Are sick individuals weak competitors? Competitive ability of snails parasitized by a gigantism-inducing trematode
Seppälä, O., Karvonen, A., Kuosa, M., Haataja, M., & Jokela, J. (2013). Are sick individuals weak competitors? Competitive ability of snails parasitized by a gigantism-inducing trematode. PLOS ONE, 8 (10). doi:10.1371/journal.pone.0079366
Published inPLoS ONE
DisciplineEkologia ja evoluutiobiologia
© 2013 Seppälä et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Parasitized individuals are often expected to be poor competitors because they are weakened by infections. Many trematode species, however, although extensively exploiting their mollusc hosts, also induce gigantism (increased host size) by diverting host resources towards growth instead of reproduction. In such systems, alternatively to reduced competitive ability due to negative effects of parasitism on host performance, larger size could allow more efficient resource acquisition and thus increase the relative competitive ability of host individuals. We addressed this hypothesis by testing the effect of a trematode parasite Diplostomum pseudospathaceum on the competitive ability of its snail host Lymnaea stagnalis. We experimentally examined the growth of snails kept in pairs in relation to their infection status and intensity of resource competition (i.e. food availability). We found that parasitized snails grew faster and their reproduction was reduced compared to unparasitized individuals indicating parasite-induced gigantism. However, growth of the snails was faster when competing with parasitized individuals compared to unparasitized snails indicating reduced competitive ability due to parasitism. The latter effect, however, was relatively weak suggesting that the effects of the parasite on snail physiology may partly override each other in determining competitive ability. ...
PublisherPublic Library of Science
MetadataShow full item record
Except where otherwise noted, this item's license is described as © 2013 Seppälä et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Showing items with similar title or keywords.
Avoiding perceived past resource use of potential competitors affects niche dynamics in a bird community Forsman, Jukka T.; Kivelä, Sami M.; Jaakkonen, Tuomo; Seppänen, Janne-Tuomas; Gustafsson, Lars; Doligez, Blandine (BioMed Central Ltd., 2014)Abstract. Background: Social information use is usually considered to lead to ecological convergence among involved con- or heterospecific individuals. However, recent results demonstrate that observers can also actively ...
Variation in parasite resistance of Arctic charr, Salvelinus alpinus, between and within sympatric morphs Karvonen, Anssi; Beck, Samantha V.; Skúlason, Skúli; Kristjánsson, Bjarni K.; Leblanc, Camille A. (Wiley-Blackwell, 2021)Genetic variation in resistance against parasite infections is a predominant feature in host–parasite systems. However, mechanisms maintaining genetic polymorphism in resistance in natural host populations are generally ...
Is it interspecific information use or aggression between putative competitors that steers the selection of nest-site characteristics? A reply to Slagsvold and Wiebe Forsman, Jukka T.; Seppänen, Janne-Tuomas; Mönkkönen, Mikko; Thomson, Robert L.; Kivelä, Sami M.; Krams, Indrikis; Loukola, Olli J. (Wiley-Blackwell Publishing Ltd., 2018)A growing number of studies have demonstrated that heterospeciﬁc individuals with overlapping resource needs – putative competitors – can provide information to each other that improves the outcomes of decisions. Our studies ...
The effect of temperature on cercariae production of two Rhipidocotyle trematodes parasitizing freshwater mussel, Anodonta anatina. Alabi, Waidi (2013)Two bucephalid trematodes, Rhipidocotyle campanula and R. fennica are known to infect the duck mussel, Anodonta anatina. The infection will lead to decrease growth, reproduction and survival of A. anatina. Given the important ...
Shell morphology of the unionid mussels (Anodonta anatina, Unio pictorum and U. tumidus) in relation to gender and trematode parasitism Moteka, Ebenezar Njimerie (2015)Freshwater mussels (Unionoida) show great variability in shell morphology which can be associated with differences in habitat, sex and/or parasite infection. Three unionid mussel species, (Anodonta anatina, Unio pictorum ...