Funding for this research was provided by:
Royal Society of Edinburgh (59117)
Rural and Environment Science and Analytical Services Division
Received: 14 November 2019
Accepted: 26 June 2020
First Online: 6 July 2020
: The study protocol was reviewed and approved by the University of Aberdeen’s College of Life Sciences & Medicine Ethics Research Board (CERB/2018/6/1638).
: Not applicable.
: The authors declare that they have no competing interests.