393 results match your criteria arctic foxes


Digging into the behaviour of an active hunting predator: arctic fox prey caching events revealed by accelerometry.

Mov Ecol 2021 Nov 27;9(1):58. Epub 2021 Nov 27.

Canada Research Chair On Northern Biodiversity, Université du Québec À Rimouski, 300 Allée des Ursulines, Rimouski, QC, G5L 3A1, Canada.

Background: Biologging now allows detailed recording of animal movement, thus informing behavioural ecology in ways unthinkable just a few years ago. In particular, combining GPS and accelerometry allows spatially explicit tracking of various behaviours, including predation events in large terrestrial mammalian predators. Specifically, identification of location clusters resulting from prey handling allows efficient location of killing events. Read More

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November 2021

Evidence of Arctic Fox Survival following Exposure to Rabies Virus.

J Wildl Dis 2021 Nov 23. Epub 2021 Nov 23.

US Department of Agriculture, National Wildlife Research Center, 4101 Laporte Avenue, Fort Collins, Colorado 80521, USA.

The arctic fox variant of the rabies virus (RABV) is enzootic in the circumpolar north. Reports of abortive RABV exposures motivated a retrospective analysis of sera from 41 arctic foxes captured at Karrak Lake in Nunavut, Canada, during 2011-2015. Estimated RABV antibody prevalence among foxes was 14% (95% confidence interval, 7-28%). Read More

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November 2021

Spermatozoon head size - the main differentiating feature between spermatozoa of blue and white Arctic fox (Vulpes lagopus).

Anim Reprod 2021 22;18(3):e20210015. Epub 2021 Oct 22.

Faculty of Animal Breeding and Biology, Bydgoszcz University of Science and Technology, Mazowiecka, Bydgoszcz, Poland.

Morphology and sperm morphometry, this is an important determinant of male reproductive capacity. Morphometric data may provide relevant information in studies focused on evolutionary biology, sperm quality assessment, including prediction of the potential fertility, semen cryopreservation, or the effect of reprotoxicants. The paper presents the morphometric analysis of spermatozoa from two colour morphs of Arctic fox (Vulpes lagopus), and attempts to determine the relationship between selected quality indicators and dimensions and shape of spermatozoa. Read More

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October 2021

Genetic structure of immunologically associated candidate genes suggests arctic rabies variants exert differential selection in arctic fox populations.

PLoS One 2021 29;16(10):e0258975. Epub 2021 Oct 29.

Environmental and Life Sciences Graduate Program, Trent University, Peterborough, ON, Canada.

Patterns of local adaptation can emerge in response to the selective pressures diseases exert on host populations as reflected in increased frequencies of respective, advantageous genotypes. Elucidating patterns of local adaptation enhance our understanding of mechanisms of disease spread and the capacity for species to adapt in context of rapidly changing environments such as the Arctic. Arctic rabies is a lethal disease that largely persists in northern climates and overlaps with the distribution of its natural host, arctic fox. Read More

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October 2021

Comparative transcriptome provides insights into the selection adaptation between wild and farmed foxes.

Ecol Evol 2021 Oct 30;11(19):13475-13486. Epub 2021 Aug 30.

College of Life Science Qufu Normal University Qufu China.

The silver fox and blue fox are economically important fur species and were domesticated by humans from their wild counterparts, the arctic fox and red fox, respectively. Farmed foxes show obvious differences from their wild counterparts, including differences in physiology, body size, energy metabolism, and immunity. However, the molecular mechanisms underlying these differences are presently unclear. Read More

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October 2021

Fur colour in the Arctic fox: genetic architecture and consequences for fitness.

Proc Biol Sci 2021 Sep 29;288(1959):20211452. Epub 2021 Sep 29.

Centre for Biodiversity Dynamics (CBD), Department of Biology, Norwegian University of Science and Technology (NTNU), Trondheim 7491, Norway.

Genome-wide association studies provide good opportunities for studying the genetic basis of adaptive traits in wild populations. Yet, previous studies often failed to identify major effect genes. In this study, we used high-density single nucleotide polymorphism and individual fitness data from a wild non-model species. Read More

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September 2021

Genetic changes and evolutionary analysis of canine circovirus.

Arch Virol 2021 Aug 8;166(8):2235-2247. Epub 2021 Jun 8.

College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China.

