Recent surveys conducted by Wageningen University reveal a significant increase in the gray seal population in the Wadden Sea. On July 2, 2026, the report detailed that during the 2025–2026 survey year, a total of 12,497 gray seals and 3,385 pups were recorded, indicating a continued upward trend in the region.
Survey Results Highlight Population Growth
The latest findings show a 3.6% increase in adult gray seals compared to 2025. The highest concentration was observed in the Dutch part of the Wadden Sea, with 8,981 seals counted. Pups saw a remarkable 10% increase from the previous year, with numbers reaching 3,385.
Over the past five years, the average annual growth rate for pups has been 12%. Most pups were recorded in the Dutch Wadden Sea (1,731), followed by Helgoland (1,077) and Lower Saxony (575).
Shifts in Population Dynamics and Breeding Patterns
The Expert Group on Marine Mammals anticipates that the gray seal population will continue to expand eastward. Observations suggest that births in the eastern Wadden Sea are occurring later in the season, potentially indicating the presence of younger mothers. As the colony grows, the timing of the pupping season may also shift earlier.
Jessica Schop, a seal researcher at Wageningen Marine Research, emphasized the importance of understanding these dynamics: "Gray seals travel large distances across the North Sea, meaning that these surveys include both local animals and animals from other regions." This highlights the need for international collaboration in monitoring gray seal populations.
International Cooperation in Monitoring Gray Seals
Annual counts of gray seals in the Wadden Sea are conducted in conjunction with harbor seal populations. The gray seal is recognized as one of the largest predators along the Wadden coast, making its monitoring crucial for ecological balance.
Efforts to track these populations are part of a broader international initiative involving Denmark, Germany, and the Netherlands. This collaboration ensures that the population dynamics of gray seals are accurately assessed and reported.
- 12,497 adult gray seals counted in 2026
- 3,385 pups recorded
- 3.6% increase in adult population from 2025
- Largest population in Dutch Wadden Sea: 8,981
- Strongest pup growth in Lower Saxony: 22.3% increase
🤖 This article was rewritten by Feed and Figures' editorial AI from a report originally published by Phys.org. Facts and quotes are preserved from the original; the rewrite focuses on clarity and structure. For the unedited original, see the source link below.
