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Article History

Received: 16 August 2017

Accepted: 22 March 2018

First Online: 10 April 2018

Ethics approval

: We have adhered to all local, national and international regulations and conventions, and we respected normal scientific ethical practices. The specimen used in this study comes from a wild population and was part of a larger haul of commercially fished individuals intended for human consumption. Following capture the fish was immediately stunned with a blunt object, then killed by bleeding, following standard procedure by local fishermen. Sampling in this manner does not fall under any specific legislation in Norway, but it is in accordance with the guidelines set by the ‘Norwegian consensus platform for replacement, reduction and refinement of animal experiments’ ().

: Not applicable.

: The authors declare that they have no competing interests.

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