June 12, 2024

Rough-Toothed Dolphins (Steno bredanensis) Catch Diskfishes while Interacting with Humpback Whales (Megaptera novaeangliae) off Abrolhos Bank Breeding Ground, Southwest Atlantic


Leonardo L. Wedekin, Ana Freitas, Márcia H. Engel, and Ivan Sazima


Abstract: We provide a summary of interactions between humpback whales (Megaptera novaeangliae) and rough-toothed dolphins (Steno bredanensis) observed during a long-term study conducted at the Abrolhos Bank off Brazil, with additional notes on the behaviour of both cetacean species. One dolphin caught and likely preyed on a diskfish (Echeneidae) while interacting with the whales, these latter displaying avoidance behaviour. This encounter may be regarded as a negative interaction with short-term and nonlethal impacts on the whales. In addition, we present evidence that the sharksucker (Echeneis naucrates) is preyed on by the rough-toothed dolphin while interacting with the whales.

Key Words: humpback whale, Megaptera novaeangliae, rough-toothed dolphin, Steno bredanensis, remora, Echeneis naucrates, interspecific interaction, feeding behaviour, sharksucker

Document Type: Research article

DOI: 10.1578/AM.30.2.2004.327

Page Numbers: 327-329

Info SKU: Vol__30__Iss__2__Wedekin_et_al Category: