Prey differences drive local genetic adaptation in Antarctic fur seals
International audience Antarctic fur seal (Arctocephalus gazella) colonies are found on sub-Antarctic islands around the continent. These islands experience a range of conditions in terms of physical and biological habitat, creating a natural laboratory to investigate local genetic adaptation. One s...
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Online Access: | https://hal.archives-ouvertes.fr/hal-02746533 https://doi.org/10.3354/meps13108 |
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ftunivnantes:oai:HAL:hal-02746533v1 2023-05-15T13:44:26+02:00 Prey differences drive local genetic adaptation in Antarctic fur seals Cleary, Ac Bester, M. Forcada, J. Goebel, M Goldsworthy, Sd Guinet, C. Hoffman, Ji Kovacs, Km Lydersen, C. Lowther, Ad Department of Zoology and Entomology, Mammal Research Institute University of Pretoria South Africa British Antarctic Survey NERC UK Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) Norwegian Polar Institute 2019-10-10 https://hal.archives-ouvertes.fr/hal-02746533 https://doi.org/10.3354/meps13108 en eng HAL CCSD Inter Research info:eu-repo/semantics/altIdentifier/doi/10.3354/meps13108 hal-02746533 https://hal.archives-ouvertes.fr/hal-02746533 doi:10.3354/meps13108 ISSN: 0171-8630 EISSN: 1616-1599 Marine Ecology Progress Series https://hal.archives-ouvertes.fr/hal-02746533 Marine Ecology Progress Series, 2019, 628, pp.195-209. ⟨10.3354/meps13108⟩ Arctocephalus gazella Double digest restriction-site associated DNA sequencing ddRAD Diet Euphausia superba Natural selection [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2019 ftunivnantes https://doi.org/10.3354/meps13108 2023-01-04T00:00:04Z International audience Antarctic fur seal (Arctocephalus gazella) colonies are found on sub-Antarctic islands around the continent. These islands experience a range of conditions in terms of physical and biological habitat, creating a natural laboratory to investigate local genetic adaptation. One striking habitat difference is in the availability of Euphausia superba krill as prey, which has led to A. gazella exhibiting a range of diets. A. gazella in some colonies consume exclusively krill, while their conspecifics in other colonies feed mainly on fish and consume few to no krill. To investigate potential adaptations to these different prey fields, reduced representation genome sequencing was conducted on A. gazella from the 8 major colonies. Twenty-seven genomic regions exhibiting signatures of natural selection were identified. Two of these genomic regions were clearly associated with seals living in krill-dominated areas or those in fish-dominated areas. Twenty-two additional genomic regions under selection showed a pattern consistent with prey differences as the driver of selection after historical migrations from krill-dominated habitats where lineages evolved to present krill-poor habitat areas were taken into account. Only 1 of the genomic regions identified appeared to be explained by any other environmental variable analysed (depth). Genomic regions under prey-driven selection included genes associated with regulation of gene expression, skeletal development, and lipid metabolism. Adaptation to local prey has implications for spatial management of this species and for the potential impacts of climate- or harvest-driven reductions in krill abundance on these seals. Article in Journal/Newspaper Antarc* Antarctic Antarctic Fur Seal Antarctic Fur Seals Arctocephalus gazella Euphausia superba Université de Nantes: HAL-UNIV-NANTES Antarctic Marine Ecology Progress Series 628 195 209 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
Arctocephalus gazella Double digest restriction-site associated DNA sequencing ddRAD Diet Euphausia superba Natural selection [SDE]Environmental Sciences |
spellingShingle |
Arctocephalus gazella Double digest restriction-site associated DNA sequencing ddRAD Diet Euphausia superba Natural selection [SDE]Environmental Sciences Cleary, Ac Bester, M. Forcada, J. Goebel, M Goldsworthy, Sd Guinet, C. Hoffman, Ji Kovacs, Km Lydersen, C. Lowther, Ad Prey differences drive local genetic adaptation in Antarctic fur seals |
topic_facet |
Arctocephalus gazella Double digest restriction-site associated DNA sequencing ddRAD Diet Euphausia superba Natural selection [SDE]Environmental Sciences |
description |
International audience Antarctic fur seal (Arctocephalus gazella) colonies are found on sub-Antarctic islands around the continent. These islands experience a range of conditions in terms of physical and biological habitat, creating a natural laboratory to investigate local genetic adaptation. One striking habitat difference is in the availability of Euphausia superba krill as prey, which has led to A. gazella exhibiting a range of diets. A. gazella in some colonies consume exclusively krill, while their conspecifics in other colonies feed mainly on fish and consume few to no krill. To investigate potential adaptations to these different prey fields, reduced representation genome sequencing was conducted on A. gazella from the 8 major colonies. Twenty-seven genomic regions exhibiting signatures of natural selection were identified. Two of these genomic regions were clearly associated with seals living in krill-dominated areas or those in fish-dominated areas. Twenty-two additional genomic regions under selection showed a pattern consistent with prey differences as the driver of selection after historical migrations from krill-dominated habitats where lineages evolved to present krill-poor habitat areas were taken into account. Only 1 of the genomic regions identified appeared to be explained by any other environmental variable analysed (depth). Genomic regions under prey-driven selection included genes associated with regulation of gene expression, skeletal development, and lipid metabolism. Adaptation to local prey has implications for spatial management of this species and for the potential impacts of climate- or harvest-driven reductions in krill abundance on these seals. |
author2 |
Department of Zoology and Entomology, Mammal Research Institute University of Pretoria South Africa British Antarctic Survey NERC UK Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) Norwegian Polar Institute |
format |
Article in Journal/Newspaper |
author |
Cleary, Ac Bester, M. Forcada, J. Goebel, M Goldsworthy, Sd Guinet, C. Hoffman, Ji Kovacs, Km Lydersen, C. Lowther, Ad |
author_facet |
Cleary, Ac Bester, M. Forcada, J. Goebel, M Goldsworthy, Sd Guinet, C. Hoffman, Ji Kovacs, Km Lydersen, C. Lowther, Ad |
author_sort |
Cleary, Ac |
title |
Prey differences drive local genetic adaptation in Antarctic fur seals |
title_short |
Prey differences drive local genetic adaptation in Antarctic fur seals |
title_full |
Prey differences drive local genetic adaptation in Antarctic fur seals |
title_fullStr |
Prey differences drive local genetic adaptation in Antarctic fur seals |
title_full_unstemmed |
Prey differences drive local genetic adaptation in Antarctic fur seals |
title_sort |
prey differences drive local genetic adaptation in antarctic fur seals |
publisher |
HAL CCSD |
publishDate |
2019 |
url |
https://hal.archives-ouvertes.fr/hal-02746533 https://doi.org/10.3354/meps13108 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctic Fur Seal Antarctic Fur Seals Arctocephalus gazella Euphausia superba |
genre_facet |
Antarc* Antarctic Antarctic Fur Seal Antarctic Fur Seals Arctocephalus gazella Euphausia superba |
op_source |
ISSN: 0171-8630 EISSN: 1616-1599 Marine Ecology Progress Series https://hal.archives-ouvertes.fr/hal-02746533 Marine Ecology Progress Series, 2019, 628, pp.195-209. ⟨10.3354/meps13108⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3354/meps13108 hal-02746533 https://hal.archives-ouvertes.fr/hal-02746533 doi:10.3354/meps13108 |
op_doi |
https://doi.org/10.3354/meps13108 |
container_title |
Marine Ecology Progress Series |
container_volume |
628 |
container_start_page |
195 |
op_container_end_page |
209 |
_version_ |
1766201539932717056 |