Richard Dewhurst

Prof

  • Crichton Estate, SAC Consulting, Heston House

    DG1 4TA Dumfries

    United Kingdom

1986 …2023
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Research Output 1986 2019

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Article
2019

A bio-economic model for cost analysis of alternative management strategies in beef finishing systems

Kamilaris, C., Dewhurst, RJ., Vosough Ahmadi, B., Crosson, P. & Alexander, P., 23 Sep 2019, (Accepted/In press) In : Agricultural Systems.

Research output: Contribution to journalArticle

bioeconomic models
cost analysis
finishing
beef
forage

A parsimonious software sensor for estimating the individual dynamic pattern of methane emissions from cattle

Munoz-Tamayo, R., Ramirez Agudelo, JF., Dewhurst, RJ., Miller, G., Vernon, T. & Kettle, H., Jun 2019, In : Animal. 13, 6, p. 1180-1187 8 p.

Research output: Contribution to journalArticle

Open Access
File
Methane
Sensors
Time measurement
Beef
Bins
18 Downloads (Pure)

Identification of rumen microbial genes involved in pathways linked to appetite, growth and feed conversion efficiency in cattle

Lima, J., Auffret, M., Stewart, R. D., Dewhurst, RJ., Duthie, C-A., Snelling, T. J., Walker, A. W., Freeman, T. C., Watson, M. & Roehe, R., 8 Aug 2019, In : Frontiers in Genetics. 10, 701.

Research output: Contribution to journalArticle

Open Access
File
Microbial Genes
Rumen
Appetite
Microbiota
Growth
2018
60 Citations (Scopus)
4 Downloads (Pure)

Assembly of 913 microbial genomes from metagenomic sequencing of the cow rumen

Stewart, RD., Auffret, MD., Warr, A., Wiser, AH., Press, MO., Langford, KW., Liachko, I., Snelling, TJ., Dewhurst, RJ., Walker, AW., Roehe, R. & Watson, M., 28 Feb 2018, In : Nature Communications. 9, 870.

Research output: Contribution to journalArticle

Open Access
File
rumen
cows
genome
carbohydrate metabolism
cattle
1 Citation (Scopus)
2 Downloads (Pure)
Open Access
File
Medicago
Lolium
Rumen
Diet
Poaceae
1 Citation (Scopus)
3 Downloads (Pure)

Fat accretion measurements strengthen the relationship between feed conversion efficiency and nitrogen isotopic discrimination while rumen microbial genes contribute little

Meale, SJ., Auffret, MD., Watson, M., Morgavi, DP., Cantalapiedra-Hijar, G., Duthie, C-A., Roehe, R. & Dewhurst, RJ., 1 Mar 2018, In : Scientific Reports. 8, 1, 7 p., 3854.

Research output: Contribution to journalArticle

Open Access
File
Microbial Genes
Rumen
Nitrogen
Fats
Nitrates
10 Citations (Scopus)

Identification, comparison and validation of robust rumen microbial biomarkers for methane emissions using diverse Bos taurus breeds and basal diets

Auffret, MD., Stewart, R., Dewhurst, RJ., Duthie, C-A., Rooke, JA., Wallace, RJ., Freeman, TC., Snelling, TJ., Watson, M. & Roehe, R., 9 Jan 2018, In : Frontiers in Microbiology. 8, 15 p., 2642.

Research output: Contribution to journalArticle

Open Access
File
Rumen
Methane
Biomarkers
Diet
Metagenomics
relative abundance
methane
cattle
microbial community
bovine
1 Downloads (Pure)
Open Access
File
kale
liveweight gain
sowing date
dry matter intake
body condition
2017
7 Citations (Scopus)
9 Downloads (Pure)

Compositional mixed modelling of methane emissions and ruminal volatile fatty acids from individual cattle and multiple experiments

Palarea-Albaladejo, J., Rooke, JA., Nevison, IM. & Dewhurst, RJ., 8 Jun 2017, In : Journal of Animal Science. 95, 6, p. 2467 - 2480 14 p.

