(e) Acknowledgements
C. Wertin, N. Bunn, and K. Paulling helped with logistics. UCSC ethics committee (IACUC) and CDFG provided permits for carrying out this investigation. NSF and Spanish Ministerio de Economía y Competitividad provided financial support (EEBB-I-14-08326 to RM-P and EF-1241848 to BS). RM-P enjoys a postdoctoral contract (CEECIND/04084/2017) by ICETA – Instituto de Ciências, Tecnologias e Agroambiente da Universidade do Porto and Fundação da Ciência e Tecnologia.