Essays about: "marine mammal"

Showing result 1 - 5 of 12 essays containing the words marine mammal.

  1. 1. Making nets more acoustically visible : Floats as passive mitigation measures to reduce bycatch of harbour porpoise (Phocoena phocoena) in gillnets

    University essay from SLU/Dept. Of Aquatic Resources

    Author : Frida Rosshagen; [2023]
    Keywords : toothed whales; harbour porpoise; Phocoena phocoena; incidental capture; bycatch; fisheries; fishing gear; ; gillnet; mitigation; reduction; low-cost; passive acoustic reflector; float;

    Abstract : Incidental capture in fishing gear is today affecting at least 112 marine mammal species worldwide and for many smaller toothed whale species (Odontocete), gillnets are considered to be the largest problem. Although some effective mitigation measures exists, these are often context specific and many might be hard to implement due to reasons such as high costs and maintenance. READ MORE

  3. 2. Sealing the fate of arctic marine mammals : challenges and opportunities of non-legislative international organisations

    University essay from SLU/Dept. of Urban and Rural Development

    Author : Anastasiia Suslina; [2021]
    Keywords : Arctic; marine mammals; Arctic Council; Conservation of Arctic Flora and Fauna; ecosystem-based management; North Atlantic Marine Mammal Commission;

    Abstract : The Arctic is changing rapidly as a result of climate change, putting endemic marine mammal species in greater danger than ever. In such circumstances, the management process in international organizations becomes more urgent. READ MORE

  4. 3. Protecting the proper Baltic harbour porpoise : An evaluation of Sweden’s conservation plan

    University essay from Malmö universitet/Institutionen för Urbana Studier (US)

    Author : Isabelle Faringstam; [2021]
    Keywords : Conservation; Evaluation; Rationality; Efficiency; Harbour porpoise; Sweden; Artbevarande; Utvärdering; Rationalitet; Effektivitet; Tumlare; Sverige;

    Abstract : More than a third of the earths marine mammal species are threatened. This study aims to analyze and evaluate the conservation of the proper Baltic harbour porpoisein Sweden. The population is estimated to consist of only 500 individuals and are likely to be extinct if measures are not taken. READ MORE

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

    University essay from SLU/Dept. Of Aquatic Resources

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

    Abstract : 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. READ MORE

  6. 5. Factors Affecting Harbour Porpoise Bycatch Occurrence In the Swedish Skagerrak and Kattegat Seas

    University essay from Uppsala universitet/Institutionen för biologisk grundutbildning

    Author : Jingyao Niu; [2019]
    Keywords : Harbour porpoise; bycatch; incidental catch; fishery; marine mammal;

    Abstract : 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. READ MORE