Extremely low seasonal prey capture efficiency in a deep-diving whale, the narwhal
Successful foraging is essential for individuals to maintain the positive energy balance required for survival and reproduction. Yet, prey capture efficiency is poorly documented in marine apex predators, especially deep-diving mammals. We deployed acoustic tags and stomach temperature pills in summ...
Main Authors: | , , |
---|---|
Format: | Other/Unknown Material |
Language: | unknown |
Published: |
Zenodo
2022
|
Subjects: | |
Online Access: | https://doi.org/10.5061/dryad.15dv41p1f |
id |
ftzenodo:oai:zenodo.org:7466285 |
---|---|
record_format |
openpolar |
spelling |
ftzenodo:oai:zenodo.org:7466285 2024-09-09T19:26:35+00:00 Extremely low seasonal prey capture efficiency in a deep-diving whale, the narwhal Chambault, Philippine Blackwell, Susanna B. Heide-Jørgensen, Mads Peter 2022-12-20 https://doi.org/10.5061/dryad.15dv41p1f unknown Zenodo https://doi.org/10.1371/journal.pone.0198295 https://doi.org/10.1186/2050-3385-2-9 https://github.com/pchambault/Narwhals-Prey-Capture-Efficiency.git https://zenodo.org/communities/dryad https://doi.org/10.5061/dryad.15dv41p1f oai:zenodo.org:7466285 info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode Echolocation acoustics buzzes stomach temperature pill foraging behaviour Prey catch attempts info:eu-repo/semantics/other 2022 ftzenodo https://doi.org/10.5061/dryad.15dv41p1f10.1371/journal.pone.019829510.1186/2050-3385-2-9 2024-07-25T12:17:51Z Successful foraging is essential for individuals to maintain the positive energy balance required for survival and reproduction. Yet, prey capture efficiency is poorly documented in marine apex predators, especially deep-diving mammals. We deployed acoustic tags and stomach temperature pills in summer to collect concurrent information on presumed foraging activity (through buzz detection) and successful prey captures (through drops in stomach temperature), providing estimates of feeding efficiency in narwhals. Compared to the daily number of buzzes (706.9 ± 368), the daily rate of feeding events was particularly low in summer (19.8 ± 8.9), and only 8–14% of the foraging dives were successful (i.e., with a detectable prey capture). This extremely low success rate resulted in a very low daily food consumption rate (< 0.5% of body mass), suggesting that narwhals rely on body reserves accumulated in winter to sustain year-round activities. The expected changes or disappearance of their wintering habitats in response to climate change may therefore have severe fitness consequences for narwhal populations. Funding provided by: H2020 Marie Skłodowska-Curie Actions Crossref Funder Registry ID: http://dx.doi.org/10.13039/100010665 Award Number: 48068 Funding provided by: Danish Cooperation for the Environment in the Arctic* Crossref Funder Registry ID: Award Number: Funding provided by: Carlsberg Foundation Crossref Funder Registry ID: http://dx.doi.org/10.13039/501100002808 Award Number: Funding provided by: Greenland Institute of Natural Resources Crossref Funder Registry ID: http://dx.doi.org/10.13039/100008075 Award Number: Other/Unknown Material Arctic Climate change Greenland Greenland Institute of Natural Resources narwhal* Zenodo Arctic Greenland |
institution |
Open Polar |
collection |
Zenodo |
op_collection_id |
ftzenodo |
language |
unknown |
topic |
Echolocation acoustics buzzes stomach temperature pill foraging behaviour Prey catch attempts |
spellingShingle |
Echolocation acoustics buzzes stomach temperature pill foraging behaviour Prey catch attempts Chambault, Philippine Blackwell, Susanna B. Heide-Jørgensen, Mads Peter Extremely low seasonal prey capture efficiency in a deep-diving whale, the narwhal |
topic_facet |
Echolocation acoustics buzzes stomach temperature pill foraging behaviour Prey catch attempts |
description |
Successful foraging is essential for individuals to maintain the positive energy balance required for survival and reproduction. Yet, prey capture efficiency is poorly documented in marine apex predators, especially deep-diving mammals. We deployed acoustic tags and stomach temperature pills in summer to collect concurrent information on presumed foraging activity (through buzz detection) and successful prey captures (through drops in stomach temperature), providing estimates of feeding efficiency in narwhals. Compared to the daily number of buzzes (706.9 ± 368), the daily rate of feeding events was particularly low in summer (19.8 ± 8.9), and only 8–14% of the foraging dives were successful (i.e., with a detectable prey capture). This extremely low success rate resulted in a very low daily food consumption rate (< 0.5% of body mass), suggesting that narwhals rely on body reserves accumulated in winter to sustain year-round activities. The expected changes or disappearance of their wintering habitats in response to climate change may therefore have severe fitness consequences for narwhal populations. Funding provided by: H2020 Marie Skłodowska-Curie Actions Crossref Funder Registry ID: http://dx.doi.org/10.13039/100010665 Award Number: 48068 Funding provided by: Danish Cooperation for the Environment in the Arctic* Crossref Funder Registry ID: Award Number: Funding provided by: Carlsberg Foundation Crossref Funder Registry ID: http://dx.doi.org/10.13039/501100002808 Award Number: Funding provided by: Greenland Institute of Natural Resources Crossref Funder Registry ID: http://dx.doi.org/10.13039/100008075 Award Number: |
format |
Other/Unknown Material |
author |
Chambault, Philippine Blackwell, Susanna B. Heide-Jørgensen, Mads Peter |
author_facet |
Chambault, Philippine Blackwell, Susanna B. Heide-Jørgensen, Mads Peter |
author_sort |
Chambault, Philippine |
title |
Extremely low seasonal prey capture efficiency in a deep-diving whale, the narwhal |
title_short |
Extremely low seasonal prey capture efficiency in a deep-diving whale, the narwhal |
title_full |
Extremely low seasonal prey capture efficiency in a deep-diving whale, the narwhal |
title_fullStr |
Extremely low seasonal prey capture efficiency in a deep-diving whale, the narwhal |
title_full_unstemmed |
Extremely low seasonal prey capture efficiency in a deep-diving whale, the narwhal |
title_sort |
extremely low seasonal prey capture efficiency in a deep-diving whale, the narwhal |
publisher |
Zenodo |
publishDate |
2022 |
url |
https://doi.org/10.5061/dryad.15dv41p1f |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Climate change Greenland Greenland Institute of Natural Resources narwhal* |
genre_facet |
Arctic Climate change Greenland Greenland Institute of Natural Resources narwhal* |
op_relation |
https://doi.org/10.1371/journal.pone.0198295 https://doi.org/10.1186/2050-3385-2-9 https://github.com/pchambault/Narwhals-Prey-Capture-Efficiency.git https://zenodo.org/communities/dryad https://doi.org/10.5061/dryad.15dv41p1f oai:zenodo.org:7466285 |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode |
op_doi |
https://doi.org/10.5061/dryad.15dv41p1f10.1371/journal.pone.019829510.1186/2050-3385-2-9 |
_version_ |
1809896160550191104 |