Sökning: "ursus"

Visar resultat 21 - 25 av 43 uppsatser innehållade ordet ursus.

  1. 21. Effektivisering av urvalsprocesser vid analysering av björnspillning : Ett förslag till den svenska förvaltningen av brunbjörn Ursus arctos

    Kandidat-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Författare :Jonas Gustafsson; [2015]
    Nyckelord :Bear monitoring in Scandinavia; DNA sampling; optimize wildlife managment; logistic regression; weighted average;

    Sammanfattning : The aim with this report is to formulate a strategic method to optimize selection processes of DNA-samples from a faeces inventory to identify as many individuals in as few analyzes as possible, and by that keep down the costs of brown bear management. Brown bear management in Sweden founds today on results from faeces inventory and is substantially led by the county administration boards. LÄS MER

  3. 22. Miljökemikaliers påverkan på isbjörnars (Ursus maritimus) reproduktion och hur dessa kemikalier når djuren

    Kandidat-uppsats, SLU/Dept. of Anatomy, Physiology and Biochemistry

    Författare :Jessica Isaksson; [2015]
    Nyckelord :isbjörn; slädhund; reproduktion; miljökemikalier; spridning; könsmognad; könsorgan; missbildningar; polyklorerade bifenyler; organiska klorföreningar; polar bear; sledge dog; reproduction; environmental chemicals; distribution; sexual maturation; genitals; malformations; polychlorinated biphenyls; organochlorine compounds;

    Sammanfattning : Environmental chemicals are transported to the Arctic through the air and oceans, once within the Arctic they spread through rivers, lakes and other watercourses. Polar bears and sledge dogs in-gest high concentrations of environmental chemicals since many of the chemicals are fat-soluble and their diet mainly consists of marine mammals. LÄS MER

  4. 23. Beyond genotype : Using SNPs for pedigree reconstruction-based population estimates and genetic characterization of two Swedish brown bear (Ursus arctos) populations

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

    Författare :Robert Spitzer; [2015]
    Nyckelord :molecular ecology; SNPs; pedigree reconstruction; rarefaction; population estimates;

    Sammanfattning : Reliable population estimates are an important aspect of sustainable wildlife management but usually difficult to obtain for rare and elusive large carnivores. I tested a new method developed by Creel and Rosenblatt (2013) to estimate the population size of two Swedish brown bear (Ursus arctos) populations. LÄS MER

  5. 24. Short window of opportunity for brown bear (Ursus arctos) predation on reindeer (Rangifer tarandus) calves

    Kandidat-uppsats, SLU/Dept. of Ecology

    Författare :Linnéa Eleonora Kjellberg; [2014]
    Nyckelord :Ursus arctos; Rangifer tarandus; predation; management; reindeer husbandry;

    Sammanfattning : To improve and develop a management system for reindeer husbandry regarding minimizing depredation by brown bears, knowledge about current depredation patterns is required. Using data obtained from a predation study regarding brown bear predation on reindeer from 2010 to 2012 I aimed at investigating what solutions are available to minimize brown bear predation on reindeer calves. LÄS MER

  7. 25. SNP-based conservation genetics of the southern Swedish brown bear (Ursus arctos) population

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

    Författare :Joanna Fahlén; [2014]
    Nyckelord :molecular ecology; population genetics; eDNA; non-invasive;

    Sammanfattning : Species with small population sizes needs to be managed in order to prevent extinction in the long-term. Genetic monitoring of wild populations over time is important since it enables for management strategies that takes the genetic status into consideration. LÄS MER