The intestinal nematode Trichuris arvicolae affects the fecundity of its host, the common vole Microtus arvalis

Déter, Julie; Cosson, Jean‐François; Chaval, Yannick; Charbonnel, Nathalie; Morand, Sergé

doi:10.1007/s00436-007-0584-x

Cited by 18 publications

(15 citation statements)

References 23 publications

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“…We were motivated by two major observations. First, several studies demonstrate that parasites negatively influence reproduction in rodents (Neuhaus 2003, Deter et al 2007, Vandegrift et al 2008, Hillegass et al 2010, suggesting that a decrease in parasitism could explain the increase in mouse reproduction that we have observed in burned forest (Zwolak andForesman 2008, Zwolak et al 2012). Secondly, we also had reasons to suspect that fire could suppress parasite populations.…”

Section: Introductionmentioning

confidence: 79%

Reduced ectoparasite loads of deer mice in burned forest: From fleas to trees?

et al. 2013

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Abstract. We tested whether reduced parasite loads might contribute to high post-fire abundances of deer mice (Peromyscus maniculatus). We performed parasite examinations of 54 mice captured in burned forest in the area of Davis Fire (western Montana, USA), and 26 mice captured in nearby unburned forest. Mean abundance of ectoparasites (fleas, ticks, and lice) was lower in burned than in unburned forest. The difference was particularly pronounced for fleas, which were reduced by 70% in burned forest. Endoparasites (i.e., nematodes and cestodes) were unaffected. Mechanisms for the lower mean abundance of fleas in burned areas are not known, but might involve flea mortality in burrows during fire or decreased transmission, survival, or both in the post-fire environment. We propose several hypothetical pathways through which reduced ectoparasite loads could cause an increase in deer mouse abundance, such as improved health status or increased foraging efficiency of mice, both of which could translate into the increased reproduction that has been reported in mice from burned forest. We encourage experimental tests of the ectoparasite release hypothesis of the post-fire increase in deer mouse abundance.

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Section: Introductionmentioning

confidence: 79%

Reduced ectoparasite loads of deer mice in burned forest: From fleas to trees?

et al. 2013

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“…However, we can hypothesize that in natural conditions, the decrease of life span induced by parasites or other extrinsic mortality factors leads to a lower number of breeding opportunities and to a lower life-time reproductive success, especially for short-lived species exposed to high extrinsic mortality factors (Christe et al 2006). Moreover, experimental evidence suggests that endoparasitism reduces the reproductive success of breeding common voles (Deter et al 2007). …”

Section: Discussionmentioning

confidence: 99%

“…Reduction of fecundity due to ectoparasitism has been documented several times (e.g. Deter et al 2007 ;Møller, 1997 ;Neuhaus, 2003 ;Saino et al 1998), whereas evidence of the negative effect of ectoparasites on life span and thus on the reproductive life-time is scarce (but see Brown et al 1995).…”

Section: Introductionmentioning

confidence: 99%

Flea infestation reduces the life span of the common vole

Devevey

Christe

2009

Parasitology

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Parasitism is often a source of variation in host's fitness components. Understanding and estimating its relative importance for fitness components of hosts is fundamental from physiological, ecological and evolutionary perspectives. Host-parasite studies have often reported parasite-induced reduction of host fecundity, whereas the effect of parasitism on host survival has been largely neglected. Here, we experimentally investigated the effect of infestation by rat fleas (Nosopsyllus fasciatus) on the life span of wild-derived male common voles (Microtus arvalis) bred in captivity. We found that the mean life span of parasitized voles was reduced by 36% compared to control voles. Parasitized voles had a smaller body size, but a relatively larger heart and spleen than control voles. These results indicate an effect of flea infestation on host life span and our findings strongly suggest that ectoparasites should be taken into account in the studies of host population dynamics.

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“…Here, we used gastrointestinal helminths (GIH) communities in commensal rodents to test some predictions relating animal invasion success and parasitism. Besides of their known regulatory effects on rodent fitness (Deter et al 2007) and population dynamics (Vandegrift & Hudson 2009), GIH were found to be highly diversified and prevalent in rodent populations in Senegal (Brouat et al 2007). A loss or reduction of parasites by invasive rodents along their invasion route was expected under the PR hypothesis, and/or an increase of parasitism in native rodents when they co-occurred with invasive ones under the SO or SB hypotheses.…”

mentioning

confidence: 96%

Parasites and invasions: changes in gastrointestinal helminth assemblages in invasive and native rodents in senegal

Diagne

Ribas

Charbonnel

et al. 2016

Preprint

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Postal address: CBGP, 755 avenue du campus Agropolis, 34988 Montferrier-sur-Lez.Telephone: + 33(0)4 99 62 33 08 / Fax : + 33(0)4 99 62 33 45 Abstract Understanding why some exotic species become widespread and abundant in their colonized range is a fundamental issue that still needs to be addressed. Among many hypotheses, newly established host populations may benefit from a "parasite release" through impoverishment of their original parasite communities or reduced infection levels. Moreover, the fitness of competing native hosts may be affected by the acquisition of exotic taxa from invaders ("parasite spill-over") and/or by an increased transmission risk of native parasites due to their amplification by invaders ("parasite spill-back"). We focused on gastrointestinal helminth (GIH) communities to determine whether these predictions could explain the ongoing invasion success of the commensal house mouse (Mus musculus domesticus) and black rat (Rattus rattus), as well as the associated drop of native Mastomys species, in Senegal. A decrease of overall prevalence and individual species richness of GIH were observed along the invasion gradients as well as lower specific prevalence/abundance (Aspiculuris tetraptera in M. m. domesticus, Hymenolepis diminuta in R. rattus) on the invasion front. Conversely, we did not find any strong evidence of GIH spill-over or spill-back in invasion fronts, where native and invasive rodents co-occurred. For both invasive species, our results were consistent with the predictions of the parasite release hypothesis. Further experimental research is needed to determine whether and how the loss of GIH and reduced infection levels along invasion routes may result in any advantageous effects on invader fitness and competitive advantage.

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The intestinal nematode Trichuris arvicolae affects the fecundity of its host, the common vole Microtus arvalis

Cited by 18 publications

References 23 publications

Reduced ectoparasite loads of deer mice in burned forest: From fleas to trees?

Reduced ectoparasite loads of deer mice in burned forest: From fleas to trees?

Flea infestation reduces the life span of the common vole

Parasites and invasions: changes in gastrointestinal helminth assemblages in invasive and native rodents in senegal

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