Funding for this research was provided by:
Johann Wolfgang Goethe-Universität, Frankfurt am Main
Article History
Received: 25 January 2021
Accepted: 6 July 2021
First Online: 17 July 2021
Declarations
:
: The authors declare they do not have competing interests.
: Approval of our present study by a review board institution or ethics committee was not necessary because all fish were caught during a regular research cruise onboard the RV Polarstern. No living animals were used. All fish were expertly killed according to the German Animal Protection Law (§4) and the ordinance of slaughter and killing of animals (Tierschlachtverordnung § 13).
: Not applicable.
: All authors gave final approval for publication and agree to be held accountable for the work performed therein.