Sökning: "hatchery"

Visar resultat 1 - 5 av 29 uppsatser innehållade ordet hatchery.

  1. 1. A recipe for fish and SNPs : Filling the blanks for conservation genomics of Swedish wels catfish (Silurus glanis) populations

    Master-uppsats, Uppsala universitet/Institutionen för ekologi och genetik; Uppsala universitet/Institutionen för biologisk grundutbildning

    Författare :Lars Littmann; [2022]
    Nyckelord :Catfish; Silurus glanis; Genomics; Genetics; Conservation; Mitochondrial; Whole-genome; NGS; Sweden;

    Sammanfattning : Swedish populations of Wels catfish (Silurus glanis) experienced severe declines during the 19th and 20th centuries. The main causes for the decline were loss of suitable spawning habitat and fragmentation of populations. Currently, three native and two reintroduced populations remain in Sweden. LÄS MER

  3. 2. How does hatchery stress affect the development of play behavior?

    Master-uppsats, Linköpings universitet/Institutionen för fysik, kemi och biologi

    Författare :Gabrielle Lundén; [2022]
    Nyckelord :Animal behavior; Animal welfare; Gallus domesticus; Hatchery stress; Play behavior;

    Sammanfattning : Play is a behavior mainly observed in young individuals that can differ greatly between species in both function and appearance. Presence of play indicates positive experiences in animals, making play a useful assessment tool for animal welfare. Commercial hatcheries expose chicks to several stressors that can affect both behavior and welfare. LÄS MER

  4. 3. Kan Campylobacter överföras via hönsägg?

    Uppsats för yrkesexamina på avancerad nivå, SLU/Dept. of Biomedical Sciences and Veterinary Public Health

    Författare :Jeremy Rocchio; [2021]
    Nyckelord :Campylobacter jejuni; ägg; höns; kyckling; överlevnad; överföring;

    Sammanfattning : Campylobacterios är den vanligaste rapporterade orsaken till magtarminfektion hos människor i såväl Sverige som övriga Europa och USA. Campylobacter jejuni subsp. jejuni är den underart som oftast orsakar sjukdom. Sjukdomen orsakar stora ekonomiska kostnader för samhället varje år. LÄS MER

  5. 4. Future management of Laisriver Brown trout : what life history and enhancement strategy should be prioritized?

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

    Författare :Isak Landström; [2021]
    Nyckelord :salmo trutta; acoustic telemetry; spawning migration; hatchery-reared; genetic assignment; sea-run; resident; laisälven;

    Sammanfattning : The life history and coexistence of subpopulations of brown trout in the same drainage area are relatively well known. The three forms of trout; sea-run, lake-run and resident, can all be present in the same location at some period of their life cycle, e.g. during the parr stage or at spawning. LÄS MER

  7. 5. Granbarkborre (Ips typographus) och Skyddad skog : Orsakar skyddad natur granbarkborreangrepp i produktionsskog?

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

    Författare :Gustav Eriksson; [2021]
    Nyckelord :European spruce bark beetle; Ips typographus; protected forests; forest pest;

    Sammanfattning :   The aim of this report was to investigate whether the management of protected forests cause increased risk of infestation by the European spruce bark beetle (Ips typographus) in production forests, and whether the risk of infestation in production forests is greater in the vicinity of protected forests. The survey was conducted by using GIS-data covering suspected attacks and forests that are susceptible to infestations. LÄS MER