Sökning: "lekområden"

Visar resultat 21 - 22 av 22 uppsatser innehållade ordet lekområden.

1. 21. Störs laxens lekvandring i en kraftverkspåverkad älvsträcka?

   L3-uppsats, SLU/Dept. Of Aquatic Resources

   Författare :Johan Lundgren; [2006]
   Nyckelord :lax; lekvandring; flödesförändringar; torrfåran; radiomärkta; pejling;

   Sammanfattning : 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. LÄS MER

3. 22. Havsöringens (Salmo trutta) och laxens (Salmo salar) lekområden och lekvandring i Vindelälven och Piteälven

   L3-uppsats, SLU/Dept. Of Aquatic Resources

   Författare :Caroline Pouchard; [2003]
   Nyckelord :havsöring; lekvandring; vindelälven; piteälven; radiotelemetri; vandringsbeteende; leklokal;

   Sammanfattning : 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. LÄS MER