Data from: What influences the worldwide genetic structure of sperm whales (Physeter macrocephalus)?
The interplay of natural selection and genetic drift, influenced by geographic isolation, mating systems and population size, determines patterns of genetic diversity within species. The sperm whale provides an interesting example of a long-lived species with few geographic barriers to dispersal. Wo...
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ftdryad:oai:v1.datadryad.org:10255/dryad.112408 2023-05-15T17:59:27+02:00 Data from: What influences the worldwide genetic structure of sperm whales (Physeter macrocephalus)? Alexander, Alana Steel, Debbie Hoekzema, Kendra Mesnick, Sarah L. Engelhaupt, Daniel Kerr, Iain Payne, Roger Baker, Charles Scott Atlantic Ocean Pacific Ocean Indian Ocean 1994-2008 2016-04-04T15:57:06Z http://hdl.handle.net/10255/dryad.112408 https://doi.org/10.5061/dryad.2q4r0 unknown doi:10.5061/dryad.2q4r0/1 doi:10.1111/mec.13638 PMID:27037911 doi:10.5061/dryad.2q4r0 Alexander A, Steel D, Hoekzema K, Mesnick SL, Engelhaupt D, Kerr I, Payne R, Baker CS (2016) What influences the worldwide genetic structure of sperm whales (Physeter macrocephalus)? Molecular Ecology 25(12): 2754–2772. http://hdl.handle.net/10255/dryad.112408 Population Genetics - Empirical Sex-biased dispersal mtDNA Microsatellite genotypes Cetacea population expansion Article 2016 ftdryad https://doi.org/10.5061/dryad.2q4r0 https://doi.org/10.5061/dryad.2q4r0/1 https://doi.org/10.1111/mec.13638 2020-01-01T15:32:55Z The interplay of natural selection and genetic drift, influenced by geographic isolation, mating systems and population size, determines patterns of genetic diversity within species. The sperm whale provides an interesting example of a long-lived species with few geographic barriers to dispersal. Worldwide mtDNA diversity is relatively low, but highly structured among geographic regions and social groups, attributed to female philopatry. However, it is unclear whether this female philopatry is due to geographic regions or social groups, or how this might vary on a worldwide scale. To answer these questions, we combined mtDNA information for 1091 previously published samples with 542 newly obtained DNA profiles (394-bp mtDNA, sex, 13 microsatellites) including the previously unsampled Indian Ocean, and social group information for 541 individuals. We found low mtDNA diversity (π = 0.430%) reflecting an expansion event <80 000 years bp, but strong differentiation by ocean, among regions within some oceans, and among social groups. In comparison, microsatellite differentiation was low at all levels, presumably due to male-mediated gene flow. A hierarchical amova showed that regions were important for explaining mtDNA variance in the Indian Ocean, but not Pacific, with social group sampling in the Atlantic too limited to include in analyses. Social groups were important in partitioning mtDNA and microsatellite variance within both oceans. Therefore, both geographic philopatry and social philopatry influence genetic structure in the sperm whale, but their relative importance differs by sex and ocean, reflecting breeding behaviour, geographic features and perhaps a more recent origin of sperm whales in the Pacific. By investigating the interplay of evolutionary forces operating at different temporal and geographic scales, we show that sperm whales are perhaps a unique example of a worldwide population expansion followed by rapid assortment due to female social organization. Article in Journal/Newspaper Physeter macrocephalus Sperm whale Dryad Digital Repository (Duke University) Indian Pacific |
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Open Polar |
collection |
Dryad Digital Repository (Duke University) |
op_collection_id |
ftdryad |
language |
unknown |
topic |
Population Genetics - Empirical Sex-biased dispersal mtDNA Microsatellite genotypes Cetacea population expansion |
spellingShingle |
Population Genetics - Empirical Sex-biased dispersal mtDNA Microsatellite genotypes Cetacea population expansion Alexander, Alana Steel, Debbie Hoekzema, Kendra Mesnick, Sarah L. Engelhaupt, Daniel Kerr, Iain Payne, Roger Baker, Charles Scott Data from: What influences the worldwide genetic structure of sperm whales (Physeter macrocephalus)? |
