Rapid weight loss in free ranging pygmy killer whales (Feresa attenuata) and the implications for anthropogenic disturbance of odontocetes

Abstract Understanding the impacts of foraging disruptions to odontocete body condition is fundamental to quantifying biological effects of human disturbance and environmental changes on cetacean populations. Here, reductions in body volume of free-ranging pygmy killer whales (Feresa attenuata) were...

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Autores principales:	Jens J. Currie, Martin van Aswegen, Stephanie H. Stack, Kristi L. West, Fabien Vivier, Lars Bejder
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/d5e3b10f7a5d40e392be301efb285925
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spelling	oai:doaj.org-article:d5e3b10f7a5d40e392be301efb2859252021-12-02T15:51:12ZRapid weight loss in free ranging pygmy killer whales (Feresa attenuata) and the implications for anthropogenic disturbance of odontocetes10.1038/s41598-021-87514-22045-2322https://doaj.org/article/d5e3b10f7a5d40e392be301efb2859252021-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-87514-2https://doaj.org/toc/2045-2322Abstract Understanding the impacts of foraging disruptions to odontocete body condition is fundamental to quantifying biological effects of human disturbance and environmental changes on cetacean populations. Here, reductions in body volume of free-ranging pygmy killer whales (Feresa attenuata) were calculated using repeated measurements of the same individuals obtained through Unoccupied Aerial System (UAS)-photogrammetry during a prolonged disruption in foraging activity arising from a 21-day stranding event. Stranded individuals were used to verify UAS-derived volume and length estimates through 3D-imaging, water displacement, and post-mortem measurements. We show that (a) UAS estimates of length were within 1.5% of actual body length and UAS volume estimates were within 10–13% of actual volume, (b) foraging disruption resulted in a daily decrease of 2% of total body mass/day, and (c) pygmy killer whales can lose up to 27% of their total body weight within 17 days. These findings highlight the use of UAS as a promising new method to remotely monitor changes in body condition and animal health, which can be used to determine the potential effects of anthropogenic disturbance and environmental change on free-ranging odontocetes.Jens J. CurrieMartin van AswegenStephanie H. StackKristi L. WestFabien VivierLars BejderNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Jens J. Currie Martin van Aswegen Stephanie H. Stack Kristi L. West Fabien Vivier Lars Bejder Rapid weight loss in free ranging pygmy killer whales (Feresa attenuata) and the implications for anthropogenic disturbance of odontocetes
description	Abstract Understanding the impacts of foraging disruptions to odontocete body condition is fundamental to quantifying biological effects of human disturbance and environmental changes on cetacean populations. Here, reductions in body volume of free-ranging pygmy killer whales (Feresa attenuata) were calculated using repeated measurements of the same individuals obtained through Unoccupied Aerial System (UAS)-photogrammetry during a prolonged disruption in foraging activity arising from a 21-day stranding event. Stranded individuals were used to verify UAS-derived volume and length estimates through 3D-imaging, water displacement, and post-mortem measurements. We show that (a) UAS estimates of length were within 1.5% of actual body length and UAS volume estimates were within 10–13% of actual volume, (b) foraging disruption resulted in a daily decrease of 2% of total body mass/day, and (c) pygmy killer whales can lose up to 27% of their total body weight within 17 days. These findings highlight the use of UAS as a promising new method to remotely monitor changes in body condition and animal health, which can be used to determine the potential effects of anthropogenic disturbance and environmental change on free-ranging odontocetes.
format	article
author	Jens J. Currie Martin van Aswegen Stephanie H. Stack Kristi L. West Fabien Vivier Lars Bejder
author_facet	Jens J. Currie Martin van Aswegen Stephanie H. Stack Kristi L. West Fabien Vivier Lars Bejder
author_sort	Jens J. Currie
title	Rapid weight loss in free ranging pygmy killer whales (Feresa attenuata) and the implications for anthropogenic disturbance of odontocetes
title_short	Rapid weight loss in free ranging pygmy killer whales (Feresa attenuata) and the implications for anthropogenic disturbance of odontocetes
title_full	Rapid weight loss in free ranging pygmy killer whales (Feresa attenuata) and the implications for anthropogenic disturbance of odontocetes
title_fullStr	Rapid weight loss in free ranging pygmy killer whales (Feresa attenuata) and the implications for anthropogenic disturbance of odontocetes
title_full_unstemmed	Rapid weight loss in free ranging pygmy killer whales (Feresa attenuata) and the implications for anthropogenic disturbance of odontocetes
title_sort	rapid weight loss in free ranging pygmy killer whales (feresa attenuata) and the implications for anthropogenic disturbance of odontocetes
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/d5e3b10f7a5d40e392be301efb285925
work_keys_str_mv	AT jensjcurrie rapidweightlossinfreerangingpygmykillerwhalesferesaattenuataandtheimplicationsforanthropogenicdisturbanceofodontocetes AT martinvanaswegen rapidweightlossinfreerangingpygmykillerwhalesferesaattenuataandtheimplicationsforanthropogenicdisturbanceofodontocetes AT stephaniehstack rapidweightlossinfreerangingpygmykillerwhalesferesaattenuataandtheimplicationsforanthropogenicdisturbanceofodontocetes AT kristilwest rapidweightlossinfreerangingpygmykillerwhalesferesaattenuataandtheimplicationsforanthropogenicdisturbanceofodontocetes AT fabienvivier rapidweightlossinfreerangingpygmykillerwhalesferesaattenuataandtheimplicationsforanthropogenicdisturbanceofodontocetes AT larsbejder rapidweightlossinfreerangingpygmykillerwhalesferesaattenuataandtheimplicationsforanthropogenicdisturbanceofodontocetes
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Rapid weight loss in free ranging pygmy killer whales (Feresa attenuata) and the implications for anthropogenic disturbance of odontocetes

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