Canine circovirus (canineCV) has been found to be associated with vasculitis, hemorrhage, hemorrhagic enteritis, and diarrhea of canines. CanineCV, like other circoviruses, may also be associated with lymphoid depletion and immunosuppression. This circovirus has been detected worldwide in different countries and species. Read More

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Ecology of Arctic rabies: 60 years of disease surveillance in the warming climate of northern Canada.

Zoonoses Public Health 2021 09 13;68(6):601-608. Epub 2021 May 13.

Groupe de Recherche en Épidémiologie des Zoonoses et Santé Publique, Faculté de Médecine Vétérinaire, Université de Montréal, Saint-Hyacinthe, QC, Canada.

Rabies occurs throughout the Arctic, representing an ongoing public health concern for residents of northern communities. The Arctic fox (Vulpes lagopus) is the main reservoir of the Arctic rabies virus variant, yet little is known about the epidemiology of Arctic rabies, such as the ecological mechanisms driving where and when epizootics in fox populations occur. In this study, we provide the first portrait of the spatio-temporal spread of rabies across northern Canada. Read More

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September 2021

Genomic and fitness consequences of inbreeding in an endangered carnivore.

Mol Ecol 2021 06 20;30(12):2790-2799. Epub 2021 May 20.

Department of Zoology, Stockholm University, Stockholm, Sweden.

Reduced fitness through genetic drift and inbreeding is a major threat to small and isolated populations. Although previous studies have generally used genetically verified pedigrees to document effects of inbreeding and gene flow, these often fail to capture the whole inbreeding history of the species. By assembling a draft arctic fox (Vulpes lagopus) genome and resequencing complete genomes of 23 additional foxes born before and after a well-documented immigration event in Scandinavia, we here look into the genomic consequences of inbreeding and genetic rescue. Read More

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Unravelling the genetic diversity and relatedness of Echinococcus multilocularis isolates in Eurasia using the EmsB microsatellite nuclear marker.

Infect Genet Evol 2021 08 20;92:104863. Epub 2021 Apr 20.

Wildlife Surveillance and Eco-Epidemiology Unit, National Reference Laboratory for Echinococcus spp., Anses LRFSN, 54220 Malzéville, France.

The cestode Echinococcus multilocularis is the causative agent of alveolar echinococcosis, a severe helminthic zoonotic disease distributed in the Northern Hemisphere. The lifecycle of the parasite is mainly sylvatic, involving canid and rodent hosts. The absence of genetic data from most eastern European countries is a major knowledge gap, affecting the study of associations with parasite populations in Western Europe. Read More

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The role of a mechanistic host in maintaining arctic rabies variant distributions: Assessment of functional genetic diversity in Alaskan red fox (Vulpes vulpes).

PLoS One 2021 8;16(4):e0249176. Epub 2021 Apr 8.

Environmental and Life Sciences Graduate Program, Trent University, Peterborough, Ontario, Canada.

Populations are exposed to different types and strains of pathogens across heterogeneous landscapes, where local interactions between host and pathogen may present reciprocal selective forces leading to correlated patterns of spatial genetic structure. Understanding these coevolutionary patterns provides insight into mechanisms of disease spread and maintenance. Arctic rabies (AR) is a lethal disease with viral variants that occupy distinct geographic distributions across North America and Europe. Read More

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September 2021

Chromosome-level genome assembly of the Arctic fox (Vulpes lagopus) using PacBio sequencing and Hi-C technology.

Mol Ecol Resour 2021 Aug 21;21(6):2093-2108. Epub 2021 Apr 21.

Hebei Key Laboratory of Specialty Animal Germplasm Resources Exploration and Innovation (Under Planning), College of Animal Science and Technology, Hebei Normal University of Science and Technology, Qinhuangdao, China.

The Arctic fox (Vulpes lagopus) is the only fox species occurring in the Arctic and has adapted to its extreme climatic conditions. Currently, the molecular basis of its adaptation to the extreme climate has not been characterized. Here, we applied PacBio sequencing and chromosome structure capture technique to assemble the first V. Read More

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Extensive daily movement rates measured in territorial arctic foxes.

Ecol Evol 2021 Mar 26;11(6):2503-2514. Epub 2021 Jan 26.

Canada Research Chair on Northern Biodiversity and Center for Northern Studies Université du Québec à Rimouski Rimouski QC Canada.

