Parasite-Mediated Competition: Some Predictions and Tests

Price, Peter W.; Westoby, Mark; Rice, Barbara

doi:10.1086/284805

Cited by 160 publications

(126 citation statements)

References 42 publications

Supporting

Mentioning

111

Contrasting

Order By: Relevance

“…Intuitively, more numerous host species should be larger targets of selection on parasites; therefore, it is expected that parasites should be more prevalent or numerous in widespread hosts (Morand et al 2010). Stated another way, the parasite is expected to be better adapted to the widespread and more abundant host (Price et al 1988;Forbes et al, 1999;Ilvonen et al, 2011). There is also the possibility that widespread hosts bring their parasites with them into regions occupied by less widespread species (Durrer and Schmid-Hempel 1995).…”

Section: Discussionmentioning

confidence: 99%

Higher gregarine parasitism often in sibling species of host damselflies with smaller geographical distributions

Mlynarek

Hassall

Forbes

2012

Ecological Entomology

View full text Add to dashboard Cite

Short running head: Sibling damselfly spp. and gregarine parasitism 3 ABSTRACT 1. This study investigated interspecific variation in parasitism by gregarines (Eugregarinorida: Actinocephalidae), among sibling species of damselflies (Odonata: Zygoptera), in relation to relative size of geographical ranges of host species. 2. Gregarines are considered generalist parasites, particularly for taxonomically related host species collected at the same sites or area. Prevalence and median intensity of gregarine parasitism was obtained for 1,338 adult damselflies, representing 14 species (seven sibling species pairs) across three families within the suborder Zygoptera. Damselflies were collected at six local sites in Southeastern Ontario, during same periods over the season. 3. Six of seven species pairs had significant differences in parasitism between sibling species.The less widespread host species was the more parasitized for three species pairs with significant differences in gregarine prevalence, and for three species pairs with differences in median intensity. The more widespread host had higher prevalence of infection as expected, in the fourth species pair.. 4. Future studies on ecological determinants of parasitism among related species should examine robust measures of abundance of species and representation of species regionally.

show abstract

Section: Discussionmentioning

confidence: 99%

Higher gregarine parasitism often in sibling species of host damselflies with smaller geographical distributions

Mlynarek

Hassall

Forbes

2012

Ecological Entomology

View full text Add to dashboard Cite

show abstract

“…And, because the impacts of an invader correlate with its performance (e.g., Crivelli 1983), a reduction in parasites will ultimately enhance an invader's impacts (Torchin et al 2002). For example, lack of parasites may confer an advantage to an invader competing with heavily parasitized native species because parasites can affect the viability and competitiveness of their hosts (Park 1948;Freeland 1983;Holt 1984;Price et al 1988;Lafferty 1991;Minchella and Scott 1991;Schall 1992;Holt and Lawton 1994). Second, parasites that are transferred with non-indigenous species may themselves threaten native species.…”

Section: Introductionmentioning

confidence: 99%

Differential Parasitism of Native and Introduced Snails: Replacement of a Parasite Fauna

2005

View full text Add to dashboard Cite

The role of parasites in a marine invasion was assessed by first examining regional patterns of trematode parasitism in the introduced Japanese mud snail, Batillaria cumingi (= B. attramentaria), in nearly all of its introduced range along the Pacific Coast of North America. Only one parasite species, which was itself a non-native species, Cercaria batillariae was recovered. Its prevalence ranged from 3 to 86%. Trematode diversity and prevalence in B. cumingi and a native sympatric mud snail, Cerithidea californica, were also compared in Bolinas Lagoon, California. Prevalence of larval trematodes infecting snails as first intermediate hosts was not significantly different (14% in B. cumingi vs 15% in C. californica). However, while the non-native snail was parasitized only by one introduced trematode species, the native snail was parasitized by 10 native trematode species. Furthermore, only the native, C. californica, was infected as a second intermediate host, by Acanthoparyphium spinulosum (78% prevalence). Given the high host specificity of trematodes for first intermediate hosts, in marshes where B. cumingi is competitively excluding C. californica, 10 or more native trematodes will also become locally extinct.

show abstract

“…It has been previously suggested that the flying squirrel species have a reciprocal distribution at a larger spatial scale in Ontario . Others (Price et al 1988;Wetzel and Weigl 1994) have hypothesized that these two species may exhibit parasite-mediated competition. The suggested parasite is Strongyloides robustus which the southern flying squirrel can apparently tolerate better than the northern species.…”

Section: Discussionmentioning

confidence: 99%

Patch occupancy by squirrels in fragmented deciduous forest: effects of behavior

Walpole

Bowman

2010

Acta Theriol

View full text Add to dashboard Cite

We tested whether species-specific behavioral traits could explain patterns of habitat patch occupancy by five different squirrel species in Ontario, Canada: the northern and southern flying squirrel (Glaucomys sabrinus and Glaucomys volans), the North American red squirrel (Tamiasciurus hudsonicus), the eastern chipmunk (Tamias striatus), and the eastern gray squirrel (Sciurus carolinensis). Flying squirrel species exhibit group nesting in winter, which may put them at risk of extirpation in small patches with few individuals to contribute to group nests. Flying squirrels are also volant, potentially making non-treed matrix a barrier. Our surveys revealed that G. sabrinus was most likely to occur in large patches that were embedded in landscapes with low connectivity, and least likely to occur in small patches in highly connected landscapes. Conversely, G. volans was most likely to occur in large, well-connected patches and least likely to occur in small, unconnected patches. Patch occupancy by the cursorial squirrels was not strongly influenced by patch area or isolation. These findings reinforce previous studies suggesting that an understanding of species-specific traits such as behavior is an important consideration when interpreting habitat fragmentation effects.

show abstract

Parasite-Mediated Competition: Some Predictions and Tests

Cited by 160 publications

References 42 publications

Higher gregarine parasitism often in sibling species of host damselflies with smaller geographical distributions

Higher gregarine parasitism often in sibling species of host damselflies with smaller geographical distributions

Differential Parasitism of Native and Introduced Snails: Replacement of a Parasite Fauna

Patch occupancy by squirrels in fragmented deciduous forest: effects of behavior

Contact Info

Product

Resources

About