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dc.contributor.authorStepien, Emilie Nicoline
dc.contributor.authorNabe–Nielsen, Jacob
dc.contributor.authorHansen, Kirstin Anderson
dc.contributor.authorKristensen, Jakob Højer
dc.contributor.authorBlanchet, Marie-Anne
dc.contributor.authorBrando, Sabrina
dc.contributor.authorDesportes, Geneviève
dc.contributor.authorLockyer, Christina
dc.contributor.authorMarcenaro, Lauro
dc.contributor.authorBunskoek, Paulien
dc.contributor.authorKemper, José
dc.contributor.authorSiebert, Ursula
dc.contributor.authorOlsen, Morten Tange
dc.contributor.authorWahlberg, Magnus
dc.date.accessioned2023-08-09T10:46:55Z
dc.date.available2023-08-09T10:46:55Z
dc.date.issued2023-01-27
dc.description.abstractLongitudinal data on individual growth and seasonal changes in body mass, girth, and blubber thickness are rarely available for cetaceans, making it difficult to assess their population composition and individual nutritional condition. During different time intervals from 1997 to 2020, we collected longitudinal data on length, body mass, girth,and blubber thickness from seventeen harbour porpoises (Phocoena phocoena) in human care. We compared Gompertz and von Bertalanffy growth curves to collected length data at age 0–4 years for five individuals with known dates of birth. Von Bertalanffy had the lowest AICc value and was used to predict the birth year of twelve animals which age had previously been estimated based on tooth ring analysis and ossification of flipper bones. The growth curve was accurate within 1 yr. of age estimates. Within the first year, the calves grew 66%, attaining 84% of their adult length, and reached asymptotic length at age 3–4. For adults, there were large seasonal variations in body mass, body mass index, girth, and blubber thickness, with up to 28% of variation in body mass between seasons. We predicted individual body mass within ± 2 kg using measurements of length and girth, allowing estimation of body mass index of individuals with unknown mass. Our findings enable monitoring and assessments of population composition as well as nutritional condition of individual harbour porpoises, which is crucial for assessing conservational status and guiding management.en_US
dc.identifier.citationStepien, Nabe–Nielsen, Hansen, Kristensen, Blanchet, Brando, Desportes, Lockyer, Marcenaro, Bunskoek, Kemper, Siebert, Olsen, Wahlberg. Determination of growth, mass, and body mass index of harbour porpoises (Phocoena phocoena): Implications for conservational status assessment of populations. Global Ecology and Conservation. 2023;42:e02384:1-16en_US
dc.identifier.cristinIDFRIDAID 2133275
dc.identifier.doi10.1016/j.gecco.2023.e02384
dc.identifier.issn2351-9894
dc.identifier.urihttps://hdl.handle.net/10037/29820
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.relation.journalGlobal Ecology and Conservation
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2023 The Author(s)en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0en_US
dc.rightsAttribution 4.0 International (CC BY 4.0)en_US
dc.titleDetermination of growth, mass, and body mass index of harbour porpoises (Phocoena phocoena): Implications for conservational status assessment of populationsen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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Attribution 4.0 International (CC BY 4.0)
Except where otherwise noted, this item's license is described as Attribution 4.0 International (CC BY 4.0)