topic_facet |
Population Genetics - Empirical Sex-biased dispersal mtDNA Microsatellite genotypes Cetacea population expansion |
description |
The interplay of natural selection and genetic drift, influenced by geographic isolation, mating systems and population size, determines patterns of genetic diversity within species. The sperm whale provides an interesting example of a long-lived species with few geographic barriers to dispersal. Worldwide mtDNA diversity is relatively low, but highly structured among geographic regions and social groups, attributed to female philopatry. However, it is unclear whether this female philopatry is due to geographic regions or social groups, or how this might vary on a worldwide scale. To answer these questions, we combined mtDNA information for 1091 previously published samples with 542 newly obtained DNA profiles (394-bp mtDNA, sex, 13 microsatellites) including the previously unsampled Indian Ocean, and social group information for 541 individuals. We found low mtDNA diversity (π = 0.430%) reflecting an expansion event <80 000 years bp, but strong differentiation by ocean, among regions within some oceans, and among social groups. In comparison, microsatellite differentiation was low at all levels, presumably due to male-mediated gene flow. A hierarchical amova showed that regions were important for explaining mtDNA variance in the Indian Ocean, but not Pacific, with social group sampling in the Atlantic too limited to include in analyses. Social groups were important in partitioning mtDNA and microsatellite variance within both oceans. Therefore, both geographic philopatry and social philopatry influence genetic structure in the sperm whale, but their relative importance differs by sex and ocean, reflecting breeding behaviour, geographic features and perhaps a more recent origin of sperm whales in the Pacific. By investigating the interplay of evolutionary forces operating at different temporal and geographic scales, we show that sperm whales are perhaps a unique example of a worldwide population expansion followed by rapid assortment due to female social organization. |
format |
Article in Journal/Newspaper |
author |
Alexander, Alana Steel, Debbie Hoekzema, Kendra Mesnick, Sarah L. Engelhaupt, Daniel Kerr, Iain Payne, Roger Baker, Charles Scott |
author_facet |
Alexander, Alana Steel, Debbie Hoekzema, Kendra Mesnick, Sarah L. Engelhaupt, Daniel Kerr, Iain Payne, Roger Baker, Charles Scott |
author_sort |
Alexander, Alana |
title |
Data from: What influences the worldwide genetic structure of sperm whales (Physeter macrocephalus)? |
title_short |
Data from: What influences the worldwide genetic structure of sperm whales (Physeter macrocephalus)? |
title_full |
Data from: What influences the worldwide genetic structure of sperm whales (Physeter macrocephalus)? |
title_fullStr |
Data from: What influences the worldwide genetic structure of sperm whales (Physeter macrocephalus)? |
title_full_unstemmed |
Data from: What influences the worldwide genetic structure of sperm whales (Physeter macrocephalus)? |
title_sort |
data from: what influences the worldwide genetic structure of sperm whales (physeter macrocephalus)? |
publishDate |
2016 |
url |
http://hdl.handle.net/10255/dryad.112408 https://doi.org/10.5061/dryad.2q4r0 |
op_coverage |
Atlantic Ocean Pacific Ocean Indian Ocean 1994-2008 |
geographic |
Indian Pacific |
geographic_facet |
Indian Pacific |
genre |
Physeter macrocephalus Sperm whale |
genre_facet |
Physeter macrocephalus Sperm whale |
op_relation |
doi:10.5061/dryad.2q4r0/1 doi:10.1111/mec.13638 PMID:27037911 doi:10.5061/dryad.2q4r0 Alexander A, Steel D, Hoekzema K, Mesnick SL, Engelhaupt D, Kerr I, Payne R, Baker CS (2016) What influences the worldwide genetic structure of sperm whales (Physeter macrocephalus)? Molecular Ecology 25(12): 2754–2772. http://hdl.handle.net/10255/dryad.112408 |
op_doi |
https://doi.org/10.5061/dryad.2q4r0 https://doi.org/10.5061/dryad.2q4r0/1 https://doi.org/10.1111/mec.13638 |
_version_ |
1766168274528108544 |