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Robert Poulin
University of Otago
EcologyPopulationParasite hostingBiologyZoology
626Publications
79H-index
24.6kCitations
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Seasonal infection dynamics characterize many host-parasite interactions, as abiotic conditions drive fundamental biological processes in both hosts and parasites. The extent to which seasonal cycles in parasite abundance are universal, and whether the same underlying mechanisms are responsible for seasonality across different host-parasite associations, have received little attention to date. Here, global patterns of seasonal infection dynamics are tested using a meta-analysis of 693 seasonal c...
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#1Alexandre Mestre (University of Valencia)H-Index: 7
#2Robert Poulin (University of Otago)H-Index: 79
Last. Joaquín Hortal (UFG: Universidade Federal de Goiás)H-Index: 38
view all 3 authors...
Range expansion results from complex eco-evolutionary processes where range dynamics and niche shifts interact in a novel physical space and/or environment, with scale playing a major role. Obligate symbionts (i.e. organisms permanently living on hosts) differ from free-living organisms in that they depend on strong biotic interactions with their hosts which alter their niche and spatial dynamics. A symbiotic lifestyle modifies organism-environment relationships across levels of organisation, fr...
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#1Robert Poulin (University of Otago)H-Index: 79
#2Bronwen Presswell (University of Otago)H-Index: 8
Last. Fátima Jorge (University of Otago)H-Index: 8
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Abstract Efforts to find and characterise new parasite species in fish hosts are crucial not just to complete our inventory of Earth’s biodiversity, but also to monitor and mitigate disease threats in fisheries and aquaculture in the face of global climate change. Here, we review recent quantitative assessments of research efforts into fish parasite discovery and taxonomy. We address broad questions including: Are efforts aimed at finding new parasite species targeted at geographical hotspots of...
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#1Alan Eriksson (University of Otago)H-Index: 3
#2Jean-François Doherty (University of Otago)
Last. Robert Poulin (University of Otago)H-Index: 79
view all 5 authors...
1 CitationsSource
#1Olwyn C. FriesenH-Index: 2
#2Sarah GoellnerH-Index: 2
Last. Clément LagrueH-Index: 16
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Parasites directly and indirectly influence the important interactions among hosts such as competition and predation through modifications of behaviour, reproduction and survival. Such impacts can affect local biodiversity, relative abundance of host species and structuring of communities and ecosystems. Despite having a firm theoretical basis for the potential effects of parasites on ecosystems, there is a scarcity of experimental data to validate these hypotheses, making our inferences about t...
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#1Brandon Ruehle (University of Otago)
#2Robert Poulin (University of Otago)H-Index: 79
A prerequisite for a parasitic manipulation to be considered adaptive is that it confers a fitness benefit to the parasite, such as increased transmission to another host. These manipulations can involve alterations to a wide range of host phenotypic traits, including microhabitat choice. Eye flukes of the trematode family Diplostomidae use fish as intermediate hosts and must be transmitted by predation to a piscivorous bird. In New Zealand, the diplostomid Tylodelphys darbyi infects the eyes of...
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Most parasites from known host species are yet to be discovered and described, let alone those from host species not yet known to science. Here, we use tapeworms of elasmobranchs to identify factors influencing their discovery and explaining the time lag between the descriptions of elasmobranch hosts and their respective tapeworm parasites. The dataset included 918 tapeworm species from 290 elasmobranch species. Data were analysed using linear mixed-effects models. Our findings indicated that we...
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#1Boris W. Berkhout (University of Leicester)H-Index: 2
#2Michael K. Borregaard (AMNH: American Museum of Natural History)H-Index: 17
Last. David W. Thieltges (UU: Utrecht University)H-Index: 6
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AimPositive relationships in compositional similarity between consumer and resource assemblages are widely known in free‐living taxa, but less is known about parasites and their hosts. We investigated whether congruent patterns of assemblage similarity across diverse taxa of hosts and parasites exist at a continental scale and quantified the relative importance of host assemblages and environmental variables in shaping these relationships.LocationEuropean freshwaters.Major taxa studiedThe hosts ...
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#1Alexandre Mestre (University of Valencia)H-Index: 7
#2Robert Poulin (University of Otago)H-Index: 79
Last. Francesc Mesquita-Joanes (University of Valencia)H-Index: 13
view all 7 authors...
1.The role of biotic interactions in shaping the distribution and abundance of species should be particularly pronounced in symbionts. Indeed, symbionts have a dual niche composed of traits of their individual hosts and the abiotic environment external to the host, and often combine active dispersal at finer scales with host‐ mediated dispersal at broader scales. The biotic complexity in the determinants of species distribution and abundance should be even more pronounced for hypersymbionts (sym...
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