Sökning: "Cetaceans"

Visar resultat 1 - 5 av 9 uppsatser innehållade ordet Cetaceans.

  1. 1. Navigating the Waves of Conservation: Spatiotemporal Patterns in Harbour Porpoise Strandings in Swedish Waters

    Kandidat-uppsats, Uppsala universitet/Institutionen för biologisk grundutbildning

    Författare :Vigge Ulfsson; [2024]
    Nyckelord :Strandings; spatiotemporal patterns; harbour porpoise;

    Sammanfattning : Harbour porpoises (Phocoena phocoena) are the only cetacean residents found year-round in Swedish waters. Since in situ monitoring of cetaceans can be difficult, invasive and often costly, strandings can be used as a cost-effective alternative to continuously collect data on these elusive animals. LÄS MER

  3. 2. Investigating the influence of the tidal regime on harbour porpoise Phocoena phocoena distribution in Mount’s Bay, Cornwall

    Master-uppsats, Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

    Författare :Duncan Jones; [2023]
    Nyckelord :Geography; Geographical Information Systems; GIS; Habitat Modelling; Harbour Porpoise; MaxEnt; Tidal Processes; Conservation; Earth and Environmental Sciences;

    Sammanfattning : Investigating the influence of the tidal regime on harbour porpoise Phocoena phocoena distribution in Mount’s Bay, Cornwall Abstract Unintentional by-catch in fishing gear is a significant cause of mortality of harbour porpoises in UK waters. Understanding the spatial distribution of harbour porpoises at fine scales and how this changes over time is essential when trying to understand where these lethal interactions might occur. LÄS MER

  4. 3. Do potentially seal-safe pingers deter harbour porpoises (Phocoena phocoena) in the vicinity of gillnets and thereby reduce bycatch?

    Master-uppsats, Linköpings universitet/Biologi

    Författare :Simon Björklund Aksoy; [2020]
    Nyckelord :Acoustic Deterrent Device; Banana pinger; Bycatch; Commercial fishery; C-POD; Dinner-bells; Future Oceans pinger; Harbour porpoise;

    Sammanfattning : Incidental bycatch in gillnets is a substantial threat to small cetaceans. Using Acoustic Deterrent Devices, “pingers”, have successfully reduced bycatch of harbour porpoises in gillnets. LÄS MER

  5. 4. Hur plast påverkar valar

    Kandidat-uppsats, SLU/Dept. of Animal Environment and Health

    Författare :Rebecka Clern; [2019]
    Nyckelord :makroplast; fiskeutrustning; fiskenät; spöknät; intrassling; förtäring;

    Sammanfattning : Plastproduktionen har ökat avsevärt sedan 1950-talet, och dessvärre hamnar allt för stor del av plasten i naturen. På grund av plasters egenskaper kan det ta flera sekel innan de bryts ned, och idag befarar forskarna att det kan komma att finnas mer plast i haven än vad det kommer finnas fisk – redan år 2050. LÄS MER

  7. 5. 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