Poster (Scientific congresses and symposiums)
Morphological diversification of the endemic Antarctic fishes Trematominae (Notothenioidei, Teleostei)
Frederich, Bruno; Heindler, Franz Maximilian; Christiansen, Henrik et al.
2017ZOOLOGY 2017 - 25th Benelux congress of Zoology
 

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Keywords :
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 center :
FOCUS - Freshwater and OCeanic science Unit of reSearch - ULiège
MARE - Centre Interfacultaire de Recherches en Océanologie - ULiège
Disciplines :
Environmental sciences & ecology
Aquatic sciences & oceanology
Zoology
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
Language :
English
Title :
Morphological diversification of the endemic Antarctic fishes Trematominae (Notothenioidei, Teleostei)
Publication date :
23 November 2017
Number of pages :
A0
Event name :
ZOOLOGY 2017 - 25th Benelux congress of Zoology
Event organizer :
Royal Dutch Zoological Society
Royal Belgian Zoological Society
Event place :
Wageningen, Netherlands
Event date :
du 23 novembre au 24 novembre 2017
Audience :
International
Name of the research project :
Refugia and Ecosystem Tolerance in the Southern Ocean (RECTO)
Funders :
BELSPO - SPP Politique scientifique - Service Public Fédéral de Programmation Politique scientifique
Available on ORBi :
since 21 November 2017

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