Essays about: "lekvandring"
Found 5 essays containing the word lekvandring.
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1. CBA of environmental projects within hydropower
University essay from KTH/EnergiteknikAbstract : Hydropower is a fundamental pillar in the Swedish energy system and accounts for a large part of the Swedish electricity production. The regulation power is also essential for balancing the grid load. READ MORE
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2. The impact of abiotic factors on daily spawning migration of Atlantic salmon (Salmo salar) in two north Swedish rivers
University essay from SLU/Dept. of Wildlife, Fish and Environmental StudiesAbstract : Atlantic salmon (Salmo salar) depends on two major migrations to fulfil their life cycle, from their birth place in rivers to sea, and back upstream the river again to spawn. Salmon stocks have been heavily reduced during the last century due to human activities such as hydropower and timber floating. READ MORE
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3. Laxens uppströmsvandring i den restaurerade och flödesreglerande Umeälvens nedre del
University essay from SLU/Dept. of Wildlife, Fish and Environmental StudiesAbstract : The expansion of hydroelectric power has negatively affected the Baltic stock of Atlantic salmon (Salmo salar L.). To enable spawning migration of salmon in flow controlled rivers with intact wild stocks, bypass channels and resting pools with smaller flows are constructed to help salmonids in their migration upstream. READ MORE
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4. Störs laxens lekvandring i en kraftverkspåverkad älvsträcka?
University essay from SLU/Dept. Of Aquatic ResourcesAbstract : The upstream spawning migration of Atlantic salmon (Salmo salar) at the confluence area between the power-station outlet and the bypass-channel in river Umeälven (flow 430 m3s-1) was compared in 2004 and 2005, two years with different experimental flow-regimes. In 2004 the water flow in the bypass-channel was altered during the day with increased flows during the nights while the water flow in 2005 mainly was altered between the weekdays and weekends. READ MORE
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5. Havsöringens (Salmo trutta) och laxens (Salmo salar) lekområden och lekvandring i Vindelälven och Piteälven
University essay from SLU/Dept. Of Aquatic ResourcesAbstract : The population of seatrout and salmon are threatened by over-fishing in the sea and loss of spawning and growing habitats caused by logging activities in many swedish rivers. The knowledge of the spawning migration and the habitat use of the seatrouts and salmon are limited. READ MORE
