Downloads: 18

Files in This Item:
File Description SizeFormat 
zs160207.pdf2.73 MBAdobe PDFView/Open
Full metadata record
DC FieldValueLanguage
dc.contributor.authorOkano, Jun-ichi
dc.contributor.authorTayasu, Ichiro
dc.contributor.authorNakano, Shin-ichi
dc.contributor.authorOkuda, Noboru
dc.contributor.alternative奥田, 昇
dc.date.accessioned2020-07-21T01:10:14Z-
dc.date.available2020-07-21T01:10:14Z-
dc.date.issued2017-12-01
dc.identifier.issn0289-0003
dc.identifier.urihttp://hdl.handle.net/2433/252791-
dc.description.abstractThe mechanisms for the coexistence of multiple species occupying the same ecological niche are often puzzling. Predator effects on competitively superior species is one possible mechanism. In this study, we tested whether the presence of size-selective predators (fishes) acts as a mechanism for the coexistence of two species of case-bearing caddisfly larvae, Perissoneura paradoxa and Psilotreta kisoensis (Odontoceridae, Trichoptera). The larvae of these two species have similar ecological and life history traits except their body size, and they have been found to coexist only in habitats shared with predatory fishes. Experiments on intra and interspecific competition revealed that the larger Pe. paradoxa always outcompeted the smaller Ps. kisoensis in the absence of predatory fishes, suggesting that Pe. paradoxa performed intra-guild predation on Ps. kisoensis. We also conducted experiments to examine how strongly each of these species responded in terms of case repair with/without a predator chemical cue after their cases were partly dismantled. Perissoneura paradoxa exhibited a stronger case repair response in the presence of a predator chemical cue than that exhibited by Ps. kisoensis, suggesting that Pe. paradoxa is more vulnerable to fish predation, probably because their body size is in the preferred prey range of fishes. We suggest that the presence of predators works in the favor of smaller, subordinate species through size-selective predator effects, enabling these two competitive species to coexist in the same habitat.
dc.format.mimetypeapplication/pdf
dc.language.isoeng
dc.publisherZoological Society of Japan
dc.rights© 2017 Zoological Society of Japan
dc.rights許諾条件に基づいて掲載しています。
dc.subjectchemical cue
dc.subjectintra-guild predation
dc.subjectcompetitive exclusion
dc.subjectpredator-mediated coexistence
dc.titleDifferential Responses of Two Ecologically Similar Case-Bearing Caddisfly Species to a Fish Chemical Cue: Implications for a Coexistence Mechanism
dc.type.niitypeJournal Article
dc.identifier.jtitleZoological Science
dc.identifier.volume34
dc.identifier.issue6
dc.identifier.spage461
dc.identifier.epage467
dc.relation.doi10.2108/zs160207
dc.textversionpublisher
dc.addressCenter for Ecological Research, Kyoto University
dc.addressCenter for Ecological Research, Kyoto University・Research Institute for Humanity and Nature, Kyoto
dc.addressCenter for Ecological Research, Kyoto University
dc.addressCenter for Ecological Research, Kyoto University・Research Institute for Humanity and Nature, Kyoto
dc.identifier.kaken12J01273 / 26840146
Appears in Collections:Journal Articles

Show simple item record

Export to RefWorks


Export Format: 


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.