Assessing seal carcasses potentially subjected to grey seal predation

Abstract In order to conduct an objective evaluation of potential ecological effects of grey seal predation on marine mammals, it is essential to establish a broad knowledge base helping in the thorough identification of such cases during post-mortem examination. The aim of this work is to report an...

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Autores principales:	Abbo van Neer, Stephanie Gross, Tina Kesselring, Miguel L. Grilo, Eva Ludes-Wehrmeister, Giulia Roncon, Ursula Siebert
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/c2f92bfe458d4f429796d51463a6b111
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spelling	oai:doaj.org-article:c2f92bfe458d4f429796d51463a6b1112021-12-02T14:01:22ZAssessing seal carcasses potentially subjected to grey seal predation10.1038/s41598-020-80737-92045-2322https://doaj.org/article/c2f92bfe458d4f429796d51463a6b1112021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-80737-9https://doaj.org/toc/2045-2322Abstract In order to conduct an objective evaluation of potential ecological effects of grey seal predation on marine mammals, it is essential to establish a broad knowledge base helping in the thorough identification of such cases during post-mortem examination. The aim of this work is to report and discuss outcomes resulting from a retrospective evaluation of harbour (Phoca vitulina) and grey seal (Halichoerus grypus) stranding and necropsy data (n = 3274). In addition, the results are compared to a recent case of definite grey seal predation from Germany as well as reports from other countries. Carcasses potentially subjected to grey seal predation show severe lacerations with a circular pattern leaving a smooth, linear and cut-like wound margin. Large parts of skin and underlying tissue are detached from the body and loss of blubber is common. Occurrence frequencies of encountered lesions are presented and a list of parameters to be used for the assessment of similar cases as well as a complementary decision tree are suggested. With the proposed parameters, categories and tools, a baseline can be built in order to facilitate the standardised recognition of predation cases during post-mortem examinations of seals between groups working with populations across several geographic ranges.Abbo van NeerStephanie GrossTina KesselringMiguel L. GriloEva Ludes-WehrmeisterGiulia RonconUrsula SiebertNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Abbo van Neer Stephanie Gross Tina Kesselring Miguel L. Grilo Eva Ludes-Wehrmeister Giulia Roncon Ursula Siebert Assessing seal carcasses potentially subjected to grey seal predation
description	Abstract In order to conduct an objective evaluation of potential ecological effects of grey seal predation on marine mammals, it is essential to establish a broad knowledge base helping in the thorough identification of such cases during post-mortem examination. The aim of this work is to report and discuss outcomes resulting from a retrospective evaluation of harbour (Phoca vitulina) and grey seal (Halichoerus grypus) stranding and necropsy data (n = 3274). In addition, the results are compared to a recent case of definite grey seal predation from Germany as well as reports from other countries. Carcasses potentially subjected to grey seal predation show severe lacerations with a circular pattern leaving a smooth, linear and cut-like wound margin. Large parts of skin and underlying tissue are detached from the body and loss of blubber is common. Occurrence frequencies of encountered lesions are presented and a list of parameters to be used for the assessment of similar cases as well as a complementary decision tree are suggested. With the proposed parameters, categories and tools, a baseline can be built in order to facilitate the standardised recognition of predation cases during post-mortem examinations of seals between groups working with populations across several geographic ranges.
format	article
author	Abbo van Neer Stephanie Gross Tina Kesselring Miguel L. Grilo Eva Ludes-Wehrmeister Giulia Roncon Ursula Siebert
author_facet	Abbo van Neer Stephanie Gross Tina Kesselring Miguel L. Grilo Eva Ludes-Wehrmeister Giulia Roncon Ursula Siebert
author_sort	Abbo van Neer
title	Assessing seal carcasses potentially subjected to grey seal predation
title_short	Assessing seal carcasses potentially subjected to grey seal predation
title_full	Assessing seal carcasses potentially subjected to grey seal predation
title_fullStr	Assessing seal carcasses potentially subjected to grey seal predation
title_full_unstemmed	Assessing seal carcasses potentially subjected to grey seal predation
title_sort	assessing seal carcasses potentially subjected to grey seal predation
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/c2f92bfe458d4f429796d51463a6b111
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Assessing seal carcasses potentially subjected to grey seal predation

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