Climate influences assemblages of abomasal nematodes of sheep on steppe pastures in the east of Algeria

Zouyed, Ilhem; Cabaret, Jacques; Bentounsi, B.

doi:10.1017/s0022149x16000845

Cited by 5 publications

(4 citation statements)

References 14 publications

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“…We found that high levels of moisture (F) were associated with lower parasite burdens. While contrary to our expectations—rainfall has been found to favour strongyle larval survival (Zouyed et al, 2016 )—moisture may not be limiting strongyle survival on St. Kilda due to its hyper‐oceanic climate. That F and PC1 explain largely the same variance in our models could be due to them both being similarly correlated to a causal factor driving FEC burdens.…”

Section: Discussioncontrasting

confidence: 99%

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Age‐specific impacts of vegetation functional traits on gastrointestinal nematode parasite burdens in a large herbivore

Wiersma

Pakeman

Bal

et al. 2023

Journal of Animal Ecology

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Gastrointestinal nematode (GIN) parasites play an important role in the ecological dynamics of many animal populations. Recent studies suggest that fine‐scale spatial variation in GIN infection dynamics is important in wildlife systems, but the environmental drivers underlying this variation remain poorly understood. We used data from over two decades of GIN parasite egg counts, host space use, and spatial vegetation data from a long‐term study of Soay sheep on St Kilda to test how spatial autocorrelation and vegetation in an individual's home range predict parasite burden across three age groups. We developed a novel approach to quantify the plant functional traits present in a home range to describe the quality of vegetation present. Effects of vegetation and space varied between age classes. In immature lambs, strongyle parasite faecal egg counts (FEC) were spatially structured, being highest in the north and south of our study area. Independent of host body weight and spatial autocorrelation, plant functional traits predicted parasite egg counts. Higher egg counts were associated with more digestible and preferred plant functional traits, suggesting the association could be driven by host density and habitat preference. In contrast, we found no evidence that parasite FEC were related to plant functional traits in the host home range in yearlings or adult sheep. Adult FEC were spatially structured, with highest burdens in the north‐east of our study area, while yearling FEC showed no evidence of spatial structuring. Parasite burdens in immature individuals appear more readily influenced by fine‐scale spatial variation in the environment, highlighting the importance of such heterogeneity for our understanding of wildlife epidemiology and health. Our findings support the importance of fine‐scale environmental variation for wildlife disease ecology and provides new evidence that such effects may vary across demographic groups within a population.

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Section: Discussioncontrasting

confidence: 99%

“…We found that high levels of moisture (F) were associated with lower parasite burdens. While contrary to our expectationsrainfall has been found to favour strongyle larval survival (Zouyed et al, 2016)-moisture may not be limiting strongyle survival on St.…”

Section: Parasite Associations With Pc1 and F In Lambscontrasting

confidence: 99%

Age‐specific impacts of vegetation functional traits on gastrointestinal nematode parasite burdens in a large herbivore

Wiersma

Pakeman

Bal

et al. 2023

Journal of Animal Ecology

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“…The prevalence of GI parasites in Kwadungan village (1150 m above sea level) in the two types of sheep (Wonosobo and thin-tailed) was higher than that in Butuh village (1586 m above sea level), and this observation is in line with the results of a previous report [40]. In fact, these two villages implemented the same breeding management.…”

Section: Discussionsupporting

confidence: 89%

Prevalence of gastrointestinal worms in Wonosobo and thin-tailed sheep on the slope of Mount Sumbing, Central Java, Indonesia

2019

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Aim: This study was conducted to determine the prevalence of gastrointestinal (GI) worms in Wonosobo and thin-tailed sheep from the slope of Mount Sumbing. Materials and Methods: Fecal samples (n=305) were collected directly from the rectum of Wonosobo and thin-tailed sheep during the dry and rainy seasons in Wonosobo Regency, Central Java Province, Indonesia. The presence of GI helminth eggs in the fecal samples was assessed using the modified McMaster egg counting technique. The identification of the eggs or oocysts was done on the basis of their morphology and size. Results: The highest prevalence of GI worms was observed in male thin-tailed sheep (76.47%) during the rainy season, whereas the lowest prevalence was observed in female Wonosobo sheep (47.36%) during the dry season. The types of GI nematodes observed in these two types of sheep were Haemonchus contortus, Ostertagia spp., Trichostrongylus spp., Bunostomum spp., Trichuris spp., and Moniezia spp. The GI worms with the highest prevalence were of Haemonchus spp. and were observed in male thin-tailed sheep. The prevalences of the two types of sheep assessed at an altitude of 1150 m above sea level were higher than those observed at the altitude of 1586 m. The prevalence of clinical and sub-clinical parasites infestation in Wonosobo and thin-tailed sheep in Kwadungan village was significantly different (p<0.05). Conclusion: This study showed that two types of local sheep on the slope of Mount Sumbing are infected with various GI worms during the dry and rainy seasons. The highest prevalence of GI worms was found in thin-tailed sheep at an altitude of 1150 m above sea level during the rainy season, with H. contortus being the most prevalent GI parasites.

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“…Seasonal changes were highly affected the occurrence of intensity of parasites [31]. The present finding was in line with [32] who observed season wise prevalence of gastrointestinal parasitism in goats were highest during rainy season (34.92%) followed by cool (26.86%), hot (26.62%), and lowest in cold (20.39%) seasons.…”

Section: Discussionsupporting

confidence: 91%

Prevalence of Gastrointestinal Parasitic infections in Goats in Western Uttar Pradesh, India

Ramakant,

Sarkar,

Verma

et al. 2024

Act Sci VetSci

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Climate influences assemblages of abomasal nematodes of sheep on steppe pastures in the east of Algeria

Cited by 5 publications

References 14 publications

Age‐specific impacts of vegetation functional traits on gastrointestinal nematode parasite burdens in a large herbivore

Age‐specific impacts of vegetation functional traits on gastrointestinal nematode parasite burdens in a large herbivore

Prevalence of gastrointestinal worms in Wonosobo and thin-tailed sheep on the slope of Mount Sumbing, Central Java, Indonesia

Prevalence of Gastrointestinal Parasitic infections in Goats in Western Uttar Pradesh, India

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