Evidences of attack of a killer whale on a calf southern right whale in southern Brazil

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Abstract

La orca (Orcinus orca) presenta una distribución global y una gran variación en los hábitos tróficos de sus poblaciones. En el Océano Atlántico Sur, el conocimiento sobre la distribución y la dieta de la especie es todavía escaso. En este trabajo, presentamos la primera evidencia de ataque de una orca a una ballena franca austral (Eubalaena australis) en aguas brasileñas y reportamos nuevos registros de avistamientos de orcas en aguas costeras de la región más austral de Brasil.

Translated abstract

The killer whale (Orcinus orca) has a worldwide distribution and its feeding habits varies greatly among populations. In the southern Atlantic Ocean, knowledge about the distribution and diet of the species is still scarce. Herein we report the first evidence of a killer whale’s attack on a southern right whale (Eubalaena australis) in Brazilian waters and provide new records of killer whale sightings in coastal waters of the southernmost Brazilian region.

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Most cited references 34

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A review of Killer Whale interactions with other marine mammals: predation to co-existence

Thomas Jefferson, PAM STACEY, Robin W. Baird (1991)

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Fight or flight: antipredator strategies of baleen whales

John K B Ford, Randall Reeves (2008)

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Is Open Access

Antarctic killer whales make rapid, round-trip movements to subtropical waters: evidence for physiological maintenance migrations?

J. W. Durban, R. L. Pitman (2011)

Killer whales (Orcinus orca) are important predators in high latitudes, where their ecological impact is mediated through their movements. We used satellite telemetry to provide the first evidence of migration for killer whales, characterized by fast (more than 12 km h−1, 6.5 knots) and direct movements away from Antarctic waters by six of 12 type B killer whales tagged when foraging near the Antarctic Peninsula, including all tags transmitting for more than three weeks. Tags on five of these whales revealed consistent movements to subtropical waters (30–37° S) off Uruguay and Brazil, in surface water temperatures ranging from −1.9°C to 24.2°C; one 109 day track documented a non-stop round trip of almost 9400 km (5075 nmi) in just 42 days. Although whales travelled slower in the warmest waters, there was no obvious interruption in swim speed or direction to indicate calving or prolonged feeding. Furthermore, these movements were aseasonal, initiating over 80 days between February and April; one whale returned to within 40 km of the tagging site at the onset of the austral winter in June. We suggest that these movements may represent periodic maintenance migrations, with warmer waters allowing skin regeneration without the high cost of heat loss: a physiological constraint that may also affect other whales.

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Author and article information

Contributors

Paulo H Ott: Role: ND

Federico Sucunza: Role: ND

Janaína Wickert: Role: ND

Daniel Danilewicz: Role: ND

Maurício Tavares: Role: ND

Journal

Journal ID (publisher-id): mznt

Title: Mastozoología neotropical

Abbreviated Title: Mastozool. neotrop.

Publisher: Sociedad Argentina para el Estudio de los Mamíferos (SAREM) (Mendoza, Mendoza, Argentina )

ISSN (Print): 0327-9383

ISSN (Electronic): 1666-0536

Publication date (Print and electronic): June 2017

Volume: 24

Issue: 1

Pages: 235-240

Affiliations

[03] Torres RS orgnameGrupo de Estudos de Mamíferos Aquáticos do Rio Grande do Sul (GEMARS) Brazil

[06] Porto Alegre RS orgnameUniversidade Federal do Rio Grande do Sul (UFRGS) orgdiv1Programa de Pós-Graduação em Biologia Animal Brazi

[04] Juiz de Fora MG orgnameInstituto Aqualie Brazil

[01] orgnameUniversidade Estadual do Rio Grande do Sul (UERGS)

[05] Juiz de Fora MG orgnameUniversidade Federal de Juiz de Fora (UFJF) orgdiv1Programa de Pós-Graduação em Ecologia Brazil

[08] Ilhéus BA orgnameUniversidade Estadual de Santa Cruz (UESC) orgdiv1Programa de Pós-Graduação em Zoologia Brazil

[02] Osório RS orgnameUnidade do Litoral Norte Brazil

[07] Imbé RS orgnameUniversidade Federal do Rio Grande do Sul orgdiv1Instituto de Biociências orgdiv2Centro de Estudos Costeiros, Limnológicos e Marinhos Brazil

Article

Publisher ID: S0327-93832017000100020

SO-VID: ee291a89-b480-4f00-859b-fe3fbd02618c

License:

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

History

Date received : 13 February 2017

Date accepted : 31 March 2017

Page count

Figures: 0, Tables: 0, Equations: 0, References: 36, Pages: 6

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SciELO Argentina

Keywords: Eubalaena australis,Interacción predador-presa,Marcas de dientes,Orcinus orca,Varamiento,Predatory-prey interaction,Stranding,Tooth marks

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Keywords: Eubalaena australis, Interacción predador-presa, Marcas de dientes, Orcinus orca, Varamiento, Predatory-prey interaction, Stranding, Tooth marks

Translated title: Evidences of attack of a killer whale on a calf southern right whale in southern Brazil

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Abstract

Translated abstract

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SciELO Argentina

Most cited references 34

A review of Killer Whale interactions with other marine mammals: predation to co-existence

Fight or flight: antipredator strategies of baleen whales

Antarctic killer whales make rapid, round-trip movements to subtropical waters: evidence for physiological maintenance migrations?

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