- Email: email@example.com
- Telephone: +44 (0) 166 183 0222 or (0)191 208 6656
- Fax: +44 (0) 166 183 1006
- Address: Nafferton Ecological Farming Group
Room 4.04a Agriculture Building
I have worked with farmers in the NE for nearly 40 years, mainly offering advice to livestock producers on feeding and forage production. I have been with the university since 1997 and joined the Ecological Farming Group at Nafferton in 2002 to set up a consultancy centre for organic red meat production in a project funded by the DTI.
My current research is considering the impact of organic or low input management on product quality, primarily looking at animal fats; learning lessons how we can produce dairy produce, meat and eggs that are better for our health.
I teach undergraduate students, running a module Agriculture and the Environment for Agriculture and Environmental Science students, along with involvement on ruminant production and feed related modules. On the postgraduate area, I lead the livestock production module on the MSc in Organic farming and food production systems and have PhD students working on product quality in milk and eggs.
As a member of the Soil Association’s Farmer Grower Board and a committee member of Northumberland Organic Producers, Gillian is aware of issues facing organic producers, both locally and at a national level.
My research investigates the effects of management on animal health and product quality– also considering the potential impact on consumer health. Generally less intensive production results in milk or meat likely to less damaging to our health and much of my research is to identify why then explore the scope to introduce key aspects of management into mainstream production systems.
Recent projects include:
DEFRA Sustainable Intensification Research Platform In practice the sustainable intensification of farming involves simultaneously increasing farm output and competitiveness, whilst protecting the countryside and enhancing the environment (see: http://www.siplatform.org.uk/ ) Nafferton Farm is one of the 5 farming platforms involved in this key research.
ProPIG: Reducing the environmental impact by improving health, welfare and nutrition of organic pigs This is an European Union ERA-net CORE Organic II project, with co-ordinated research funding from individual member states. UK contribution comes from DEFRA’s Animal Health and Veterinary laboratories Agency
LowInputBreeds : Developing an integrated livestock breeding and management strategies to improve animal health, product quality and performance in European organic and ‘low input’ milk, meat and egg production. Key facts and figures:
- 5-year EU Collaborative Project, funded under the Seventh Framework Programme of the European Community for Research, Technological Development and Demonstration Activities
- Contract No. 222623
- 94 person-years of research
- Over 60 scientists
- 21 leading research and industrial organisations
- 15 countries
- 4 livestock species: cattle (dairy and beef), sheep (dairy and meat), pigs, poultry
- Running from 2009-2014
- Project coordination: Newcastle University and Research Institute of Organic Agriculture FiBL
Agriculture and the Environment (Module Leader)
Ruminant Livestock (Module Leader)
Animal Feed Technology
Rural Enterprise Diversification
Animal Welfare and Environment
Post Graduate Teaching
Ecological Livestock Production Systems (Module Leader)
Ecological Crop Production Systems
Ecological and Sustainable Farming Standards and Quality Assurance
- Stergiadis S, Bieber A, Franscheschin E, Isensee A, Eyre MD, Maurer V, Chatzidimitriou E, Cozzi G, Bapst B, Steward G, Gordon A, Butler G. Impact of US Brown Swiss genetics on milk quality from low-input herds in Switzerland: interactions with grazing intake and pasture type. Food Chemistry 2015, 175, 609-618.
- Kamihiro S, Stergiadis S, Leifert C, Eyre M, Butler G. Meat quality and health implications of organic and conventional beef production. Meat Science 2015, 100, 306-318.
- Stergiadis S, Leifert C, Seal CJ, Eyre MD, Larsen MK, Nielsen JH, Slots T, Butler G. A 2-Year study on milk quality of three pasture-based dairy systems of contrasting production intensities in Wales. Journal of Agricultural Science 2015, 153(4), 708-731.
- Butler G. Manipulating dietary PUFA in animal feed: Implications for human health. In: The Nutrition Society Scottish Section meeting: Polyunsaturated fatty acid mediators: implications for human health. 2014, Edinburgh, UK: Cambridge University Press.
- Stergiadis S, Leifert C, Seal CJ, Eyre MD, Steinshamn H, Butler G. Improving the fatty acid profile of winter milk from housed cows with contrasting feeding regimes by oilseed supplementation. Food Chemistry 2014, 164, 293-300.
