Phil Garnsworthy

Contact

• workSutton Bonington Campus
  Sutton Bonington
  Leicestershire
  LE12 5RD
  UK
• Phil.Garnsworthy@nottingham.ac.uk

Biography

Note that Phil is an Emeritus Professor, so does not take on new PhD students.

Expertise Summary

Phil's research encompasses all aspect of dairy science with particular emphasis on nutrition.

Recent research projects include:

Feed efficiency and sustainability of dairy systems

Variation in methane emissions by individual dairy cows measured on-farm

Nutritive value of co-products from the bioethanol industry

Rumen function in relation to the microbiome, the cow genome, and digestive efficiency

Manipulation of milk fatty acid profile by nutrition and genetics

Nutritional strategies for enhancing dairy cow fertility

Research Summary

Phil's main area of interest lies in the nutrition of dairy cows and how to maximise efficiency of feed utilization for milk production without compromising reproductive performance, thereby… read more

Selected Publications

• GARNSWORTHY, PHILIP C., SAUNDERS, NEIL and GOODMAN, JENNIFER R., 2024. Evaluation of a novel palm-free fat supplement to reduce the carbon footprint of diets for dairy cows ANIMAL FEED SCIENCE AND TECHNOLOGY. 314,
• HARDAN, ALI, GARNSWORTHY, PHILIP C. C. and BELL, MATT J. J., 2023. Variability in Enteric Methane Emissions among Dairy Cows during Lactation ANIMALS. 13(1),
• FREGULIA, PRISCILA, CAMPOS, MARIANA MAGALHAES, DIAS, ROBERTO JUNIO PEDROSO, LIU, JUNHONG, GUO, WEI, PEREIRA, LUIZ GUSTAVO RIBEIRO, MACHADO, MARCO ANTONIO, FAZA, DANIELE RIBEIRO DE LIMA REIS, GUAN, LE LUO, GARNSWORTHY, PHIL C. and NEVES, ANDRE LUIS ALVES, 2022. Taxonomic and predicted functional signatures reveal linkages between the rumen microbiota and feed efficiency in dairy cattle raised in tropical areas FRONTIERS IN MICROBIOLOGY. 13,
• NEGUSSIE, ENYEW, GONZALEZ-RECIO, OSCAR, BATTAGIN, MARA, BAYAT, ALI-REZA, BOLAND, TOMMY, DE HAAS, YVETTE, GARCIA-RODRIGUEZ, ASER, GARNSWORTHY, PHILIP C., GENGLER, NICOLAS, KREUZER, MICHAEL, KUHLA, BJOERN, LASSEN, JAN, PEIREN, NICO, PSZCZOLA, MARCIN, SCHWARM, ANGELA, SOYEURT, HELENE, VANLIERDE, AMELIE, YAN, TIANHAI and BISCARINI, FILIPPO, 2022. Integrating heterogeneous across-country data for proxy-based random forest prediction of enteric methane in dairy cattle JOURNAL OF DAIRY SCIENCE. 105(6), 5124-5140

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Current Research

Phil's main area of interest lies in the nutrition of dairy cows and how to maximise efficiency of feed utilization for milk production without compromising reproductive performance, thereby minimising environmental impact.

Current projects focus on Whole Farm Feed Efficiency and reducing the Carbon Footprint of Dairy Farms.

Phil led a Research Partnership funded by AHDB, the UK dairy industry body, investigating Animal Health, Welfare and Nutrition. Partners in the project were the Nottingham Vet School, Harper Adams University College, RVC, Bristol University, SAC and IBERS.

Phil has presented invited keynote papers at international conferences in more than 30 countries and regularly gives talks to advisors and farmers about the findings of his research.

Past Research

Methane and ammonia emissions

Phil developed a model to calculate the impact of dairy systems on environmental emissions, which is based on nutritional and physiological principles, rather than standard values per animal. The primary driver of total emissions at the herd or national level is the number of animals per unit of output. This is heavily influenced by fertility and the model shows that if fertility of UK cows was improved to the level achieved by the best herds, national methane and ammonia emissions would be reduced by approximately 20%.

In 2007 Phil and his team developed a novel method for measuring methane emissions by individual dairy cows during milking. This involves sampling the breath of cows and recording how often they belch. With funding from Defra, the method was calibrated against daily methane output by cows in respiration chambers. The method is currently being used to assess variability among thousands of cows on commercial dairy farms to inform the national greenhouse gas inventory.

Phil was a partner in the 7.7m Euro EU FP7 project RuminOmics, which connected the animal genome, gastrointestinal microbiomes and nutrition to improve digestion efficiency and the environmental impacts of ruminant livestock production. The main finding was a core rumen microbiome that is heritable and related to methane emissions and feed efficiency.

Body condition score in dairy cows

Interest in body condition score of dairy cows started when Phil was registered for a PhD at Aberdeen University. Whilst studying voluntary food intake, he tried to explain why dairy cows have a delay between peak milk yield and maximum appetite. At that time, advisers recommended calving cows with a condition score of 3.5 to allow them to "milk off their backs". In two experiments, he demonstrated that body fat inhibits food intake so the delay was actually caused by management practices. Thin cows (condition score 2 at calving) had greater appetites and produced milk directly from food, which is more efficient. Maximum appetite of thin cows coincided with peak milk yield. In later experiments at Nottingham Phil showed that body fat mobilisation is dependent not only on the degree of fatness, but also on dietary protein and energy concentrations. As a result of this series of experiments, recommended condition scores at calving have been reduced. The work has been replicated and inspired novel research and updated recommendations throughout the world.

Milk composition

Phil has conducted several large studies on nutritional and genetic factors influencing milk fatty acid composition. The primary aim is to improve the fatty acid profile of milk by reducing the proportion of saturated fatty acids and increasing proportions of monounsaturated and polyunsaturated fatty acids. Of particular interest is conjugated linoleic acids (CLA), which potentially have tremendous health benefits for humans. They are anticarcinogenic, anti-diabetic and anti-atherogenic; they alter nutrient partitioning away from body fat and improve the immune system. A major source of CLA is cow's milk. Phil led studies looking at seasonal variation in the CLA content of milk and mechanisms by which CLA is produced by cows in the rumen and mammary gland. This work showed that 80% of CLA is synthesised in the mammary gland via the desaturase enzyme system. In a study of 10,000 cows, it was shown that desaturase activity has a heritability of 30%, so there are opportunities to breed cows for healthier milk.

