Sökning: "gillnet"
Visar resultat 1 - 5 av 12 uppsatser innehållade ordet gillnet.
1. Navigating the Waves of Conservation: Spatiotemporal Patterns in Harbour Porpoise Strandings in Swedish Waters
Kandidat-uppsats, Uppsala universitet/Institutionen för biologisk grundutbildningSammanfattning : 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
2. Gillnet Fishing in Costa Rica's Gulf of Nicoya : An Analysis of Target Catch and Artisanal Fishermen's Perceptions in the Marine Area for Responsible Fishing Paquera - Tambor
Kandidat-uppsats, Linnéuniversitetet/Institutionen för biologi och miljö (BOM)Sammanfattning : The gulf of Nicoya is one of the most productive estuaries in the world and is home to many artisanal fishermen who rely on the gulf as both an economical source but also a way of feeding their families. The Marine Protected Area (MPA) named “Marine area for responsible fishing Paquera – Tambor” is located between Paquera and Tambor on the Nicoya peninsula on the Pacific coast of Costa Rica. LÄS MER
3. Making nets more acoustically visible : Floats as passive mitigation measures to reduce bycatch of harbour porpoise (Phocoena phocoena) in gillnets
Master-uppsats, SLU/Dept. Of Aquatic ResourcesSammanfattning : 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. LÄS MER
4. Evaluation of filter and extraction kits for eDNA-based quantification of Northern pike density
Master-uppsats, SLU/Dept. Of Aquatic ResourcesSammanfattning : Multi-mesh gillnets are the most common gear in Swedish fish monitoring programs. The method works for many fish species but has limitations. LÄS MER
5. Do potentially seal-safe pingers deter harbour porpoises (Phocoena phocoena) in the vicinity of gillnets and thereby reduce bycatch?
Master-uppsats, Linköpings universitet/BiologiSammanfattning : 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
