Detecting population trends for US marine mammals
Abstract Trend analysis can provide valuable information about marine mammal population dynamics, potentially revealing the influence of environmental factors and inform conservation and management decisions. We reviewed the marine mammal stock assessment reports (SARs) published by the US National...
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crwiley:10.1111/csp2.611 2024-04-21T07:58:28+00:00 Detecting population trends for US marine mammals White, Easton R. Schakner, Zachary Bellamy, Amber Srinivasan, Mridula 2022 http://dx.doi.org/10.1111/csp2.611 https://onlinelibrary.wiley.com/doi/pdf/10.1111/csp2.611 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/csp2.611 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Conservation Science and Practice volume 4, issue 3 ISSN 2578-4854 2578-4854 Nature and Landscape Conservation Environmental Science (miscellaneous) Ecology Global and Planetary Change journal-article 2022 crwiley https://doi.org/10.1111/csp2.611 2024-03-28T08:31:28Z Abstract Trend analysis can provide valuable information about marine mammal population dynamics, potentially revealing the influence of environmental factors and inform conservation and management decisions. We reviewed the marine mammal stock assessment reports (SARs) published by the US National Marine Fisheries Service and found that 80% of the selected 244 marine mammal stocks with SARs lack assessment for trends in population abundance. We compared trend analysis with another common management tool, potential biological removal (PBR), a measure of the maximum human‐caused mortality that can still result in positive population growth. We found that, generally, estimates of PBR were lower for declining stocks than for increasing or stable stocks and varied by life history characteristics. As a case study, we used a resampling approach on three well‐studied stocks, killer whale ( Orcinus orca —Northern Resident), beluga ( Delphinapterus leucas —Cook Inlet), and humpback whale ( Megaptera novaeangliae —CA/OR/WA), to test the minimal amount of time and sampling necessary to detect population trends with high statistical power. We found seven sampling events over more than 10 years were needed for a high statistical power level for all three stocks. Altogether, these findings suggest that well‐studied stocks can provide crucial information on the statistical requirements for detecting trends. Furthermore, our proposed resampling approach might enable more frequent trend analysis, even with limited time series available for many stocks. Article in Journal/Newspaper Beluga Beluga* Delphinapterus leucas Humpback Whale Killer Whale Megaptera novaeangliae Orca Orcinus orca Killer whale Wiley Online Library Conservation Science and Practice 4 3 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
topic |
Nature and Landscape Conservation Environmental Science (miscellaneous) Ecology Global and Planetary Change |
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Nature and Landscape Conservation Environmental Science (miscellaneous) Ecology Global and Planetary Change White, Easton R. Schakner, Zachary Bellamy, Amber Srinivasan, Mridula Detecting population trends for US marine mammals |
topic_facet |
Nature and Landscape Conservation Environmental Science (miscellaneous) Ecology Global and Planetary Change |
description |
Abstract Trend analysis can provide valuable information about marine mammal population dynamics, potentially revealing the influence of environmental factors and inform conservation and management decisions. We reviewed the marine mammal stock assessment reports (SARs) published by the US National Marine Fisheries Service and found that 80% of the selected 244 marine mammal stocks with SARs lack assessment for trends in population abundance. We compared trend analysis with another common management tool, potential biological removal (PBR), a measure of the maximum human‐caused mortality that can still result in positive population growth. We found that, generally, estimates of PBR were lower for declining stocks than for increasing or stable stocks and varied by life history characteristics. As a case study, we used a resampling approach on three well‐studied stocks, killer whale ( Orcinus orca —Northern Resident), beluga ( Delphinapterus leucas —Cook Inlet), and humpback whale ( Megaptera novaeangliae —CA/OR/WA), to test the minimal amount of time and sampling necessary to detect population trends with high statistical power. We found seven sampling events over more than 10 years were needed for a high statistical power level for all three stocks. Altogether, these findings suggest that well‐studied stocks can provide crucial information on the statistical requirements for detecting trends. Furthermore, our proposed resampling approach might enable more frequent trend analysis, even with limited time series available for many stocks. |
format |
Article in Journal/Newspaper |
author |
White, Easton R. Schakner, Zachary Bellamy, Amber Srinivasan, Mridula |
author_facet |
White, Easton R. Schakner, Zachary Bellamy, Amber Srinivasan, Mridula |
author_sort |
White, Easton R. |
title |
Detecting population trends for US marine mammals |
title_short |
Detecting population trends for US marine mammals |
title_full |
Detecting population trends for US marine mammals |
title_fullStr |
Detecting population trends for US marine mammals |
title_full_unstemmed |
Detecting population trends for US marine mammals |
title_sort |
detecting population trends for us marine mammals |
publisher |
Wiley |
publishDate |
2022 |
url |
http://dx.doi.org/10.1111/csp2.611 https://onlinelibrary.wiley.com/doi/pdf/10.1111/csp2.611 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/csp2.611 |
genre |
Beluga Beluga* Delphinapterus leucas Humpback Whale Killer Whale Megaptera novaeangliae Orca Orcinus orca Killer whale |
genre_facet |
Beluga Beluga* Delphinapterus leucas Humpback Whale Killer Whale Megaptera novaeangliae Orca Orcinus orca Killer whale |
op_source |
Conservation Science and Practice volume 4, issue 3 ISSN 2578-4854 2578-4854 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1111/csp2.611 |
container_title |
Conservation Science and Practice |
container_volume |
4 |
container_issue |
3 |
_version_ |
1796939602725961728 |