Food intake prediction

The main limitation to milk production by dairy cows is food intake. Phil investigated the use of alkanes for measuring food intake of cows fed under group conditions. Alkanes are inert waxes found naturally in plants and have been used for predicting intake in grazing sheep. Phil developed the technique for cows fed on silage so that intake can be predicted from a sample of faeces from representative cows. Subsequently, he found that near-infrared spectroscopy can also provide accurate measurements of food intake from faecal samples.

Rumen synchrony

Studies of rumen fermentation have concentrated on synchronising the supply of energy and nitrogen to rumen microbes. A computer model was developed that predicted the hourly supply of nutrients from degradation characteristics of feed ingredients. In sheep, synchronising energy and nitrogen supply leads to significant increases in microbial efficiency of nitrogen capture. The work was extended to lactating dairy cows, but it was found that these animals have various strategies for overcoming the effects of asynchronous diets. Diet selection and control of meal size and feeding pattern are two strategies. Recycling of nitrogen in the rumen is doubled with asynchronous diets and the rumen microbes increase their storage of polysaccharides.

Fertility

In collaboration with Bob Webb at Nottingham, the Roslin Institute and SAC Aberdeen, Phil demonstrated that nutrition has major influences on fertility in dairy cows and beef heifers. Diets designed to increase blood insulin concentrations led to earlier resumption of cyclic activity and improved conception rates in postpartum dairy cows. However, although pregnancy rates are increased by a high-insulin diet, very high concentrations of insulin may be detrimental to embryo development. The project also investigated effects of individual dietary components on plasma insulin in dairy cows, in order to develop models to predict the implications of different feeding strategies for reproduction. Using this information, dietary strategies were designed to alter blood insulin at critical stages of the reproductive cycle resulting in significant improvements in pregnancy rate.

