Helminths of the arctic fox, Alopex lagopus (L.), in Greenland

1983 ◽  
Vol 61 (8) ◽  
pp. 1847-1851 ◽  
Author(s):  
R. L. Rausch ◽  
F. H. Fay ◽  
F. S. L. Williamson
Keyword(s):  
The Arctic ◽  
Western Coast ◽  
Intermediate Hosts ◽  
Alopex Lagopus ◽  
New Host ◽  
Host Interactions ◽  
Diphyllobothrium Dendriticum ◽  
Arctic Foxes ◽  
Plagiorchis Elegans ◽  
Toxascaris Leonina

Eight species of intestinal helminths were obtained from 38 arctic foxes, Alopex lagopus (L.), from two localities in Greenland (Thule Air Base and Søndre Strømfjord), viz., Echinoparyphium sp., 13%; Plagiorchis elegans (Rudolphi, 1802), 45%; Cryptocotyle concavum (Creplin, 1825), <3%; Diphyllobothrium dendriticum (Nitzsch, 1824), 10%; Taenia ovis krabbei Moniez, 1879, 13%; Mesocestoides lineatus (Goeze, 1782), 13%; Toxascaris leonina (von Linstow, 1902), 39%; and Uncinaria stenocephala (Railliet, 1884), <3%. New host and geographic records are reported. Cestodes for which rodents are obligatory intermediate hosts were not recorded, suggesting that the series of foxes was drawn from local populations inhabiting the western coast of Greenland. Helminth–host interactions are briefly discussed.

Effect of age and breeding season on sperm acrosin activity in the arctic fox (Alopex lagopus L.)

2014 ◽  
Vol 17 (1) ◽  
pp. 177-179 ◽  
Author(s):  
K. Stasiak ◽  
B. Janicki
Keyword(s):  
Breeding Season ◽  
The Arctic ◽  
Arctic Fox ◽  
Alopex Lagopus ◽  
A Value ◽  
Arctic Foxes ◽  
The Mean ◽  
One Year ◽  
Acrosin Activity ◽  
Effect Of Age

Abstract The objective of this study was to determine the effect of age and reproductive season on selected properties of semen from the arctic fox, Alopex lagopus L. The experiment used 40 ejaculates collected manually from 6 animals (3 foxes aged one year and 3 foxes older than three years). Statistically less semen (0.39 cm3) was collected from the young compared to the older animals, and the ejaculates obtained were characterized by higher concentration of spermatozoa (195.04 x 106/cm3). In turn, sperm acrosomal extracts from the older animals contained statistically more acrosin (6,4 mU/106 spermatozoa). In the sperm acrosomal extracts prepared during the first semen sampling, the mean acrosin activity did not exceed 2.3 mU/million spermatozoa. At subsequent semen sampling dates, the activity of the analysed enzyme increased to reach 7.72mU/million spermatozoa. In the extracts obtained from the semen collected at the end of the breeding season of arctic foxes, the acrosin activity again reached a value obtained at the beginning of the season.

Home-range sizes and altitude selection for arctic foxes and wolverines in an alpine environment

1998 ◽  
Vol 76 (3) ◽  
pp. 448-457 ◽  
Author(s):  
Arild Landa ◽  
Olav Strand ◽  
John DC Linnell ◽  
Terje Skogland
Keyword(s):  
The Arctic ◽  
Domestic Sheep ◽  
Home Ranges ◽  
Alopex Lagopus ◽  
Conservation Areas ◽  
Alpine Environment ◽  
South Central ◽  
Arctic Foxes ◽  
Selection For ◽  
Peripheral Areas

We compared the use of space and habitat by wolverines, Gulo gulo, and arctic foxes, Alopex lagopus, on the Snøhetta plateau and surrounding mountains in south-central Norway. The arctic foxes used smaller annual home ranges than the wolverines, whose home ranges were among the largest yet reported for the species. In both species, resident males used larger home ranges than resident females. Arctic foxes used a much narrower, and higher, range of altitudes than wolverines, always above the tree line. Wolverines used lower altitudes in winter than in summer. Female wolverines showed pronounced seasonal peaks in their use of the peripheral areas of their home ranges. Both species showed an ability to cross at least some transportation corridors (road, rail, human settlements) in the area. The habitat available at Snøhetta appears suitable for arctic foxes and does not explain the failure of the population to recover during 67 years of protection. Because of predation on domestic sheep, wolverines will probably be confined to a series of core conservation areas (CCA). At present densities (0.28-0.36 wolverines per 100 km2), the CCA surrounding Snøhetta can contain from 36 to 50 wolverines.

Den use by arctic foxes (Alopex lagopus) in a subarctic region of western Alaska

1996 ◽  
Vol 74 (4) ◽  
pp. 627-631 ◽  
Author(s):  
R. Michael Anthony
Keyword(s):  
Vulpes Vulpes ◽  
The Arctic ◽  
Arctic Fox ◽  
Alopex Lagopus ◽  
Red Foxes ◽  
Subarctic Region ◽  
Arctic Circle ◽  
Aerial Surveys ◽  
Arctic Foxes ◽  
Den Use

Distribution, abundance, and use of arctic fox dens located in coastal tundra communities of the Yukon–Kuskokwim delta were determined in studies from 1985 to 1990. Dens were denser and less complex than those described in studies conducted above the Arctic Circle. Eighty-three dens of varying complexity were found in the 52-km2 study area. Nineteen dens were used by arctic foxes for whelping or rearing pups. Three females relocated litters to multiple dens; a maximum of four dens were used concurrently by pups from one litter. Although red foxes (Vulpes vulpes) were common in the region, their use of dens in the study area was minimal. Differences in vegetation at den sites and nearby unoccupied sites were minimal. Furthermore, den sites could not be distinguished from non-den sites during aerial surveys.

