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Visar resultat 11 - 15 av 29 uppsatser som matchar ovanstående sökkriterier.

  1. 11. Trapping efficiency and retention ability of four pontoon trap entrance types for use in coastal cod fishing, a fishing gear development field trial in the Baltic sea

    Kandidat-uppsats, SLU/Dept. Of Aquatic Resources

    Författare :Nils Nyquist; [2019]
    Nyckelord :cod; pontoon trap; entrance type; coastal fisheries; video analysis; BORIS;

    Sammanfattning : As the Baltic Sea cod gets smaller both in number and size, and the grey seal population continues to increase, the need for alternative fishing methods in coastal fisheries increases. In this project one commercially used and three experimental pontoon trap entrances are tested with the objective to investigate if there are differences in trapping efficiency and retention ability when fishing for cod. LÄS MER

  3. 12. Factors Affecting Harbour Porpoise Bycatch Occurrence In the Swedish Skagerrak and Kattegat Seas

    Master-uppsats, Uppsala universitet/Institutionen för biologisk grundutbildning

    Författare :Jingyao Niu; [2019]
    Nyckelord :Harbour porpoise; bycatch; incidental catch; fishery; marine mammal;

    Sammanfattning : Incidental catch (bycatch) in fisheries is one of the major threats to marine mammal populations worldwide. The harbour porpoise (Phocoena phocoena, Linneaus 1758) is one of the most common cetaceans in northern Europe. LÄS MER

  4. 13. De största hoten mot havssköldpaddornas överlevnad och möjliga lösningar

    Kandidat-uppsats, SLU/Dept. of Biomedical Sciences and Veterinary Public Health

    Författare :Nikitta Afonso; [2018]
    Nyckelord :havssköldpadda; hot; bifångst; plastavfall; klimatförändringar;

    Sammanfattning : I dagens läge möter havssköldpaddan många hot på sin väg genom livet. Som för många arter börjar prövningen direkt efter födseln. För de marina sköldpaddorna är dock många av dessa prövningar orsakade av människan. LÄS MER

  5. 14. Sampling methods of the wels catfish (Silurus glanis) in freshwater lakes : management of a vulnerable species

    Master-uppsats, SLU/Dept. Of Aquatic Resources

    Författare :David Östby; [2018]
    Nyckelord :sampling; gear; monitoring; Wels catfish; Silurus glanis; management; vulnerable spieces; electrofishing; acoustic camera; fyke nets; lake;

    Sammanfattning : Sweden hosts the northernmost natural population of wels catfish (Silurus glanis) in the world. The populations of the species decreased severely in the 20th century, mainly due to different sources of anthropogenic impact. LÄS MER

  7. 15. Discarding the Landing Obligation? : Swedish Fishers' Commitment to the EU Discard Ban

    Master-uppsats, Stockholms universitet/Stockholm Resilience Centre

    Författare :Vera Telemo; [2018]
    Nyckelord :Fishers; Landing Obligation; Legitimacy;

    Sammanfattning : The widespread practice of discarding dead fish is believed to negatively affect the sustainability of fish stocks. Between 2015-2019 a landing obligation, aiming to gradually eliminate this practice, is introduced in all EU fisheries. LÄS MER