Reports on marine mammals

2024

Environmental effects of UXOclearances (pdf, 2.5 MB)

Protocol harbour porpoise observations offshore wind farms (pdf, 246 kB)

Visual observations of harbour porpoises in OWF (pdf, 1.4 MB)

2022

Analysis of the effects on harbour porpoises from the underwater sound during the construction of the Borssele and Gemini offshore wind farms (pdf, 8.2 MB)

Effects of pile driving in the Borssele wind farm on seals in the Dutch Delta II (pdf, 5.7 MB)

2021

Underwater sound measurements during the installation of the Borssele OWF (pdf, 13 MB)

Behavioral Responses of a Harbor Porpoise (Phocoena phocoena) Depend on the Frequency Content of Playbacks of Pile-driving Sound) (pdf, 1.3 MB)

Predicting harbour porpoise strandings based on near shore sightings indicate elevated temporal mortality rates (also this scientific publication)

2019

Temporary Hearing Threshold Shift After Exposure to a 6.5 kHz Continuous Wave in a Second Harbor Porpoise (Phocoena phocoena) (pdf, 937 kB)

Quantifying harbour porpoise foraging behaviour in CPOD data - identification, automatic detection and potential application (pdf, 12 MB)

Feasibility of a Passive Acoustic Monitoring (PAM) network for Harbour Porpoises on the Dutch Continental Shelf (pdf, 2.4 MB)

Update Aquarius models pile driving sound predeictions TNO 2019 (pdf, 3.2 MB)

Analysis of stranding data of harbour porpoises along the North Sea (pdf, 2.9 MB) (also this scientific publication)

2018

Underwater noise frequency sensitivity TNO 2018 (pdf, 1.1 MB)

Hearing thresholds for underwater sounds of harbor seals swimming at the water surface (pdf, 3.2 MB)

Seasonal changes in food consumption, respiration rate and body condition of a male harbour porpoise (pdf, 3.3 MB)

Kastelein, R., Helder-Hoek, L., Jennings, N., Kester, R., Huisman, R. (2018), Reduction in body mass and blubber thickness of harbor porpoises (Phocoena phocoena) due to fasting for 24 hours in four seasons (Nr. 2018-01), SEAMARCO (Sea Mammal Research Company), 19 pp. (pdf, 544 kB)

2017

IJsseldijk, L.L. and Gröne, A., Investigation into hearing damage and life history of Dutch stranded harbour porpoises (2017), Faculty of Veterinary Medicine, Department of Pathobiology, Utrecht University, 25 pp.

Van den Heuvel-Greve, M.J., IJsseldijk, L, Kwadijk, C., Kotterman, M. (2017), Contaminants in harbour porpoises beached along the Dutch coast. A first overview of contaminants in all age classes (C069/17). Wageningen Marine Research. 63 pp.

2016

Aarts, G., Cremer, J., Kirkwood, R., Van der Wal, R.J., Matthiopoulos, J. & Brasseur, S. (2016) Spatial distribution and habitat preference of harbour seals (Phoca vitulina) in the Dutch North Sea (Nr. C118/16), Wageningen Marine Research, 43 pp.