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Variation of blubber thickness for three marine mammal species in the southern Baltic Sea

dc.contributor.authorSiebert, Ursula
dc.contributor.authorGrilo, Miguel
dc.contributor.authorKesselring, Tina
dc.contributor.authorLehnert, Kristina
dc.contributor.authorRonnenberg, Katrin
dc.contributor.authorPawliczka, Iwona
dc.contributor.authorGalatius, Anders
dc.contributor.authorKyhn, Line
dc.contributor.authorDähne, Michael
dc.contributor.authorGilles, Anita
dc.date.accessioned2023-01-05T17:00:45Z
dc.date.available2023-01-05T17:00:45Z
dc.date.issued2022
dc.description.abstractEvaluating populational trends of health condition has become an important topic for marine mammal populations under the Marine Strategy Framework Directive (MSFD). In the Baltic Sea, under the recommendation of Helsinki Commission (HELCOM), efforts have been undertaken to use blubber thickness as an indicator of energy reserves in marine mammals. Current values lack geographical representation from the entire Baltic Sea area and a large dataset is only available for grey seals (Halichoerus grypus) from Sweden and Finland. Knowledge on variation of blubber thickness related to geography throughout the Baltic Sea is important for its usage as an indicator. Such evaluation can provide important information about the energy reserves, and hence, food availability. It is expected that methodological standardization under HELCOM should include relevant datasets with good geographical coverage that can also account for natural variability in the resident marine mammal populations. In this study, seasonal and temporal trends of blubber thickness were evaluated for three marine mammal species—harbor seal (Phoca vitulina), grey seal (Halichoerus grypus) and harbor porpoise (Phocoena phocoena)—resident in the southern Baltic Sea collected and investigated under stranding networks. Additionally, the effects of age, season and sex were analyzed. Seasonal variation of blubber thickness was evident for all species, with harbor seals presenting more pronounced effects in adults and grey seals and harbor porpoises presenting more pronounced effects in juveniles. For harbor seals and porpoises, fluctuations were present over the years included in the analysis. In the seal species, blubber thickness values were generally higher in males. In harbor seals and porpoises, blubber thickness values differed between the age classes: while adult harbor seals displayed thicker blubber layers than juveniles, the opposite was observed for harbor porpoises. Furthermore, while an important initial screening tool, blubber thickness assessment cannot be considered a valid methodology for overall health assessment in marine mammals and should be complemented with data on specific health parameters developed for each speciespt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationSiebert, U., Kesselring, T., Lehnert, K., Ronnenberg, K., Gilles, A., Grilo, M. L., Pawliczka, I., Galatius, A., Kyhn, L. A., & Dähne, M. (2022). Variation of blubber thickness for three marine mammal species in the southern Baltic Sea. Frontiers in Physiology, 13. https://doi.org/10.3389/fphys.2022.880465pt_PT
dc.identifier.doi10.3389/fphys.2022.880465pt_PT
dc.identifier.issn1664042X
dc.identifier.urihttp://hdl.handle.net/10400.12/8902
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherFrontiers Media S.A.pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectBlubber thicknesspt_PT
dc.subjectHarbor sealspt_PT
dc.subjectGrey sealspt_PT
dc.subjectHarbor porpoisespt_PT
dc.subjectNatural variationspt_PT
dc.subjectHELCOM areapt_PT
dc.titleVariation of blubber thickness for three marine mammal species in the southern Baltic Seapt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.conferencePlaceSwitzerlandpt_PT
oaire.citation.titleFrontiers in Physiologypt_PT
oaire.citation.volume13pt_PT
person.familyNameSiebert
person.familyNameGrilo
person.familyNameKesselring
person.familyNameLehnert
person.familyNameRonnenberg
person.familyNamePawliczka
person.familyNameGalatius
person.familyNameKyhn
person.familyNameDähne
person.familyNameGilles
person.givenNameUrsula
person.givenNameMiguel
person.givenNameTina
person.givenNameKristina
person.givenNameKatrin
person.givenNameIwona
person.givenNameAnders
person.givenNameLine
person.givenNameMichael
person.givenNameAnita
person.identifier424653
person.identifier.ciencia-id4B17-DF6F-1A51
person.identifier.orcid0000-0002-2556-3948
person.identifier.orcid0000-0001-7364-821X
person.identifier.orcid0000-0002-7920-1993
person.identifier.orcid0000-0001-8938-3340
person.identifier.orcid0000-0002-8538-2831
person.identifier.orcid0000-0001-9235-9456
person.identifier.orcid0000-0003-1237-2066
person.identifier.orcid0000-0002-0926-6812
person.identifier.orcid0000-0003-1071-4640
person.identifier.orcid0000-0001-7234-8645
person.identifier.ridE-7119-2014
person.identifier.scopus-author-id57195729611
person.identifier.scopus-author-id24776135500
person.identifier.scopus-author-id14025535600
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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