- Stergiadis S, Seal CJ, Leifert C, Eyre MD, Larsen MK, Butler G. Variation in nutritionally relevant components in retail Jersey and Guernsey whole milk. Food Chemistry 2013, 139(1-4), 540-548.
- Stergiadis S, Leifert C, Seal CJ, Eyre MD, Nielsen JH, Larsen MK, Slots T, Steinshamn H, Butler G. Effect of Feeding Intensity and Milking System on Nutritionally Relevant Milk Components in Dairy Farming Systems in the North East of England. Journal of Agricultural and Food Chemistry 2012, 60(29), 7270-7281.
- Butler G, Stergiadis S, Seal C, Eyre M, Leifert C. Fat composition of organic and conventional retail milk in northeast England. Journal of Dairy Science 2011, 94(1), 24-36.
- Butler G, Nielsen JH, Slots T, Seal C, Eyre MD, Sanderson R, Leifert C. Fatty acid and fat-soluble antioxidant concentrations in milk from high- and low-input conventional and organic systems: seasonal variation. Journal of the Science of Food and Agriculture 2008, 88(8), 1431-1441.
- Benbrook CM, Butler G, Latif MA, Leifert C, Davis DR. Organic Production Enhances Milk Nutritional Quality by Shifting Fatty Acid Composition: A United States-Wide, 18-Month Study. PLoS One 2013, 8(12), e82429.
- Slots T, Butler G, Leifert C, Kristensen T, Skibsted LH, Nielsen JH. Potentials to differentiate milk composition by different feeding strategies. Journal of Dairy Science 2009, 92(5), 2057-2066.
- Larsen MK, Nielsen JH, Butler G, Leifert C, Slots T, Kristiansen GH, Gustafsson AH. Milk quality as affected by feeding regimens in a country with climatic variation. Journal of Dairy Science 2010, 93(7), 2863-2873.
- Butler G, Stergiadis S. Suitability of bronopol preservative treated milk for fatty acid determination. Journal of Dairy Research 2011, 78(2), 220-225.
- Butler G, Collomb M, Rehberger B, Sanderson R, Eyre M, Leifert C. Conjugated linoleic acid isomer concentrations in milk from high- and low-input management dairy systems. Journal of the Science of Food and Agriculture 2009, 89(4), 697-705.
- Kamihiro S, Stergiadis S, Leifert C, Eyre MD, Butler G. Fatty acid compositionof retail organic and non-organic beef in North East England. In: British Society of Animal Science and the Association of Veterinary Teaching and Research Work. 2012, Nottingham, UK: Cambridge University Press.
- Wagenaar JP, Klocke P, Butler G, Smolders G, Nielsen JH, Canever A, Leifert C. Effect of production system, alternative treatments and calf rearing system on udder health in organic dairy cows. NJAS Wageningen Journal of Life Sciences 2011, 58(3-4), 157-162.
- Cooper JM, Butler G, Leifert C. Life cycle analysis of greenhouse gas emissions from organic and conventional food production systems, with and without bio-energy options. NJAS - Wageningen Journal of Life Sciences 2011, 58(3-4), 185-192.
- Butler G, Nielsen JH, Larsen MK, Rehberger B, Stergiadis S, Canever A, Leifert C. The effects of dairy management and processing on quality characteristics of milk and dairy products. NJAS Wageningen Journal of Life Sciences 2011, 58(3-4), 97-102.
- Klocke P, Ivemeyer S, Butler G, Maeschli A, Heil F. A randomized controlled trial to compare the use of homeopathy and internal Teat Sealers for the prevention of mastitis in organically farmed dairy cows during the dry period and 100 days post-calving. Homeopathy 2010, 99(2), 90-98.
- Ivemeyer S, Walkenhorst M, Heil F, Notz C, Maeschli A, Butler G, Klocke P. Management factors affecting udder health and effects of a one year extension program in organic dairy herds. Animal 2009, 3(11), 1596-1604.
