First acoustic detection of Franciscana dolphin (Pontoporia blainvillei) near of artisanal fishing nets in southern coast of Buenos Aires, Argentina

GISELA V GIARDINO; MELANIA A COSENTINO; GIUSEPPA BUSCAINO; BASTIDA, RICARDO; DIEGO RODRÍGUEZ

Berlin

Congreso; 6th International Conference - The Effects of Noise on Aquatic Life,; 2022

the Acoustical Society of America

Our main interest is to detect the acoustic presence of franciscana dolphins in an area with active bycatch. To meet that objective, two dolphin click detectors (FPODS) were placed in two artisanal fishing gillnets in Claromecó (Buenos Aires Province, Argentina). We found high frequency and narrow band (HFNB) clicks in both gillnets (compatible with the description of the franciscana sound production). These preliminary results confirm that passive acoustic is a good tool to assess franciscana presences. Moreover, understanding the echolocation behavior around the nets would lead in design better mitigation tools in order to reduce the bycatch