• GARNSWORTHY, PHILIP C., SAUNDERS, NEIL and GOODMAN, JENNIFER R., 2024. Evaluation of a novel palm-free fat supplement to reduce the carbon footprint of diets for dairy cows ANIMAL FEED SCIENCE AND TECHNOLOGY. 314,
• HARDAN, ALI, GARNSWORTHY, PHILIP C. C. and BELL, MATT J. J., 2023. Variability in Enteric Methane Emissions among Dairy Cows during Lactation ANIMALS. 13(1),
• FREGULIA, PRISCILA, CAMPOS, MARIANA MAGALHAES, DIAS, ROBERTO JUNIO PEDROSO, LIU, JUNHONG, GUO, WEI, PEREIRA, LUIZ GUSTAVO RIBEIRO, MACHADO, MARCO ANTONIO, FAZA, DANIELE RIBEIRO DE LIMA REIS, GUAN, LE LUO, GARNSWORTHY, PHIL C. and NEVES, ANDRE LUIS ALVES, 2022. Taxonomic and predicted functional signatures reveal linkages between the rumen microbiota and feed efficiency in dairy cattle raised in tropical areas FRONTIERS IN MICROBIOLOGY. 13,
• NEGUSSIE, ENYEW, GONZALEZ-RECIO, OSCAR, BATTAGIN, MARA, BAYAT, ALI-REZA, BOLAND, TOMMY, DE HAAS, YVETTE, GARCIA-RODRIGUEZ, ASER, GARNSWORTHY, PHILIP C., GENGLER, NICOLAS, KREUZER, MICHAEL, KUHLA, BJOERN, LASSEN, JAN, PEIREN, NICO, PSZCZOLA, MARCIN, SCHWARM, ANGELA, SOYEURT, HELENE, VANLIERDE, AMELIE, YAN, TIANHAI and BISCARINI, FILIPPO, 2022. Integrating heterogeneous across-country data for proxy-based random forest prediction of enteric methane in dairy cattle JOURNAL OF DAIRY SCIENCE. 105(6), 5124-5140
• HARDAN, ALI, GARNSWORTHY, PHILIP C. and BELL, MATT J., 2022. Detection of Methane Eructation Peaks in Dairy Cows at a Robotic Milking Station Using Signal Processing ANIMALS. 12(1),
• BOUGOUIN, A., HRISTOV, A., DIJKSTRA, J., AGUERRE, M. J., AHVENJARVI, S., ARNDT, C., BANNINK, A., BAYAT, A. R., BENCHAAR, C., BOLAND, T., BROWN, W. E., CROMPTON, L. A., DEHARENG, F., DUFRASNE, I., EUGENE, M., FROIDMONT, E., VAN GASTELEN, S., GARNSWORTHY, P. C., HALMEMIES-BEAUCHET-FILLEAU, A., HERREMANS, S., HUHTANEN, P., JOHANSEN, M., KIDANE, A., KREUZER, M., KUHLA, B., LESSIRE, F., LUND, P., MINNEE, E. M. K., MUNOZ, C., NIU, M., NOZIERE, P., PACHECO, D., PRESTLOKKEN, E., REYNOLDS, C. K., SCHWARM, A., SPEK, J. W., TERRANOVA, M., VANHATALO, A., WATTIAUX, M. A., WEISBJERG, M. R., YANEZ-RUIZ, D. R., YU, Z. and KEBREAB, E., 2022. Prediction of nitrogen excretion from data on dairy cows fed a wide range of diets compiled in an intercontinental database: A meta-analysis JOURNAL OF DAIRY SCIENCE. 105(9), 7462-7481
• GILL, M., GARNSWORTHY, P. C. and WILKINSON, J. M., 2021. Review: More effective linkages between science and policy are needed to minimize the negative environmental impacts of livestock production ANIMAL. 15(1, SI),
• VARGAS-BELLO-PEREZ, EINAR, LOOR, JUAN J. and GARNSWORTHY, PHILIP C., 2021. Short-Term Variations of C18:1 Trans Fatty Acids in Plasma Lipoproteins and Ruminal Fermentation Parameters of Non-Lactating Cows Subjected to Ruminal Pulses of Oils ANIMALS. 11(3),
• GARNSWORTHY, PHILIP C., SAUNDERS, NEIL, GOODMAN, JENNIFER R. and MARSDEN, MICHAEL, 2021. Evaluation of rumen protected rapeseed expeller (NovaPro) as an alternative to soya bean meal in dairy cow diets ANIMAL FEED SCIENCE AND TECHNOLOGY. 273,
• GARNSWORTHY, PHILIP C., MARSDEN, MICHAEL, GOODMAN, JENNIFER R. and SAUNDERS, NEIL, 2021. Inclusion of Wheat Dried Distillers' Grains with Solubles from Bioethanol Plants in Diets for Dairy Cows ANIMALS. 11(1),
• VARGAS-BELLO-PEREZ, EINAR, CANCINO-PADILLA, NATHALY, GELDSETZER-MENDOZA, CAROLINA, MORALES, MARIA SOL, LESKINEN, HEIDI, GARNSWORTHY, PHILIP C., LOOR, JUAN J. and ROMERO, JAIME, 2020. Effects of dietary polyunsaturated fatty acid sources on expression of lipid-related genes in bovine milk somatic cells SCIENTIFIC REPORTS. 10(1),
• VARGAS-BELLO-PEREZ, EINAR, LOOR, JUAN J. and GARNSWORTHY, PHILIP C., 2020. Fatty acid transport in plasma from cows treated with ruminal pulses of fish oil and partially hydrogenated vegetable oil LIVESTOCK SCIENCE. 236,
• VARGAS-BELLO-PEREZ, E., CANCINO-PADILLA, N., GELDSETZER-MENDOZA, C., MORALES, M. S., LESKINEN, H., GARNSWORTHY, P. C., LOOR, J. J. and ROMERO, J., 2020. Effects of dietary polyunsaturated fatty acid sources on lipid-related genes in bovine milk somatic cells. JOURNAL OF DAIRY SCIENCE. 103(1), 98-99
• VARGAS-BELLO-PEREZ, EINAR, BIONAZ, MASSIMO, GARRIDO-SARTORE, MACARENA, CANCINO-PADILLA, NATHALY, MORALES, MARIA SOL, ROMERO, JAIME, LESKINEN, HEIDI, GARNSWORTHY, PHILIP C. and LOOR, JUAN J., 2020. Effect of Soybean Oil and Fish Oil on Lipid-Related Transcripts in Subcutaneous Adipose Tissue of Dairy Cows ANIMALS. 10(1),
• VARGAS-BELLO-PEREZ, EINAR, GELDSETZER-MENDOZA, CAROLINA, CANCINO-PADILLA, NATHALY, MORALES, MARIA SOL, LESKINEN, HEIDI, GARNSWORTHY, PHILIP C., LOOR, JUAN J. and ROMERO, JAIME, 2020. Effects of Dietary Vegetable Oils on Mammary Lipid-Related Genes in Holstein Dairy Cows ANIMALS. 10(1),
• BELL, MJ, CRAIGON, J, SAUNDERS, N, GOODMAN, JR and GARNSWORTHY, PC, 2018. Does the diurnal pattern of enteric methane emissions from dairy cows change over time? animal. 1-6
• VARGAS-BELLO-PÉREZ E, ÍÑIGUEZ-GONZÁLEZ G, CANCINO-PADILLA N, LOOR JJ and GARNSWORTHY PC, 2016. Effect of dietary vegetable oils on the fatty acid profile of plasma lipoproteins in dairy cows. Archives of animal nutrition. 70(4), 322-32
• VARGAS-BELLO-PÉREZ, E, CANCINO-PADILLA, N, ROMERO, J and GARNSWORTHY, PC, 2016. Quantitative analysis of ruminal bacterial populations involved in lipid metabolism in dairy cows fed different vegetable oils. Animal : an international journal of animal bioscience. 1-8 (In Press.)
