Essays about: "harbour seal"

Showing result 1 - 5 of 7 essays containing the words harbour seal.

  1. 1. Evaluation of photo-ID technique to estimate harbour seal numbers in Gullmarsfjorden, Sweden

    University essay from Göteborgs universitet / Instiutionen för biologi och miljövetenskap

    Author : Simon Isaksson; [2022-10-26]
    Keywords : ;

    Abstract : To be able to preserve areas in nature in a careful way a good understanding of the biodiversity living there is needed. The harbour seals are a top predator that affect and is affected by the whole food chain and plays a vital role in the ecosystem. READ MORE

  3. 2. Influenza A in Swedish harbour seals (Phoca vitulina) : a serological study

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

    Author : Johanna Johnsson; [2022]
    Keywords : IAV; influenza A; harbour seals; H10N7; marine mammals; Phoca vitulina; serology; Sweden; virus;

    Abstract : Evidence of infection with influenza A has been documented in several different marine mammals. However, large outbreaks with mass mortalities have only been seen in harbour seals. In 2014, the first outbreak with influenza A virus (IAV) in harbour seals in Europe was reported. READ MORE

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

    University essay from Linköpings universitet/Biologi

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

    Abstract : 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. READ MORE

  5. 4. Användning av åtelkameror för att uppskatta antalet sälar i fjordarna innanför Orust : en metodutvärdering

    University essay from SLU/Dept. Of Aquatic Resources

    Author : Daniel Carlsson; [2019]
    Keywords : knubbsäl; Phoca Vitulina; 8-fjordar; EBFM; åtelkamera; time-lapse;

    Abstract : I slutet av 1980-talet blev många fiskbestånd på svenska västkusten överfiskade vilket bl.a. resulterade i en minskning av kustnära bestånd av olika torskfiskarter. READ MORE

  6. 5. Can tourism Seal the deal? : an explorative study on Seal tourism in Sweden

    University essay from SLU/Dept. of Economics

    Author : Ebba Alteg; [2019]
    Keywords : benefits; seals; survey; wildlife tourism; wildlife management;

    Abstract : The increased seal populations in the Swedish coastal areas have resulted in increased damages for fishing companies with associated costs. The negative aspect of seals has been quantified (costs for small-scale fishers) but both negative and positive aspects of natural resources must be considered for politicians to make efficient policy decisions. READ MORE