Jeff W. Higdon
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View article: Killer whale range expansion and extended seasonal presence in the eastern Canadian Arctic, 2002-2023
Killer whale range expansion and extended seasonal presence in the eastern Canadian Arctic, 2002-2023 Open
Introduction This study examines 20 years of killer whale ( Orcinus orca ) sightings (2002–2023) in the eastern Canadian Arctic, drawing from a comprehensive sighting database spanning 1850–2023. Despite inherent biases favoring data colle…
View article: Fish, Invertebrate, and Marine Mammal Bycatch in a Central Canadian Commercial Fishery for Arctic Char
Fish, Invertebrate, and Marine Mammal Bycatch in a Central Canadian Commercial Fishery for Arctic Char Open
Cambridge Bay, Nunavut, hosts Canada’s largest Arctic Char Salvelinus alpinus commercial fishery with waterbody-specific quotas managed under one Integrated Fisheries Management Plan that emphasizes ecosystem-based management and the need …
View article: A comparative analysis of life-history features and adaptive strategies of Arctic and subarctic seal species—who will win the climate change challenge?
A comparative analysis of life-history features and adaptive strategies of Arctic and subarctic seal species—who will win the climate change challenge? Open
Understanding and predicting species range shifts is crucial for conservation amid global warming. This study analyzes life-history traits of four seal species (ringed ( Pusa hispida (Schreber, 1775)), bearded ( Erignathus barbatus (Erxleb…
View article: Climate change introduces threatened killer whale populations and conservation challenges to the Arctic
Climate change introduces threatened killer whale populations and conservation challenges to the Arctic Open
The Arctic is the fastest‐warming region on the planet, and the lengthening ice‐free season is opening Arctic waters to sub‐Arctic species such as the killer whale ( Orcinus orca ). As apex predators, killer whales can cause significant ec…
View article: Referee report. For: Archaeological evidence of resource utilisation of walrus, Odobenus rosmarus, over the past two millennia: A systematic review protocol [version 1; peer review: 2 approved]
Referee report. For: Archaeological evidence of resource utilisation of walrus, Odobenus rosmarus, over the past two millennia: A systematic review protocol [version 1; peer review: 2 approved] Open
View article: Climate change introduces threatened killer whale populations and conservation challenges to the Arctic
Climate change introduces threatened killer whale populations and conservation challenges to the Arctic Open
The Arctic is the fastest-warming region on the planet, and sea ice loss has opened new habitat for sub-Arctic species such as the killer whale ( Orcinus orca ). As apex predators, killer whales can cause significant ecosystem-scale change…
View article: A review of aerial survey density estimates of bearded seals (Erignathus barbatus) in the Canadian Arctic highlights important knowledge gaps and research needs
A review of aerial survey density estimates of bearded seals (Erignathus barbatus) in the Canadian Arctic highlights important knowledge gaps and research needs Open
There has been significant sea ice loss in the Arctic as a result of climate change, with measurable impacts on available habitat for ice-obligate marine mammals. Bearded seals ( Erignathus barbatus ) have a circumpolar distribution and pr…
View article: Investigating the Relationship Between Body Shape and Life History Traits in Toothed Whales: Can Body Shape Predict Fast-Slow Life Histories?
Investigating the Relationship Between Body Shape and Life History Traits in Toothed Whales: Can Body Shape Predict Fast-Slow Life Histories? Open
View article: Does body shape of toothed whales foretell fast-slow life histories?