• GARDINER, TD, COLEMAN, MD, INNOCENTI, F, TOMPKINS, J, CONNOR, A, GARNSWORTHY, PC, MOORBY, JM, REYNOLDS, CK, WATERHOUSE, A and WILLS, D, 2015. Determination of the absolute accuracy of UK chamber facilities used in measuring methane emissions from livestock Measurement. 66, 272-279
• VARGAS-BELLO-PÉREZ, E, INIGUEZ-GONZALEZ, G, FEHRMANN-CARTES, K, TORO-MUJICA, P and GARNSWORTHY, PC, 2015. Influence of fish oil alone or in combination with hydrogenated palm oil on sensory characteristics and fatty acid composition of bovine cheese ANIMAL FEED SCIENCE AND TECHNOLOGY. 205, 60-68
• BELL MJ, SAUNDERS N, WILCOX RH, HOMER EM, GOODMAN JR, CRAIGON J and GARNSWORTHY PC, 2014. Methane emissions among individual dairy cows during milking quantified by eructation peaks or ratio with carbon dioxide. Journal of dairy science. 97(10), 6536-46
• BELL MJ, POTTERTON SL, CRAIGON J, SAUNDERS N, WILCOX RH, HUNTER M, GOODMAN JR and GARNSWORTHY PC, 2014. Variation in enteric methane emissions among cows on commercial dairy farms. Animal : an international journal of animal bioscience. 8(9), 1540-6
• VARGAS-BELLO-PÉREZ E, FEHRMANN-CARTES K, ÍÑIGUEZ-GONZÁLEZ G, TORO-MUJICA P and GARNSWORTHY PC, 2014. Short communication: Chemical composition, fatty acid composition, and sensory characteristics of Chanco cheese from dairy cows supplemented with soybean and hydrogenated vegetable oils. Journal of dairy science. 98(1), 111-7
• O'BRIEN D, CAPPER JL, GARNSWORTHY PC, GRAINGER C and SHALLOO L, 2014. A case study of the carbon footprint of milk from high-performing confinement and grass-based dairy farms. Journal of dairy science. 97(3), 1835-51
• WILKINSON, JM, ALLEN, JD, TUNNICLIFFE, R, SMITH, M and GARNSWORTHY, PC, 2014. Variation in composition of pre-grazed pasture herbage in the United Kingdom, 2006–2012 Animal Feed Science and Technology. 196, 139-144
• SINCLAIR KD, GARNSWORTHY PC, MANN GE and SINCLAIR LA, 2013. Reducing dietary protein in dairy cow diets: implications for nitrogen utilization, milk production, welfare and fertility. Animal : an international journal of animal bioscience. 8(2), 262-74
• HOMER EM, DERECKA K, WEBB R and GARNSWORTHY PC, 2013. Mutations in genes involved in oestrous cycle associated expression of oestrus. Animal reproduction science. 142(3-4), 106-12
• HOMER EM, GAO Y, MENG X, DODSON A, WEBB R and GARNSWORTHY PC, 2013. Technical note: a novel approach to the detection of estrus in dairy cows using ultra-wideband technology. Journal of dairy science. 96(10), 6529-34
• GARNSWORTHY PC, 2012. Sustainable intensive farming systems. In: CASASUS I, ROGOSOC J, ROSATI A, STOKOVIC I and GABINA D, eds., Animal farming and environmental interactions in the Mediterranean region Wageningen Academic Publishers. 139-143
• PRING SR, OWEN M, KING JR, SINCLAIR KD, WEBB R, FLINT APF and GARNSWORTHY PC, 2012. A mathematical model of the bovine oestrous cycle: simulating outcomes of dietary and pharmacological interventions. Journal of theoretical biology. 313, 115-26
• PRING SR, OWEN M, KING JR, SINCLAIR KD, WEBB R, FLINT APF and GARNSWORTHY PC, 2012. A mathematical model of the bovine oestrous cycle: Simulating outcomes of dietary and pharmacological interventions Journal of Theoretical Biology. 313, 115–126
• GARNSWORTHY PC, CRAIGON J, HERNANDEZ-MEDRANO JH and SAUNDERS N, 2012. Variation among individual dairy cows in methane measurements made on farm during milking. Journal of dairy science. 95(6), 3181-9
• GARNSWORTHY PC, CRAIGON J, HERNANDEZ-MEDRANO JH and SAUNDERS N, 2012. On-farm methane measurements during milking correlate with total methane production by individual dairy cows. Journal of dairy science. 95(6), 3166-80
• GARNSWORTHY, PC, FENG, S, LOCK, AL and ROYAL, MD, 2010. Short Communication: Heritability Of Milk Fatty Acid Composition And Stearoyl-Coa Desaturase Indices In Dairy Cows Journal Of Dairy Science. 93(4), 1743-1748
• SINCLAIR, KD and GARNSWORTHY, PC, 2010. Fatty Acids And Fertility In Dairy Cows
• MAAS, J.A., GARNSWORTHY, P.C. and FLINT, A.P.F., 2009. Modelling responses to nutritional, endocrine and genetic strategies to increase fertility in the UK dairy herd. The Veterinary Journal. 180, 356-362
• FOULADI-NASHTA, AA, WONNACOTT, KE, GUTIERREZ, CG, GONG, JG, SINCLAIR, KD, GARNSWORTHY, PC and WEBB, R, 2009. Oocyte Quality In Lactating Dairy Cows Fed On High Levels Of N-3 And N-6 Fatty Acids Reproduction. 138(5), 771-781
• AGUILAR-PEREZ, C, KU-VERA, J, CENTURION-CASTRO, F and GARNSWORTHY, PC, 2009. Energy Balance, Milk Production And Reproduction In Grazing Crossbred Cows In The Tropics With And Without Cereal Supplementation Livestock Science. 122(2-3), 227-233
• NAM, IS, GARNSWORTHY, PC and AHN, JH, 2009. Effects Of Freeze-Dried Citrus Peel On Feed Preservation, Aflatoxin Contamination And In Vitro Ruminal Fermentation Asian-Australasian Journal Of Animal Sciences. 22(5), 674-680
• MAAS, JA, GARNSWORTHY, PC and FLINT, APF, 2009. Modelling Responses To Nutritional, Endocrine And Genetic Strategies To Increase Fertility In The Uk Dairy Herd Veterinary Journal. 180(3), 356-362
• AGUILAR-PEREZ, C, KU-VERA, J and GARNSWORTHY, PC, 2009. Effects Of Bypass Fat On Energy Balance, Milk Production And Reproduction In Grazing Crossbred Cows In The Tropics Livestock Science. 121(1), 64-71