An animal's movement rate is a central metric of movement ecology as it correlates with its energy acquisition and expenditure. Obtaining accurate estimates of movement rate is challenging, especially in small highly mobile species where GPS battery size limits fix frequency, and geolocation technology limits positions' precision. In this study, we used high GPS fix frequencies to evaluate movement rates in eight territorial arctic foxes on Bylot Island (Nunavut, Canada) in July-August 2018. Read More

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Prey and habitat distribution are not enough to explain predator habitat selection: addressing intraspecific interactions, behavioural state and time.

Mov Ecol 2021 Mar 20;9(1):12. Epub 2021 Mar 20.

Chaire de recherche du Canada en biodiversité nordique and Centre d'Études Nordiques, Université du Québec à Rimouski, 300 Allée des Ursulines, Rimouski, Québec, G5L 3A1, Canada.

Background: Movements and habitat selection of predators shape ecological communities by determining the spatiotemporal distribution of predation risk. Although intraspecific interactions associated to territoriality and parental care are involved in predator habitat selection, few studies have addressed their effects simultaneously with those of prey and habitat distribution. Moreover, individuals require behavioural and temporal flexibility in their movement decisions to meet various motivations in a heterogeneous environment. Read More

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Low Persistence of Genetic Rescue Across Generations in the Arctic Fox (Vulpes lagopus).

J Hered 2021 05;112(3):276-285

Department of Zoology, Stockholm University, Stockholm, Sweden.

Genetic rescue can facilitate the recovery of small and isolated populations suffering from inbreeding depression. Long-term effects are however complex, and examples spanning over multiple generations under natural conditions are scarce. The aim of this study was to test for long-term effects of natural genetic rescue in a small population of Scandinavian Arctic foxes (Vulpes lagopus). Read More

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Fitness and fur colouration: Testing the camouflage and thermoregulation hypotheses in an Arctic mammal.

J Anim Ecol 2021 05 17;90(5):1328-1340. Epub 2021 Mar 17.

Norwegian Institute for Nature Research (NINA), Bergen, Norway.

Selection for crypsis has been recognized as an important ecological driver of animal colouration, whereas the relative importance of thermoregulation is more contentious with mixed empirical support. A potential thermal advantage of darker individuals has been observed in a wide range of animal species. Arctic animals that exhibit colour polymorphisms and undergo seasonal colour moults are interesting study subjects for testing the two alternative hypotheses: demographic performance of different colour morphs might be differentially affected by snow cover with a cryptic advantage for lighter morphs, or conversely by winter temperature with a thermal advantage for darker morphs. Read More

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Relationships between fox populations and rabies virus spread in northern Canada.

PLoS One 2021 16;16(2):e0246508. Epub 2021 Feb 16.

Biology Department, Memorial University of Newfoundland, St. John's, Newfoundland & Labrador, Canada.

Rabies spreads in both Arctic (Vulpes lagopus) and red foxes (Vulpes vulpes) throughout the Canadian Arctic but limited wildlife disease surveillance, due to the extensive landmass of the Canadian north and its small widely scattered human population, undermines our knowledge of disease transmission patterns. This study has explored genetic population structure in both the rabies virus and its fox hosts to better understand factors that impact rabies spread. Phylogenetic analysis of 278 samples of the Arctic lineage of rabies virus recovered over 40 years identified four sub-lineages, A1 to A4. Read More

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Foxes fertilize the subarctic forest and modify vegetation through denning.

Sci Rep 2021 02 4;11(1):3031. Epub 2021 Feb 4.

Department of Biological Sciences, University of Manitoba, 212B Biological Sciences Building, Winnipeg, MB, R3T 2N2, Canada.

Ecosystem engineers modify habitats through processes other than trophic interactions, such as by regulating soil nutrients, and can influence resource availability and quality for other organisms. Predator-mediated elemental cycling may be especially important in determining plant diversity and growth in ecosystems where soil fertility and primary productivity are low. Red foxes (Vulpes vulpes L. Read More

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February 2021

PREVALENCE OF THE 1-1Δ GENE IN NONDOMESTIC SPECIES OF THE FAMILY.

J Zoo Wildl Med 2021 Jan;51(4):1007-1011

Program in Individualized Medicine College of Veterinary Medicine Washington State University, Pullman, WA 99164, USA.

