**Author details**

Salustiano Mato1 , Carlos Pérez-Losada2 , María Martínez-Abraldes2 and Iria Villar1 \*

1 Department of Ecology and Animal Biology, University of Vigo, Vigo, Spain

2 Pontevedra Provincial Council, Pontevedra, Spain

\*Address all correspondence to: iriavillar@uvigo.es

© 2019 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
