Molecular insights into the historic demography of bowhead whales: understanding the evolutionary basis of contemporary management practices
Patterns of genetic variation observed within species reflect evolutionary histories that include signatures of past demography. Understanding the demographic component of species' history is fundamental to informed management because changes in effective population size affect response to envi...
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ftpubmed:oai:pubmedcentral.nih.gov:3568839 2023-05-15T15:11:22+02:00 Molecular insights into the historic demography of bowhead whales: understanding the evolutionary basis of contemporary management practices Phillips, C D Hoffman, J I George, J C Suydam, R S Huebinger, R M Patton, J C Bickham, J W 2013-01 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3568839 http://www.ncbi.nlm.nih.gov/pubmed/23403722 https://doi.org/10.1002/ece3.374 en eng Blackwell Publishing Ltd http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3568839 http://www.ncbi.nlm.nih.gov/pubmed/23403722 http://dx.doi.org/10.1002/ece3.374 © 2013 Published by Blackwell Publishing Ltd. http://creativecommons.org/licenses/by/2.5/ Re-use of this article is permitted in accordance with the Creative Commons Deed, Attribution 2.5, which does not permit commercial exploitation. CC-BY Original Research Text 2013 ftpubmed https://doi.org/10.1002/ece3.374 2013-09-04T19:39:58Z Patterns of genetic variation observed within species reflect evolutionary histories that include signatures of past demography. Understanding the demographic component of species' history is fundamental to informed management because changes in effective population size affect response to environmental change and evolvability, the strength of genetic drift, and maintenance of genetic variability. Species experiencing anthropogenic population reductions provide valuable case studies for understanding the genetic response to demographic change because historic changes in the census size are often well documented. A classic example is the bowhead whale, Balaena mysticetus, which experienced dramatic population depletion due to commercial whaling in the late 19th and early 20th centuries. Consequently, we analyzed a large multi-marker dataset of bowhead whales using a variety of analytical methods, including extended Bayesian skyline analysis and approximate Bayesian computation, to characterize genetic signatures of both ancient and contemporary demographic histories. No genetic signature of recent population depletion was recovered through any analysis incorporating realistic mutation assumptions, probably due to the combined influences of long generation time, short bottleneck duration, and the magnitude of population depletion. In contrast, a robust signal of population expansion was detected around 70,000 years ago, followed by a population decline around 15,000 years ago. The timing of these events coincides to a historic glacial period and the onset of warming at the end of the last glacial maximum, respectively. By implication, climate driven long-term variation in Arctic Ocean productivity, rather than recent anthropogenic disturbance, appears to have been the primary driver of historic bowhead whale demography. Text Arctic Arctic Ocean Balaena mysticetus bowhead whale PubMed Central (PMC) Arctic Arctic Ocean Ecology and Evolution 3 1 18 37 |
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Original Research Phillips, C D Hoffman, J I George, J C Suydam, R S Huebinger, R M Patton, J C Bickham, J W Molecular insights into the historic demography of bowhead whales: understanding the evolutionary basis of contemporary management practices |
topic_facet |
Original Research |
description |
Patterns of genetic variation observed within species reflect evolutionary histories that include signatures of past demography. Understanding the demographic component of species' history is fundamental to informed management because changes in effective population size affect response to environmental change and evolvability, the strength of genetic drift, and maintenance of genetic variability. Species experiencing anthropogenic population reductions provide valuable case studies for understanding the genetic response to demographic change because historic changes in the census size are often well documented. A classic example is the bowhead whale, Balaena mysticetus, which experienced dramatic population depletion due to commercial whaling in the late 19th and early 20th centuries. Consequently, we analyzed a large multi-marker dataset of bowhead whales using a variety of analytical methods, including extended Bayesian skyline analysis and approximate Bayesian computation, to characterize genetic signatures of both ancient and contemporary demographic histories. No genetic signature of recent population depletion was recovered through any analysis incorporating realistic mutation assumptions, probably due to the combined influences of long generation time, short bottleneck duration, and the magnitude of population depletion. In contrast, a robust signal of population expansion was detected around 70,000 years ago, followed by a population decline around 15,000 years ago. The timing of these events coincides to a historic glacial period and the onset of warming at the end of the last glacial maximum, respectively. By implication, climate driven long-term variation in Arctic Ocean productivity, rather than recent anthropogenic disturbance, appears to have been the primary driver of historic bowhead whale demography. |
format |
Text |
author |
Phillips, C D Hoffman, J I George, J C Suydam, R S Huebinger, R M Patton, J C Bickham, J W |
author_facet |
Phillips, C D Hoffman, J I George, J C Suydam, R S Huebinger, R M Patton, J C Bickham, J W |
author_sort |
Phillips, C D |
title |
Molecular insights into the historic demography of bowhead whales: understanding the evolutionary basis of contemporary management practices |
title_short |
Molecular insights into the historic demography of bowhead whales: understanding the evolutionary basis of contemporary management practices |
title_full |
Molecular insights into the historic demography of bowhead whales: understanding the evolutionary basis of contemporary management practices |
title_fullStr |
Molecular insights into the historic demography of bowhead whales: understanding the evolutionary basis of contemporary management practices |
title_full_unstemmed |
Molecular insights into the historic demography of bowhead whales: understanding the evolutionary basis of contemporary management practices |
title_sort |
molecular insights into the historic demography of bowhead whales: understanding the evolutionary basis of contemporary management practices |
publisher |
Blackwell Publishing Ltd |
publishDate |
2013 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3568839 http://www.ncbi.nlm.nih.gov/pubmed/23403722 https://doi.org/10.1002/ece3.374 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Balaena mysticetus bowhead whale |
genre_facet |
Arctic Arctic Ocean Balaena mysticetus bowhead whale |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3568839 http://www.ncbi.nlm.nih.gov/pubmed/23403722 http://dx.doi.org/10.1002/ece3.374 |
op_rights |
© 2013 Published by Blackwell Publishing Ltd. http://creativecommons.org/licenses/by/2.5/ Re-use of this article is permitted in accordance with the Creative Commons Deed, Attribution 2.5, which does not permit commercial exploitation. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1002/ece3.374 |
container_title |
Ecology and Evolution |
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3 |
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1 |
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18 |
op_container_end_page |
37 |
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1766342226337595392 |