• ROOKE, JA, AINSLIE, A, WATT, RG, ALINK, FM, MCEVOY, TG, SINCLAIR, KD, GARNSWORTHY, PC and WEBB, R, 2009. Dietary Carbohydrates And Amino Acids Influence Oocyte Quality In Dairy Heifers Reproduction Fertility And Development. 21(3), 419-427
• SMITH, JMD, MAAS, JA, GARNSWORTHY, PC, OWEN, MR, COOMBES, S, PILLAY, TS, BARRETT, DA and SYMONDS, ME, 2009. Mathematical Modeling Of Glucose Homeostasis And Its Relationship With Energy Balance And Body Fat Obesity. 17, 632-639
• FOULADI-NASHTA AA, WONNACOTT KE, GUTIERREZ CG, GONG JG, SINCLAIR KD, GARNSWORTHY PC and WEBB R, 2009. Oocyte Quality In Lactating Dairy Cows Fed On High Levels Of N-3 And N-6 Fatty Acids. Reproduction (Cambridge, England). 138(5), 771-81
• ROOKE JA, AINSLIE A, WATT RG, ALINK FM, MCEVOY TG, SINCLAIR KD, GARNSWORTHY PC and WEBB R, 2009. Dietary Carbohydrates And Amino Acids Influence Oocyte Quality In Dairy Heifers. Reproduction, Fertility, And Development. 21(3), 419-27
• WONNACOTT KE, KWONG WY, HUGHES J, SALTER AM, LEA RG, GARNSWORTHY PC and SINCLAIR KD, 2009. Dietary omega-3 and -6 polyunsaturated fatty acids affect the composition and development of sheep granulosa cells, oocytes and embryos. Reproduction (Cambridge, England). 139(1), 57-69
• GARNSWORTHY PC, FOULADI-NASHTA AA, MANN GE, SINCLAIR KD and WEBB R, 2009. Effect of dietary-induced changes in plasma insulin concentrations during the early post partum period on pregnancy rate in dairy cows. Reproduction (Cambridge, England). 137(4), 759-68
• ROOKE, J.A, AINSLIE, A, WATT, R.G, ALINK, F.M, MCEVOY, T.G, SINCLAIR, K.D and GARNSWORTHY, P.C. AND WEBB, R., 2008. Feeding frequency has diet-dependant effects on plasma hormone concentrations but does not affect oocyte quality in dairy heifers fed fibre- or starch-based diets. Animal 2. (In Press.)
• GARNSWORTHY, P.C., 2008. How does Nutrition Interact with Fertility in Dairy Cows? CATTLE PRACTICE. VOL 16(PART 1), 20-23
• GAMA, M. A., GARNSWORTHY, P. C., GRIINARI, J. M., LEME, P. R., RODRIGUES, P. H., SOUZA, L. W. and LANNA, D. P., 2008. Diet-induced milk fat depression: Association with changes in milk fatty acid composition and fluidity of milk fat LIVESTOCK SCIENCE. VOL 115(NUMBER 2-3), 319-331
• WEBB, R, SINCLAIR, KD, FOULADI-NASHTA, AA, MANN, GE and GARNSWORTHY, PC, 2008. Opportunities to influence postpartum ovarian activity by nutrition in the modern high yielding dairy cow In: 16th International Congress on Animal Reproduction. 13-13
• FOULADI-NASHTA, A, GUTIERREZ, CG, SINCLAIR, KD, GARNSWORTHY, PC and WEBB, R, 2008. Sources of dietary fatty acids affect the developmental potential of oocytes and quality of embryos in lactating dairy cows In: 16th International Congress on Animal Reproduction. 188-188
• GARNSWORTHY, PC, GONG, JG, ARMSTRONG, DG, NEWBOLD, JR, MARSDEN, M, RICHARDS, SE, MANN, GE, SINCLAIR, KD and WEBB, R, 2008. Nutrition, Metabolism, And Fertility In Dairy Cows: 3. Amino Acids And Ovarian Function Journal Of Dairy Science. 91(11), 4190-4197
• ROOKE, JA, AINSLIE, A, WATT, RG, ALINK, FM, MCEVOY, TG, SINCLAIR, KD, GARNSWORTHY, PC and WEBB, R, 2008. Feeding Frequency Has Diet-Dependent Effects On Plasma Hormone Concentrations But Does Not Affect Oocyte Quality In Dairy Heifers Fed Fibre- Or Starch-Based Diets Animal. 2(9), 1361-1370
• GAMA, MAS, GARNSWORTHY, PC, GRIINARI, JM, LEME, PR, RODRIGUES, PHM, SOUZA, LWO and LANNA, DPD, 2008. Diet-Induced Milk Fat Depression: Association With Changes In Milk Fatty Acid Composition And Fluidity Of Milk Fat Livestock Science. 115(2-3), 319-331
• GARNSWORTHY, PC, FOULADI-NASHTA, AA, MANN, GE, SINCLAIR, KD, ARMSTRONG, DG, GONG, JG, GUTIERREZ, CG and WEBB, R, 2008. How Does Nutrition Interact With Fertility In Dairy Cows? Cattle Practice. 16, 20-23
• GARNSWORTHY PC, GONG JG, ARMSTRONG DG, NEWBOLD JR, MARSDEN M, RICHARDS SE, MANN GE, SINCLAIR KD and WEBB R, 2008. Nutrition, Metabolism, And Fertility In Dairy Cows: 3. Amino Acids And Ovarian Function. Journal Of Dairy Science. 91(11), 4190-7
• GARNSWORTHY, PC, SINCLAIR, KD and WEBB, R, 2008. Nutrition And Fertility In Cattle CATTLE PRACTICE. 16, 194-199
• GARNSWORTHY PC, LOCK A, MANN GE, SINCLAIR KD and WEBB R, 2008. Nutrition, metabolism, and fertility in dairy cows: 2. Dietary fatty acids and ovarian function. Journal of dairy science. 91(10), 3824-33
• GARNSWORTHY PC, LOCK A, MANN GE, SINCLAIR KD and WEBB R, 2008. Nutrition, metabolism, and fertility in dairy cows: 1. Dietary energy source and ovarian function. Journal of dairy science. 91(10), 3814-23
• ROOKE JA, AINSLIE A, WATT RG, ALINK FM, MCEVOY TG, SINCLAIR KD, GARNSWORTHY PC and WEBB R, 2008. Feeding frequency has diet-dependent effects on plasma hormone concentrations but does not affect oocyte quality in dairy heifers fed fibre- or starch-based diets. Animal : an international journal of animal bioscience. 2(9), 1361-70
• GARNSWORTHY PC, SINCLAIR KD and WEBB R, 2008. Integration of physiological mechanisms that influence fertility in dairy cows. Animal : an international journal of animal bioscience. 2(8), 1144-52
• FENG, S., SALTER, A.M., PARR, T. and GARNSWORTHY, P.C., 2007. Extraction and quantitative analysis of stearoyl-coenzyme A desaturase mRNA from dairy cow milk somatic cells Journal of Dairy Science. 90(9), 4128-4136
• GARNSWORTHY, P.C. AND WISEMAN, J, ed., 2007. Recent Advances in Animal Nutrition 2007: Proceedings of the 41st Feed Conference Nottingham University Press. (In Press.)
