Killer whale ecotypes : is there a global model?

Show simple item record De Bruyn, P.J. Nico Tosh, Cheryl A. Terauds, Aleks 2013-05-22T07:28:21Z 2014-01-31T00:20:04Z 2013-02
dc.description.abstract Killer whales, Orcinus orca, are top predators occupying key ecological roles in a variety of ecosystems and are one of the most widely distributed mammals on the planet. In consequence, there has been significant interest in understanding their basic biology and ecology. Long-term studies of Northern Hemisphere killer whales, particularly in the eastern North Pacific (ENP), have identified three ecologically distinct communities or ecotypes in that region. The success of these prominent ENP studies has led to similar efforts at clarifying the role of killer whale ecology in other regions, including Antarctica. In the Southern Hemisphere, killer whales present a range of behavioural, social and morphological characteristics to biologists, who often interpret this as evidence to categorize individuals or groups, and draw general ecological conclusions about these super-predators. Morphologically distinct forms (Type A, B, C, and D) occur in the Southern Ocean and studies of these different forms are often presented in conjunction with evidence for specialised ecology and behaviours. Here we review current knowledge of killer whale ecology and ecotyping globally and present a synthesis of existing knowledge. In particular, we highlight the complexity of killer whale ecology in the Southern Hemisphere and examine this in the context of comparatively well-studied Northern Hemisphere populations. We suggest that assigning erroneous or prefatory ecotypic status in the Southern Hemisphere could be detrimental to subsequent killer whale studies, because unsubstantiated characteristics may be assumed as a result of such classification. On this basis, we also recommend that ecotypic status classification for Southern Ocean killer whale morphotypes be reserved until more evidence-based ecological and taxonomic data are obtained. en_US
dc.description.librarian hb2013 en_US
dc.description.sponsorship South African Department of Science and Technology, National Research Foundation (NRF), The Marine Mammal Programme of the MRI. The Mohamed bin Zayed Species Conservation Fund (Project number : 10251290) and the Thuthuka programme (NRF). en_US
dc.description.uri en_US
dc.identifier.citation De Bruyn, PJN, Tosh, C & Terauds, A 2013, 'Killer whale ecotypes : is there a global model?', Biological Reviews, vol. 88, no. 1, pp. 62-80. en_US
dc.identifier.issn 1464-7931 (print)
dc.identifier.issn 1469-185X (online)
dc.identifier.other 10.1111/j.1469-185X.2012.00239.x
dc.language.iso en en_US
dc.publisher John Wiley & Sons, Inc. en_US
dc.rights © 1999–2013 John Wiley & Sons, Inc. All Rights Reserved. The definite version is available at en_US
dc.subject Killer whale en_US
dc.subject Orcinus orca en_US
dc.subject Southern Ocean en_US
dc.subject Antarctica en_US
dc.subject Sub-Antarctic en_US
dc.subject Eastern North Pacific en_US
dc.subject North Atlantic en_US
dc.title Killer whale ecotypes : is there a global model? en_US
dc.type Postprint Article en_US

Files in this item

This item appears in the following Collection(s)

Show simple item record