# From genes to ecosystems, adaptation of introduced salmonids to a changing sub-Antarctic environment

Jacques Labonne, Philippe Gaudin, Andrew P. Hendry, Lucie Marandel, Stéphane Panserat, Jean-Marc Roussel

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Jacques Labonne, Philippe Gaudin, Andrew P. Hendry, Lucie Marandel, Stéphane Panserat, et al. From genes to ecosystems, adaptation of introduced salmonids to a changing sub-Antarctic environment. 12. SCAR Biology Symposium, Jul 2017, Leuven, Belgium. 512 p., 2017, Book of abstracts. 12. SCAR Biology Symposium. hal-01608746

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BOOK OF ABSTRACTS
XIIth SCAR BIOLOGY
SYMPOSIUM

LEUVEN, BELGIUM
10-14 JULY 2017
This publication should be quoted as follows:

Anton Van de Putte (Ed.). 2017. Book of abstracts: XIIth SCAR Biology Symposium. Leuven, Belgium, 10-14 July 2017. Scientific Committee on Antarctic Research (SCAR), Cambridge, United Kingdom. 512 pp.

Scientific Committee on Antarctic Research
Polar Research Institute
Lensfield Road
UK - CB2 1ER Cambridge
T: +44 (0)1223 336 550
E: info@scar.org
www.scar.org

The abstracts in this book are published on the basis of the information submitted by the respective authors. The publisher and editors cannot be held responsible for errors or any consequences arising from the use of information contained in this book of abstracts. Reproduction is authorized, provided that appropriate mention is made of the source.

*This book has been finalized on 30 June 2017. Any changes after this date have not been adapted.*
From genes to ecosystems, adaptation of introduced salmonids to a
changing sub-Antarctic environment.

Labonne Jacques<fnref n="1" />, Philippe Gaudin<fnref n="1" />, Andrew P. Hendry<fnref n="2" />, Lucie Marandel<fnref n="3" />, Stéphane Panserat<fnref n="3" /> and Jean-Marc Roussel<fnref n="4" />

Polar regions undergo rapid changes to which both native and non-native species must adapt. Long
term and well documented monitorings are paramount to understand the various processes and
scales that participates to adaptation. The case of introduced salmonids to sub-Antarctic Kerguelen
islands offers a rare opportunity to envision adaptation at these various scales. Our monitoring
encompasses 8 introduced salmonid species over five decades and tenths of hydrosystems. Some of
these species did not adapt, some managed to persist, and some thrived. We here give a report of
these different outcomes in relationship with their introduction conditions (numbers, stages,
origins, genetic diversity). We then browse a panel of recent or ongoing research, picturing how
adaptation processes may be investigated through different scales, taking the brown trout as the
model species. At the genes level, we seek footprints of selection on the colonization front by
monitoring heterozygosity fitness relationships generation after generation, in populations where
genetic variation is minimal. At the organism level, we show plastic behavioural adaptation in terms
of feeding to these trophically limiting environments. At the population level, we investigate the
temporal and spatial environmental aspects that trigger and facilitate colonization of virgin habitats
throughout the archipelago. And at the ecosystem level, we investigate how fish may impact their
new environment, and how in turn they may be used as markers of environmental change driven by
other species, and how strong is this current change. We finish by underlining connexions between
these processes and scales, their role in the dynamics of diversity, and by identifying the potential
of our findings for other rapidly changing polar regions.

<footnote n="1">¹ UMR ECOBIOP 1224 INRA/UPPA, Aquapole INRA, Quartier Ibarron, 64310 Saint-Pée sur Nivelle, France
E-mail: jacques.labonne@inra.fr</footnote>

<footnote n="2">² Redpath Museum and Department of Biology, McGill University, Montreal, QC, Canada</footnote>

<footnote n="3">³ UMR NUMEA 1419 INRA/UPPA, Aquapole INRA, Quartier Ibarron, 64310 Saint-Pée sur Nivelle, France</footnote>

<footnote n="4">⁴ UMR ESE 985 INRA/Agrocampus Ouest, F-35042 Rennes, France</footnote>