Essays about: "seasonal migration"

Showing result 16 - 20 of 32 essays containing the words seasonal migration.

  1. 16. Factors affecting timing of seasonal migration by roe deer (Capreolus capreolus)

    University essay from SLU/Dept. of Ecology

    Author : Linda Höglund; [2018]
    Keywords : roe deer; Capreolus capreolus; seasonal migration; home range; NDVI;

    Abstract : Roe deer (Capreolus capreolus) live in diverse environmental conditions due to their wide distribution. Because of their high variety of living conditions it is common that some individuals in a population have different summer and winter areas. READ MORE

  3. 17. 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

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

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

    Abstract : 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. READ MORE

  4. 18. Genetics of bird migration : Study on East Siberian willow warblers (Phylloscopus trochilus)

    University essay from Uppsala universitet/Institutionen för biologisk grundutbildning

    Author : Kristaps Sokolovskis; [2017]
    Keywords : birds; willow warblers; phylloscopus trochilus; leaf warblers; migration; genetics; stable isotopes; eastern siberia;

    Abstract : Seasonal long-distance bird migration between wintering and breeding grounds is oneof the most remarkable phenomena in the history of life on earth. Migration strategies androutes vary greatly. Some birds migrate in social groups whilst others migrate alone at night,some cross few hundreds of km whilst others cover thousands of km. READ MORE

  5. 19. Goat production in the tropics and mitigation to feed shortage in different production systems in Eastern, Tanzania

    University essay from SLU/Dept. of Animal Nutrition and Management

    Author : Peter Ruvuga; [2016]
    Keywords : pastoralists; small scale intensive system; other challenges; previous project versatility;

    Abstract : Seasonal feed fluctuation is the common problem among livestock keepers in the tropics. Even though there have been several intervention programs to the farm level little is known after these projects had phased out. READ MORE

  6. 20. 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 Studies

    Author : Anton Holmsten; [2015]
    Keywords : environmental factors; VAKI; fish ladder; waterflow; water temperature; seasonal migration pattern;

    Abstract : 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