Sökning: "Baltic ringed seal"

Visar resultat 1 - 5 av 6 uppsatser innehållade orden Baltic ringed seal.

  1. 1. Microplastics In Ringed Seals From The Baltic Sea - Method development regarding the detection of microplastics in the digestive tract contents of marine mammals

    Kandidat-uppsats, Lunds universitet/Examensarbeten i biologi

    Författare :Nicola Parfitt; [2021]
    Nyckelord :Biology and Life Sciences;

    Sammanfattning : Plastic pollution is a severe global problem and every year approximately 368 million tons of plastic is produced. Both terrestrial and marine environments are impacted and hundreds of species affected. LÄS MER

  3. 2. Säl och valjakt ur ett långtidsperspektiv

    Master-uppsats, Uppsala universitet/Institutionen för arkeologi och antik historia

    Författare :Hanna Sjöberg; [2020]
    Nyckelord :Sälar; valar; jakt; Gotland; Östersjön;

    Sammanfattning : Hunting for marine mammals, mainly the seal species found in the Baltic Sea has long been on Gotland. Much research has been done on how and when seals have been hunted, mainly in the cave Stora Förvar on Stora Karlsö off the west coast of Gotland and on Ajvide. LÄS MER

  4. 3. Reproductive status of the female Baltic ringed seal

    Uppsats för yrkesexamina på avancerad nivå, SLU/Dept. of Clinical Sciences

    Författare :Alexandra Odevall; [2019]
    Nyckelord :Baltic ringed seal; occlusion; PCB; DDT; reproduction;

    Sammanfattning : The population of ringed seals in the Baltic Sea was estimated to around 190 000–220 000 individuals in the 1900’s and decreased to approximate 5 000 in the late 1970s. The number of pregnant females also decreased during this time. LÄS MER

  5. 4. Analysing the seal-fishery conflict in the Baltic Sea and exploring new ways of looking at marine mammal movement data

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

    Författare :Ornella Jogi; [2017]
    Nyckelord :Halichoerus grypus; Phoca hispida botnica; seal-fishery conflict; human-wildlife conflict; integrated step selection analysis;

    Sammanfattning : A comprehensive analysis of the available data reveals that there is currently not enough information for making informed management decisions regarding the seal-fishery conflict in the Baltic Sea. Knowledge of hidden and visual damages is limited, which means that the actual cost to the fishing industry from damages is not known. LÄS MER

  7. 5. Method Development for Quantification of Different Persistent Organic Pollutants in Ringed Seal (Phoca hispida) from the Baltic Sea

    Kandidat-uppsats, Örebro universitet/Institutionen för naturvetenskap och teknik

    Författare :Amelie Nordström; [2016]
    Nyckelord :Ringed seal; Baltic Sea; Persistent Organic Pollutants; Sample pre-treatment;

    Sammanfattning : Persistent organic pollutants such as polychlorinated biphenyls (PCBs), DDT and polybrominated diphenyl ethers (PBDEs) tend to accumulate in biota and are transferred through the aquatic food web, which result in a high accumulation in marine mammals. In recent years various novel flame retardants (nBFRs), which have replaced the banned PBDEs, have also started to occur in the environment. LÄS MER