Scheidat, Meike http://orcid.org/0000-0001-9702-6490
Vrooman, Jip http://orcid.org/0000-0002-1739-8102
Teilmann, Jonas http://orcid.org/0000-0002-4376-4700
Baltzer, Johannes http://orcid.org/0000-0002-8868-3218
Bie Thøstesen, Charlotte http://orcid.org/0000-0002-7483-5188
Diederichs, Britta
Dietz, Rune http://orcid.org/0000-0001-9652-317X
Geelhoed, Steve C. V. http://orcid.org/0000-0002-2649-5051
Gilles, Anita http://orcid.org/0000-0001-7234-8645
IJsseldijk, Lonneke L. http://orcid.org/0000-0001-7288-9118
Keijl, Guido O.
Nabe-Nielsen, Jacob http://orcid.org/0000-0002-0716-9525
Ruser, Andreas
Schnitzler, Joseph http://orcid.org/0000-0002-0794-9927
Sveegaard, Signe http://orcid.org/0000-0002-8893-9842
Siebert, Ursula http://orcid.org/0000-0002-2556-3948
Article History
Received: 31 December 2021
Revised: 22 January 2024
Accepted: 10 March 2024
First Online: 8 April 2024
Declarations
:
: The authors declare that they have no conflict of interest.
: Handling and instrumentation of porpoises were conducted under permission issued to Jonas Teilmann from the Environmental Protection Agency (Ministry of Environment and Food of Denmark, NST-3446–0016) and the Animal Experiments Inspectorate (Ministry of Environment and Food of Denmark, 2015–15-0201–00549).
: All necessary permits for sampling and observational field studies have been obtained by the authors from the competent authorities. The study is compliant with CBD and Nagoya protocols.
: Different datasets were generated and/or analysed during the current study. In the following, we provide an overview of their availability:The combined dataset of aerial survey data from Danish, German and Dutch waters is not publicly available but requests regarding this data can be directed to Anita Gilles (Anita.Gilles@tiho-hannover.de) or Signe Sveegaard (ssv@ecos.au.dk).The combined dataset of Danish, German and Dutch strandings is available as supplementary material with IJsseldijk et al. (CitationRef removed).The Dutch database on strandings is public and can be accessed at ExternalRef removed until early 2024, after which it will be available on ExternalRef removed. Data requests can be directed to Guido Keijl (guido.keijl@naturalis.nl).The German dataset of passive acoustic monitoring is not publicly available, but Ursula Siebert (Ursula.Siebert@tiho-hannover.de) and Britta Diederichs (Britta.Diederichs@lkn.landsh.de) can be contacted regarding availability.The telemetry data are not publicly available, but requests regarding this data can be directed to Jonas Teilmann (jte@ecos.au.dk).
: All authors contributed to the conception of the work. Data collection was done by JB, CBT, RD, SCVG, AG, LLIJ, GOK, JN-N, AR, MS, JS, US, SS and JT. All authors contributed to data analysis and interpretation; maps were created by JV and SS. All authors contributed on the drafting of the work and/or the critical revision of it. All authors read and approved the final manuscript to be published.