This secondment allowed preparing the logistics for the third fieldwork at Fernando de Noronha (to be realized in September 2018): instruments and survey design preparation, team recruitment, legal authorizations. We continued the long term work on the statistical modeling of these data, aiming at segmenting the raw GPS tracks collected on fishing vessels and seabirds into different behavioural modes (travelling, searching, fishing) and then produce accurate data on space-use at -sea. We trained and supervised master students on seabird space use (UFAL, Leila Figueiredo; IRD, Amédée Roy) and on the artisanal fishery space-use (UFRPE, Tatiana Beltrao; UFAL Samantha Pereira).