- Stergiadis S, Leifert C, Seal CJ, Eyre MD, Butler G. Fatty acid composition of milk produced under systems of different intensity and milking practices in the North East of England. In: British Society of Animal Science and the Association of Veterinary Teaching and Research Work. 2011, Nottingham, UK: Cambridge University Press.
- Stergiadis S, Leifert C, Seal CJ, Eyre MD, Butler G. Individual cow variation on milk polyunsaturated fatty acids. In: Scottish Section Meeting: Polyunsaturated fatty acid mediators: implications for human health. 2013, Edinburgh, UK: Cambridge University Press.
- Stergiadis S, Bieber A, Francheschin E, Isensee A, Eyre MD, Maurer V, Chatzidimitriou E, Cozzi G, Bapst B, Stewart G, Gordon A, Butler G, Leifert C. Crossbreeding low-input dairy cows in Switzerland with US Brown Swiss: effect on summer milk fatty acid profile. In: British Society of Animal Science Annual Conference. 2015, Chester, UK: Cambridge University Press.
- Chatzidimitriou E, Stergiadis S, Eyre MD, Bestman M, van-Niekerk T, Butler G. Effect of management practices on fatty acid composition of chicken eggs. A farm survey in the Netherlands. In: UK World's Poultry Science Association Spring meeting. 2015, Chester, UK.
- Bieber A, Stergiadis S, Franceschin E, Isensee A, Eyre MD, Maurer V, Chatzidimitriou E, Cozzi G, Bapst GB, Stewart G, Gordon A, Butler G, Leifert C. Einfluss von Brown Swiss Genetik und Weidegang auf die Fettsäurezusammensetzung von Kuhmilch. In: Swiss Association for Animal Production. 2015, Zollikofen, Switzerland: HAFL.
- Bieber A, Stergiadis S, Franceschin E, Isensee A, Eyre MD, Maurer V, Chatzidimitriou E, Cozzi G, Bapst B, Stewart G, Gordon A, Butler G, Leifert C. Influence of Brown Swiss genetics and grazing on the fatty acid composition of cow's milk in low-input systems. In: Healthy and productive animals: should we adapt the genotype to the feed or vis versa? ETH Series for Animal Nutrition (in German). 2015.
- Bieber A, Stergiadis S, Franceschin E, Isensee A, Eyre MD, Maurer V, Chatzidimitriou E, Cozzi G, Bapst B, Stewart G, Gordon A, Butler G, Leifert C. Influence of US Brown Swiss genetics and grazing on bovine milk fatty acid profile. In: Proceedings of the Swiss Association for Animal production Annual Conference (in German). 2015.
- Srednicka-Tober D, Baranski M, Seal CJ, Sanderson R, Benbrook C, Steinshamn H, Gromadzka-Ostrowska J, Rembialkowska E, Skwarlo-Sonta K, Eyre M, Cozzi G, Larsen MK, Jordon T, Niggli U, Sakowski T, Calder PC, Burdge GC, Sotiraki S, Stefanakis A, Yolcu H, Stergiadis S, Chatzidimitriou E, Butler G, Stewart G, Leifert C. Composition differences between organic and conventional meat: a systematic literature review and meta-analysis. British Journal of Nutrition 2016, 115(6), 994-1011.
- Srednicka-Tober D, Baranski M, Seal CJ, Sanderson R, Benbrook C, Steinshamn H, Gromadzka-Ostrowska J, Rembialkowska E, Skwarlo-Sonta K, Eyre M, Cozzi G, Larsen MK, Jordon T, Niggli U, Sakowski T, Calder PC, Burdge GC, Sotiraki S, Stefanakis A, Stergiadis S, Yolcu H, Chatzidimitriou E, Butler G, Stewart G, Leifert C. Higher PUFA and n-3 PUFA, conjugated linoleic acid, α-tocopherol and iron, but lower iodine and selenium concentrations in organic milk: a systematic literature review and meta- and redundancy analyses. British Journal of Nutrition 2016, 115(6), 1043-1060.
- Chatzidimitriou E, Maurer V, Leiber F, Baranski M, Stergiadis S, Butler G. The effect of insect meal on egg fatty acid profile. In: 67th Annual Meeting of the European Association of Animal Production. 2016, Belfast, UK: Wageningen Academic Publishers.