Funding for this research was provided by:
Dirección Xeral da Xunta de Galicia
Ministerio de Educación y Ciencia
Article History
Received: 24 January 2018
Revised: 13 March 2018
Accepted: 14 March 2018
First Online: 5 April 2018
Compliance with ethical standards
:
: The authors declare that they have no competing interests.
: All applicable, national, and/or institutional guidelines for the care and use of animals were followed.
: All necessary permits for sampling and observational field studies have been obtained by the authors from the competent authorities and are mentioned in the acknowledgements, if applicable.