ArticlePloS one2018
Diversity of gastrointestinal helminths in Dall's sheep and the negative association of the abomasal nematode, Marshallagia marshalli, with fitness indicators.
Article in PloS one, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers, 1 of them a synthesis that pooled it.
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Who cites it
13 citing papers in PubMed, 1 synthesis or guideline pooled it, 23 citations in OpenAlex.
- Sublethal effects of parasitism on ruminants can have cascading consequences for ecosystems.Proceedings of the National Academy of Sciences of the United States of America · 2022Pooled it
- A Pain in the Butt: The Association Between Endo-Parasite Diversity and Horn Growth in Rocky Mountain Bighorn Sheep.Pathogens (Basel, Switzerland) · 2025Article
- Effects of forest structure on the endoparasitism in roe deer Capreolus capreolus.Parasite (Paris, France) · 2025Article
- Essential mineral elements in roe deer: Associations with parasites and immune phenotypes in two contrasting populations.Ecology and evolution · 2024Article
- Patterns of gastrointestinal parasite infections in bighorn sheep,International journal for parasitology. Parasites and wildlife · 2024Article
- Direct and indirect costs of parasitism preceding a population decline of an Arctic ungulate.Scientific reports · 2024Article
- Prevalences and Characteristics ofJournal of veterinary research · 2022Article
- Metabarcoding in two isolated populations of wild roe deer (Capreolus capreolus) reveals variation in gastrointestinal nematode community composition between regions and among age classes.Parasites & vectors · 2021Article
- Trichostrongyloid nematodes in ruminants of northern Iran: prevalence and molecular analysis.BMC veterinary research · 2021Article
- Forecasting parasite sharing under climate change.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2021Article
- Reproductive females and young mouflon (Parasitology · 2021Article
- Parasite intensity drives fetal development and sex allocation in a wild ungulate.Scientific reports · 2020Article
- Both candidate gene and neutral genetic diversity correlate with parasite resistance in female Mediterranean mouflon.BMC ecology · 2019Article
Corrections and comments
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Authors and funding
6 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Gastrointestinal helminths can have a detrimental effect on the fitness of wild ungulates. Arctic and Subarctic ecosystems are ideal for the study of host-parasite interactions due to the comparatively simple ecological interactions and limited confounding factors. We used a unique dataset assembled in the early seventies to study the diversity of gastrointestinal helminths and their effect on fitness indicators of Dall's sheep, Ovis dalli dalli, in the Mackenzie Mountains, Northwest Territories, Canada. Parasite diversity included nine species, among which the abomasal nematode Marshallagia marshalli occurred with the highest prevalence and infection intensity. The intensity of M. marshalli increased with age and was negatively associated with body condition and pregnancy status in Dall's sheep across all the analyses performed. The intensity of the intestinal whipworm, Trichuris schumakovitschi, decreased with age. No other parasites were significantly associated with age, body condition, or pregnancy. Our study suggests that M. marshalli might negatively influence fitness of adult female Dall's sheep.
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