Evironmental threats to marine mammals in the Canadian Arctic

Polar Record ◽  
1983 ◽  
Vol 21 (134) ◽  
pp. 433-449 ◽  
Author(s):  
Ian Stirling ◽  
Wendy Calvert
Keyword(s):  
Sea Ice ◽  
Arctic Ocean ◽  
Marine Mammals ◽  
Canadian Arctic ◽  
Ursus Maritimus ◽  
The Arctic ◽  
Polar Bears ◽  
Alopex Lagopus ◽  
Arctic Foxes ◽  
The Arctic Ocean

The Arctic Ocean is the home of three major groups of mammals that depend on the sea for survival and show varying degrees of adaptation for maritime life. Most fully adapted are the whales (Cetacea), which never leave the water, and the seals and walruses (Pinnipedia) that feed entirely at sea but emerge onto land or ice for pupping and basking. Less exclusively marine are two species of the order Carnivora—Polar Bears (Ursus maritimus), that seldom live far from the sea because they feed almost entirely upon seals, and Arctic Foxes (Alopex lagopus), some of which move out onto the sea ice during the winter, mainly to scavenge on the remains of seals killed by Polar Bears.

Annual, seasonal, and habitat-related variation in feeding habits of the arctic fox (Alopex lagopus) on St. Lawrence Island, Bering Sea

1989 ◽  
Vol 67 (8) ◽  
pp. 1986-1994 ◽  
Author(s):  
Francis H. Fay ◽  
Robert O. Stephenson
Keyword(s):  
Feeding Habits ◽  
Stomach Contents ◽  
Early Spring ◽  
The Arctic ◽  
Alopex Lagopus ◽  
Live Prey ◽  
Annual Variations ◽  
Arctic Foxes ◽  
Bird Colonies ◽  
Previous Summer

Small rodents, especially northern voles (Microtus oeconomus), were the most frequently occurring prey in the stomach contents and scats of arctic foxes collected on St. Lawrence Island between 1955 and 1970. Annual variations in the winter occurrence of voles in the stomach contents correlated well with variations in population density of the voles in the previous summer. However, when the foxes' summer dens were in or near large marine bird colonies, birds predominated in the diet. Even in winter, birds tended to occur more frequently in the diet of foxes trapped on bird cliffs than on the tundra. Since the birds are absent from the cliffs in winter, these evidently were from cached supplies. In terms of biomass, birds were of equal or greater importance than voles in the overall diet, and marine mammal carrion became most important in winter and early spring, when live prey were scarce. Although populations of live prey were abundant and readily accessible in summer, they were absent or inaccessible in winter; hence, even in this area of abundance, storage of food was essential for survival of foxes through the cold months.

Fat indices of arctic foxes Alopex lagopus in Svalbard

2003 ◽  
Vol 9 (1) ◽  
pp. 193-197 ◽  
Author(s):  
Pål Prestrud ◽  
Caroline M. Pond
Keyword(s):  
Alopex Lagopus ◽  
Arctic Foxes

IMMUNIZATION OF ARCTIC FOXES (ALOPEX LAGOPUS) WITH ORAL RABIES VACCINE

1988 ◽  
Vol 24 (3) ◽  
pp. 477-483 ◽  
Author(s):  
Erich H. Follmann ◽  
Donald G. Ritter ◽  
George M. Baer
Keyword(s):  
Rabies Vaccine ◽  
Alopex Lagopus ◽  
Arctic Foxes ◽  
Oral Rabies Vaccine

scholarly journals Do parasites adopt different strategies in different intermediate hosts? Host size, not host species, influences Coitocaecum parvum (Trematoda) life history strategy, size and egg production

Parasitology ◽  
2012 ◽  
Vol 140 (2) ◽  
pp. 275-283 ◽  
Author(s):  
R. RUIZ DANIELS ◽  
S. BELTRAN ◽  
R. POULIN ◽  
C. LAGRUE
Keyword(s):  
Host Species ◽  
Egg Production ◽  
Life History Strategy ◽  
Host Size ◽  
Life Strategy ◽  
Amphipod Species ◽  
Intermediate Hosts ◽  
Host Interactions ◽  
Resource Limitations ◽  
Coitocaecum Parvum

SUMMARYHost exploitation induces host defence responses and competition between parasites, resulting in individual parasites facing highly variable environments. Alternative life strategies may thus be expressed in context-dependent ways, depending on which host species is used and intra-host competition between parasites. Coitocaecum parvum (Trematode) can use facultative progenesis in amphipod intermediate hosts, Paracalliope fluviatilis, to abbreviate its life cycle in response to such environmental factors. Coitocaecum parvum also uses another amphipod host, Paracorophium excavatum, a species widely different in size and ecology from P. fluviatilis. In this study, parasite infection levels and strategies in the two amphipod species were compared to determine whether the adoption of progenesis by C. parvum varied between these two hosts. Potential differences in size and/or egg production between C. parvum individuals according to amphipod host species were also investigated. Results show that C. parvum life strategy was not influenced by host species. In contrast, host size significantly affected C. parvum strategy, size and egg production. Since intra-host interactions between co-infecting parasites also influenced C. parvum strategy, size and fecundity, it is highly likely that within-host resource limitations affect C. parvum life strategy and overall fitness regardless of host species.

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