Salt marshes are known to be an important habitat type for numerous species of fish. As fish stocks are pressured around the world, providing them with suitable habitat is very important. Through managed realignments or tidal restoration, intertidal salt marshes are created or restored. Which fish use …

Caribbean coral reefs are in decline and the deployment of artificial reefs, structures on the sea bottom that mimic one or more characteristics of a natural reef, is increasingly often considered to sustain ecosystem services. Independent of their specific purposes, it is essential that artificial reefs …

The invasive lionfish (Pterois volitans and Pterois miles) started invading the Caribbean Sea since the 1980’s and were first sighted on the Saba Bank since 2009 where they established themselves fully during the following two years. They have no specific preference for prey species and their predation …

Rijkswaterstaat has an effort-obligation and result-obligation to take measures to achieve the goals of the Water Framework Directive (WFD) at the Eastern Scheldt and Lake Grevelingen. The WFD aims to achieve and protect a sufficient ecological and chemical status of inland surface waters, transitional …

The coral reef ecosystem provides important services such as tourism revenue, food, pharmaceutical products and coastal defence. Coral reefs are under a severe amount of threats such as pollution, overfishing and climate change. These threats result in a decrease of coral reefs and so a decrease in three- …

Wageningen Marine Research (WMR) conducts a variety of monitoring programs in Dutch waters. These monitoring programs are conducted to gain knowledge of trends, abundance and diversity of fish species in the Dutch rivers and lakes. Many monitoring programs pay special attention to diadromous fish which …

Fish have the natural behaviour to move across various aquatic ecosystems and for some species this is of vital importance. Migration is often a seasonal phenomenon which occurs in order to move between habitats, such as winter refuges-, foraging- and spawning or nursery habitats, also escaping unfavourable …

The international Wadden Sea is an estuarine tidal area along the North Sea coasts of The Netherlands, Germany and Denmark. It is characteristic for regions with sandy coasts and a medium tidal range. Fifty barrier islands separate the Wadden Sea from the North Sea, and an offshore transition zone to …

In dit rapport wordt onderzocht wat de bijdrage van houtstructuren is voor ecologisch herstel van de visstand in de Overijsselse Vecht. Er zijn 2 soorten houtstructuren te onderscheiden: beddingstructuren en oeverstructuren. Beddingstructuren worden in de watergang aangelegd, terwijl oeverstructuren …

Nutrition is an important consideration in zoos, as it affects the physical and mental wellbeing of the animals. To satisfy all aspects of the nutritional needs of animals, diet protocols are carefully designed. Kodiak bears are one of the largest land predators in the world, with males weighing up to …