37 Works

Nutrient digestibility and balance studies

Sadjad Danesh Mesgaran, Björn Kuhla, René Baumont, Gonzalo Cantalapiedra-Hijar, Pierre Noziére, Peter Lund, David Humphries & Jan Dijkstra
The nutritional value of a feed for cattle depends on its nutrient and energy contents, the extent of rumen fermentation and degradation, and the post-ruminal digestibility. Efficiency of digestion depends on different factors, for example, the apparent digestibility (estimated by subtracting the nutrients contained in faeces from the nutrients contained in dietary intake – unlike true digestibility where the endogenous and microbial amount is taken into account and corrected in final outcome) usually decreases when...

Rumen fluid sampling via oral stomach tubing method

Sanne van Gastelen, Wouter Muizelaar, Paolo Bani, Björn Kuhla, Mogens Larsen & David Yáñez-Ruiz
There are different purposes for collecting rumen fluid, e.g. assessment of rumen fermentation characteristics and rumen microbiota, as well as ex vivo incubations for feed analysis. Collecting rumen content through the fistula from rumen cannulated ruminants is considered the reference method for the collection of representative samples of rumen digesta, but access to surgically-modified animals is not universal and restricted to research facilities. Hence, a less invasive alternative has been developed: the oral stomach tubing...

COVID-19-forskning: Del data om dine aktiviteter i ny app, og gør en forskel

Trine Rolighed Thomsen, Zahra Partovi Nasr & Carsten Obel

Hvornår kom de første mennesker til Amerika? Sporene bliver ældre og ældre

Ole Høiris

Hvordan spredte mennesket sig fra Afrika og ud over Jorden?

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Homo sapiens' vandring ud af Afrika var… snørklet

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Det moderne menneskes vej ind i Asien stiller store spørgsmål til vores oprindelse

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Electronic Literature Translation: Translation as Process, Experience and Mediation

Manuel Portela, María Mencía & Søren Pold
"[T]ranslation is merely a preliminary way of coming to terms with the foreignness of languages to each other." (Walter Benjamin, "The Task of the Translator" [1921])

Feed and water intake

Sadjad Danesh Mesgaran, Björn Kuhla, David Humphries, Martin Weisbjerg, Peter Lund, Emer Kennedy, Michael O'Donovan, Michelle Liddane, Norann Galvin, Jan Dijkstra & René Baumont
Knowledge about dry matter intake (DMI) is a very important element in cattle management. Modern, high producing dairy cows require great amount of feed in order to meet the nutrient and energy requirements for maintenance and milk production, particularly during early lactation. In beef animals, current breeding strategies aim to select animals with low residual feed intake. Therefore, individual feed intake evaluation helps to identify the productivity and efficiency of each animal, in relation to...

Respiratory chamber facility

Sadjad Danesh Mesgaran, Michael Derno, Björn Kuhla, Karen Beauchemin, Cécile Martin, Anne Louise Frydendahl Hellwing, Peter Lund, Gemma Miller, David Humphries & Marcel Heetkamp
This guideline will highlight the key steps required when measuring gas exchange of cattle for the estimation of methane emission and heat production (by estimating the relation of emitted CO2 and CH4 to the consumed O2) via a respiration chamber (RC). The authors acknowledge the variation in RC design in different experimental units, and therefore, the mentioned steps within this guideline are common and essential for all. Note that a CO2 and/or CH4 recovery test...

En 14.300 år gammel lort væltede teorien om de første menneskers ankomst til Amerika

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Rumination activity

Sadjad Danesh Mesgaran, Lene Munksgaard, René Baumont, Björn Kuhla & David Humphries
The daily rumination pattern in cattle is influenced by different factors such as feeding frequency, physical and chemical characteristics of the diet, feeding time, fasting, photoperiod and grazing management. Studies have observed an apparent decrease in rumination activity in ruminal acidosis or mastitis challenging dairy cattle. Social and physical environment can also affect cattle’s rumination behaviour. Manual observation of eating and rumination in individual animal is time-consuming and labour intensive. Therefore, the need for developing...

Behavioural tests

Emma Ternman, Guilherme Amorim Franchi & Lene Munksgaard
o answer specific questions regarding cow behaviour or affective states, it is sometimes necessary to study the cow’s responses to specific stimuli in a test situation. This can be done either in the animal’s home environment or in a test arena. As specific research questions determine the test design, it is not possible to provide a general guideline that fits all types of behavioural test. However, there are several considerations common for most behaviour tests...

