Morphological diversification of the endemic Antarctic fishes Trematominae (Notothenioidei, Teleostei)

Frederich, Bruno; Heindler, Franz Maximilian; Christiansen, Henrik; Dettai, Agnès; Lepoint, Gilles

Reference : Morphological diversification of the endemic Antarctic fishes Trematominae (Nototheni...


	Document type :	Scientific congresses and symposiums : Poster
	Discipline(s) :	Life sciences : Environmental sciences & ecology Life sciences : Zoology Life sciences : Aquatic sciences & oceanology
	To cite this reference:	http://hdl.handle.net/2268/216264

Title :	Morphological diversification of the endemic Antarctic fishes Trematominae (Notothenioidei, Teleostei)
Language :	English
Author, co-author :	Frederich, Bruno [Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Océanographie biologique >]
	Heindler, Franz Maximilian [Katholieke Universiteit Leuven - KUL > > Laboratory of Biodiversity and Evolutionary Genomics > >]
	Christiansen, Henrik [Katholieke Universiteit Leuven - KUL > > Laboratory of Biodiversity and Evolutionary Genomics > >]
	Dettai, Agnès [Muséum National d’Histoire Naturelle, Paris > Département Systématique et Evolution > UMR 7138 > >]
	Lepoint, Gilles [Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Océanographie biologique >]
Publication date :	23-Nov-2017
Page number :	A0
Peer reviewed :	No
On invitation :	No
Audience :	International
Event name :	ZOOLOGY 2017 - 25th Benelux congress of Zoology
Event date :	du 23 novembre au 24 novembre 2017
Event organizer :	Royal Dutch Zoological Society
	Royal Belgian Zoological Society
Event place (city) :	Wageningen
Event country :	Pays-Bas
Keywords :	[en] geometric morphology ; fish ; antarctic ; evolution ; global change ; trophic ecology
Abstract :	[en] Adaptive radiation involves the early, rapid ecological and morphological diversification of multiple lineages from a common ancestor into new, diverging adaptive zones. Regarding this definition with emphasis on the tempo of diversification, Antarctic notothenioids represent one of the very few examples of adaptive radiation in marine fishes. Time-calibrated phylogenies suggest that the diversification of most speciose notothenioid lineages occured between 20 and 15 Ma. The subfamily Trematominae is one of those diverse subclades showing a large range of ecological niches. In the present study, we aim to describe the evolutionary history of Trematomus species. By combining a consensus time-tree and a geometric morphometric dataset, we first illustrate their pattern of cephalic shape diversification in a phylomorphospace and we infer the morphology of their common ancestor. We also explore whether the cephalic shape data shows a phylogenetic signal, which is defined as the statistical dependence among species trait values due to their phylogenetic relatedness. The combination of phylogenetic signal test and exploration of the phylomorphospace allows us to assess whether Trematomus rapidly diverged in various adaptive zones as expected under a classic scenario of adaptive radiation.
Research centres :	Freshwater and OCeanic science Unit of reSearch - FOCUS ; Centre Interfacultaire de Recherches en Océanologie - MARE
Funders :	Politique Scientifique Fédérale (Belgique) = Belgian Federal Science Policy
Name of the research project :	Refugia and Ecosystem Tolerance in the Southern Ocean (RECTO)
Target :	Researchers
Permalink :	http://hdl.handle.net/2268/216264

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