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Jack Orr
Fisheries and Oceans Canada
33Publications
13H-index
522Citations
Publications 33
Newest
#1David J. Yurkowski (UM: University of Manitoba)H-Index: 11
#2Marie Auger-Méthé (UBC: University of British Columbia)H-Index: 12
Last.Steven H. Ferguson (Fisheries and Oceans Canada)H-Index: 33
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Aim: Climate change is altering marine ecosystems worldwide and is most pronounced in the Arctic. Economic development is increasing leading to more disturbances and pressures on Arctic wildlife. Identifying areas that support higher levels of predator abundance and biodiversity is important for the implementation of targeted conservation measures across the Arctic. Location: Primarily Canadian Arctic marine waters but also parts of the United States, Greenland and Russia. Methods: We compiled t...
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#1Krista A. Kenyon (UM: University of Manitoba)
#2David J. Yurkowski (UM: University of Manitoba)H-Index: 11
Last.Steven H. FergusonH-Index: 33
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Arctic pack ice structure and extent have been changing due to warming. Thus, understanding important habitat features for marine mammals that depend on sea ice, such as narwhal (Monodon monoceros), during winter will provide insight into impacts of future changes within the pack ice. The objective of this study was to determine narwhal habitat selection for bathymetry, sea ice concentration, thickness, and floe size during the winter season. Nineteen narwhals were equipped with SPLASH tags in A...
Source
#1Nigel E. Hussey (U of W: University of Windsor)H-Index: 23
#2Jack Orr (Fisheries and Oceans Canada)H-Index: 13
Last.Amanda N. Barkley (U of W: University of Windsor)H-Index: 5
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Abstract The deep-sea is increasingly viewed as a lucrative environment for the growth of resource extraction industries. To date, our ability to study deep-sea species lags behind that of those inhabiting the photic zone limiting scientific data available for management. In particular, knowledge of horizontal movements is restricted to two locations; capture and recapture, with no temporal information on absolute animal locations between endpoints. To elucidate the horizontal movements of a lar...
4 CitationsSource
#1John J. Citta (Alaska Department of Fish and Game)H-Index: 10
#2Lloyd F. Lowry (UAF: University of Alaska Fairbanks)H-Index: 6
Last.Tom GrayH-Index: 2
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Abstract We collated available satellite telemetry data for six species of ice-associated marine mammals in the Pacific Arctic: ringed seals (Pusa hispida; n = 118), bearded seals (Erignathus barbatus, n = 51), spotted seals (Phoca largha, n = 72), Pacific walruses (Odobenus rosmarus divergens, n = 389); bowhead whales (Balaena mysticetus, n = 46), and five Arctic and sub-arctic stocks of beluga whales (Delphinapterus leucas, n = 103). We also included one seasonal resident, eastern North Pacifi...
2 CitationsSource
#1Alexander J. Smith (ENVIRON)H-Index: 2
#2Jeff W. HigdonH-Index: 12
Last.Steven H. Ferguson (Fisheries and Oceans Canada)H-Index: 33
view all 6 authors...
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 compared locations of belugas fitted with satellite transmitters (“tags”) (2002–2005) and aerial-surveyed (2003 and 2005) belugas for years of differing freshwater flow from the Nelson River which is influenced by hydroelectric activity. Using the beluga telemetry ...
4 CitationsSource
#1Kristin H. WestdalH-Index: 5
#2Jeremy DaviesH-Index: 1
Last.Steven H. FergusonH-Index: 33
view all 5 authors...
Killer Whales ( Orcinus orca ) were observed on 4 August 2012 attacking Belugas ( Delphinapterus leucas ) at high tide near the mouth of the Seal River (59°9'19"N, 94°45'28"W) in southwest Hudson Bay, near the location where six Belugas had been fitted with satellite transmitters three weeks earlier. The distribution of Belugas was analyzed before, during, and after the attack. In the presence of Killer Whales, the six Belugas altered their behaviour by reducing their combined range size from 28...
5 CitationsSource
#1Greg A. Breed (UAF: University of Alaska Fairbanks)H-Index: 21
#2Cory J. D. Matthews (Fisheries and Oceans Canada)H-Index: 3
Last.Steven H. Ferguson (Fisheries and Oceans Canada)H-Index: 33
view all 9 authors...
Although predators influence behavior of prey, analyses of electronic tracking data in marine environments rarely consider how predators affect the behavior of tracked animals. We collected an unprecedented dataset by synchronously tracking predator (killer whales, N = 1; representing a family group) and prey (narwhal, N = 7) via satellite telemetry in Admiralty Inlet, a large fjord in the Eastern Canadian Arctic. Analyzing the movement data with a switching-state space model and a series of mix...
19 CitationsSource
#1John J. Citta (Alaska Department of Fish and Game)H-Index: 10
#2Pierre R Richard (Fisheries and Oceans Canada)H-Index: 7
Last.Matthew L. Druckenmiller (CU: University of Colorado Boulder)H-Index: 3
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At least five populations (stocks) of beluga whales (Delphinapterus leucas) are thought to winter in the Being Sea, including the Bristol Bay, Eastern Bering Sea (Norton Sound), Anadyr, Eastern Chukchi Sea, and Eastern Beaufort Sea (Mackenzie) populations. Belugas from each population have been tagged with satellite-linked transmitters, allowing us to describe their winter (January–March) distribution. The objectives of this paper were to determine: (1) If each population winters in the Bering S...
12 CitationsSource
#1Cortney A. Watt (UM: University of Manitoba)H-Index: 3
#2Jack Orr (Fisheries and Oceans Canada)H-Index: 13
Last.Steven H. Ferguson (UM: University of Manitoba)H-Index: 33
view all 3 authors...
In Canada, narwhals (Monodon monoceros L., 1758) are divided into the Baffin Bay (BB) and northern Hudson Bay (NHB) populations. Satellite tracking of 21 narwhals from BB and NHB provided information on their diving behaviour and was used to identify foraging regions. Previous research from hunted narwhals indicated that narwhals in both populations depend on benthic prey to meet their dietary needs. To evaluate home ranges and define areas important for benthic foraging, we conducted kernel den...
2 CitationsSource
#1Cortney A. WattH-Index: 3
#2Jack OrrH-Index: 13
Last.Steven H. FergusonH-Index: 33
view all 3 authors...
6 CitationsSource
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