A review of Canadian Arctic killer whale (Orcinus orca) ecology

The killer whale (Orcinus orca (Linnaeus, 1758)) is a widely distributed marine predator with a broad ecological niche at the species level with evidence of specialization and narrow ecological niches among populations. Their occurrence in Canadian Arctic waters is limited by sea ice and it has been suggested that climate warming, which has caused increases in the area of ice-free water and duration of the ice-free season, has led to an increased killer whale presence during the open-water period. In this review, we summarize our knowledge of Canadian Arctic killer whale demographics and ecology, synthesizing published and previously unpublished information in a single document. More specifically, we summarize our knowledge of killer whale population size and trends, distribution and seasonality (including results from recent satellite-tracking studies), feeding ecology, and threats, and identify research priorities in the Canadian Arctic. Despite increased research efforts during the past decade, our demographic and ecological knowledge remains incomplete. An improved ecological understanding is necessary for effective management of killer whales and their prey, species of ecological, economic, and cultural importance to Canadian Inuit and the marine ecosystem. This knowledge will allow us to better understand the ecological consequences of a changing Arctic climate.

[1]  R. Pitman,et al.  Three forms of killer whales (Orcinus orca) in Antarctic waters , 2023, J. Cetacean Res. Manage..

[2]  G. Breed,et al.  Killer whale presence drives bowhead whale selection for sea ice in Arctic seascapes of fear , 2020, Proceedings of the National Academy of Sciences.

[3]  S. Raverty,et al.  Ice entrapment mortality may slow expanding presence of Arctic killer whales , 2019, Polar Biology.

[4]  Marla M. Holt,et al.  Kinematic signatures of prey capture from archival tags reveal sex differences in killer whale foraging activity , 2019, Journal of Experimental Biology.

[5]  Nicholas J. Davison,et al.  Killer whale genomes reveal a complex history of recurrent admixture and vicariance , 2019, bioRxiv.

[6]  K. Stafford.  Increasing detections of killer whales ( Orcinus orca ), in the Pacific Arctic , 2018, Marine Mammal Science.

[7]  B. McConnell,et al.  Predicting global killer whale population collapse from PCB pollution , 2018, Science.

[8]  M. Mallory,et al.  Financial costs of conducting science in the Arctic: examples from seabird research , 2018, Arctic Science.

[9]  R. Dietz,et al.  Blubber-depth distribution and bioaccumulation of PCBs and organochlorine pesticides in Arctic-invading killer whales. , 2017, The Science of the total environment.

[10]  P. Miller,et al.  Movements and site fidelity of killer whales (Orcinus orca) relative to seasonal and long-term shifts in herring (Clupea harengus) distribution , 2017 .

[11]  S. Ferguson,et al.  Review of killer whale (Orcinus orca) ice entrapments and ice-related mortality events in the Northern Hemisphere , 2017, Polar Biology.

[12]  J. Davies,et al.  Behavioural Changes in Belugas ( Delphinapterus leucas ) During a Killer Whale ( Orcinus orca ) Attack in Southwest Hudson Bay , 2017 .

[13]  G. Breed,et al.  Sustained disruption of narwhal habitat use and behavior in the presence of Arctic killer whales , 2017, Proceedings of the National Academy of Sciences.

[14]  Ian Jonsen,et al.  Joint estimation over multiple individuals improves behavioural state inference from animal movement data , 2016, Scientific Reports.

[15]  Andrew C. Thomas,et al.  Slow adaptation in the face of rapid warming leads to collapse of the Gulf of Maine cod fishery , 2015, Science.

[16]  W. Perryman,et al.  Photogrammetry of killer whales using a small hexacopter launched at sea1 , 2015 .

[17]  J. Higdon.  Inuit Recollections of a 1950s Killer Whale (Orcinus orca) Ice Entrapment in Foxe Basin, Nunavut, Canada , 2014 .

[18]  Thorsten Markus,et al.  Changes in Arctic melt season and implications for sea ice loss , 2014 .

[19]  M. Hebblewhite,et al.  Status and Ecological Effects of the World’s Largest Carnivores , 2014, Science.

[20]  S. Ferguson,et al.  Spatial segregation and similar trophic-level diet among eastern Canadian Arctic/north-west Atlantic killer whales inferred from bulk and compound specific isotopic analysis , 2013, Journal of the Marine Biological Association of the United Kingdom.

[21]  Jack W. Lawson,et al.  Historic and current distribution patterns, and minimum abundance of killer whales (Orcinus orca) in the north-west Atlantic , 2013, Journal of the Marine Biological Association of the United Kingdom.

[22]  S. Ferguson,et al.  Attitudes of Nunavut Inuit toward Killer Whales ( Orcinus orca ) , 2013 .

[23]  S. Ferguson,et al.  Distribution and abundance of killer whales (Orcinus orca) in Nunavut, Canada—an Inuit knowledge survey , 2013, Journal of the Marine Biological Association of the United Kingdom.

[24]  P. Jepson,et al.  Occurrence of killer whale Orcinus orca rake marks on Eastern Canada-West Greenland bowhead whales Balaena mysticetus , 2013, Polar Biology.

[25]  A. Terauds,et al.  Killer whale ecotypes: is there a global model? , 2013, Biological reviews of the Cambridge Philosophical Society.

[26]  T. Byers,et al.  Observations of killer whales (Orcinus orca) in the Canadian Beaufort Sea , 2012, Polar Record.

[27]  D. Hauser,et al.  Killer whales (Orcinus orca) in the Canadian Arctic: Distribution, prey items, group sizes, and seasonality , 2012 .