The 1 gene is responsible for encoding the P-glycoprotein (P-gp) efflux transporter that prevents accumulation of exogenous substances in the body by utilizing ATP hydrolysis to transport these substances against their concentration gradient. In dogs, homozygous or heterozygous mutations for the previously described 1-1Δ mutation lead to ineffective P-gp efflux transport function and puts the animal at risk for potentially devastating adverse drug effects. The purpose of this study was to evaluate 1-1Δ gene mutation status in species belonging to the family, including each of the following: maned wolf (), gray wolf (), red wolf (), coyote (), dingo (), New Guinea singing dog (), arctic fox (), and fennec fox (). Read More

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January 2021

Recent epidemiologic and clinical Toxoplasma gondii infections in wild canids and other carnivores: 2009-2020.

Vet Parasitol 2021 Feb 17;290:109337. Epub 2020 Dec 17.

United States Department of Agriculture, Agricultural Research Service, Beltsville Agricultural Research Center, Animal Parasitic Diseases Laboratory, Building 1001, Beltsville, MD, 20705-2350, USA.

Toxoplasma gondii infections are common in humans and animals worldwide. The present review summarizes worldwide information on the prevalence of clinical and subclinical infections, epidemiology, diagnosis, and genetic diversity of T. gondii in wild canids and other carnivores for the past decade. Read More

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February 2021

Severe asynapsis in spermatocytes of interspecific hybrids of the silver fox (Vulpes vulpes) and the blue fox (Alopex lagopus) leads to pachytene I arrest as a result of sustained H2AXγ phosphorylation.

Theriogenology 2021 Mar 25;162:1-5. Epub 2020 Dec 25.

Department of Biological Basis of Animal Production, University of Life Sciences in Lublin, Akademicka 13, 20-950, Lublin, Poland.

Infertility is frequently associated with meiotic anomalies which can result in the production of chromosomally abnormal gametes or be concomitant with meiotic arrest. We investigated whether spermatocytes of male interspecific hybrids of the red fox (Vulpes vulpes) and the arctic fox (Alopex lagopus) presented alterations in chromosomal synapses and meiotic checkpoint signalling. Using the immunofluorescence technique with SP1 and SP3 proteins, bivalent structures and their deviations (multivalents, univalents and not fully conjugated bivalents) were analyzed on meiotic preparations. Read More

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Arctic meltdown.

Authors:
Michael Gross

Curr Biol 2020 12;30(23):R1391-R1393

Michael Gross is a science writer based at Oxford. He can be contacted via his web page at www.michaelgross.co.uk.

After a year-long expedition into the Arctic ice, the research vessel Polarstern returns with further evidence of the decline of the northern ice cap. Recent weather extremes including the unprecedented heat wave in Siberia contribute to the decline that is bound to show catastrophic consequences very soon. Michael Gross reports. Read More

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December 2020

Genetic polymorphism under cyclical selection in long-lived species: The complex effect of age structure and maternal selection.

J Theor Biol 2021 03 5;512:110564. Epub 2021 Jan 5.

Institute for Complex Analysis of Regional Problem, Far Eastern Branch, Russian Academy of Sciences, Birobidzhan 679016, Russia. Electronic address:

Maternal selection and overlapping generations can facilitate the stable coexistence of alleles under temporally fluctuating environment. Using mathematical models, we considered the complex effect of both factors on the maintenance of genetic polymorphism in cyclically changing environments. We concentrated on asymmetric cyclic selection, which allows describing fluctuations of environments by analogy of food resources cycles with rare peaks and prolonged decline of prey abundance. Read More

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Prioritisation of areas for early detection of southward movement of arctic fox rabies based on historical surveillance data in Quebec, Canada.

Epidemiol Infect 2020 12 17;149:e20. Epub 2020 Dec 17.

Department of Geography, Queen's University, Kingston, Canada.

Arctic rabies virus variant (ARVV) is enzootic in Quebec (Canada) north of the 55th parallel. With climate change, increased risk of re-incursion of ARVV in more densely populated southern regions raises public and animal health concerns. The objective of this study was to prioritise geographical areas to target for an early detection of ARVV incursion south of the 55th parallel based on the historical spatio-temporal trends of reported rabies in foxes in Quebec. Read More

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December 2020

and T6 in arctic foxes ( from northern Canada.

Int J Parasitol Parasites Wildl 2020 Dec 28;13:269-274. Epub 2020 Nov 28.

