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dc.contributor.authorHansen, Kia Krarup
dc.contributor.authorSundset, Monica Alterskjær
dc.contributor.authorFolkow, Lars
dc.contributor.authorNilsen, Marte
dc.contributor.authorMathiesen, Svein Disch
dc.date.accessioned2018-11-12T13:40:05Z
dc.date.available2018-11-12T13:40:05Z
dc.date.issued2018
dc.description.abstractMethane emissions from reindeer (Rangifer tarandus tarandus) fed lichens (mainly Cladonia stellaris) and a concentrate feed were determined using open-circuit respirometry. The lichen diet was low in crude protein (< 2.6% of dry matter [DM]), starch (6.0% DM) and acid detergent lignin (2.0% DM) compared to the concentrate feed (12.7, 22.5 and 7.2% DM, respectively), and high in neutral detergent fibre (82.2% DM versus 34.8% DM in concentrate feed). The feeds were offered in equal amounts (ca. 0.440 kg DM) 2 h after initiating methane recordings in the respiration chamber. The reindeer were adapted to these diets for > 4 weeks prior to experiments and methane emissions recorded for two separate 23 h periods for each diet. Methane emissions increased on average by 0.93 g/h (or by 5.8 times) in the first hour after feeding the concentrate feed, while emissions remained unchanged after the intake of lichens. Mean methane emissions from reindeer (n = 5) were 7.5 ± 0.54 (SE) g CH4 day−1 when fed lichens, compared to a higher emission (p = 0.001) of 11.2 ± 0.54 g CH4 day−1 on the concentrate diet. The mean proportion of gross energy intake lost as methane was 5.2 ± 0.37% on the lichens and 7.6 ± 0.37%, or some 50% higher, on the concentrate feed. This difference was significant (p < 0.001). Our results suggest that it is of environmental importance to preserve the lichens on the tundra and minimize supplementary feeding with concentrate diets, in order to reduce methane emission.en_US
dc.description.sponsorshipThe Reindeer Husbandry Research Fund UiT The Arctic University of Norwayen_US
dc.descriptionSource at <a href=https://doi.org/10.1080/17518369.2018.1505396> https://doi.org/10.1080/17518369.2018.1505396</a>.en_US
dc.identifier.citationHansen, K.K., Sundset, M.A., Folkow, L.P., Nilsen, M. & Mathiesen, S.D. (2018). Methane emissions are lower from reindeer fed lichens compared to a concentrate feed. <i>Polar Research</i>, 37(1). https://doi.org/10.1080/17518369.2018.1505396en_US
dc.identifier.issn0800-0395
dc.identifier.issn1751-8369
dc.identifier.otherFRIDAID 1623073
dc.identifier.other10.1080/17518369.2018.1505396
dc.identifier.urihttp://hdl.handle.net/10037/14158
dc.language.isoengen_US
dc.publisherTaylor & Francis Openen_US
dc.relation.journalPolar Research
dc.rights.accessRightsopenAccessen_US
dc.subjectVDP::Mathematics and natural science: 400::Zoology and botany: 480en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480en_US
dc.subjectRespirometryen_US
dc.subjectdietary secondary compoundsen_US
dc.subjectenergy lossen_US
dc.subjectRangifer tarandusen_US
dc.titleMethane emissions are lower from reindeer fed lichens compared to a concentrate feeden_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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