Off the coast of Borkum, researchers have identified a nursery of school sharks. This reveals that the largest shark species in German waters uses the Wadden Sea as a breeding ground. While WWF is calling for stricter protection measures, fishing associations strongly oppose them.
Research project reveals migration corridor
The Thünen Institute, together with WWF and other partners, has studied the migration patterns of school sharks. A corridor stretches from Helgoland across the southern North Sea and the English Channel to the Celtic Sea. Adult animals are particularly common around Helgoland, while a nursery for juveniles has been discovered between Borkum and the West Frisian Islands.
WWF warns of bycatch
“The school shark is an endangered species that occurs on our doorstep but has so far received no protection,” explains Heike Zidowitz, shark expert at WWF.
WWF sees fisheries as the greatest threat. Although school sharks are not targeted by fishing, they too often end up as bycatch in nets, according to WWF. The organization therefore calls for cross-border protection plans. The Netherlands has already proposed an action plan to protect the animals.
Fishermen reject criticism
The Weser-Ems State Fisheries Association strongly rejects the allegations. In the area in question, only crab fishing takes place, according to deputy chairman Gerold Conradi. This uses selective nets that cannot catch sharks at all. “WWF should actually know how fishing is done here,” emphasizes Conradi.
Facts about the school shark
- Size: up to almost 2 meters
- Weight: up to 45 kilograms
- Lifespan: probably up to 60 years
- Offspring: 6 to 50 pups per litter
- Diet: fish such as herring and sardines, as well as squid and crabs
Conclusion
The discovery of a school shark nursery off Borkum highlights the importance of the North Sea for this endangered species. While environmentalists call for more protection, fishermen point to the selectivity of their fishing methods. One thing is clear: the school shark is at the center of an important debate on species conservation and sustainable use of the seas.
