Sökning: "clupea harengus"

Visar resultat 1 - 5 av 17 uppsatser innehållade orden clupea harengus.

  1. 1. The Potential to Target Smaller Sized Baltic Herring to Decrease the Dietary Exposure - an Assessment Based on Dioxin Samples from the Southern Baltic

    Master-uppsats, Lunds universitet/Avdelningen för Teknisk vattenresurslära

    Författare :Sofie Gustafsson; [2024]
    Nyckelord :Dioxin; PCDD Fs; dl-PCBs; Herring; Baltic; Fishery; Technology and Engineering;

    Sammanfattning : PCDD/Fs and dl-PCBs, or more commonly referred to as dioxin and dioxin like substances are compounds present in our surrounding environment. As some congeners of these have been shown to be toxic, they are regulated under the Stockholm Convention. LÄS MER

  3. 2. Evolutionary conservation analysis of sequence variants underlying ecological adaptation in Atlantic herring

    Master-uppsats, Uppsala universitet/Institutionen för biologisk grundutbildning

    Författare :Leyi Su; [2023]
    Nyckelord :Ecological adaptation; Evolutionary conservation; Atlantic herring;

    Sammanfattning : The Atlantic herring (Clupea harengus) is a model organism for exploring the genetic basis of ecological adaptation on account of its large effective population size which greatly restrains the disturbance of genetic drift. In this project, I conducted an evolutionary conservation analysis of the Atlantic herring genome using conservation scores generated by phastCon, phyloP and GERP++ in order to study the sequence variants related to salinity or spawning-time adaptation in Atlantic herring. LÄS MER

  4. 3. Assessment of fish welfare in trawl caught atlantic herring

    Master-uppsats, SLU/Dept. Of Aquatic Resources

    Författare :Mafalda de Leitão Tomás; [2022]
    Nyckelord :welfare; pelagic fisheries; clupea harengus; stress;

    Sammanfattning : With the gain of scientific evidence concerning nociception in fish, the awareness about fish's welfare has been increasing not only for authorities but also for consumers. However, there is still a long way to go concerning how fish are being caught and slaughtered. LÄS MER

  5. 4. Development of northern pike (Esox lucius) populations in the Baltic Sea, and potential effects of grey seal (Halichoerus grypus) predation

    Master-uppsats, SLU/Dept. Of Aquatic Resources

    Författare :Rebecka Svensson; [2021]
    Nyckelord :diet analysis; ; marine mammals; predator-prey; socio-economic; sport fishing; recreational fisheries;

    Sammanfattning : Worldwide, marine mammal populations are increasing after considerable efforts to turn the downward trends caused by hunting, accidental mortality and pollution. The ecosystem effects from the increases of these top predators may be pronounced, but are in most cases poorly known. LÄS MER

  7. 5. Teknisk pelletkvalité och foderförlust av fiskfoder gjort på biprodukter från fisk

    Kandidat-uppsats, SLU/Dept. of Animal Nutrition and Management

    Författare :Jenny Dahlberg; [2020]
    Nyckelord :teknisk pelletkvalité; pellethårdhet; pellethållbarhet; pelletdensitet; biprodukter; fiskensilage; foderförlust;

    Sammanfattning : Sverige får årligen omkring 20 000–60 000 ton biprodukter från den industriella bearbetningen av fisk och skaldjur. Syftet med denna studie är att analysera om biprodukternas tillsatts i fiskfoder har en påverkan på den tekniska pelletkvaliteten samt att dra slutsatser av fiskfodrets foderförlust kopplat till pellethållbarhet. LÄS MER