Rays and sharks in the North Sea: distribution, protection and management
About this expertise
In short- Distribution & ecology
- Monitoring & fishery data
- Protection & management
- Collaboration with fishermen
- Research methods
Rays and sharks play an important role in the food chain of the North Sea. Many species are vulnerable due to overfishing and slow reproduction. WUR studies their distribution, ecological role and population development. Knowledge about migration, and spawning and rearing areas helps protect these species, enabling their recovery.
We collect data on rays and sharks, through the International Bottom Trawl Survey (IBTS) programme, for example. Based on years of monitoring and analysis of catch data, we identify trends and improve population size estimates. We tag animals to track them and use data models to calculate trends.
Working with fishermen and the fishing industry, we collect data and exchange knowledge. Fishermen report by-catch, collect biological samples and test selective fishing methods. This collaboration provides not only knowledge but also support for sustainable management. We use our results in scientific advice to ICES (International Council for the Exploration of the Sea) and national managers.
Some species, such as the skate and thornback ray, are protected through recovery programmes. WUR studies the effectiveness of these measures, the role of closed areas and the impact of the fishing industry on ray and shark populations. We also study how spatial plans, such as wind farms or sand mining, affect their habitat.
More information
Our approach combines:
- Catch registration and tagging to track distribution and migration
- Data models to calculate trends and survival
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dr.ir. HV (Erwin) Winter
Researcher Sharks & Rays