Essays about: "Ringed seal"

Showing result 1 - 5 of 9 essays containing the words 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

   University essay from Lunds universitet/Examensarbeten i biologi

   Author : Nicola Parfitt; [2021]
   Keywords : Biology and Life Sciences;

   Abstract : 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. READ MORE

3. 2. Seal Predation Costs on the Vendace Fishery in the Bothnian Bay : A partial bioeconomic analysis of the economic costs inflicted upon the vendace fishery by seal predation

   University essay from Umeå universitet/Nationalekonomi

   Author : Simon Lindgren; [2019]
   Keywords : ;

   Abstract : This study examines the costs in terms of lost revenues inflicted upon the vendace fishing industry by increased seal predation in the Bothnian Bay between the years of 2008 and 2017. A partial bioeconomic model is used to estimate the costs of predation, where a constant stock management type is assumed. READ MORE

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

   University essay from SLU/Dept. of Clinical Sciences

   Author : Alexandra Odevall; [2019]
   Keywords : Baltic ringed seal; occlusion; PCB; DDT; reproduction;

   Abstract : 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. READ MORE

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

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

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

   Abstract : 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. READ MORE

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

   University essay from Örebro universitet/Institutionen för naturvetenskap och teknik

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

   Abstract : 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. READ MORE