Coral reefs have been in decline over the past decades. This has greatly increased the need for restorative measures. The islands of Saba and St. Eustatius, two special Dutch municipalities in the Dutch Caribbean, are not exempt to this decline. The Saba Conservation Foundation and St. Eustatius National …

De bijvangst van ondermaatse grijze garnalen (Crangon crangon) vormt een probleem voor de garnalenvisserij in de kustzones van Nederland, Duitsland en Denemarken, die voornamelijk vist in beschermde gebieden. De grote visserijdruk op ondermaatse garnaal heeft geleid tot verschillende problemen, waaronder …

Voor het verduurzamen van ontwerpen in de waterbouw komt steeds meer aandacht. Breuksteenconstructies lenen zich hier uitstekend voor. Op ecologisch gebied is informatie beschikbaar over het ecologisch verrijken van breuksteenconstructies door het toevoegen van verschillende materialen. Over de stabiliteit …

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 …

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 …

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 …

Electric pulse fishing is a very promising and innovative solution instead of using tickler chains such as beam trawling, to enable the catch flat fish. Bottom-trawling activities on the marine ecosystem cause the scrape of the surface or dig into the seabed. The penetration of the gears produce the …

Dit is de samenvatting van een onderzoek dat is uitgevoerd voor de afdeling Finance & Control van Heerema Marine Contractors (HMC) ter optimalisatie van de diensten in het kader van het Turnaround project. Het onderzoek eindigt met enkele aanbevelingen voor de afdeling. Heerema Marine Contractors is …

Global climate change (CC) affects marine mammals, such as cetaceans, by exposing them to an altered marine environment. Cetaceans are indirectly influenced by CC (e.g. through their prey, warmer environment). They are indicator species, significant to marine ecosystems and one of the most endangered …