An integrated approach to historical population assessment of the great whales: case of the New Zealand southern right whale
Accurate estimation of historical abundance provides an essential baseline for judging the recovery of the great whales. This is particularly challenging for whales hunted prior to twentieth century modern whaling, as population-level catch records are often incomplete. Assessments of whale recovery...
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crroyalsociety:10.1098/rsos.150669 2024-06-02T08:14:51+00:00 An integrated approach to historical population assessment of the great whales: case of the New Zealand southern right whale Jackson, Jennifer A. Carroll, Emma L. Smith, Tim D. Zerbini, Alexandre N. Patenaude, Nathalie J. Baker, C. Scott New Zealand Ministry of Fisheries Royal Society of New Zealand 2016 http://dx.doi.org/10.1098/rsos.150669 https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.150669 https://royalsocietypublishing.org/doi/full-xml/10.1098/rsos.150669 en eng The Royal Society https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ Royal Society Open Science volume 3, issue 3, page 150669 ISSN 2054-5703 journal-article 2016 crroyalsociety https://doi.org/10.1098/rsos.150669 2024-05-07T14:16:34Z Accurate estimation of historical abundance provides an essential baseline for judging the recovery of the great whales. This is particularly challenging for whales hunted prior to twentieth century modern whaling, as population-level catch records are often incomplete. Assessments of whale recovery using pre-modern exploitation indices are therefore rare, despite the intensive, global nature of nineteenth century whaling. Right whales ( Eubalaena spp.) were particularly exploited: slow swimmers with strong fidelity to sheltered calving bays, the species made predictable and easy targets. Here, we present the first integrated population-level assessment of the whaling impact and pre-exploitation abundance of a right whale, the New Zealand southern right whale ( E. australis ). In this assessment, we use a Bayesian population dynamics model integrating multiple data sources: nineteenth century catches, genetic constraints on bottleneck size and individual sightings histories informing abundance and trend. Different catch allocation scenarios are explored to account for uncertainty in the population's offshore distribution. From a pre-exploitation abundance of 28 800–47 100 whales, nineteenth century hunting reduced the population to approximately 30–40 mature females between 1914 and 1926. Today, it stands at less than 12% of pre-exploitation abundance. Despite the challenges of reconstructing historical catches and population boundaries, conservation efforts of historically exploited species benefit from targets for ecological restoration. Article in Journal/Newspaper Southern Right Whale The Royal Society New Zealand Royal Society Open Science 3 3 150669 |
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The Royal Society |
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crroyalsociety |
language |
English |
description |
Accurate estimation of historical abundance provides an essential baseline for judging the recovery of the great whales. This is particularly challenging for whales hunted prior to twentieth century modern whaling, as population-level catch records are often incomplete. Assessments of whale recovery using pre-modern exploitation indices are therefore rare, despite the intensive, global nature of nineteenth century whaling. Right whales ( Eubalaena spp.) were particularly exploited: slow swimmers with strong fidelity to sheltered calving bays, the species made predictable and easy targets. Here, we present the first integrated population-level assessment of the whaling impact and pre-exploitation abundance of a right whale, the New Zealand southern right whale ( E. australis ). In this assessment, we use a Bayesian population dynamics model integrating multiple data sources: nineteenth century catches, genetic constraints on bottleneck size and individual sightings histories informing abundance and trend. Different catch allocation scenarios are explored to account for uncertainty in the population's offshore distribution. From a pre-exploitation abundance of 28 800–47 100 whales, nineteenth century hunting reduced the population to approximately 30–40 mature females between 1914 and 1926. Today, it stands at less than 12% of pre-exploitation abundance. Despite the challenges of reconstructing historical catches and population boundaries, conservation efforts of historically exploited species benefit from targets for ecological restoration. |
author2 |
New Zealand Ministry of Fisheries Royal Society of New Zealand |
format |
Article in Journal/Newspaper |
author |
Jackson, Jennifer A. Carroll, Emma L. Smith, Tim D. Zerbini, Alexandre N. Patenaude, Nathalie J. Baker, C. Scott |
spellingShingle |
Jackson, Jennifer A. Carroll, Emma L. Smith, Tim D. Zerbini, Alexandre N. Patenaude, Nathalie J. Baker, C. Scott An integrated approach to historical population assessment of the great whales: case of the New Zealand southern right whale |
author_facet |
Jackson, Jennifer A. Carroll, Emma L. Smith, Tim D. Zerbini, Alexandre N. Patenaude, Nathalie J. Baker, C. Scott |
author_sort |
Jackson, Jennifer A. |
title |
An integrated approach to historical population assessment of the great whales: case of the New Zealand southern right whale |
title_short |
An integrated approach to historical population assessment of the great whales: case of the New Zealand southern right whale |
title_full |
An integrated approach to historical population assessment of the great whales: case of the New Zealand southern right whale |
title_fullStr |
An integrated approach to historical population assessment of the great whales: case of the New Zealand southern right whale |
title_full_unstemmed |
An integrated approach to historical population assessment of the great whales: case of the New Zealand southern right whale |
title_sort |
integrated approach to historical population assessment of the great whales: case of the new zealand southern right whale |
publisher |
The Royal Society |
publishDate |
2016 |
url |
http://dx.doi.org/10.1098/rsos.150669 https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.150669 https://royalsocietypublishing.org/doi/full-xml/10.1098/rsos.150669 |
geographic |
New Zealand |
geographic_facet |
New Zealand |
genre |
Southern Right Whale |
genre_facet |
Southern Right Whale |
op_source |
Royal Society Open Science volume 3, issue 3, page 150669 ISSN 2054-5703 |
op_rights |
https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ |
op_doi |
https://doi.org/10.1098/rsos.150669 |
container_title |
Royal Society Open Science |
container_volume |
3 |
container_issue |
3 |
container_start_page |
150669 |
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1800738835568525312 |