomström; [2022]
    Keywords : fishway; flow; hydraulics; HEC-RAS;

    Abstract : In connection with the government’s approval on the proposed national plan (NAP) in 2019, it has become highly topical to find solutions problems regarding fish migration in Swedish watercourses. At Finsjö Övre hydropower plant in Emån, a new type of fishway is planned to be installed and evaluated starting at the end of 2022. READ MORE

  4. 3. Snow cover related camouflage mismatch decreases survival

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

    Author : Pieter Otte; [2022]
    Keywords : climate change; snow cover; seasonal colour coat; crypsis; mismatch; camera trap; survival analysis;

    Abstract : Climate change is expected to decrease winter severity at high latitudes, resulting in reduced days of snow cover. Several mammalian and avian species in the northern hemisphere express a seasonal colour coat (SCC) making them white in winter periods and brown or dark in summer. READ MORE

  5. 4. Method Development for Sample Preparation of Fish for Non-target Analysis of Hydrophobic Organic Pollutants

    University essay from Örebro universitet/Institutionen för naturvetenskap och teknik

    Author : Bergdís Björk Bæringsdóttir; [2020]
    Keywords : ;

    Abstract : Monitoring methods for environmental pollutants are mostly performed with targeted analysis which relies on predetermined compounds. This can cause an underestimation of possible toxicants as it might not detect undiscovered compounds such as breakdown products of other chemicals. READ MORE

  6. 5. Utvärdering av lockmedel för marklevande predatorer under midvintermånader i Norrbottens inland

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

    Author : Martin Johansson; [2014]
    Keywords : raccoon dog; Nyctereutes procyonoides; scent lure; self triggering cameras;

    Abstract : Many invasive species propose a big threat against the native fauna in the area that they colonise. Today the raccoon dog (Nyctereutes procyonoides) is speeding from Finland over the border in to northern Sweden. A project to stop the spread and eliminate the individuals that already have established was initiated in the autumn of 2008. READ MORE