• DOUCET, F.J, WHITE, G.A and WISEMAN J. AND HILL, S.E, 2007. Physicochemical changes to starch structure during processing of raw materials and their implications for starch digestibility in newly-weaned piglets. In: GARNSWORTHY P.C. WISEMAN J., ed., Recent Advances in Animal Nutrition Nottingham University Press. 313-330
• FOULADI-NASHTA, A.A., GUTIERREZ, C.G., GONG, J.G., GARNSWORTHY, P.C. and WEBB, R., 2007. Impact of dietary fatty acids on oocyte quality and development in lactating dairy cows Biology of Reproduction. 77(1), 9-17
• NAM, I.S. and GARNSWORTHY, P.C., 2007. Biohydrogenation of linoleic acid by rumen fungi compared with rumen bacteria Journal of Applied Microbiology. Online Early Articles, (1-6)
• WEBB,R, GARNSWORTHY,PC, CAMPBELL,BK and HUNTER,MG, 2007. Intra-ovarian regulation of follicular development and oocyte competence in farm animals. Theriogenology. 68S, S22-S29
• NAM, I.S. and GARNSWORTHY, P.C., 2007. Biohydrogenation Pathways for Linoleic and Linolenic Acids by Orpinomyces Rumen Fungus ASIAN AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES. VOL 20(NUMB 11), 1694-1698
• SALTER, A. M., LOCK, A. L., GARNSWORTHY, P. C. and BAUMAN, D. E., 2006. MILK FATTY ACIDS: IMPLICATIONS FOR HUMAN HEALTH RECENT ADVANCES IN ANIMAL NUTRITION - 2006. CONF 40, 1-18
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• DOUCET, F.J, WHITE, G and WISEMAN, J. AND HILL, S., 2006. Physico-chemical changes to starch structure during processing of raw materials and their implications for starch digestibility in newly-weaned piglets.. In: GARNSWORTHY, P.C. AND WISEMAN, J, ed., Recent Advances in Animal Nutrition 2006 Nottingham University Press. 313-330 (In Press.)
• WISEMAN, J. AND GARNSWORTHY, P.C., ed., 2006. Recent Advances in Non-ruminant Nutrition Nottingham University Press.
• GARNSWORTHY, P.C., MASSON, L.L., LOCK, A.L. and MOTTRAM, T.T., 2006. Variation of milk citrate with stage of lactation and de novo fatty acid synthesis in dairy cows Journal of Dairy Science. 89(5), 1604-1612
• NAM, I.S., GARNSWORTHY, P.C. and AHN, J.H., 2006. Supplementation of Essential Oil Extracted from Citrus Peel to Animal Feeds Decreases Microbial Activity and Aflatoxin Contamination without Disrupting In vitro Ruminal Fermentation Asian Australasian Journal of Animal Sciences. VOL 19(NUMB 11), 1617-1622
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• LOCK, A.L., BAUMAN, D.E. and GARNSWORTHY, P.C., 2005. Effect of production variables on the cis-9, trans-11 conjugated linoleic acid content of cows' milk. Journal of Dairy Science. 88(8), 2714-7
• ROYAL, M.D. and GARNSWORTHY, P.C., 2005. Estimation of genetic variation in Delta9-desaturase enzyme activity in dairy cows Proceedings - British Society of Animal Science. YEAR, 52
• GARNSWORTHY, P.C., 2005. The environmental cost of infertility in dairy herds Cattle Practice. 12, 47
• WISEMAN, J. and GARNSWORTHY, P.C., 2004. Influence of dietary fats and oils on animal product quality Inform. VOL 15(PART 5), 334-335
• GARNSWORTHY, P.C. AND WISEMAN, J, ed., 2004. Recent Advances in Animal Nutrition 2004: Proceedings of the 38th Feed Conference Nottingham University Press. (In Press.)
• GARNSWORTHY, P.C., 2004. The environmental impact of fertility in dairy cows: a modelling approach to predict methane and ammonia emissions Animal Feed Science and Technology. 112(1-4), 211-223
• FENG, S., LOCK, A.L. and GARNSWORTHY, P.C., 2004. A Rapid Lipid Separation Method for Determining Fatty Acid Composition of Milk Journal of Dairy Science. VOL 87(NUMB 11), 3785-3788
• WEBB, R., GARNSWORTHY, P.C., GONG, J-G. and ARMSTRONG, D.G., 2004. Control of follicular growth: local interactions and nutritional influences. Journal of Animal Science. 82 E-Suppl, E63-74
• HADLEY, P.J, FORBES, A.B and RICE, B.R. AND GARNSWORTHY P.C., 2004. The control of cattle lice and effects on leather quality The Veterinary Record. 153, 255-259
• PRYCE, J.E., ROYAL, M.D., GARNSWORTHY, P.C. and MAO, I.L., 2004. Fertility in the high-producing dairy cow Livestock Production Science. VOL 86(NUMBER 1-3), 125-135
• GARNSWORTHY, P.C. and WISEMAN, J., 2003. Recent Advances in Animal Nutrition 2003: Proceedings of the 37th Feed Conference Nottingham University Press.
• WISEMAN, J. AND GARNSWORTHY, P.C, 2003. Influence of dietary fats and oils on animal product quality In: Plenary Paper: International Society for Fat Research. (In Press.)
• GARNSWORTHY, P.C. AND WISEMAN, J., ed., 2003. Recent Advances in Animal Nutrition 2003 Nottingham University Press.
• LOCK, A.L. and GARNSWORTHY, P.C., 2003. Seasonal variation in milk conjugated linoleic acid and delta9-desaturase activity in dairy cows Livestock Production Science. VOL 79(NUMBER 1), 47-59
• MANN, G.E., GREEN, M.P., SINCLAIR, K.D., DEMMERS, K.J., FRAY, M.D., GUTIERREZ, C.G., GARNSWORTHY, P.C. and WEBB, R., 2003. Effects of circulating progesterone and insulin on early embryo development in beef heifers Animal Reproduction Science. VOL 79(NUMBER 1-2), 71-79
• SINCLAIR, K.D., GARNSWORTHY, P.C. and WEBB, R., 2003. Recent advances in reproductive technologies : implications for livestock production and animal nutrition. In: GARNSWORTHY, P.C. and WISEMAN, J., eds., Recent Advances in Animal Nutrition - 2003 Nottingham University Press. 89-113
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• MANN GE, GREEN MP, SINCLAIR KD, DEMMERS KJ, FRAY MD, GUTIERREZ CG, GARNSWORTHY PC and WEBB R, 2003. Effects of circulating progesterone and insulin on early embryo development in beef heifers. Animal reproduction science. 79(1-2), 71-9
