Received: 1 June 2018
Accepted: 4 August 2019
First Online: 12 August 2019
Ethics approval and consent to participate
: This research was conducted with the approval of the Marine and Freshwater Research Institute of Iceland in accordance with a license issued by the Icelandic Food and Veterinary Authority.
: ÁB, AG and AS are employees of Star-Oddi manufacturer of the logging device. All other authors have no competing interests.