Department of Veterinary Microbiology, Western College of Veterinary Medicine, 52 Campus Drive, Saskatoon, SK, S7N 5B4, Canada.

Parasitic zoonotic nematodes of the genus circulate in wildlife and domestic hosts worldwide through the ingestion of infected meat. Due to their role as scavengers and predators in terrestrial and marine arctic ecosystems, Arctic foxes () are ideal sentinels for the detection of spp. In this study, we determined the prevalence, larval intensity, and species of from 91 trapped Arctic foxes collected around the northern Canadian communities of Sachs Harbour (Ikaahuk) on Banks Island (n = 23), and Ulukhaktok and Cambridge Bay (Ikaluktutiak) on Victoria Island (n = 68). Read More

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December 2020

Molecular characteristics of H9N2 influenza viruses isolated from farmed raccoon dogs and arctic foxes in China.

Res Vet Sci 2021 Mar 14;135:542-546. Epub 2020 Nov 14.

Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, Taian, Shandong Province, 271018, China; College of Veterinary Medicine, Shandong Agricultural University, Taian, Shandong Province 271018, China; Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, Taian, Shandong Province 271018, China. Electronic address:

In this study, eight H9N2 IAVs were isolated from infected diseased, farmed raccoon dogs and arctic foxes. Eight genes shared 98.6%-100% identity among the isolates possessing a PSRSSR/GL motif at the HA cleavage site, which is same as the motif of G1 and Y280 lineages of H9N2 IAVs. Read More

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Inuit knowledge of Arctic Terns (Sterna paradisaea) and perspectives on declining abundance in southeastern Hudson Bay, Canada.

PLoS One 2020 17;15(11):e0242193. Epub 2020 Nov 17.

Nunavik Marine Region Wildlife Board, Inukjuak, Québec, Canada.

The Arctic Tern (Sterna paradisaea; takatakiaq in Inuttitut) breeds in the circumpolar Arctic and undertakes the longest known annual migration. In recent decades, Arctic Tern populations have been declining in some parts of their range, and this has been a cause of concern for both wildlife managers and Indigenous harvesters. However, limited scientific information is available on Arctic Tern abundance and distribution, especially within its breeding range in remote areas of the circumpolar Arctic. Read More

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January 2021

Broad Range Screening of Vector-Borne Pathogens in Arctic Foxes () in Iceland.

Animals (Basel) 2020 Nov 4;10(11). Epub 2020 Nov 4.

Department of Wildlife Diseases, Leibniz Institute for Zoo and Wildlife Research, 10315 Berlin, Germany.

The arctic fox () is the only native terrestrial mammal in Iceland. While red foxes () are known to be epidemiologically important carriers of several vector-borne pathogens in Europe, arctic foxes have never been evaluated in a similar context on this continent. This has become especially relevant in the last decade, considering the establishing populations of the tick species in Iceland. Read More

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November 2020

The Prevalence of spp. in Two Arctic Fox () Farms in Poland.

Animals (Basel) 2020 Sep 18;10(9). Epub 2020 Sep 18.

Department of Epizootiology, Faculty of Veterinary Medicine, University of Warmia and Mazury in Olsztyn, Oczapowskiego 13, 10-718 Olsztyn, Poland.

The objective of the study was to determine the occurrence of spp. infections in two Arctic fox () farms in Poland, and to analyse the correlations between animals that tested positive for spp and breeding results. Faecal samples were taken from 1094 clinically healthy blue foxes from the basic stock of farms A and B. Read More

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September 2020

Hopping species and borders: detection of Bartonella spp. in avian nest fleas and arctic foxes from Nunavut, Canada.

Parasit Vectors 2020 Sep 14;13(1):469. Epub 2020 Sep 14.

Department of Veterinary Microbiology, Western College of Veterinary Medicine, University of Saskatchewan, 52 Campus Drive, Saskatoon, SK, S7N 5B4, Canada.

Background: In a warmer and more globally connected Arctic, vector-borne pathogens of zoonotic importance may be increasing in prevalence in native wildlife. Recently, Bartonella henselae, the causative agent of cat scratch fever, was detected in blood collected from arctic foxes (Vulpes lagopus) that were captured and released in the large goose colony at Karrak Lake, Nunavut, Canada. This bacterium is generally associated with cats and cat fleas, which are absent from Arctic ecosystems. Read More

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September 2020