Royal Netherlands Institute for Sea Research
Royal Netherlands
Institute for Sea Research
Phone number
+31 (0)222 36 9588
PhD student
Wageningen University & Research
Wolf Mooij
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Jeroen Hoekendijk

PhD student

Research interests







Please find my list of NIOZ-publications at the bottom of this webpage or on ResearcherID


Professional education



Awards and Prizes





Linked news

Tuesday 13 September 2022
Using eyes in the sky to locate seals in a rapidly changing Arctic
The polar regions are some of the most inaccessible places of our planet. Figuring out where different seal species reside in this fast-changing environment is challenging. Researchers from the Royal Netherlands Institute for Sea research (NIOZ),…
Monday 04 April 2022
Arctic seals photographed from space
Around this time of year, the Arctic would normally be slowly awaking from its deep winter slumber. This year however, the annual ice melt started sooner than usual. Record breaking heat waves in both Polar regions – reaching up to 40C above normal…
Wednesday 01 December 2021
AI helps speed up ecological surveys
Scientists at NIOZ (Royal Netherlands Institute for Sea Research), EPFL (Swiss Federal Institute of Technology Lausanne) and Wageningen University & Research have developed a new deep-learning model for counting the number of seals in aerial photos…
Wednesday 24 July 2019
Schotse tuimelaars tussen Texel en Den Helder
Een unieke waarneming afgelopen vrijdag voor de Noord-Hollandse kust. NIOZ-onderzoeker Jeroen Hoekendijk en collega-onderzoekers van Wageningen Marine Research zagen vrijdagochtend twee groepen van 10 tuimelaars gestaag het Marsdiep, het zeegat…

NIOZ publications

  • 2021
    Hoekendijk, J.P.A.; Kellenberger, B.; Aarts, G.M; Brasseur, S.; Poiesz, S.; Tuia, D. (2021). Counting using deep learning regression gives value to ecological surveys. NPG Scientific Reports 11: 23209.
    Hoekendijk, J.P.A.; Leopold, M.F.; Cheney, B.J. (2021). Bottlenose dolphins in The Netherlands come from two sides: across the North Sea and through the English Channel. J. Mar. Biol. Ass. U.K. 101(5): 853-859.
    Lameris, T.K.; Hoekendijk, J.; Aarts, G.; Aarts, A.; Allen, A.M.; Bienfait, L.; Bijleveld, A.I.; Bongers, M.F.; Brasseur, S.; Chan, Y.-C.; de Ferrante, F.; de Gelder, J.; Derksen, H.; Dijkgraaf, L.; Dijkhuis, L.R.; Dijkstra, S.; Elbertsen, G.; Ernsten, R.; Foxen, T.; Gaarenstroom, J.; Gelhausen, A.; van Gils, J.A.; Grosscurt, S.; Grundlehner, A.; Hertlein, M.L.; van Heumen, A.J.P.; Heurman, M.; Huffeldt, N.P.; Hutter, W.H.; Kamstra, Y.J.J.; Keij, F.; van Kempen, S.; Keurntjes, G.; Knap, H.; Loonstra, A.H.J.; Nolet, B.A.; Nuijten, R.J.M.; Mattijssen, D.; Oosterhoff, H.; Paarlberg, N.; Parekh, M.; Pattyn, J.; Polak, C.; Quist, Y.; Ras, S.; Reneerkens, J.; Ruth, S.; van der Schaar, E.; Schroen, G.; Spikman, F.; van Velzen, J.; Voorn, E.; Vos, J.; Wang, D.; Westdijk, W.; Wind, M.; Zhemchuzhnikov, M.K.; van Langevelde, F. (2021). Migratory vertebrates shift migration timing and distributions in a warming Arctic. Animal Migration 8(1): 110-131.