Temporal variation in prevalence and cercarial development of Echinostephilla patellae (Digenea, Philophthalmidae) in the intertidal gastropod Patella vulgata

Prinz, Katrin; Kelly, Thomas C.; O’Riordan, Ruth M.; Culloty, Sarah C.

doi:10.2478/s11686-010-0002-x

Cited by 11 publications

(13 citation statements)

References 60 publications

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“…Curtis and Hurd 1983;Hechinger and Lafferty 2005;Koprivnikar et al 2007;Merlo and Etchegoin 2011). In addition, Prinz et al (2010) observed that the temperature increase coincides with a large number of definitive hosts and with a consequent increase in parasite prevalence in the mollusc hosts. The same pattern could apply to the community of larval digeneans in H. australis because during the warmer months (September to April), the Mar Chiquita lagoon becomes an important site for migratory birds as well as a breeding area for native species (Botto et al 1998;Ferrero 2001).…”

Section: Discussionmentioning

confidence: 85%

Can the studies at a spatial scale of 100s meters detect the spatiotemporal fluctuations of a parasite assemblage?

Parietti¹,

Merlo²,

Etchegoin³

2013

Acta Parasitologica

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The importance of small-scale heterogeneity in local factors which overrides that of larger-scales factors, suggest that local factors play a major role in determining the richness and prevalence of larval digeneans in intertidal gastropods. The restricted distribution of the snail Heleobia australis along a 500 m transect in Cangrejo creek (Mar Chiquita, Argentina) provides a good opportunity to test the assumption that a study at spatial scale of 100s meters can detect spatiotemporal fluctuations of a larval digenean assemblage. To analyze that, 3600 specimens of H. australis were collected seasonally during the year 2011. A quantitative variation and a space-time interaction between sampling points and seasons of the year for the total prevalence of larval digeneans and snail’s densities were found, as well as a positive correlation with abiotic factors. These results revealed that the fluctuations in the community of larval digeneans of the snail H. australis can be detected at small spatial scale, using its natural distribution of 500 m. This study also highlights the importance of seasonality as a factor that must be considered in studies focused on the search for patterns structuring the communities of larval digeneans, at medium and large scales.

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Section: Discussionmentioning

confidence: 85%

Can the studies at a spatial scale of 100s meters detect the spatiotemporal fluctuations of a parasite assemblage?

Parietti¹,

Merlo²,

Etchegoin³

2013

Acta Parasitologica

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“…Infection in macaques by directly transmitted nematodes occurs in a cyclic yearly pattern based on breeding season (Macintosh et al 2010). The trematode, Echinostephilla patellae, infection peaks during the summer months because appropriate temperatures allow higher densities of the host, common limpets (Prinz et al 2010). This unimodal pattern can also be seen in Conopid flies parasitizing wild bumblebee species.…”

Section: Discussionmentioning

confidence: 98%

Seasonality of gregarine parasitism in the damselfly, Nehalennia irene: understanding unimodal patterns

et al. 2011

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We studied parasitism by gut protozoans (Apicomplexa: Eugregarinidae) in the damselfly, Nehalennia irene (Hagen) (Odonata: Coenagrionidae). We tested whether there was any seasonal pattern, as has been found for other parasites of damselflies and which has implications for selection on emergence and breeding. Using aggregate data from 12 date-by-site comparisons involving five sites, we found that both prevalence and intensity of gregarine parasitism were seasonally unimodal. Parasitism first increased and then declined seasonally after peaking mid-season. This damselfly species has shown seasonal increases in density followed by declines at several sites including a site sampled in this study. Therefore, similar seasonal changes in a directly transmitted parasite were expected and are now confirmed. Other factors that might account for seasonal changes in parasitism by gregarines are either unlikely or can be discounted including sampling of older damselflies mid-season but not late in the season, or sex biases in parasitism and overrepresentation of the more parasitized sex mid-season.

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“…Depending on the parasite load, 5 to 25 sporocysts per snail were randomly selected and transferred to a glass slide to determine the developmental stages of their contents under the microscope. The number of developmental stages contained in daughter sporocysts was determined, ascribing them to the categories described in Prinz et al (2010) and Fermer et al (2010), i.e.…”

Section: Methodsmentioning

confidence: 99%

“…The co-occurrence of the three stages and the absence of sporocysts containing germinal balls exclusively indicates that M. obovata and C. labracis have a short prepatent infection, as demonstrated in e.g. Echinostephilla patellae (Prinz et al 2010) or Parvatrema minutum (as Meiogymnophallus minutus in Fermer et al 2009Fermer et al , 2010. This allows a continuous rapid production of mature cercariae and their emergence from the snail.…”

Section: Snail and Sporocyst Size In Relation To Parasite Datamentioning

confidence: 99%

“…However, while detailed descriptions of the parthenogenetic generations inside rediae or sporocysts are available (e.g. Touassem and Théron 1986;Dobrovolskij et al 2000), the information on the variation of the proportion of developmental stages over time is scarce (Korniychuk 2008;Fermer et al 2010;Prinz et al 2010) but important in a context of parasite transmission.…”

Section: Introductionmentioning

confidence: 99%

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Trematode maturation patterns in a migratory snail host: What happens during upshore residency in a Mediterranean lagoon?

2015

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Maturation of trematode larval stages is expected to be temporally and spatially adapted to maximise the encounter with the adequate downstream host, i.e. the host, which will be infected by this parasite stage. Since studies on intramolluscan parasite maturation are scarce but important in the context of parasite transmission, the larval development inside sporocysts was monitored during upshore residency of the snail host Gibbula adansonii (Trochidae), i.e., from March to May (2011 and 2013), when these snails temporarily reside in the intertidal habitat of a Western Mediterranean lagoon (40° 37' 35″ N, 0° 44' 31″ E, Spain). Data on the relative quantity of different maturation stages of Cainocreadium labracis and Macvicaria obovata (Opecoelidae) parasitising the G. adansonii as well as on snail and sporocyst size were explored using linear models and linear mixed models. The effect of the trematodes on snail growth was shown to be species-specific, with snail and sporocyst size acting as proxies of the reproductive capacity of M. obovata but not that of C. labracis. The number of cercarial embryos and germinal balls did not show monthly variation in either parasite species, but a higher number of mature stages and the highest maturity index was found in April. Hence, during the snail's limited spawning-related presence in the upshore waters of the lagoon, continuous production and output of infectious cercariae was observed, which indicates a link between larval maturation and snail migration. The synchronization of snails, mature parasite transmission stages and downstream hosts in time and space guarantees a successful completion of the life cycle.

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Temporal variation in prevalence and cercarial development of Echinostephilla patellae (Digenea, Philophthalmidae) in the intertidal gastropod Patella vulgata

Cited by 11 publications

References 60 publications

Can the studies at a spatial scale of 100s meters detect the spatiotemporal fluctuations of a parasite assemblage?

Can the studies at a spatial scale of 100s meters detect the spatiotemporal fluctuations of a parasite assemblage?

Seasonality of gregarine parasitism in the damselfly, Nehalennia irene: understanding unimodal patterns

Trematode maturation patterns in a migratory snail host: What happens during upshore residency in a Mediterranean lagoon?

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