Effect of temperature on emergence, survival and infectivity of cercariae of the marine trematode Renicola roscovita (Digenea: Renicolidae)

Thieltges, David W.; Rick, J.

doi:10.3354/dao073063

Cited by 125 publications

(26 citation statements)

References 29 publications

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“…Contrary to other studies, in which infectivity positively correlated with increasing temperature [52], [53], the temperature treatment had no effect on the infectivity of C. lingua . Infection patterns were consistent across treatments and not influenced by the heat wave, which indicates that local adaptation between genotypes was more important than first order temperature effects on the parasite.…”

Section: Discussioncontrasting

confidence: 99%

Consistent Pattern of Local Adaptation during an Experimental Heat Wave in a Pipefish-Trematode Host-Parasite System

et al. 2012

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Extreme climate events such as heat waves are expected to increase in frequency under global change. As one indirect effect, they can alter magnitude and direction of species interactions, for example those between hosts and parasites. We simulated a summer heat wave to investigate how a changing environment affects the interaction between the broad-nosed pipefish (Syngnathus typhle) as a host and its digenean trematode parasite (Cryptocotyle lingua). In a fully reciprocal laboratory infection experiment, pipefish from three different coastal locations were exposed to sympatric and allopatric trematode cercariae. In order to examine whether an extreme climatic event disrupts patterns of locally adapted host-parasite combinations we measured the parasite's transmission success as well as the host's adaptive and innate immune defence under control and heat wave conditions. Independent of temperature, sympatric cercariae were always more successful than allopatric ones, indicating that parasites are locally adapted to their hosts. Hosts suffered from heat stress as suggested by fewer cells of the adaptive immune system (lymphocytes) compared to the same groups that were kept at 18°C. However, the proportion of the innate immune cells (monocytes) was higher in the 18°C water. Contrary to our expectations, no interaction between host immune defence, parasite infectivity and temperature stress were found, nor did the pattern of local adaptation change due to increased water temperature. Thus, in this host-parasite interaction, the sympatric parasite keeps ahead of the coevolutionary dynamics across sites, even under increasing temperatures as expected under marine global warming.

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Section: Discussioncontrasting

confidence: 99%

Consistent Pattern of Local Adaptation during an Experimental Heat Wave in a Pipefish-Trematode Host-Parasite System

et al. 2012

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“…there should be a high encounter rate. However, the maximum recovery rate was only around 35% (the differences in recovery rates in controls result from the strong temperature dependence of infection processes (Thieltges and Rick 2006)). Observational studies have indicated that host individuals may manage to reject approaching cercariae and even remove cercariae attempting to penetrate the foot Wegeberg et al 1999).…”

Section: Filtration Capacity In Mussel Units Recovery Relative To Conmentioning

confidence: 98%

Invaders interfere with native parasite–host interactions

et al. 2008

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The introduction of species is of increasing concern as invaders often reduce the abundance of native species due to a variety of interactions like habitat engineering, predation and competition. A more subtle and not recognized effect of invaders on their recipient biota is their potential interference with native parasite-host interactions. Here, we experimentally demonstrate that two invasive molluscan filter-feeders of European coastal waters interfere with the transmission of free-living infective trematode larval stages and hereby mitigate the parasite burden of native mussels (Mytilus edulis). In laboratory mesocosm experiments, the presence of Pacific oysters (Crassostrea gigas) and American slipper limpets (Crepidula fornicata) reduced the parasite load in mussels by 65-77% and 89% in single and mixed species treatments, respectively. Both introduced species acted as decoys for the trematodes thus reducing the risk of hosts to become infected. This dilution effect was density-dependent with higher reductions at higher invader densities. Similar effects in a field experiment with artificial oyster beds suggest the observed dilution effect to be relevant in the field. As parasite infections have detrimental effects on the mussel hosts, the presence of the two invaders may elicit a beneficial effect on mussels. Our experiments indicate that introduced species alter native parasitehosts systems thus extending the potential impacts of invaders beyond the usually perceived mechanisms.

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“…The following regions were sampled: West-Netherlands (locations 1 and 2), East-Netherlands (locations 3 and 4), South-Germany (locations 5 and 6) and North-Germany (locations and 8). All beds were sampled in autumn 2012 (Online Resource 1) as this period is well suited for documenting infection levels of macroparasites (summer is the main period of production of trematodes (Thieltges and Rick 2006;Poulin 2006) and parasitic copepods (Grainger 1951) and of the settlement of P. ciliata larvae (Harms and Anger 1983).…”

Section: Sampling On Hierarchical Scalesmentioning

confidence: 99%

How invasive oysters can affect parasite infection patterns in native mussels on a large spatial scale

et al. 2019

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Declaration of authorship: MAG, DWT and JVDM conceived and designed the study. MAG, RN, MM, CB and KMW conducted fieldwork. MAG, RN and MM performed parasite dissections. PCL conducted the molecular identification. EOF and AMW compiled data on biotic and environmental variables. MAG conducted the statistical analyses with input from JVDM. MAG and DWT wrote the manuscript with significant contributions of all other authors.

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Effect of temperature on emergence, survival and infectivity of cercariae of the marine trematode Renicola roscovita (Digenea: Renicolidae)

Cited by 125 publications

References 29 publications

Consistent Pattern of Local Adaptation during an Experimental Heat Wave in a Pipefish-Trematode Host-Parasite System

Consistent Pattern of Local Adaptation during an Experimental Heat Wave in a Pipefish-Trematode Host-Parasite System

Invaders interfere with native parasite–host interactions

How invasive oysters can affect parasite infection patterns in native mussels on a large spatial scale

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