Reference : Trophic specialisations in alternative heterochronic morphs
Scientific journals : Article
Life sciences : Zoology
Life sciences : Environmental sciences & ecology
Life sciences : Aquatic sciences & oceanology
http://hdl.handle.net/2268/3047
Trophic specialisations in alternative heterochronic morphs
English
Denoël, Mathieu mailto [Université de Liège - ULg > Département de Biologie, Ecologie et Evolution > Biologie du comportement - Ethologie et psychologie animale >]
Schabetsberger, Robert [University of Salzburg, Austria > > > > > > >]
Joly, Pierre [Université Claude Bernard - Lyon 1 - UCLB - France > > > > > > >]
2004
Naturwissenschaften (Die)
Springer-Verlag
91
2
81-84
Yes (verified by ORBi)
International
0028-1042
New York
[en] Feeding specialisation ; Diet ; Alpine lake ; Paedomorphosis ; Greece ; France ; Alpine newt ; Amphibian ; Triturus ; Heterochrony ; Triturus alpestris ; Ichthyosaura alpestris ; Resource partitioning ; Pindos ; Drakolimni ; Foraging ; Plankton
[fr] Mesotriton alpestris ; Triton alpestre ; amphibien ; Lac de la Cabane ; Smolikas ; Timphi
[en] Polymorphisms are suspected of reducing competition among conspecifics in heterogeneous environments by allowing differential resource use. However the adaptive significance of alternative morphs has been poorly documented. The aim of this study is to determine food partitioning of two heterochronic morphs of the Alpine newt, Triturus alpestris, in mountain lakes. The morphs differ in the functional morphology of their feeding apparatus. Only paedomorphs are able to expel water during prey suction behind the mouth through gill slits. We observed a substantial trophic differentiation between morphs in all lakes. Paedomorphs preyed mainly on plankton, whereas metamorphs foraged on terrestrial invertebrates that fell upon the water surface. This resource partitioning may facilitate the coexistence of the alternative morphs in lakes devoid of vertebrate competitors. Food diversity may thus favour the evolutionary maintenance of facultative polymorphism in natural populations.
Fonds pour la formation à la Recherche dans l'Industrie et dans l'Agriculture (Communauté française de Belgique) - FRIA ; Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS
Researchers ; Professionals
http://hdl.handle.net/2268/3047
10.1007/s00114-003-0492-6
This paper is also available at the publisher website (Springer): http://www.springerlink.com

File(s) associated to this reference

Fulltext file(s):

FileCommentaryVersionSizeAccess
Restricted access
Naturwissenschaften_2004.pdfThis is the published pdfPublisher postprint131.06 kBRequest copy
Open access
Naturwissenschaften_2004-open-access.pdfThis is the post-refereed version of the manuscript in open accessAuthor postprint72.35 kBView/Open

Bookmark and Share SFX Query

All documents in ORBi are protected by a user license.