This thesis research aimed to answer the question whether Passive Acoustic Monitoring (PAM) data of humpback whales can improve management of the Yarari Marine Mammal Sanctuary in the Dutch Caribbean. This study looks at data recorded on the Saba Bank from December 2016 until April 2017. The PAM data …

Sharks are ecological important inhabitants of most of the world’s oceans and seas. Still their life-history, which is dictated by slow growth rates and late maturity, makes most species, especially demersal- and coastal sharks, prone to exploitation through target- and nontarget fisheries. Another threat …

Nederland heeft in zijn lange geschiedenis met het water vele vormen ontwikkeld om zich te wapenen tegen het water. In dit onderzoek is gekeken naar een nieuwe vorm van bemalen waarmee Nederland een nieuwe stap kan zetten in de strijd tegen het water, het Stirling gemaal. De vraag waar in dit onderzoek …

De Nederlandse jongvolwassenen (18 tot 25 jaar oud) zijn niet specifiek een doelgroep van de Nederlandse NGO's op zee. Jongvolwassenen zijn een moeilijke doelgroep om mee te communiceren. Het is onduidelijk welke boodschappen en welke communicatiemiddelen door Nederlandse NGO's op zee gebruikt moeten …

The species blonde ray (Raja brachyura) and thornback ray (Raja clavata) have been selected for the 2.1 InnoRays project, to get more insight about the status of these stocks in the Greater North Sea. Unstained and stained age determination methods were tested and LFQ data analysis are conducted for …

Coral reefs are one of the most important ecosystems in the world, in terms of both biological diversity and economy. These ecosystems are under a great amount of threats (e.g. climate change, pollution, coastal development and overfishing), which can lead to reef degradation and decrease of three-dimensional …

Coastal lagoon ecosystems are transitional waters, that provide important ecological features and deliver valuable services to mankind. However, due to their geographical positioning at the coast line and physical restrictions, coastal lagoon ecosystems are highly vulnerable towards environmental and …

Salt marsh stability from 10 different salt marshes was studied in the Dutch Wadden Sea region and the Scheldt Estuary during October and November 2018. This report elaborates how salt marsh stability is influenced by bioturbation of Orchestia sp., grazing of large herbivores and different soil and plant …

It has been widely recognized that the rapidly increasing amounts of marine plastic debris are causing problems. However, current studies are mainly focused on the presence and effects of macroplastic and often do not consider microplastic. WMR has conducted research on microplastic uptake by North Sea …

Als vissen niet meer terecht kunnen in koraalriffen, wat is dan het beste kunstmatige onderkomen dat wij mensen ze kunnen bieden? Alwin Hylkema, onderzoeker aan Hogeschool van Hall Larenstein in Leeuwarden, onderzoekt of, en zo ja welke, kunstmatige riffen een tijdelijke schuilplaats kunnen bieden voor …