Effect of suboptimal environment and host age on helminth community of black grouse (Tetrao tetrix)

Formenti, Nicoletta; Viganò, Roberto; Rotelli, Luca; Ferrari, Nicola; Cerutti, M.C.; Lanfranchi, P.

doi:10.1007/s10344-012-0681-8

Cited by 8 publications

(2 citation statements)

References 31 publications

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“…The low parasite richness recorded in this work is in accordance with previous studies carried out in Eastern Italian Alps (Viganò et al ., 2012 a , 2012 b ; Formenti et al ., 2013). It is particularly worthy to highlight the complete absence of parasite in the rock partridge, living at high altitude, in areas with more extreme climatic conditions that probably do not allow the development of parasite cycles.…”

Section: Discussionmentioning

confidence: 99%

“…Taking into account that pathogens might have a negative impact on welfare and population dynamics (Hudson, 1986; Holmstad et al ., 2005; Citterio et al ., 2006), the studies on the parasite fauna hosted by endangered species can provide a better understanding of such interactions (Formenti et al ., 2013). However, the health status of wild Galliformes populations is poorly known.…”

Section: Introductionmentioning

confidence: 99%

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Gastroenteric parasite of wild Galliformes in the Italian Alps: implication for conservation management

Fanelli¹,

Menardi²,

Chiodo³

et al. 2019

Parasitology

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This study provides insights about the diversity, prevalence and distribution of alpine wild galliformes gastrointestinal parasite community, trying to fill a gap in the scientific information currently available in scientific literature. The analysis included three host species: 77 rock partridge (Alectoris graeca saxatilis), 83 black grouse (Tetrao tetrix tetrix) and 26 rock ptarmigan (Lagopus muta helveticus) shot during the hunting seasons 2008–2015. Parasites isolated were Ascaridia compar, Capillaria caudinflata and cestodes. The rock ptarmigan was free from gastrointestinal parasites, whereas the most prevalent helminth (37%) was A. compar in both black grouse and rock partridge. C. caudinflata occurrence was significantly higher in black grouse (prevalence = 10%, mean abundance = 0.6 parasites/sampled animal) than in rock partridge (prevalence = 1.20%, mean abundance = 0.01 parasites/sampled animal). Significant differences were detected among hunting districts. A. compar was found with a significant higher degree of infestation in the hunting districts in the northern part of the study area whereas cestodes abundance was higher in Lanzo Valley. Quantitative analysis of risk factors was carried out using a generalized linear model (GLM) only on the most common parasite (A. compar). Latitude was the only factors associated with infestation risk (OR = 52.4). This study provides information on the composition and variability of the parasite community in the alpine Galliformes species.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Gastroenteric parasite of wild Galliformes in the Italian Alps: implication for conservation management

Fanelli¹,

Menardi²,

Chiodo³

et al. 2019

Parasitology

View full text Add to dashboard Cite

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Increased hormonal stress reactions induced in an Alpine Black Grouse (Tetrao tetrix) population by winter sports

Formenti

Viganò

Bionda³

et al. 2015

J Ornithol

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Prevalence of gastrointestinal parasites in a lowland Black Grouse population in Central Europe

et al. 2022

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The Northern German Black Grouse metapopulation has been affected since decades by a sharply decline that has ultimately led to a reduced genetic variability. Gastrointestinal parasitoses are common among Black Grouse, but it is not clear if they have a further negative impact on the development of this already threatened metapopulation. Therefore, between 2011 and 2014, the occurrence and seasonal variation of gastrointestinal parasites were assessed by coproscopical investigations of Black Grouse feces collected in the nature conservation area of the “Lüneburg Heath”. Feces were obtained also from individuals during capture and re-capture activities. In total, 1,187 fecal samples were analyzed, of which 365 were caecal and 822 were rectal feces samples. 86% of the caecal and 95% of the rectal feces samples were parasite negative. Of the positive samples, oocysts of Coccidia spp. showed the highest prevalences of 12.1% in caecal and 1.1% in rectal samples, respectively. Helminths of the species/genera Trichostrongylus tenuis, Ascaridia spp., Heterakis spp., Capillaria spp., and Syngamus trachea were also observed, but at remarkably lower prevalences. High and moderate excretion intensities were observed only for coccidian oocysts. Coccidian infections revealed a seasonal pattern, occurring mostly during autumn and winter. Nematode eggs occurred more frequently in spring and summer. Four of the seven Black Grouse that were caught and equipped with GPS transmitters, presented high excretion intensities of coccidian oocysts. Despite high/moderate oocyst excretion, no negative health impact was observed, suggesting low pathogenicity of the infecting coccidia species or subsided infections. In contrast to previous studies, this Black Grouse population showed low prevalences of a rather narrow spectrum of parasites. We did not observe any negative impact of parasite infections on this population, which could be responsible for its decline. Thus, causes of decline are to be ascribed to other proximate and ultimate factors.

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Effect of suboptimal environment and host age on helminth community of black grouse (Tetrao tetrix)

Cited by 8 publications

References 31 publications

Gastroenteric parasite of wild Galliformes in the Italian Alps: implication for conservation management

Gastroenteric parasite of wild Galliformes in the Italian Alps: implication for conservation management

Increased hormonal stress reactions induced in an Alpine Black Grouse (Tetrao tetrix) population by winter sports

Prevalence of gastrointestinal parasites in a lowland Black Grouse population in Central Europe

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