Prey differences drive local genetic adaptation in Antarctic fur seals
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 differenc...
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Online Access: | http://hdl.handle.net/2263/77142 https://doi.org/10.3354/meps13108 |
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ftunivpretoria:oai:repository.up.ac.za:2263/77142 2023-05-15T13:59:45+02:00 Prey differences drive local genetic adaptation in Antarctic fur seals Cleary, Alison C. Bester, Marthan Nieuwoudt Forcada, Jaume Goebel, Michael Goldsworthy, Simon D. Guinet, Christopher Hoffman, Joseph I. Kovacs, Kit M. Lydersen, Christian Lowther, Andrew D. 2019-10 http://hdl.handle.net/2263/77142 https://doi.org/10.3354/meps13108 en eng Inter Research http://hdl.handle.net/2263/77142 Cleary, A.C., Bester, M., Forcada, J. et al. 2019, 'Prey differences drive local genetic adaptation in Antarctic fur seals', Marine Ecology Progress Series, 628. 195-209. https://doi.org/10.3354/meps13108. 0171-8630 (print) 1616-1599 (online) doi:10.3354/meps13108 © Inter-Research 2020 Antarctic fur seal (Arctocephalus gazella) Prey differences Double digest restriction-site associated DNA (ddRAD) Diet Euphausia superba Natural selection Postprint Article 2019 ftunivpretoria https://doi.org/10.3354/meps13108 2022-05-31T13:15:07Z 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 all 8 of the 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. The Norwegian Antarctic Research Expeditions (NARE) programme http://www.int-res.com/journals/meps/meps-home hj2020 Mammal Research Institute Article in Journal/Newspaper Antarc* Antarctic Antarctic Fur Seal Antarctic Fur Seals Arctocephalus gazella Euphausia superba University of Pretoria: UPSpace Antarctic Marine Ecology Progress Series 628 195 209 |
institution |
Open Polar |
collection |
University of Pretoria: UPSpace |
op_collection_id |
ftunivpretoria |
language |
English |
topic |
Antarctic fur seal (Arctocephalus gazella) Prey differences Double digest restriction-site associated DNA (ddRAD) Diet Euphausia superba Natural selection |
spellingShingle |
Antarctic fur seal (Arctocephalus gazella) Prey differences Double digest restriction-site associated DNA (ddRAD) Diet Euphausia superba Natural selection Cleary, Alison C. Bester, Marthan Nieuwoudt Forcada, Jaume Goebel, Michael Goldsworthy, Simon D. Guinet, Christopher Hoffman, Joseph I. Kovacs, Kit M. Lydersen, Christian Lowther, Andrew D. Prey differences drive local genetic adaptation in Antarctic fur seals |
topic_facet |
Antarctic fur seal (Arctocephalus gazella) Prey differences Double digest restriction-site associated DNA (ddRAD) Diet Euphausia superba Natural selection |
description |
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 all 8 of the 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. The Norwegian Antarctic Research Expeditions (NARE) programme http://www.int-res.com/journals/meps/meps-home hj2020 Mammal Research Institute |
format |
Article in Journal/Newspaper |
author |
Cleary, Alison C. Bester, Marthan Nieuwoudt Forcada, Jaume Goebel, Michael Goldsworthy, Simon D. Guinet, Christopher Hoffman, Joseph I. Kovacs, Kit M. Lydersen, Christian Lowther, Andrew D. |
author_facet |
Cleary, Alison C. Bester, Marthan Nieuwoudt Forcada, Jaume Goebel, Michael Goldsworthy, Simon D. Guinet, Christopher Hoffman, Joseph I. Kovacs, Kit M. Lydersen, Christian Lowther, Andrew D. |
author_sort |
Cleary, Alison C. |
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 |
Inter Research |
publishDate |
2019 |
url |
http://hdl.handle.net/2263/77142 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_relation |
http://hdl.handle.net/2263/77142 Cleary, A.C., Bester, M., Forcada, J. et al. 2019, 'Prey differences drive local genetic adaptation in Antarctic fur seals', Marine Ecology Progress Series, 628. 195-209. https://doi.org/10.3354/meps13108. 0171-8630 (print) 1616-1599 (online) doi:10.3354/meps13108 |
op_rights |
© Inter-Research 2020 |
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_ |
1766268512510148608 |