• SALTER, A.M., DANIELS, Z.C., WYNN, R.J., LOCK, A.L., GARNSWORTHY, P.C., BUTTERY, P.J., GARNSWORTHY, P.C. and WISEMAN, J., 2002. Manipulating the fatty acid composition of animal products. What has and what might be achieved. In: Recent Advances in Animal Nutrition 2002 33
• GARNSWORTHY, P.C. and WISEMAN, J., 2002. Recent Advances in Animal Nutrition 2002: Proceedings of the 36th Feed Conference Nottingham University Press.
• GONG, J.G., LEE, W.J., GARNSWORTHY, P.C. and WEBB, R., 2002. Effect of dietary-induced increases in circulating insulin concentrations during the early postpartum period on reproductive function in dairy cows Reproduction. 123(3), 419-427
• LOCK, A.L. and GARNSWORTHY, P.C., 2002. Independent effects of dietary linoleic and linolenic fatty acids on the conjugated linoleic acid content of cows' milk Animal Science. 74(1), 163-176
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• GONG, J.G., ARMSTRONG, D.G., BAXTER, G., HOGG, C.O., GARNSWORTHY, P.C. and WEBB, R., 2002. The effect of increased dietary intake on superovulatory response to FSH in heifers Theriogenology. VOL 57(NUMBER 6), 1591-1602
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• SCHOLEY, D. V., MANN, G. E. and GARNSWORTHY, P. C., 2002. Measurement of milk progesterone using near infrared spectroscopy PROCEEDINGS- BRITISH SOCIETY OF ANIMAL SCIENCE. 2002, 128
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• WISEMAN, J., 2001. High energy diets for poultry - effects of diet composition on performance and carcass quality. In: P C GARNSWORTHY AND J WISEMAN, ed., Recent Advances in Animal Nutrition - 2001 Nottingham University Press. 87-106
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• GONG, J. G., MOGHADDAM, A., BAXTER, G., GARNSWORTHY, P. C., WEBB, R. and ARMSTRONG, D. G., 2001. The effect of feeding a diet to increase circulating insulin concentrations on LH secretion during the early postpartum period in dairy cows REPRODUCTION -CAMBRIDGE- ABSTRACT SERIES. NO 27, 15
• MASSON, L. L., MOTTRAM, T. T. and GARNSWORTHY, P. C., 2001. Within milking variation of urea, acetone, fat and protein and the determination of sampling time for an on-line system BSAS OCCASIONAL PUBLICATION. NUMB 28, 157-158
• GARNSWORTHY, P. C. and WISEMAN, J., 2000. Rumen digestibility of starch and nitrogen in near-isogenic lines of wheat Animal Feed Science and Technology. VOL 85(NUMBER 1-2), 33-40
• GARNSWORTHY, P. C., WISEMAN, J. and FEGEROS, K., 2000. Prediction of chemical, nutritive and agronomic characteristics of wheat by near infrared spectroscopy Journal of Agricultural Science. VOL 135(PART 4), 409-418
• GARNSWORTHY, P.C. AND WISEMAN, J, ed., 2000. Recent Advances in Animal Nutrition 2000: Proceedings of the 34th Feed Conference Nottingham University Press. (In Press.)
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• GARNSWORTHY, P. C., 2000. Nutritional Influences on Fertility in Dairy Cows CATTLE PRACTICE. VOL 8(PART 4), 401-406
• GARNSWORTHY, P.C. and WISEMAN, J., 1999. Rumen digestibility in dairy cows of starch in near-isogenic lines of wheat. In: British Society of Animal Science 90
• GARNSWORTHY P.C. AND WISEMAN, J., ed., 1999. Recent Developments in Poultry Nutrition 2 Nottingham University Press, Nottingham.
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• GARNSWORTHY P.C. AND WISEMAN, J., ed., 1999. Recent Developments in Poultry Nutrition 2 Nottingham University Press. (In Press.)
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• GONG, J. G., ARMSTRONG, D. G., BAXER, G. and GARNSWORTHY, P. C., 1999. The effect of increased dietary intake on superovulatory response to FSH in heifers JOURNAL OF REPRODUCTION AND FERTILITY -ABSTRACT SERIES-. ISSUE 23, 47
• UNAL, Y. and GARNSWORTHY, P. C., 1999. Estimation of intake and digestibility of forage-based diets in group-fed dairy cows using alkanes as markers Journal of Agricultural Science. VOL 133(PART 4), 419-426
• GARNSWORTHY, P. C. and WEBB, R., 1999. The Influence of Nutrition on Fertility in Dairy Cows RECENT ADVANCES IN ANIMAL NUTRITION. 1999;, 39-58
• ALLISON, R. D. and GARNSWORTHY, P. C., 1999. Milk production from dairy cows fed an alternative to fish meal PROCEEDINGS- BRITISH SOCIETY OF ANIMAL SCIENCE. 204
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• LOCK, A. L. and GARNSWORTHY, P. C., 1999. The occurrence of conjugated linoleic acid in the milk of dairy cows PROCEEDINGS- BRITISH SOCIETY OF ANIMAL SCIENCE. 209
• UNAL, Y. and GARNSWORTHY, P. C., 1999. An alternative method of administering alkane markers for estimating intake in dairy cows PROCEEDINGS- BRITISH SOCIETY OF ANIMAL SCIENCE. 91
• GARNSWORTHY P.C. AND WISEMAN, J., ed., 1998. Recent Advances in Animal Nutrition 1998 Published by Nottingham University Press.
• WEBB, R., GARNSWORTHY, P.C., GONG, J., ROBINSON, R.S. and WATHES, D.C., 1998. Consequences for reproductive function of metabolic adaptation to load. In: Metabolic Stress in Dairy Cows British Society of Animal Science, Penicuik, UK. 10
• HENDERSON, A.R., GARNSWORTHY, P.C., NEWBOLD, J.R. and BUTTERY, P.J., 1998. The effect of asynchronous diets on the function of the rumen in the lactating dairy cow. In: Proceedings of the British Society of Animal Science 1998 19