Research output: Contribution to journalArticle

Open Access
File
volatile fatty acids
methane
cattle
butyrates
concentrates
7 Citations (Scopus)
12 Downloads (Pure)

Integrated metagenomic analyses of the rumen microbiome of cattle reveals key biological mechanisms associated with methane traits

Wang, H., Zheng, H., Browne, F., Roehe, R., Dewhurst, RJ., Engel, F., Hemmje, M., Lu, X. & Walsh, P., 9 Jun 2017, In : Methods. 124, p. 108 - 119 12 p.

Research output: Contribution to journalArticle

Open Access
File
methane
rumen
cattle
genes
methane production
3 Citations (Scopus)

Nitrogen isotopic fractionation as a biomarker for nitrogen use efficiency in ruminants: a meta analysis

Cantalapiedra-Hijar, G., Dewhurst, RJ., Cheng, L., Cabrita, ARJ., Fonseca, AJM., Noziere, P., Makowski, D., Fouillet, H. & Ortigues-Marty, I., 29 Dec 2017, In : Animal. 12, 9, p. 1827 - 1837 11 p.

Research output: Contribution to journalArticle

Open Access
File
isotope fractionation
nutrient use efficiency
meta-analysis
ruminants
biomarkers
19 Citations (Scopus)
1 Downloads (Pure)

The rumen microbiome as a reservoir of antimicrobial resistance and pathogenicity genes is directly affected by diet in beef cattle

Auffret, MD., Dewhurst, RJ., Duthie, C-A., Rooke, JA., Wallace, RJ., Freeman, TC., Stewart, R., Watson, M. & Roehe, R., 11 Dec 2017, In : Microbiome. 5, 159

Research output: Contribution to journalArticle

Open Access
File
beef cattle
antibiotic resistance
rumen
pathogenicity
diet
2016
87 Citations (Scopus)
1 Downloads (Pure)

Bovine host genetic variation influences rumen microbial methane production with best selection criterion for low methane emitting and efficiently feed converting hosts based on metagenomic gene abundance

Roehe, R., Dewhurst, RJ., Duthie, C-A., Rooke, JA., McKain, N., Ross, DW., Hyslop, JJ., Waterhouse, A., Freeman, TC., Watson, M. & Wallace, RJ., 2016, In : PLoS Genetics. 12, 2, p. 3 - 9 7 p.

Research output: Contribution to journalArticle

Open Access
File
methane production
selection criteria
methane
rumen
genetic variation
2 Citations (Scopus)

The effect of dietary water soluble carbohydrate to nitrogen ratio on nitrogen partitioning and isotopic fractionation of lactating goats offered a high-nitrogen diet

Cheng, L., Edwards, GR., Dewhurst, RJ., Nicol, AM. & Pacheco, D., May 2016, In : Animal. 10, 5, p. 779 - 785 7 p.

Research output: Contribution to journalArticle

isotope fractionation
goats
carbohydrates
milk
nitrogen
2015
18 Citations (Scopus)
2 Downloads (Pure)

Associative effects of ensiling mixtures of sweet sorghum and alfalfa on nutritive value, fermentation and methane characteristics

Zhang, SJ., Chaudhry, AS., Osman, A., Shi, CQ., Edwards, GR., Dewhurst, RJ. & Cheng, L., 2015, In : Animal Feed Science and Technology. 206, p. 29 - 38

Research output: Contribution to journalArticle

Open Access
File
sweet sorghum
silage making
silage
methane
alfalfa
2 Citations (Scopus)

Effects of feed intake and genetics on tissue nitrogen-15 enrichment and feed conversion efficiency in sheep

Cheng, L., Logan, CM., Dewhurst, RJ., Hodge, S., Zhou, H. & Edwards, GR., 2015, In : Journal of Animal Science. 93, 12, p. 5849 - 5855

Research output: Contribution to journalArticle

wool
liveweight gain
feed conversion
feed intake
blood plasma

Effects of supplementing a mixed diet with echium (Echium plantagineum) oil on methanogenesis in a rumen simulation system

Amaro, P., Maia, MRG., Dewhurst, RJ., Fonseca, AJM. & Cabrita, ARJ., 2015, In : Journal of Animal and Feed Sciences. 24, 1, p. 3 - 10 8 p.

Research output: Contribution to journalArticle

Open Access
File
Echium plantagineum
Echium
methane production
rumen
oils
2014
4 Citations (Scopus)

Analysis of major fatty acids in milk produced from high-quality grazed pasture

Rugoho, I., Liu, Y. & Dewhurst, R. J., 15 Jul 2014, In : New Zealand Journal of Agricultural Research. 57, 3, p. 165-179

Research output: Contribution to journalArticle

pastures
fatty acids
milk
neutral detergent fiber
crude protein
4 Citations (Scopus)
grass silage
glycerol
concentrates
feces
cattle
6 Citations (Scopus)

Nitrogen partitioning, energy use efficiency and isotopic fractionation measurements from cows differing in genetic merit fed low-quality pasture in late lactation

Cheng, L., Woodward, SL., Dewhurst, RJ., Zhou, H. & Edwards, GR., 2014, In : Animal Production Science. 54, 10, p. 1651 - 1656 6 p.

Research output: Contribution to journalArticle

Open Access
File
isotope fractionation
genetic merit
late lactation
pastures
cows
10 Citations (Scopus)

Plasma nitrogen isotopic fractionation and feed efficiency in growing beef heifers

Wheadon, N. M., McGee, M., Edwards, G. R. & Dewhurst, R. J., 14 May 2014, In : British Journal of Nutrition. 111, 9, p. 1705-1711

Research output: Contribution to journalArticle

isotope fractionation
beef cattle
feed conversion
nitrogen
heifers
6 Citations (Scopus)

Short communication: Relationship between the efficiency of utilization of feed nitrogen and 15N enrichment in casein from lactating dairy cows

Cabrita, ARJ., Fonseca, AJM. & Dewhurst, RJ., 2014, In : Journal of Dairy Science. 97, 11, p. 7225 - 7229 5 p.

Research output: Contribution to journalArticle

Open Access
File
animal communication
casein
rumen
feed conversion
dairy cows
7 Citations (Scopus)

Using archaeol to investigate the location of methanogens in the ruminant digestive tract

McCartney, C. A., Bull, I. D. & Dewhurst, R. J., Jun 2014, In : Livestock Science. 164, p. 39-45

Research output: Contribution to journalArticle

2013
24 Citations (Scopus)

Assessment of archaeol as a molecular proxy for methane production in cattle

McCartney, C. A., Bull, I. D., Yan, T. & Dewhurst, R. J., Feb 2013, In : Journal of Dairy Science. 96, 2, p. 1211-1217

Research output: Contribution to journalArticle

methane production
methane
methanogens
rumen
feces
1 Citation (Scopus)

Effects of protein sources on concentrations of hydrogen sulphide in the rumen headspace gas of dairy cows

Fonseca, A. J. M., Cabrita, A. R. J., Pinho, L. A. O., Kim, E. J. & Dewhurst, R. J., Jan 2013, In : Animal. 7, 1, p. 75-81

Research output: Contribution to journalArticle

hydrogen sulfide
headspace analysis
protein sources
rumen
corn gluten
7 Citations (Scopus)

Technical note: Comparison of biomarker and molecular biological methods for estimating methanogen abundance

McCartney, C. A., Bull, I. D., Waters, S. M. & Dewhurst, R. J., Dec 2013, In : Journal of Animal Science. 91, 12, p. 5724-5728

Research output: Contribution to journalArticle

methanogens
Ruminants
biomarkers
Methanobrevibacter
Biomarkers
12 Citations (Scopus)

Technical note: Nitrogen isotopic fractionation can be used to predict nitrogen-use efficiency in dairy cows fed temperate pasture

Cheng, L., Sheahan, A. J., Gibbs, S. J., Rius, A. G., Kay, J. K., Meier, S., Edwards, G. R., Dewhurst, R. J. & Roche, J. R., 2013, In : Journal of Animal Science. 91, 12

Research output: Contribution to journalArticle

9 Citations (Scopus)

The effects of dietary nitrogen to water-soluble carbohydrate ratio on isotopic fractionation and partitioning of nitrogen in non-lactating sheep

Cheng, L., Nicol, A. M., Dewhurst, R. J. & Edwards, G. R., Aug 2013, In : Animal. 7, 8, p. 1274-1279

Research output: Contribution to journalArticle

isotope fractionation
carbohydrates
sheep
urea
nitrogen
2012
6 Citations (Scopus)

