Table_1_The Rapid Population Collapse of a Key Marine Predator in the Northern Antarctic Peninsula Endangers Genetic Diversity and Resilience to Climate Change.docx
Antarctic fur seals (AFS) are an ecologically important predator and a focal indicator species for ecosystem-based Antarctic fisheries management. This species suffered intensive anthropogenic exploitation until the early 1900s, but recolonized most of its former distribution, including the southern...
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ftfrontimediafig:oai:figshare.com:article/17713520 2023-05-15T13:43:30+02:00 Table_1_The Rapid Population Collapse of a Key Marine Predator in the Northern Antarctic Peninsula Endangers Genetic Diversity and Resilience to Climate Change.docx Douglas J. Krause Carolina A. Bonin Michael E. Goebel Christian S. Reiss George M. Watters 2022-01-03T04:49:29Z https://doi.org/10.3389/fmars.2021.796488.s001 https://figshare.com/articles/dataset/Table_1_The_Rapid_Population_Collapse_of_a_Key_Marine_Predator_in_the_Northern_Antarctic_Peninsula_Endangers_Genetic_Diversity_and_Resilience_to_Climate_Change_docx/17713520 unknown doi:10.3389/fmars.2021.796488.s001 https://figshare.com/articles/dataset/Table_1_The_Rapid_Population_Collapse_of_a_Key_Marine_Predator_in_the_Northern_Antarctic_Peninsula_Endangers_Genetic_Diversity_and_Resilience_to_Climate_Change_docx/17713520 CC BY 4.0 CC-BY Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering Antarctic fur seal conservation status South Shetland Islands top-down and bottom-up control edge population Arctocephalus gazella population dynamics (ecology) Dataset 2022 ftfrontimediafig https://doi.org/10.3389/fmars.2021.796488.s001 2022-01-06T00:04:47Z Antarctic fur seals (AFS) are an ecologically important predator and a focal indicator species for ecosystem-based Antarctic fisheries management. This species suffered intensive anthropogenic exploitation until the early 1900s, but recolonized most of its former distribution, including the southern-most colony at Cape Shirreff, South Shetland Islands (SSI). The IUCN describes a single, global AFS population of least concern; however, extensive genetic analyses clearly identify four distinct breeding stocks, including one in the SSI. To update the population status of SSI AFS, we analyzed 20 years of field-based data including population counts, body size and condition, natality, recruitment, foraging behaviors, return rates, and pup mortality at the largest SSI colony. Our findings show a precipitous decline in AFS abundance (86% decrease since 2007), likely driven by leopard seal predation (increasing since 2001, p << 0.001) and potentially worsening summer foraging conditions. We estimated that leopard seals consumed an average of 69.3% (range: 50.3–80.9%) of all AFS pups born each year since 2010. AFS foraging-trip durations, an index of their foraging habitat quality, were consistent with decreasing krill and fish availability. Significant improvement in the age-specific over-winter body condition of AFS indicates that observed population declines are driven by processes local to the northern Antarctic Peninsula. The loss of SSI AFS would substantially reduce the genetic diversity of the species, and decrease its resilience to climate change. There is an urgent need to reevaluate the conservation status of Antarctic fur seals, particularly for the rapidly declining SSI population. Dataset Antarc* Antarctic Antarctic Fur Seal Antarctic Fur Seals Antarctic Peninsula Arctocephalus gazella Leopard Seal Leopard Seals South Shetland Islands Frontiers: Figshare Antarctic Antarctic Peninsula South Shetland Islands Shirreff ENVELOPE(-60.792,-60.792,-62.459,-62.459) Cape Shirreff ENVELOPE(-60.800,-60.800,-62.417,-62.417) |
institution |
Open Polar |
collection |
Frontiers: Figshare |
op_collection_id |
ftfrontimediafig |
language |
unknown |
topic |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering Antarctic fur seal conservation status South Shetland Islands top-down and bottom-up control edge population Arctocephalus gazella population dynamics (ecology) |
spellingShingle |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering Antarctic fur seal conservation status South Shetland Islands top-down and bottom-up control edge population Arctocephalus gazella population dynamics (ecology) Douglas J. Krause Carolina A. Bonin Michael E. Goebel Christian S. Reiss George M. Watters Table_1_The Rapid Population Collapse of a Key Marine Predator in the Northern Antarctic Peninsula Endangers Genetic Diversity and Resilience to Climate Change.docx |
