Observations of Attacks on Sei and Fin Whales by Killer Whales in Magellanic Sub-Antarctic Waters, Chile Author Schüttler, Elke Sub-Antarctic Biocultural Conservation Program, Universidad de Magallanes, Puerto Williams, Chile & Cape Horn International Center (CHIC), Puerto Williams, Chile elke.schuttler@umag.cl Author Gañan, Melisa Sub-Antarctic Biocultural Conservation Program, Universidad de Magallanes, Puerto Williams, Chile & Cape Horn International Center (CHIC), Puerto Williams, Chile & Millenium Institute Biodiversity of Antarctic and Subantarctic Ecosystems (BASE), Santiago, Chile & Núcleo Milenio de Salmónidos Invasores (INVASAL), Concepción, Chile Author Barroso, Omar Sub-Antarctic Biocultural Conservation Program, Universidad de Magallanes, Puerto Williams, Chile & Cape Horn International Center (CHIC), Puerto Williams, Chile Author Contador, Tamara Sub-Antarctic Biocultural Conservation Program, Universidad de Magallanes, Puerto Williams, Chile & Cape Horn International Center (CHIC), Puerto Williams, Chile & Millenium Institute Biodiversity of Antarctic and Subantarctic Ecosystems (BASE), Santiago, Chile & Núcleo Milenio de Salmónidos Invasores (INVASAL), Concepción, Chile Author Illanes, Diego Servicio Nacional de Pesca y Acuicultura (SERNAPESCA), Puerto Williams, Chile Author Muñoz-Araya, Gabriel Sub-Antarctic Biocultural Conservation Program, Universidad de Magallanes, Puerto Williams, Chile & Cape Horn International Center (CHIC), Puerto Williams, Chile Author Palma, María-José Master of Science Program, Management and Conservation of Natural Resources in Sub-Antarctic Environments, Universidad de Magallanes, Punta Arenas, Chile Author Pérez-Álvarez, María-José Millenium Institute Biodiversity of Antarctic and Subantarctic Ecosystems (BASE), Santiago, Chile & Centro de Investigación Eutropia, Santiago, Chile & Instituto de Ecología y Biodiversidad, Facultad de Ciencias, Universidad de Chile, Santiago, Chile & Departamento de Ciencias Ecológicas, Facultad de Ciencias, Universidad de Chile, Santiago, Chile Author Sepúlveda, Maritza Núcleo Milenio de Salmónidos Invasores (INVASAL), Concepción, Chile & Centro de Investigación Eutropia, Santiago, Chile & Centro de Investigación y Gestión de Recursos Naturales (CIGREN), Instituto de Biología, Facultad de Ciencias, Universidad de Valparaíso, Valparaíso, Chile Author Rendoll-Cárcamo, Javier Sub-Antarctic Biocultural Conservation Program, Universidad de Magallanes, Puerto Williams, Chile & Cape Horn International Center (CHIC), Puerto Williams, Chile & Millenium Institute Biodiversity of Antarctic and Subantarctic Ecosystems (BASE), Santiago, Chile & Núcleo Milenio de Salmónidos Invasores (INVASAL), Concepción, Chile text Aquatic Mammals 2024 2024-07-15 50 4 332 341 https://doi.org/10.1578/am.50.4.2024.332 journal article 10.1578/am.50.4.2024.332 0167-5427 15064768

Table 1. Description of attacks by killer whales (Orcinus orca) on sei (Balaenoptera borealis) and fin (Balaenoptera physalus) whales in the Beagle Channel, sub-Antarctic Chile. SV = Supplemental Video.

Record	Data	Site	Coordinates	Date (d/mo/y)	Species	Individuals (No.)	Description
Event 1	Observation (SV 1, 2, 3)	Puerto Williams	54° 55' 55" S, 67° 36' 49" W	9/3/2020	B. borealis	2	Fatal attack
Event 2	Photo/video record (SV 4)	Vuelta Perro	54° 55' 49" S, 67° 23' 33" W	9/2/2021	B. borealis	1	Stranded; bite marks on tail and abdomen
Event 3	Photo record (SV 5)	Tres Mares	54° 56' 04" S, 67° 17' 44" W	26/2/2021	B. borealis	4 (1 male and 2 females confirmed + 1 fetus)	Stranded; bite marks on tail and head
Event 4	Video record (SV 6)	Holger Passage	54° 56' 30" S, 67° 14' 16" W	26/2/2021	B. borealis	2	Fatal attack
Event 5	Observation (SV 7)	Puerto Williams	54° 55' 59" S, 67° 36' 44" W	11/4/2021	B. borealis	3	Failed attack
Event 6	Observation (SV 8)	Puerto Williams	54° 56' 1" S, 67° 37' 8" W	22/4/2021	B. physalus	2	Fatal attack (1 confirmed individual)