Records of cestodes in varying lemmings and an arctic fox from Bathurst Island, Northwest Territories

1974 ◽  
Vol 52 (11) ◽  
pp. 1425-1426
Author(s):  
W. A. Webster
Keyword(s):  
Northwest Territories ◽  
Arctic Fox ◽  
Alopex Lagopus ◽  
Taenia Crassiceps ◽  
First Time ◽  
Dicrostonyx Torquatus

Cysticerci of Taenia crassiceps Rudolphi, 1810 and adult Andrya arctica Rausch, 1952 from Dicrostonyx torquatus, and Taenia polyacantha Leukart, 1856 from Alopex lagopus, are reported for the first time from Bathurst Island, Northwest Territories.

Predation of ringed seal pups (Phoca hispida) by the arctic fox (Alopex lagopus)

1976 ◽  
Vol 54 (10) ◽  
pp. 1610-1616 ◽  
Author(s):  
Thomas G. Smith
Keyword(s):  
Energy Budget ◽  
Ringed Seal ◽  
The Arctic ◽  
Maintenance Energy ◽  
Arctic Fox ◽  
Alopex Lagopus ◽  
Phoca Hispida ◽  
Important Predator ◽  
First Time

The arctic fox (Alopex lagopus), commonly assigned the role of scavenger of marine mammal remains left by polar hears (Ursus maritimus), is for the first time quantitatively described as an important predator of the pups of the ringed seal (Phoca hispida). Foxes enter and kill the seal pups in their subnivean birth lairs. In no case were any seals other than pups killed by foxes. While predation was seen to vary over the 3 years of study, an average pup predation of 26.1% in nearshore sea ice is estimated. Estimates of the contribution of seal pups to the fox energy budget are calculated. Newborn seal pups contribute a maximum of 45.2 and a minimum of 30.2 days of maintenance energy. Almost weaned pups provide a maximum of 341.5 and a minimum of 227 days of maintenance energy.

Effect of synthetic antioxidant on biochemical indices in blood of arctic fox (Alopex lagopus)

2008 ◽  
Vol 26 (3) ◽  
Author(s):  
Leon Saba ◽  
Beata Likos-Grzesiak ◽  
Bożena Nowakowicz-Dębek ◽  
Hanna Bis-Wencel ◽  
Justyna Martyna ◽  
...  
Keyword(s):  
Arctic Fox ◽  
Alopex Lagopus ◽  
Synthetic Antioxidant ◽  
Biochemical Indices

The sequence and correlation of Early Ordovician (Arenig) graptolite faunas in the Richardson Trough and Misty Creek Embayment, Yukon Territory and District of Mackenzie, Canada

2006 ◽  
Vol 43 (12) ◽  
pp. 1791-1820 ◽  
Author(s):  
D E Jackson ◽  
A C Lenz
Keyword(s):  
Northwest Territories ◽  
Deep Water ◽  
Yukon Territory ◽  
Early Ordovician ◽  
The Road ◽  
Bedded Chert ◽  
First Occurrence ◽  
Mackenzie Mountains ◽  
First Time

Four graptolite biozones are recorded from the Arenig portion of the Road River Group in the Richardson and Mackenzie mountains in the Yukon and Northwest Territories. In ascending order, these zones are Tetragraptus approximatus, Pendeograptus fruticosus, Didymograptus bifidus, and Parisograptus caduceus australis (new). The Castlemainian stage may be represented by nongraptolitic massive bedded chert. The Arenig–Llanvirn boundary is drawn below the first occurrence of Undulograptus austrodentatus. Fifty-four graptolite taxa are present, and 16 of these species and subspecies are recorded for the first time in this deep-water biotope, namely, Didymograptus? cf. adamantinus, D. asperus, D. dilatans, D. cf. kurcki, D. validus communis, Holmograptus aff. leptograptoides, H. sp. A, Isograptus? sp. nov. A, I. ? dilemma, Keblograptus geminus, Pseudisograptus manubriatus harrisi, Ps. m. koi, Ps. m. janus, Ps. cf. tau, Xiphograptus lofuensis, and Zygograptus cf. abnormis.

scholarly journals Energy Cost of Running in an Arctic Fox, Alopex lagopus

2003 ◽  
Vol 117 (3) ◽  
pp. 430 ◽  
Author(s):  
Eva Fuglei ◽  
Nils A. Øritsland
Keyword(s):  
Heart Rate ◽  
Metabolic Rate ◽  
Energy Cost ◽  
The Arctic ◽  
Arctic Fox ◽  
Alopex Lagopus ◽  
Energy Cost Of Running ◽  
Radio Transmitters ◽  
The Relationship ◽  
Determine Effect

