Abstract：
:As a follow-up on the data presented for seals, we herein report and discuss outcomes resulting from a retrospective evaluation of harbour porpoise stranding and necropsy data from Schleswig-Holstein, Germany (n = 4463) to enable an objective evaluation of potential ecological effects of grey seal predation on porpoises. Results are compared to a recent case of definite grey seal predation as well as to reports from other countries. Porpoise carcasses potentially subject to grey seal predation show severe lacerations, with large parts of skin and underlying tissue being detached from the body. Loss of blubber tissue is common. Based on the occurrence frequencies of encountered lesions, a list of parameters as well as a complementary decision tree are suggested to be used for future assessments. The results shown add to an increasingly standardised assessment protocol of suspected grey seal predation cases making respective results comparable between different areas and countries. The usage of a standardised protocol may increase the awareness of grey seal predation and the reporting of such cases. By this, differences in the predation and feeding patterns as well as the potential ecological relevance of this behaviour may be elucidated.
journal_name
Sci Repjournal_title
Scientific reportsauthors
van Neer A,Gross S,Kesselring T,Grilo ML,Ludes-Wehrmeister E,Roncon G,Siebert Udoi
10.1038/s41598-020-73258-ysubject
Has Abstractpub_date
2020-10-01 00:00:00pages
16345issue
1issn
2045-2322pii
10.1038/s41598-020-73258-yjournal_volume
10pub_type
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