Research institute Wageningen Marine Research Research into strategic and applied marine ecology. About us Harm from marine litter? The concept of 'harm' is hard to define when it comes to detrimental effects of plastic waste in the marine environment. Wageningen Marine Research... Read more Strong link between polar cod and sea ice of the Arctic Ocean Polar cod fulfil a key role in the Arctic food web, as they are a major source of food for seals, whales and seabirds alike. Under the ice of the... Read more Martin Baptist in final of Prins Friso Engineers Award Martin Baptist of Wageningen Marine Research has been selected as one of the final three contestants for the prestigious Prins Friso Engineers Award,... Read more Potassium hydroxide: suitable for isolating plastic particles from marine organisms? Does potassium hydroxide, a substance used to filter organic material from stomachs of marine animals, impact different kinds of plastic in the same... Read more Sky 'Ocean Rescue' campaign on plastic pollution Biologists of Wageningen Marine Research have contributed to the ‘Ocean Rescue’ campaign by Sky News, which made a high profile start on... Read more Go to News & Calendar Dossiers Weblogs Projects Publications Open Data Facilities, Products and Services Work at Wageningen Marine Research About us Expertise areas Contact Areas of expertise Aquaculture & fisheries Delta technology Marine ecology Maritime technology Marine policy Go to: About us Facilities & services Work & internships Best research photos Contact & addresses Vote Martin Baptist for the Prins Friso Engineers Award! Vote now e-Newsletter Coast & Sea Read more Photo of the week: The age of fish can be determined by studying their otoliths. Similar to trees, otoliths have annual growth rings. In addition, based on the size of an otolith, the length and weight of the fish can be predicted.