This work was conducted to determine effect of season and starvation on metabolic rate during running in the Arctic Fox (Alopex lagopus) on Svalbard (78°55’N, 11°56’E), Norway. Indirect calorimetry was used to measure metabolic rate of foxes running on a treadmill and heart rate was monitored using implanted radio transmitters. The relationship between heart rate and metabolic rate was also examined. Metabolic rate increased with running speed. In July the metabolic rate during running almost fitted general equations predicted for mammals, while it was up to 20% lower in January, indicating seasonal variation in metabolic rate. There was a significant positive linear relationship between heart rate and weight specific metabolic rate, suggesting that heart rate can be used as an indicator of metabolic rate. Starvation for 11 days decreased the net cost of running by 13% in January and 17% in July, suggesting that a starved fox runs more energetically efficient than when fed. Heart rate measured in July decreased by 27% during starvation. Re-feeding reversed the starvation-induced reduction in metabolic rate and heart rate during running almost up to post-absorptive levels. The present results are from one fox, and must be considered as preliminary data until further studies are conducted.

Helminths of wolves, Canis lupus L., in the Yukon and Northwest Territories

1973 ◽  
Vol 51 (10) ◽  
pp. 1087-1091 ◽  
Author(s):  
L. P. E. Choquette ◽  
G. G. Gibson ◽  
E. Kuyt ◽  
A. M. Pearson
Keyword(s):  
Northwest Territories ◽  
Echinococcus Granulosus ◽  
Canis Lupus ◽  
Trichinella Spiralis ◽  
Gastrointestinal Helminths ◽  
Taenia Hydatigena ◽  
First Time ◽  
Toxascaris Leonina

Wolves from the Yukon and Northwest Territories harbored the following gastrointestinal helminths: Alaria americana (10 of 171), A. arisaemoides (2/171), Diphyllobothrium sp, (1/171). Mesocestoidcs kirbyi (3/171), Taenia hydatigena (54/111), T. krabbei (63/111), T. pisiformis (2/111), T. serialis (41/111), Echinococcus granulosus (24/171), Toxascaris leonina (83/171). Uncinaria stenocephala (11/171), Spirocerca arctica (1/171), and S. lupi (1/171). Larval Trichinella spiralis occurred in 72 of 153 diaphragms. A. arisaemoides, M. kirbyi, and S. arctica were found for the first time in Canis lupus, while S. lupi, S. arctica, and the prevalence of T. spiralis in wolves are reported for the first time in Canada.

scholarly journals Excavation of an Arctic Fox, Alopex lagopus, den by a Polar Bear, Ursus maritimus

2004 ◽  
Vol 118 (4) ◽  
pp. 602
Author(s):  
Evan S. Richardson ◽  
Ryan K. Brook
Keyword(s):  
National Park ◽  
Polar Bear ◽  
Ursus Maritimus ◽  
Hudson Bay ◽  
Arctic Fox ◽  
Alopex Lagopus ◽  
N 93

We observed a Polar Bear (Ursus maritimus) excavating an Arctic Fox (Alopex lagopus) den on 24 June 1998, 3 km inland from the Hudson Bay coast (58°40'N, 93°12'W), near Cape Churchill in Wapusk National Park, Manitoba. To our knowledge this is the first observed excavation of an Arctic Fox den by a Polar Bear.

Identification and morphology of the aecial state of Pucciniastrum sparsum in northwestern Canada

1970 ◽  
Vol 48 (3) ◽  
pp. 433-435
Author(s):  
Y. Hiratsuka
Keyword(s):  
North America ◽  
Northwest Territories ◽  
Picea Glauca ◽  
Yukon Territory ◽  
New Hosts ◽  
First Time

From inoculation experiments and morphological examinations, the aecial state of Pucciniastrum sparsum (Wint.) E. Fisch. (= Thekopsora sparsa (Wint.) Magn.) has been identified for the first time in North America from specimens collected in the Northwest Territories and the Yukon Territory. Picea glauca (Moench) Voss, P. mariana (Mill.) BSP., and P. pungens Engelm. (from inoculation only) are reported as new hosts of this fungus. An expanded description of the spermogonia and aecia of the fungus is given.

PARASITES OF THE ARCTIC FOX (ALOPEX LAGOPUS) IN ICELAND

1993 ◽  
Vol 29 (3) ◽  
pp. 440-446 ◽  
Author(s):  
K. Skirnisson ◽  
M. Eydal ◽  
E. Gunnarsson ◽  
P. Hersteinsson
Keyword(s):  
The Arctic ◽  
Arctic Fox ◽  
Alopex Lagopus
Sign in / Sign up

Export Citation Format

Share Document