Effect of grass dry matter intake and fat supplementation on progesterone metabolism in lactating dairy cows

Hutchinson, I. A., Dewhurst, R. J., Evans, A. C. O., Lonergan, P. & Butler, S. T., 2012, In : Theriogenology. 78, 4, p. 878-886

Research output: Contribution to journalArticle

22 Citations (Scopus)

Effect of supplementation with different fat sources on the mechanisms involved in reproductive performance in lactating dairy cattle

Hutchinson, I. A., Hennessy, A. A., Waters, S. M., Dewhurst, R. J., Evans, A. C. O., Lonergan, P. & Butler, S. T., 2012, In : Theriogenology. 78, 1, p. 12-27

Research output: Contribution to journalArticle

4 Citations (Scopus)

Effects of increasing levels of stearidonic acid on methane production in a rumen in vitro system

Amaro, P., Maia, M. R. G., Dewhurst, R. J., Fonseca, A. J. M. & Cabrita, A. R. J., 2012, In : Animal Feed Science and Technology. 173, 3-4, p. 252-260

Research output: Contribution to journalArticle

methane production
rumen
biohydrogenation
acids
methane
17 Citations (Scopus)
2011
16 Citations (Scopus)

Analysis of archaeal ether lipids in bovine faeces

Gill, F. L., Dewhurst, R. J., Evershed, R. P., McGeough, E., O'Kiely, P., Pancost, R. D. & Bull, I. D., 23 Jun 2011, In : Animal Feed Science and Technology. 167-67, p. 87-92

Research output: Contribution to journalArticle

ethers
Archaea
feces
sulfur hexafluoride
methanogens
17 Citations (Scopus)

Effects of dietary protein concentration and balance of absorbable amino acids on productive responses of dairy cows fed corn silage-based diets

Cabrita, A. R. J., Dewhurst, R. J., Melo, D. S. P., Moorby, J. M. & Fonseca, A. J. M., 2011, In : Journal of Dairy Science. 94, 9, p. 4647-4656

Research output: Contribution to journalArticle

corn silage
dietary protein
rumen
dairy cows
crude protein
18 Citations (Scopus)

Effects of lipid-encapsulated conjugated linoleic acid supplementation on milk production, bioenergetic status and indicators of reproductive performance in lactating dairy cows

Hutchinson, I., de Veth, M. J., Stanton, C., Dewhurst, R. J., Lonergan, P., Evans, A. C. O. & Butler, S. T., Aug 2011, In : Journal of Dairy Research. 78, 3, p. 308-317

Research output: Contribution to journalArticle

conjugated linoleic acid
energy metabolism
milk production
reproductive performance
dairy cows
27 Citations (Scopus)

Nitrogen partitioning and isotopic fractionation in dairy cows consuming diets based on a range of contrasting forages

Cheng, L., Kim, E. J., Merry, R. J. & Dewhurst, R. J., 2011, In : Journal of Dairy Science. 94, 4, p. 2031-2041

Research output: Contribution to journalArticle

isotope fractionation
Trifolium pratense
dairy cows
silage
forage
37 Citations (Scopus)

SIMSDAIRY: A modelling framework to identify sustainable dairy farms in the UK. Framework description and test for organic systems and N fertiliser optimisation

Del Prado, A., Misselbrook, T., Chadwick, D., Hopkins, A., Dewhurst, R. J., Davison, P., Butler, A., Schroder, J. & Scholefield, D., Sep 2011, In : Science of the Total Environment. 409, 19, p. 3993-4009

Research output: Contribution to journalArticle

dairy farming
nitrogen fertilizers
biodiversity
milk
animal welfare
2010
28 Citations (Scopus)

Archaeol - a biomarker for foregut fermentation in modern and ancient herbivorous mammals?

