Sökning: "Carl Vigren"

Hittade 2 uppsatser innehållade orden Carl Vigren.

1. 1. Sexual dimorphism in the migratory dynamics of a land-locked population of brown trout (Salmo trutta) in central Sweden : a study at three temporal scales

   Master-uppsats, SLU/Dept. of Wildlife, Fish and Environmental Studies

   Författare :Carl Vigren; [2018]
   Nyckelord :trout; salmonid; salmo; trutta; migration; upstream; Storsjon; Storsjön; Damman; Dammån; regulated; fish ladder; behaviour; protandry;

   Sammanfattning : In this study I use a 56 years long dataset to study the migratory behaviours of a land-locked population of Brown trout (Salmo trutta) in the river Dammån, positioned in central Sweden. I found that there was a mean female-to-male sex ratio in the spawning-run of approximately 2.31 with an average 50% run date on the 29th of July. LÄS MER

3. 2. Microclimate impact of harvester trails in Picea abies continuous cover stands in boreal Sweden

   Kandidat-uppsats, SLU/Dept. of Forest Ecology and Management

   Författare :Carl Vigren; [2016]
   Nyckelord :gap dynamics; temperature; humidity; canopy cover; natural disturbance emulation;

   Sammanfattning : This study aimed to compare the microclimate 20 cm above the ground in the harvester trail to the inner sections of selectively felled Norway Spruce (Picea abies (L.) H. Karst) stands in the Jämtland province in boreal Sweden. LÄS MER