Funding for this research was provided by:
Deutsche Forschungsgemeinschaft (Qu148)
Received: 30 November 2019
Accepted: 18 May 2020
First Online: 29 May 2020
: All animal work was conducted according to relevant national and international guidelines. Field procedures and animal manipulations were approved by the Animal Ethic Committee of the Institut Polaire Français Paul Emile Victor (Programme N°109, HW), and by the Préfet des Terres Australes et Antarctiques Françaises.
: Not applicable.
: We declare that we have no conflict of interest.