Ethics in experiments on live cattle: a pragmatic approach

Isabelle Veissier, Véronique Deiss, Mette Herskin, Emer Kennedy & Kenny Rutherford
There are ongoing philosophical, moral, and societal debates about experiments on live animals. Along with a consequentialist approach, it may be considered that an action – here an experiment on live animals – is morally acceptable if the knowledge it aims to produce can result in an overall benefit. In other words, it is acceptable if the constraints imposed on the animals involved are outweighed by the larger benefits expected for others (humans or animals)....

Lying, standing, and eating behaviour

Lene Munksgaard, Emma Ternman, Isabelle Veissier, Carol-Anne Duthie & René Baumont
Standing and lying behaviours are well-defined. Lying is often described as when the flank or sternum of the animal is in contact with the ground, and end of lying when all four legs are perpendicular to the body. The transition from lying to standing and vice versa requires only a few seconds, and therefore differences in the description of lying do not greatly affect the calculation of time spent lying or standing. By contrast, if...

A checklist to validate sensor output for the recording of cattle behaviour

Matthieu Bouchon, Alex Bach, Bruno Meunier, Emma Ternman, Kees Van Reenen, Isabelle Veissier & Lene Munksgaard
A process of validation assesses the appropriateness and usefulness of a tool for its intended purpose within a specific context. Ideally, the validation of a tool should describe the range of purposes and contexts in which it is appropriate. This generally cannot be done completely. Therefore, when such a wide validation cannot be done, the validation process needs to refer clearly to the purpose of the use of the tool and to which animals it...

Levende menneskehjerner i petriskåle leverer unikt indblik i mysterier

Emma Louth

Lobbying in Scandinavia

Øyvind Ihlen, Anne Skorkjær Binderkrantz & PerOla Öberg

Bodyweight, body condition and anatomy

Sadjad Danesh Mesgaran, Martin Weisbjerg, Alex Bach, Jennifer Salau, Jan Henning Haas, Wolfgang Junge, Georg Thaller & Björn Kuhla
Measuring bodyweight (BW) in cattle is essential for many research and management activities such as calculating dietary energy requirements for maintenance, calculating average daily gain and evaluating breeding values which include BW as a trait. Frequent monitoring of BW in dairy cows is necessary as changes in BW can help assess the energy balance of an animal. Precise understanding of BW gain of growing and fattening cattle or body mass changes during lactation is crucial...

The topography of the Eurekan Orogen of Ellesmere Island and the Canadian-Greenland polar continental margin

Randell Stephenson, Gordon Oakey & Søren Bom Nielsen

Flagermus er effektive dræbere, fordi de jager med tunnelsyn

Laura Stidsholt

The gas recovery test of respiratory chambers

Sadjad Danesh Mesgaran, Anne Louise Frydendahl Hellwing, Peter Lund, Michael Derno, Björn Kuhla, Marcel Heetkamp, Gemma Miller, David Humphries, Frederic Anglard, Yvanne Rochette, Cécile Martin, Tom Gardiner & Marc Coleman
Respiratory Chambers (RCs) were originally constructed with the purpose to study heat production from animals by quantifying oxygen (O2) consumption and carbon dioxide (CO2) production (initially detailed in the 18th century by Lavoisier and Leplace. Enteric methane (CH4) is measured in calorimetry studies, as CH4 is an energy loss. The RC can therefore be used to quantify the CH4 production from animals, and many new RC units have been constructed during the last decades with...

Citizen science guider forskerne til vigtige marsvin-områder

Freja Jakobsen, Signe Sveegaard & Magnus Wahlberg

SKRIIIG! Sådan virker lyden i gyserfilm

Frederik Lundsgaard Jensen & Mathias Clasen

Menneskets ankomst til Australien var lidt af en bedrift

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Registration Year

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Resource Types

  • Text
    37

Affiliations

  • Aarhus University
    37
  • National Research Institute for Agriculture, Food and Environment
    8
  • University of Clermont Auvergne
    8
  • Leibniz Institute for Farm Animal Biology
    8
  • Wageningen University & Research
    6
  • University of Reading
    6
  • Scotland's Rural College
    4
  • Institució Catalana de Recerca i Estudis Avançats
    2
  • Teagasc - The Irish Agriculture and Food Development Authority
    2
  • University of Southern Denmark
    2