topic_facet |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering Antarctic fur seal conservation status South Shetland Islands top-down and bottom-up control edge population Arctocephalus gazella population dynamics (ecology) |
description |
Antarctic fur seals (AFS) are an ecologically important predator and a focal indicator species for ecosystem-based Antarctic fisheries management. This species suffered intensive anthropogenic exploitation until the early 1900s, but recolonized most of its former distribution, including the southern-most colony at Cape Shirreff, South Shetland Islands (SSI). The IUCN describes a single, global AFS population of least concern; however, extensive genetic analyses clearly identify four distinct breeding stocks, including one in the SSI. To update the population status of SSI AFS, we analyzed 20 years of field-based data including population counts, body size and condition, natality, recruitment, foraging behaviors, return rates, and pup mortality at the largest SSI colony. Our findings show a precipitous decline in AFS abundance (86% decrease since 2007), likely driven by leopard seal predation (increasing since 2001, p << 0.001) and potentially worsening summer foraging conditions. We estimated that leopard seals consumed an average of 69.3% (range: 50.3–80.9%) of all AFS pups born each year since 2010. AFS foraging-trip durations, an index of their foraging habitat quality, were consistent with decreasing krill and fish availability. Significant improvement in the age-specific over-winter body condition of AFS indicates that observed population declines are driven by processes local to the northern Antarctic Peninsula. The loss of SSI AFS would substantially reduce the genetic diversity of the species, and decrease its resilience to climate change. There is an urgent need to reevaluate the conservation status of Antarctic fur seals, particularly for the rapidly declining SSI population. |
format |
Dataset |
author |
Douglas J. Krause Carolina A. Bonin Michael E. Goebel Christian S. Reiss George M. Watters |
author_facet |
Douglas J. Krause Carolina A. Bonin Michael E. Goebel Christian S. Reiss George M. Watters |
author_sort |
Douglas J. Krause |
title |
Table_1_The Rapid Population Collapse of a Key Marine Predator in the Northern Antarctic Peninsula Endangers Genetic Diversity and Resilience to Climate Change.docx |
title_short |
Table_1_The Rapid Population Collapse of a Key Marine Predator in the Northern Antarctic Peninsula Endangers Genetic Diversity and Resilience to Climate Change.docx |
title_full |
Table_1_The Rapid Population Collapse of a Key Marine Predator in the Northern Antarctic Peninsula Endangers Genetic Diversity and Resilience to Climate Change.docx |
title_fullStr |
Table_1_The Rapid Population Collapse of a Key Marine Predator in the Northern Antarctic Peninsula Endangers Genetic Diversity and Resilience to Climate Change.docx |
title_full_unstemmed |
Table_1_The Rapid Population Collapse of a Key Marine Predator in the Northern Antarctic Peninsula Endangers Genetic Diversity and Resilience to Climate Change.docx |
title_sort |
table_1_the rapid population collapse of a key marine predator in the northern antarctic peninsula endangers genetic diversity and resilience to climate change.docx |
publishDate |
2022 |
url |
https://doi.org/10.3389/fmars.2021.796488.s001 https://figshare.com/articles/dataset/Table_1_The_Rapid_Population_Collapse_of_a_Key_Marine_Predator_in_the_Northern_Antarctic_Peninsula_Endangers_Genetic_Diversity_and_Resilience_to_Climate_Change_docx/17713520 |
long_lat |
ENVELOPE(-60.792,-60.792,-62.459,-62.459) ENVELOPE(-60.800,-60.800,-62.417,-62.417) |
geographic |
Antarctic Antarctic Peninsula South Shetland Islands Shirreff Cape Shirreff |
geographic_facet |
Antarctic Antarctic Peninsula South Shetland Islands Shirreff Cape Shirreff |
genre |
Antarc* Antarctic Antarctic Fur Seal Antarctic Fur Seals Antarctic Peninsula Arctocephalus gazella Leopard Seal Leopard Seals South Shetland Islands |
genre_facet |
Antarc* Antarctic Antarctic Fur Seal Antarctic Fur Seals Antarctic Peninsula Arctocephalus gazella Leopard Seal Leopard Seals South Shetland Islands |
op_relation |
doi:10.3389/fmars.2021.796488.s001 https://figshare.com/articles/dataset/Table_1_The_Rapid_Population_Collapse_of_a_Key_Marine_Predator_in_the_Northern_Antarctic_Peninsula_Endangers_Genetic_Diversity_and_Resilience_to_Climate_Change_docx/17713520 |
op_rights |
CC BY 4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/fmars.2021.796488.s001 |
_version_ |
1766189777947721728 |