0000000001319136

AUTHOR

Bjørnar Ytrehus

showing 4 related works from this author

Prevalence of Borrelia burgdorferi in Ixodes ricinus ticks collected from moose (Alces alces) and roe deer (Capreolus capreolus) in southern Norway

2010

As part of a larger survey, ears from 18 roe deer (Capreolus capreolus) and 52 moose (Alces alces) shot in the 2 southernmost counties in Norway were collected and examined for Ixodes ricinus ticks. Seventy-two adult ticks, 595 nymphs, and 267 larvae from the roe deer, and 182 adult ticks, 433 nymphs, and 70 larvae from the moose were investigated for infection with Borrelia burgdorferi sensu lato (s.l.). The results showed the presence of B. burgdorferi s.l. DNA in 2.9% of the nymphs collected from roe deer and in 4.4% of the nymphs and 6.0% of the adults collected from moose. The spirochetes were not detected in adult ticks from roe deer, or in larvae feeding on roe deer or moose. In comp…

LarvaIxodes ricinusIxodesbiologyNorwayDeeranimal diseasesRicinusZoologybacterial infections and mycosesbiology.organism_classificationMicrobiologyRoe deerInfectious DiseasesCapreolusBorrelia burgdorferi GroupInsect Sciencebiology.animalparasitic diseasesLower prevalenceAnimalsArachnid VectorsParasitologyBorrelia burgdorferiNymphTicks and Tick-borne Diseases
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Fremmede arter i Norge: resultater fra kvantitative økologiske risikovurderinger

2020

1. Due to globalisation, trade and transport, the spread of alien species is increasing dramatically. Some alien species become ecologically harmful by threatening native biota. This can lead to irreversible changes in local biodiversity and ecosystem functioning, and, ultimately, to biotic homogenisation. 2. We risk-assessed all alien plants, animals, fungi and algae, within certain delimitations, that are known to reproduce in Norway. Mainland Norway and the Arctic archipelago of Svalbard plus Jan Mayen were treated as separate assessment areas. Assessments followed the Generic Ecological Impact Assessment of Alien Species (GEIAA) protocol, which uses a fully quantitative set of criteria.…

:Ecology: 488 [VDP]VDP::Matematikk og naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økologi: 488Invasjonsbiologi / Invasion biologyecological impactinvasion potentialgenetic contaminationInvasive speciesevidence‐based managementinvasive speciesevidence-based managementInvasjonsbiologiGenetic contaminationGE1-350ecological effectAlien speciesQH540-549.5VDP::Mathematics and natural scienses: 400::Zoology and botany: 480::Ecology: 488EcologyImpact assessmentEcologyVDP::Økologi: 488Evidence-based managementVDP::Ecology: 488quantitative impact assessmentPeer reviewEnvironmental sciencesGeographydoor‐knocker speciesdoor-knocker species:Økologi: 488 [VDP]Invasion biology
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BORRELIA BURGDORFERI SENSU LATO DETECTED IN SKIN OF NORWEGIAN MOUNTAIN HARES (LEPUS TIMIDUS) WITHOUT SIGNS OF DISSEMINATION

2011

The mountain hare (Lepus timidus) population in southern Norway appears to be in decline. Necropsy and laboratory examinations of 36 hares found dead or diseased during 2007-2009 in Vest- and Aust-Agder counties showed that disease and deaths were attributed to multiple causes, with no specific etiology emerging as a cause for population decline. To investigate whether Borrelia burgdorferi sensu lato (s.l.) infection is associated with mortality in mountain hares, tissues and ticks collected from hares were investigated for infection with the spirochete. Borrelia burgdorferi s.l. DNA was not detected in samples from internal organs, whereas Borrelia afzelii, B. burgdorferi sensu stricto (s.…

DNA BacterialMaleConservation of Natural ResourcesIxodes ricinusanimal diseasesPopulationAnimals WildBorrelia afzeliimedicine.disease_causeMicrobiologyTicksBorrelia burgdorferi GroupSensuBorreliaparasitic diseasesmedicineAnimalsBorrelia burgdorferieducationEcology Evolution Behavior and SystematicsSkinLyme Diseaseeducation.field_of_studyEcologybiologyNorwayBorreliaHaresbacterial infections and mycosesbiology.organism_classificationPopulation declineFemaleLepus timidusJournal of Wildlife Diseases
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Data from: Ecological impact assessments of alien species in Norway

2020

Due to globalisation, trade and transport, the spread of alien species is increasing dramatically. Some alien species become ecologically harmful by threatening native biota. This can lead to irreversible changes in local biodiversity and ecosystem functioning, and, ultimately, to biotic homogenisation. We risk-assessed all alien plants, animals, fungi and algae, within certain delimitations, that are known to reproduce in Norway. Mainland Norway and the Arctic archipelago of Svalbard plus Jan Mayen were treated as separate assessment areas. Assessments followed the Generic Ecological Impact Assessment of Alien Species (GEIAA) protocol, which uses a fully quantitative set of criteria. A tot…

SvalbardInvasion potentialNorwayarea of occupancyecological impactintroduction pathwayalien speciesecological effectgenetic contaminationquantitative impact assessmentdoor-knocker speciesJan Mayen
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