Sökning: "Arctic charr"

Visar resultat 6 - 10 av 11 uppsatser innehållade orden Arctic charr.

  1. 6. Responses to declining zoobenthos abundance : Changes over time in diet and growth of Arctic charr (Salvelinus alpinus)

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

    Författare :Douglas Skarp; [2020]
    Nyckelord :charr; zoobenthos; growth; diet;

    Sammanfattning : A decline in the density of zoobenthos has taken place in Lake Abiskojaure in the northern Swedish mountains between 1988 and 2019 but no response can be seen in the abundance (CPUE) of Arctic charr (Salvelinus alpinus) that feed mainly on benthic invertebrates. To evaluate if possible shifts in resource use of charr explain this lack of change in population abundance, stomach contents (i. LÄS MER

  3. 7. Genetic diversity status and associations with sperm quality characteristics in farmed Arctic charr (Salvelinus alpinus L.) across Sweden

    Master-uppsats, SLU/Dept. of Animal Breeding and Genetics

    Författare :Anam Anjum; [2020]
    Nyckelord :Arctic charr; dd-RADseq; genetic diversity; GWAS; reproductive success;

    Sammanfattning : The national breeding programme of Arctic charr (Salvelinus alpinus L.) has been of fundamental importance for the expansion of Arctic charr farming across Sweden. Selection has been ongoing since 1980s documenting approximately 10% improvement per generation regarding growth related traits. LÄS MER

  4. 8. Responses to declining zoobenthos abundance : Changes over time in diet and growth of Arctic charr (Salvelinus alpinus)

    Master-uppsats,

    Författare :Douglas Skarp; [2020]
    Nyckelord :charr; zoobenthos; growth; diet;

    Sammanfattning : A decline in the density of zoobenthos has taken place in Lake Abiskojaure in the northern Swedish mountains between 1988 and 2019 but no response can be seen in the abundance (CPUE) of Arctic charr (Salvelinus alpinus) that feed mainly on benthic invertebrates. To evaluate if possible shifts in resource use of charr explain this lack of change in population abundance, stomach contents (i. LÄS MER

  5. 9. Effect of variant ovarian fluid on sperm performance and egg fertilization rates of Arctic charr (Salvelinus alpinus L.)

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

    Författare :Lwabanya Mabo; [2019]
    Nyckelord :arctic charr; ovarian fluid; sperm motility; fertilization rate; vcl;

    Sammanfattning : Successful in vitro fertilization in aquaculture is highly dependent on the method used to handle or treat the eggs and milt. As such it is of paramount importance that timely evaluation of the methods is conducted to enhance hatchery productivity and reduce the cost of production. LÄS MER

  7. 10. Klimatförändringarnas effekt på röding och siklöja

    Master-uppsats, Lunds universitet/Miljövetenskaplig utbildning

    Författare :Frida Moberg; [2015]
    Nyckelord :Climate induced impact pressure; Jönköpings län; siklöja Coregonus albula; röding Salvelinus umbla; klimatförändring; Klimatinducerat påverkanstryck; climate change; great Arctic Charr Salvelinus umbla; vendace Coregonus albula; Jönköping county; Biology and Life Sciences; Earth and Environmental Sciences;

    Sammanfattning : I föreliggande examensarbete har en riskanalysbaserad metod utvecklats som medger bedömning av fiskfaunas respons till ett förändrat framtida klimat såsom modellerat av IPCC, här kallat klimatinducerat påverkanstryck. Metoden har använts på två fiskarter, röding och siklöja, inom deras utbredningsområde i Jönköpings län. LÄS MER