open access publication

Article, 2024

Dolphin and porpoise detections by the F-POD are not independent: Implications for sympatric species monitoring

JASA EXPRESS LETTERS, Volume 4, 3, 10.1121/10.0025304

Contributors

Cosentino, Mel 0000-0001-7837-8669 [1] Marcolin, Cristina [1] Griffiths, Emily T. [1] Sanchez-Cami, Estel [1] Tougaard, Jakob (Corresponding author) [1]

Affiliations

  1. [1] Aarhus Univ, Dept Ecosci, DK-8000 Aarhus, Denmark
  2. [NORA names: AU Aarhus University; University; Denmark; Europe, EU; Nordic; OECD]

Abstract

The F-POD is designed for passive acoustic monitoring of odontocetes. The offline classifiers can identify and separate porpoise-like sounds from dolphin-like sounds. We show that these two classifiers are not working independently. Run together, virtually no detections of both species were reported within the same minute, whereas 10% of the detection positive minutes were reported positive for both species when the two classifiers were run sequentially. This has important implications for interpretation of data in areas containing both species groups, and we call for reporting all analysis details in such studies and for further description and analysis of the classifiers.

Data Provider: Clarivate