Essays about: "Baltic grey seal"

Showing result 1 - 5 of 10 essays containing the words Baltic grey seal.

1. 1. Röekillorna unsealed – an osteological analysis of the seal remains at Röekillorna Spring

   University essay from Lunds universitet/Historisk osteologi

   Author : Tea Jahrehorn Önnerfors; [2023]
   Keywords : zooarchaeology; osteological research; offerings-and burial; pinnipedia; grey seals; Neolithic; Iron Age; wetlands; pre-historical Scania; Baltic Sea; Röekillorna Spring; History and Archaeology;

   Abstract : Zooarchaeological studies have played a crucial role in understanding the pre-historic societies of Scania. The analysis of animal remains from archaeological sites has provided insights into the subsistence strategies, economic practices, and cultural beliefs of the people who lived in the region. READ MORE

3. 2. Temporal trends of Polybrominated diphenyl ethers (PBDE) and Hexabromocyclododecane (HBCDD) in Swedish Otter (Lutra lutra) and Grey Seals (Halichoerus grypus)

   University essay from Lunds universitet/Centrum för miljö- och klimatvetenskap (CEC)

   Author : Kajsa Frost; [2023]
   Keywords : Polybrominated diphenyl ether; PBDE; BDE; hexabromocyclododecane; HBCDD; Temporal trends; Flame retardants; Baltic grey seal; Halichoerus grypus; Eurasian otter; Lutra lutra; Intestinal ulcers; BDE-47; BDE-99; BDE-100; BDE-153; BDE-154; Earth and Environmental Sciences;

   Abstract : Polybrominated diphenyl ethers (PBDE) and hexabromocyclododecane (HBCDD) are brominated flame retardants. These compounds are lipophilic, persistent and have been shown to bioaccumulate. READ MORE

4. 3. 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

5. 4. Trapping efficiency and retention ability of four pontoon trap entrance types for use in coastal cod fishing, a fishing gear development field trial in the Baltic sea

   University essay from SLU/Dept. Of Aquatic Resources

   Author : Nils Nyquist; [2019]
   Keywords : cod; pontoon trap; entrance type; coastal fisheries; video analysis; BORIS;

   Abstract : As the Baltic Sea cod gets smaller both in number and size, and the grey seal population continues to increase, the need for alternative fishing methods in coastal fisheries increases. In this project one commercially used and three experimental pontoon trap entrances are tested with the objective to investigate if there are differences in trapping efficiency and retention ability when fishing for cod. READ MORE

6. 5. Impact of Great cormorant (Phalacrocorax carbo sinensis) on post-smolt survival of hatchery reared salmon (Salmo salar) and sea trout (Salmo trutta)

   University essay from SLU/Dept. of Wildlife, Fish and Environmental Studies

   Author : Carolina Gavell; [2018]
   Keywords : great cormorant; salmon; sea trout; sea trout; grey seal; post-smolt survival;

   Abstract : To compensate for the losses due to altered stream habitat large amounts of hatchery-reared Atlantic salmon (Salmo salar) and sea trout (Salmo trutta) are released into the Baltic Sea each year. During the last decades there have been an overall declining trend in the post-smolt survival of both hatchery reared and wild salmon in the Baltic Sea. READ MORE