Funding for this research was provided by:
Japan Society for the Promotion of Science (26450484, 19J20367)
Received: 18 December 2020
Accepted: 24 February 2021
First Online: 6 March 2021
: All procedures for sample collection from penguins were performed in accordance with the ethical standards of the Act on Welfare and Management of Animals 1973, Japan. No birds were harmed during sampling.
: Not applicable.
: The authors declare they have no competing interests.