Essays about: "hatchery"

Showing result 1 - 5 of 20 essays containing the word hatchery.

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

    University essay from Uppsala universitet/Institutionen för ekologi och genetik; Uppsala universitet/Institutionen för biologisk grundutbildning

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

    Abstract : 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. READ MORE

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

    University essay from Linköpings universitet/Institutionen för fysik, kemi och biologi

    Author : Gabrielle Lundén; [2022]
    Keywords : Animal behavior; Animal welfare; Gallus domesticus; Hatchery stress; Play behavior;

    Abstract : 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. READ MORE

  4. 3. Kan Campylobacter överföras via hönsägg?

    University essay from SLU/Dept. of Biomedical Sciences and Veterinary Public Health

    Author : Jeremy Rocchio; [2021]
    Keywords : Campylobacter jejuni; ägg; höns; kyckling; överlevnad; överföring;

    Abstract : 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. READ MORE

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

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

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

    Abstract : 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. READ MORE

  6. 5. Cognitive bias and welfare of egg-laying chicks: Impacts of commercial hatchery procedures on cognition.

    University essay from Linköpings universitet/Biologi

    Author : Tiphaine Palazon; [2020]
    Keywords : Cognition; Cognitive bias; Depression; Early life stress; Emotion; Memory; Optimistic; Pessimistic; Prenatal stress; Welfare; White leghorn.;

    Abstract : Egg-laying hens coming from commercial hatchery go through hatchery procedures considered as stressful and engaging prolonged stress response in adult chickens. The aim of our study was to evaluate the impact of commercial hatching procedure on the affective state of chicks, on their short- and long-term memory and on their need for social reinstatement. READ MORE