Invasive freshwater fish (Leuciscus leuciscus) acts as a sink for a parasite of native brown trout Salmo trutta

Caffrey, Joe; Vogel, Sebastian; Matthews, Sharon M.; Costantini, E; Holland, Celia V.

doi:10.1007/s10530-020-02253-1

Cited by 14 publications

(19 citation statements)

References 68 publications

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“…Intensity of P. tereticollis infection did not differ significantly between the invasion core and front (negative binomial GLMM: df = 41, coefficient ± SE = 0.83 ± 1.30, Z = 0.63, P = 0.53). Both prevalence (binomial GLMM: df = 282, coefficient ± SE = 0.07 ± 0.01, Z = 5.71, P < 0.001) and intensity (negative binomial GLMM: df = 41, coefficient ± SE = 1.05 ± 0.17, Z = 6.35, P < 0.001) of P. tereticollis increased with host size (see also Tierney et al ., 2020). Pomphorhynchus tereticollis infection at the front was highly aggregated with a small number of infected fish (3.7%) hosting high worm burdens (mean intensity ± standard deviation (SD) = 48 ± 35) (table 3).…”

Section: Resultsmentioning

confidence: 99%

“…(2011) were used for parasite identification. The identification of P. tereticollis was additionally confirmed with molecular analysis (see Tierney et al ., 2020). Five digenean trematode specimens and three nematode specimens found in common dace were unidentifiable beyond class (Digenea) and phylum (Nematoda), respectively, because the characteristic features in these specimens were not sufficiently clear to allow for morphological identification.…”

Section: Methodsmentioning

confidence: 99%

“…Prevalence of the acanthocephalan P. tereticollis was modelled with a binomial generalized linear mixed model (GLMM) and intensity of P. tereticollis was modelled with a negative binomial GLMM using the R package glmmTMB (Brooks et al ., 2017). Data on P. tereticollis combined intra-intestinal adult and extra-intestinal subadult parasite individuals (see Tierney et al ., 2020). Models incorporated invasion region (front or core) and host standard length as fixed effects, and subsite and year as random effects.…”

Section: Methodsmentioning

confidence: 99%

“…Invasive species usually do not accumulate a sufficient number of local parasite species to replace the lost parasite diversity (Torchin & Mitchell, 2004; Loxton et al ., 2016; Schoeman et al ., 2019; Stuart et al ., 2020) (although see Gendron et al ., 2012; Lacerda et al ., 2013). This may be due to low competency of invasive hosts for native parasites (Paterson et al ., 2013; Tierney et al ., 2020) or the absence of host-specific parasites in the invaded range (Kennedy & Bush, 1994; Torchin & Mitchell, 2004). However, it has been suggested that invasive species are more likely to be infected with parasite species that are directly transmitted (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…Common dace invaded the lower River Barrow in 1992 (Caffrey et al ., 2007), and by 2015 their range had spread approximately 90 km upstream (Delanty et al ., 2017). Two helminth species (both native to Ireland) have previously been recorded in common dace in Ireland: the eel acanthocephalan Acanthocephalus clavula (Kane, 1966) and the generalist acanthocephalan Pomphorhynchus tereticollis (Tierney et al ., 2020). The current study is the first survey of the helminth community of invasive common dace to be conducted in Ireland.…”

Section: Introductionmentioning

confidence: 99%

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Evidence for enemy release in invasive common daceLeuciscus leuciscusin Ireland: a helminth community survey and systematic review

Caffrey¹,

Matthews

Costantini

et al. 2020

J. Helminthol.

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Invasive species lose parasites in the process of invasion and tend to be less parasitized than conspecifics in the native range and sympatric native species in the invasive range (enemy release). We evaluated enemy release in an invasive freshwater fish in Ireland, common dace Leuciscus leuciscus, using helminth parasite community surveys at the core and front of the invasive range of common dace. Furthermore, we undertook a systematic literature review of helminth infection in common dace across its native range in Great Britain and Europe and invasive range in Ireland. The helminth parasite community survey revealed that invasive common dace were infected with fewer helminth species at the invasion front than at the core. Four helminth taxa – Acanthocephala, Monogenea, Digenea and Nematoda – were present in dace at the invasion core compared to only a single helminth species (Pomphorhynchus tereticollis) at the front. The systematic review revealed that invasive common dace in Ireland hosted fewer species of helminths than common dace in the native range. We report a total of three helminth species in common dace in Ireland compared to 24 in Great Britain and 84 in Continental Europe. Our results support the hypotheses that invasive populations are less parasitized than native populations and that more recently established populations host fewer parasites. However, we demonstrate that invasive species may continue to experience release from parasites long after initial invasion.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Evidence for enemy release in invasive common daceLeuciscus leuciscusin Ireland: a helminth community survey and systematic review

Caffrey¹,

Matthews

Costantini

et al. 2020

J. Helminthol.

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How do noncompetent hosts cause dilution of parasitism? Testing hypotheses for native and invasive mosquitoes

McIntire

Chappell

Juliano

2021

Ecology

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Parasite dilution occurs in varied systems, via multiple potential mechanisms. We used laboratory manipulation and field surveys to test for invader‐induced parasite dilution via two specific mechanisms: host–host competition and encounter reduction. In the laboratory, single Aedes triseriatus larvae were exposed to one of eight combinations of: parasitic Ascogregarina barretti, +/−1 cohabiting Aedes albopictus larva during parasite exposure, and +/−1 cohabiting A. albopictus larva after infectious parasite removal. Larval infection intensity (predicted to decrease via dilution by encounter reduction) was not significantly affected by A. albopictus. Adult infection prevalence and intensity (predicted to decrease via dilution by host–host competition) were significantly greater with A. albopictus, suggesting parasite amplification by interspecific competition, an effect potentially mediated by competition increasing A. triseriatus development time. In the field, we tested for effects of potential dilution host abundances on prevalence and abundance of A. barretti in A. triseriatus larvae. Piecewise path analysis yielded no evidence of host–host competition impacting parasitism in the field, but instead indicated a significant direct negative effect of Aedes spp. abundance on parasite abundance in A. triseriatus, which is consistent with dilution via encounter reduction in the field, but only in tree holes, not in man‐made containers. Our results are consistent with the hypothesis that a noncompetent invader can alter the native host–parasite relationship, but our laboratory and field data yield differing results. This difference is likely due to laboratory experiment testing for per capita effects of dilution hosts on parasitism, but field analysis testing for effects of dilution host abundance on parasitism. Individually, host–host competition with the invader amplifies, rather than dilutes, parasite success. In contrast, our path analysis is consistent with the hypothesis that dilution of parasitism results from increased abundance of noncompetent hosts in the field.

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The spatial ecology of brown trout (Salmo trutta) and dace (Leuciscus leuciscus) in an artificially impounded riverine habitat: results from an acoustic telemetry study

et al. 2020

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Invasive freshwater fish (Leuciscus leuciscus) acts as a sink for a parasite of native brown trout Salmo trutta

Cited by 14 publications

References 68 publications

Evidence for enemy release in invasive common daceLeuciscus leuciscusin Ireland: a helminth community survey and systematic review

Evidence for enemy release in invasive common daceLeuciscus leuciscusin Ireland: a helminth community survey and systematic review

How do noncompetent hosts cause dilution of parasitism? Testing hypotheses for native and invasive mosquitoes

The spatial ecology of brown trout (Salmo trutta) and dace (Leuciscus leuciscus) in an artificially impounded riverine habitat: results from an acoustic telemetry study

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