• GARNSWORTHY, P.C., 1998. Incorporating writing and presentation skills into the animal science curriculum. In: How to Prepare and Write Scientific Papers, Proceedings of EAAP Satellite Symposium II 27-35
• WISEMAN, J. and GARNSWORTHY, P.C., 1997. The role of lipids in animal feeds. In: Lipid Technologies and Applications Marcel Dekker, Inc, New York, USA. 557-577
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• WEBB, R., GARNSWORTHY, P.C., GONG, J.G., GUTIERREZ, C.G., LOGUE, D., CRAWSHAW, W.M. and ROBINSON, J.J., 1997. Nutritional influence on subfertility in cattle. In: Proceedings of Cattle Fertility Conference University of Nottingham, Nottingham. 13-19
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• UNAL, Y., GARNSWORTHY, P. C. and GORTON, P., 1997. The use of n-alkanes for prediction of intake in dairy cows PROCEEDINGS- BRITISH SOCIETY OF ANIMAL SCIENCE. 137
• GARNSWORTHY, P.C and WISEMAN, J. AND HARESIGN, W., eds., 1996. Recent Advances in Animal Nutrition - 1996 Nottingham University Press.
• GARNSWORTHY, P. C., 1996. The effects on milk yield and composition of incorporating lactose into the diet of dairy cows given protected fat Animal Science. VOL 62(NUMBER 1), 1-4
• GARNSWORTHY, P.C., 1996. Response by dairy cows to supplements containing protected fat and protein with and without lactose. In: Proceedings of 47th Annual Meeting of the European Association for Animal Production, Lillehammer 166
• SINCLAIR, L.A., GARNSWORTHY, P.C., NEWBOLD, J.R. and BUTTERY, P.J., 1995. Effects of synchronizing the rate of dietary energy and nitrogen release in diets with a similar carbohydrate composition on rumen fermentation and microbial protein synthesis in sheep Journal of Agricultural Science. 124(3), 463
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• MOSS, A. R., GIVENS, D. I. and GARNSWORTHY, P. C., 1994. The effect of alkali treatment of cereal straws on digestibility and methane production by sheep ANIMAL FEED SCIENCE AND TECHNOLOGY. VOL 49(NUMBER 3/4), 245
• SINCLAIR, L.A., GARNSWORTHY, P.C., NEWBOLD, J.R. and BUTTERY, P.J., 1993. Effects of synchronising dietary nitrogen and energy supply in diets with a similar carbohydrate composition on rumen fermentation and microbial protein synthesis in sheep Animal Production. 56, 446
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• GARNSWORTHY, P. C. and STOKES, D. T., 1993. The nutritive value of wheat and oat silages ensiled on three cutting dates JOURNAL OF AGRICULTURAL SCIENCE -CAMBRIDGE-. VOL 121(NUMBER 2), 233
• GARNSWORTHY, P. C., 1993. The effects of feeding a polymer gel to dairy cows in early lactation WINTER MEETING- BRITISH SOCIETY OF ANIMAL PRODUCTION. 95
• GARNSWORTHY, P. C., LIGHTOWLER, T. K., WOOLLEY, H. L. and CHARLES, D. R., 1993. Some Effects of Temperature and Humidity on Dairy Cows in Britain ASAE PUBLICATION. NO 03/93, 1139-1145
• ROYLE, C., GARNSWORTHY, P. C., MCARTHUR, A. J. and MEPHAM, T. B., 1992. Effects of frequent milking on heart rate and other physiological variables in dairy cows PUBLICATION- EUROPEAN ASSOCIATION FOR ANIMAL PRODUCTION. VOL 65, 237
• SINCLAIR, L.A., GARNSWORTHY, P.C., NEWBOLD, J.R. and BUTTERY, P.J., 1991. Formulation of diets for ruminants based upon synchrony of supply of nitrogen, organic matter and carbohydrates in the rumen during the day. Proceedings of 42nd Conference, European Association of Animal Production, Berlin; Rome, EAAP; 366-367 In: Proceedings of the Nutrition Society.
• SINCLAIR, L.A., GARNSWORTHY, P.C., BEARDSWORTH, P., FREEMAN, P. and BUTTERY, P.J., 1991. The use of cytosine as a marker to estimate microbial protein synthesis in the rumen Animal Production. 52, 592
• LEES, J A, OLDHAM, J D, HARESIGN, W and GARNSWORTHY, P C, 1990. The effect of patterns of rumen fermentation on the response by dairy cows to dietary protein concentration. The British journal of nutrition. 63(2), 177-86
• NEWBOLD, J.R., GARNSWORTHY, P.C., COLE, D.J., HARESIGN, W. and BUTTERY, P.J., 1988. Responses of British friesian steers with or without implants of oestradiol-17B to undegradable dietary protein Animal Production. 46, 181-193
• JONES, G.P. and GARNSWORTHY, P.C., 1988. The effects of body condition at calving and dietary protein content on dry matter intake and performance in lactating dairy cows given diets of low energy content Animal Production. 47, 321-333
• JONES, GP and GARNSWORTHY, PC, 1988. THE EFFECTS OF BODY CONDITION AT CALVING AND DIETARY-PROTEIN CONTENT ON DRY-MATTER INTAKE AND PERFORMANCE IN LACTATING DAIRY-COWS GIVEN DIETS OF LOW-ENERGY CONTENT ANIMAL PRODUCTION. 47(3), 321-333
• GARNSWORTHY, PC and JONES, GP, 1987. THE INFLUENCE OF BODY CONDITION AT CALVING AND DIETARY-PROTEIN SUPPLY ON VOLUNTARY FOOD-INTAKE AND PERFORMANCE IN DAIRY-COWS ANIMAL PRODUCTION. 44(3), 347-353
• GARNSWORTHY, PC, COLE, DJA, GRANTLEYSMITH, M, JONES, DW and PETERS, AR, 1986. THE EFFECT OF FEEDING PERIOD AND TRENBOLONE ACETATE ON THE POTENTIAL OF CULLED DAIRY-COWS FOR BEEF-PRODUCTION ANIMAL PRODUCTION. 43(3), 385-390
• GARNSWORTHY, PC and TOPPS, JH, 1982. THE EFFECT OF BODY CONDITION OF DAIRY-COWS AT CALVING ON THEIR FOOD-INTAKE AND PERFORMANCE WHEN GIVEN COMPLETE DIETS ANIMAL PRODUCTION. 35(AUG), 113-119
• GARNSWORTHY, PC and TOPPS, JH, 1982. THE EFFECTS OF BODY CONDITION AT CALVING, FOOD-INTAKE AND PERFORMANCE IN EARLY LACTATION ON BLOOD COMPOSITION OF DAIRY-COWS GIVEN COMPLETE DIETS ANIMAL PRODUCTION. 35(AUG), 121-125