[28]  Lance G. Barrett-Lennard,et al.  Call diversity in the North Pacific killer whale populations: implications for dialect evolution and population history , 2012, Animal Behaviour.

[29]  S. Ferguson,et al.  Prey items and predation behavior of killer whales (Orcinus orca) in Nunavut, Canada based on Inuit hunter interviews , 2012, Aquatic biosystems.

[30]  J. Durban,et al.  Antarctic killer whales make rapid, round-trip movements to subtropical waters: evidence for physiological maintenance migrations? , 2011, Biology Letters.

[31]  C. Guinet,et al.  Observations of a distinctive morphotype of killer whale (Orcinus orca), type D, from subantarctic waters , 2011, Polar Biology.

[32]  Russel D. Andrews,et al.  Satellite tracking of a killer whale (Orcinus orca) in the eastern Canadian Arctic documents ice avoidance and rapid, long-distance movement into the North Atlantic , 2011, Polar Biology.

[33]  S. Ferguson,et al.  Killer whale (Orcinus orca) photo-identification in the eastern Canadian Arctic , 2011 .

[34]  John K. B. Ford,et al.  Species and stock identification of prey consumed by endangered southern resident killer whales in their summer range , 2010 .

[35]  E. Willerslev,et al.  Ecological, morphological and genetic divergence of sympatric North Atlantic killer whale populations , 2009, Molecular ecology.

[36]  S. Ferguson,et al.  Loss of Arctic sea ice causing punctuated change in sightings of killer whales (Orcinus orca) over the past century. , 2009, Ecological applications : a publication of the Ecological Society of America.

[37]  J. Estes,et al.  Mammal-eating killer whales, industrial whaling, and the sequential megafaunal collapse in the North Pacific Ocean: A reply to critics of Springer et al. 2003 , 2008 .

[38]  S. Moore,et al.  Arctic marine mammals and climate change: impacts and resilience. , 2008, Ecological applications : a publication of the Ecological Society of America.

[39]  John K. B. Ford,et al.  KILLER WHALES, WHALING, AND SEQUENTIAL MEGAFAUNAL COLLAPSE IN THE NORTH PACIFIC: A COMPARATIVE ANALYSIS OF THE DYNAMICS OF MARINE MAMMALS IN ALASKA AND BRITISH COLUMBIA FOLLOWING COMMERCIAL WHALING , 2007 .

[40]  John K. B. Ford,et al.  KILLER WHALES AND MARINE MAMMAL TRENDS IN THE NORTH PACIFIC—A RE-EXAMINATION OF EVIDENCE FOR SEQUENTIAL MEGAFAUNA COLLAPSE AND THE PREY-SWITCHING HYPOTHESIS , 2007 .

[41]  W. Perryman,et al.  A DWARF FORM OF KILLER WHALE IN ANTARCTICA , 2007 .

[42]  K. Laidre,et al.  Reactions of Narwhals, Monodon monoceros , to Killer Whale, Orcinus orca , Attacks in the Eastern Canadian Arctic , 2006 .

[43]  S. Mizroch,et al.  Have north pacific killer whales switched prey species in response to depletion of the great whale populations , 2006 .

[44]  J. Hoef,et al.  The sequential megafaunal collapse hypothesis: Testing with existing data , 2006 .

[45]  Ian D. Jonsen,et al.  ROBUST STATE-SPACE MODELING OF ANIMAL MOVEMENT DATA , 2005 .

[46]  T. Williams,et al.  Sequential megafaunal collapse in the North Pacific Ocean: An ongoing legacy of industrial whaling? , 2003, Proceedings of the National Academy of Sciences of the United States of America.

[47]  Tinker,et al.  Killer whale predation on sea otters linking oceanic and nearshore ecosystems , 1998, Science.

[48]  John K. B. Ford,et al.  Dietary specialization in two sympatric populations of killer whales (Orcinus orca) in coastal British Columbia and adjacent waters , 1998 .

[49]  J. George,et al.  Observations of killer whale (Orcinus orca) predation in the northeastern Chukchi and western Beaufort Seas , 1998 .

[50]  R. W. Baird,et al.  Ecological and social determinants of group size in transient killer whales , 1996 .

[51]  J. Ford,et al.  The mixed blessing of echolocation: differences in sonar use by fish-eating and mammal-eating killer whales , 1996, Animal Behaviour.

[52]  R. W. Baird,et al.  Variation in saddle patch pigmentation in populations of killer whales (Orcinus orca) from British Columbia, Alaska, and Washington State , 1988 .

[53]  James H. W. Hain,et al.  Vocalizations and Feeding Behavior of the Killer Whale (Orcinus orca) , 1979 .

[54]  R Core Team,et al.  R: A language and environment for statistical computing. , 2014 .

[55]  M. Kingsley,et al.  Killer whale (Orcinus orca) predation in a multi-prey system , 2011, Population Ecology.

[56]  J. Higdon.  Status of knowledge on killer whales (Orcinus orca) in the Canadian Arctic État des connaissances sur les épaulards (Orcinus orca) dans les eaux canadiennes de l'Arctique , 2007 .

[57]  Coeur d'Alene Salamander.  COSEWIC Assessment and Update Status Report on the , 2007 .

[58]  L. Barrett‐Lennard,et al.  Population Structure and Genetic Variability in Northeastern Pacific Killer Whales: Towards an Assessment of Population Viability , 2001 .

[59]  K. Finley.  Isabella Bay, Baffin Island: An Important Historical and Present-day Concentration Area for the Endangered Bowhead Whale (Balaena mysticetus) of the Eastern Canadian Arctic , 1990 .

[60]  D. Sergeant,et al.  The Smaller Cetacea of Eastern Canadian Waters , 1957 .