Gill, FL., Dewhurst, RJ., Dungait, JAJ., Evershed, RP., Ives, L., Li, CS., Pancost, RD., Sullivan, M., Bera, S. & Bull, ID., May 2010, In : Organic Geochemistry. 41, 5, p. 467-472

Research output: Contribution to journalArticle

feces
fermentation
biomarker
mammal
coprolite
2 Citations (Scopus)

Effects of forage NDF content and body condition score on forage intake by Holstein-Friesian dairy cows in the dry period

Dewhurst, RJ., Davies, DWR. & Fisher, WJ., Jan 2010, In : Animal. 4, 1, p. 76-80

Research output: Contribution to journalArticle

dry period (lactation)
body condition
Holstein
dairy cows
feed intake
11 Citations (Scopus)

Effects of mixtures of red clover and maize silages on the partitioning of dietary nitrogen between milk and urine by dairy cows

Dewhurst, RJ., Davies, LJ. & Kim, EJ., May 2010, In : Animal. 4, 5, p. 732-738

Research output: Contribution to journalArticle

Trifolium pratense
corn silage
grass silage
urine
dairy cows
2009
17 Citations (Scopus)

Effects of dietary starch source and buffers on milk responses and rumen fatty acid biohydrogenation in dairy cows fed maize silage-based diets

Cabrita, ARJ., Vale, JMP., Bessa, RJB., Dewhurst, RJ. & Fonseca, AJM., Aug 2009, In : Animal Feed Science and Technology. 152, 3-4, p. 267-277

Research output: Contribution to journalArticle

biohydrogenation
dietary carbohydrate
corn silage
rumen
buffers
3 Citations (Scopus)

Effects of silage digestibility on intake and body reserves of dry cows and performance in the first part of the next lactation

Dewhurst, RJ., Davies, DWR. & Fisher, WJ., Dec 2009, In : Animal. 3, 12, p. 1721-1727

Research output: Contribution to journalArticle

dry period (lactation)
silage
lactation
digestibility
cows
57 Citations (Scopus)

Nutritive value of forage legumes used for grazing and silage

Dewhurst, RJ., Delaby, L., Moloney, A., Boland, T. & Lewis, E., 2009, In : Irish Journal of Agricultural and Food Research. 48, 2, p. 167-187

Research output: Contribution to journalArticle

20 Citations (Scopus)

Using microbial fatty acids to improve understanding of the contribution of solid associated bacteria to microbial mass in the rumen

Bessa, RJB., Maia, MRG., Jeronimo, E., Belo, AT., Cabrita, ARJ., Dewhurst, RJ. & Fonseca, AJM., Apr 2009, In : Animal Feed Science and Technology. 150, 3-4, p. 197-206

Research output: Contribution to journalArticle

odd chain fatty acids
branched chain fatty acids
purines
rumen
fatty acids
2007
30 Citations (Scopus)

Apparent recovery of duodenal odd- and branched-chain fatty acids in milk of dairy cows

Dewhurst, RJ., Moorby, JM., Vlaeminck, B. & Fievez, V., Apr 2007, In : Journal of Dairy Science. 90, 4, p. 1775-1780

Research output: Contribution to journalArticle

odd chain fatty acids
branched chain fatty acids
dairy cows
milk
concentrates
3 Citations (Scopus)
rumen bacteria
liquids
nitrogen
odd chain fatty acids
branched chain fatty acids
42 Citations (Scopus)

Effects of dietary protein and starch on intake, milk production, and milk fatty acid profiles of dairy cows fed corn silage-based diets

Cabrita, ARJ., Bessa, RJB., Alves, SP., Dewhurst, RJ. & Fonseca, AJM., Mar 2007, In : Journal of Dairy Science. 90, 3, p. 1429-1439

Research output: Contribution to journalArticle

dietary carbohydrate
corn silage
dietary protein
milk production
dairy cows
3 Citations (Scopus)

Effects of dietary sulphur sources on concentrations of hydrogen sulphide in the rumen head-space gas of dairy cows

Dewhurst, RJ., Kim, EJ., Evans, RT., Cabrita, ARJ. & Fonseca, AJM., May 2007, In : Animal. 1, 4, p. 531-535

Research output: Contribution to journalArticle

hydrogen sulfide
headspace analysis
rumen
sulfur
dairy cows
20 Citations (Scopus)

Effects of fatty acid oxidation products (green odor) on rumen bacterial populations and lipid metabolism in vitro

Lee, MRF., Huws, SA., Scollan, ND. & Dewhurst, RJ., Aug 2007, In : Journal of Dairy Science. 90, 8, p. 3874-3882

Research output: Contribution to journalArticle

beta oxidation
hydroperoxides
lipid metabolism
rumen
odors