Does body shape of toothed whales foretell fast-slow life histories? Open
A widespread pattern in vertebrate life-history evolution is for species to evolve towards either fast or slow life histories; however, the possible causes of this pattern are multiple. Toothed whales (Odontoceti) are a particularly specio…
View article: Killer Whale (Orcinus orca) Pulsed Calls in the Eastern Canadian Arctic
Killer Whale (Orcinus orca) Pulsed Calls in the Eastern Canadian Arctic Open
Killer whales (Orcinus orca) produce a variety of acoustic signal types used for communication: clicks, whistles, and pulsed calls. Discrete pulsed calls are highly stereotyped, repetitive, and unique to individual pods found around the wo…
View article: The State of Knowledge about Grizzly Bears (Kakenokuskwe osow Muskwa (Cree), Ursus arctos) in Northern Manitoba
The State of Knowledge about Grizzly Bears (Kakenokuskwe osow Muskwa (Cree), Ursus arctos) in Northern Manitoba Open
Grizzly bears have been observed with increasing frequency in northern Manitoba, Canada over the last four decades (1980 – 2020), likely originating from the established population in Nunavut and the Northwest Territories. We summarize and…
View article: Developing a Precautionary Management Approach for the Eastern Canada-West Greenland Population of Bowhead Whales (Balaena mysticetus)
Developing a Precautionary Management Approach for the Eastern Canada-West Greenland Population of Bowhead Whales (Balaena mysticetus) Open
Bowhead whales ( Balaena mysticetus L., 1758) of the Eastern Canada-West Greenland population have been hunted by Inuit for millennia. Significant commercial harvests, conducted by European and American whalers for about 400 years, ended c…
View article: Polar bear denning distribution in the Canadian Arctic
Polar bear denning distribution in the Canadian Arctic Open
Declines in Arctic sea ice associated with climate change have resulted in habitat loss for ice-adapted species, while facilitating increased human development at higher latitudes. Development increases land-use and shipping traffic, which…
View article: A review of Canadian Arctic killer whale (<i>Orcinus orca</i>) ecology
A review of Canadian Arctic killer whale (<i>Orcinus orca</i>) ecology Open
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…
View article: Where else? Assessing zones of alternate ballast water exchange in the Canadian eastern Arctic
Where else? Assessing zones of alternate ballast water exchange in the Canadian eastern Arctic Open
Mid-ocean ballast water exchange (BWE) is recommended for international vessels to minimize the transfer of nonindigenous species (NIS). When this cannot be accomplished due to safety concerns, alternate ballast water exchange zones (ABWEZ…
View article: Correction: Evidence of molting and the function of "rock-nosing" behavior in bowhead whales in the eastern Canadian Arctic
Correction: Evidence of molting and the function of "rock-nosing" behavior in bowhead whales in the eastern Canadian Arctic Open
[This corrects the article DOI: 10.1371/journal.pone.0186156.].
View article: Evidence of molting and the function of “rock-nosing” behavior in bowhead whales in the eastern Canadian Arctic
Evidence of molting and the function of “rock-nosing” behavior in bowhead whales in the eastern Canadian Arctic Open
Bowhead whales (Balaena mysticetus) have a nearly circumpolar distribution, and occasionally occupy warmer shallow coastal areas during summertime that may facilitate molting. However, relatively little is known about the occurrence of mol…
View article: Beluga whale summer habitat associations in the Nelson River estuary, western Hudson Bay, Canada
Beluga whale summer habitat associations in the Nelson River estuary, western Hudson Bay, Canada Open
To understand beluga whale (Delphinapterus leucas) estuarine use in the Nelson River estuary, southwest Hudson Bay, we recorded and examined beluga movements and habitat associations for the July through August period in 2002-2005. We comp…
View article: Sustained disruption of narwhal habitat use and behavior in the presence of Arctic killer whales
Sustained disruption of narwhal habitat use and behavior in the presence of Arctic killer whales Open
Significance Predators are widely understood to impact the structure and stability of ecosystems. In the Arctic, summer sea ice is rapidly declining, degrading habitat for Arctic species, such as polar bears and ringed seals, but also prov…
View article: Dietary habits of polar bears in Foxe Basin, Canada: possible evidence of a trophic regime shift mediated by a new top predator
Dietary habits of polar bears in Foxe Basin, Canada: possible evidence of a trophic regime shift mediated by a new top predator Open
Polar bear ( Ursus maritimus ) subpopulations in several areas with seasonal sea ice regimes have shown declines in body condition, reproductive rates, or abundance as a result of declining sea ice habitat. In the Foxe Basin region of Nuna…
View article: Appendix A. Database of reported killer whale sightings in the Hudson Bay region.
Appendix A. Database of reported killer whale sightings in the Hudson Bay region. Open
Database of reported killer whale sightings in the Hudson Bay region.