Gerken, Martina

[["dc.bibliographiccitation.artnumber","4037"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Scientific Reports"],["dc.bibliographiccitation.volume","9"],["dc.contributor.author","Riek, Alexander"],["dc.contributor.author","Stölzl, Anna"],["dc.contributor.author","Marquina Bernedo, Rodolfo"],["dc.contributor.author","Ruf, Thomas"],["dc.contributor.author","Arnold, Walter"],["dc.contributor.author","Hambly, Catherine"],["dc.contributor.author","Speakman, John R."],["dc.contributor.author","Gerken, Martina"],["dc.date.accessioned","2019-07-09T11:51:06Z"],["dc.date.available","2019-07-09T11:51:06Z"],["dc.date.issued","2019"],["dc.description.abstract","Some large herbivores exhibit seasonal adjustments in their energy metabolism. Therefore, our aim was to determine if the llama (one of the most extensively kept livestock breeds) exhibits seasonal adjustment of their energy expenditure, body temperature and locomotion, under its natural high altitude Andean habitat. For this purpose, energy expenditure, body temperature and locomotion were measured in seven non-pregnant llama dams for ten months on the Andean High Plateau (4400 m above sea level). Daily energy expenditure was measured as field metabolic rate using the doubly labelled water method at four different measurement times. Additionally, a telemetry system was used to continuously record activity, body temperature (3 min intervals) as well as the position (hourly) of each animal. The results show that llamas adjusted their body temperature and daily energy expenditure according to environmental conditions. Furthermore, llamas under high altitude Andean climatic conditions exhibited a pronounced daily rhythm in body temperature and activity, with low values at sunrise and increasing values towards sunset. Llamas also had remarkably low energy expenditure compared to other herbivores. Thus, despite the domestication process, llamas have not lost the ability to adjust their body temperature and daily energy expenditure under adverse environmental conditions, similar to some wild herbivores"],["dc.identifier.doi","10.1038/s41598-019-40576-9"],["dc.identifier.pmid","30858417"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/16048"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/59875"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.subject.ddc","630"],["dc.title","Energy expenditure and body temperature variations in llamas living in the High Andes of Peru"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","7600"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Scientific reports"],["dc.bibliographiccitation.volume","7"],["dc.contributor.author","Riek, Alexander"],["dc.contributor.author","Brinkmann, Lea"],["dc.contributor.author","Gauly, Matthias"],["dc.contributor.author","Perica, Jurcevic"],["dc.contributor.author","Ruf, Thomas"],["dc.contributor.author","Arnold, Walter"],["dc.contributor.author","Hambly, Catherine"],["dc.contributor.author","Speakman, John R."],["dc.contributor.author","Gerken, Martina"],["dc.date.accessioned","2019-07-09T11:44:52Z"],["dc.date.available","2019-07-09T11:44:52Z"],["dc.date.issued","2017-08-08"],["dc.description.abstract","Mammals typically keep their body temperature (Tb) within a narrow limit with changing environmental conditions. There are indications that some wild ungulates can exhibit certain forms of energy saving mechanisms when ambient temperatures are low and/or food is scarce. Therefore, the aim of the study was to determine if the llama, one of the most extensively kept domestic livestock species, exhibits seasonal adjustment mechanisms in terms of energy expenditure, Tb and locomotion. For that purpose llamas (N = 7) were kept in a temperate habitat on pasture. Locomotor activity, Tb (measured in the rumen) and the location of each animal were recorded continuously for one year using a telemetry system. Daily energy expenditure was measured as field metabolic rate (FMR). FMR fluctuated considerably between seasons with the lowest values found in winter (17.48 ± 3.98 MJ d-1, 402 kJ kg-0.75 d-1) and the highest in summer (25.87 ± 3.88 MJ d-1, 586 kJ kg-0.75 d-1). Llamas adjusted their energy expenditure, Tb and locomotor activity according to season and also time of day. Thus, llamas seem to have maintained the ability to reduce their energy expenditure and adjust their Tb under adverse environmental conditions as has been reported for some wild ungulates."],["dc.identifier.doi","10.1038/s41598-017-07946-7"],["dc.identifier.pmid","28790450"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/14938"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/59115"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.relation.issn","2045-2322"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0/"],["dc.subject.ddc","630"],["dc.title","Seasonal changes in energy expenditure, body temperature and activity patterns in llamas (Lama glama)."],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]