Yuzhi Li

Hernandez, A. D., Y. Z. Li, R. Carr, and S. Major. 2023. Intestinal roundworm infection in organic and alternative swine farms in the USA. Veterinary Parasitology 314 (109856) https://doi.org/10.1016/j.vetpar.2022.109856. 

Hernandez, A. D., B. Kantner, E. Santos, S. Major, R. Carr, and Y. Z. Li. 2023. The number of Oesophagostomum spp. larvae recovered in coprocultures varies with media used (Short Communication). J. Helminthology 97 (e55) https://doi.org/10.1017/S0022149X23000391

Li, Y. Z., A. D. Hernandez, S. Major, and R. Carr. 2022. Occurrence of intestinal parasites and its impact on growth performance and carcass traits of pigs raised under near-organic conditions. Frontiers in Vet. Sci. 9: 911561. Doi:10.3389/fvets.2022.911561

Lou, M., S. T. Porter, J. Massey, B. Ventura1, J. Deen, and Y. Z. Li. 2022. The application of 3D landmark-based morphometrics towards refinement of the piglet grimace scale. animals, 2022 (12): 1944 (1-18). doi.org/10.3390/ani12151944

Lozinski, B., B. Frederick, Y. Z. Li, M. Saqui-Salces, G. Shurson, E. Urriola, M. Wilson, and L. Johnston. 2022. Effects of water quality on growth performance and health of nursery pigs. Transl. Anim. Sci. 6(1): txac002. doi:10.1093/tas/txac002

Myeongseong Lee, Jacek A. Koziel, Brett C. Ramirez, Baitong Chen, and Yuzhi Li. 2022. An All-in-One Concept of A Mobile System For On-Farm Swine Depopulation, Pathogen Inactivation, Off-Site Carcass Disposal, and Biosecure Cleanup. AgriEngineering 4 (4): 1184-1199. https://doi.org/10.3390/agriengineering4040074

Li, Y. Z., A. D. Hernandez, S. Major, and R. Carr. 2022. Occurrence of intestinal parasites and its impact on growth performance and carcass traits of pigs raised under near-organic conditions. Frontiers in Vet. Sci. 9: 911561. Doi:10.3389/fvets.2022.911561Lozinski, B., B. Frederick, Y. Z. Li, M. Saqui-Salces, G. Shurson, E. Urriola, M. Wilson, and L. Johnston. 2022. Effects of water quality on growth performance and health of nursery pigs. Submitted to Transl. Anim. Sci. 6(1): txac002. doi:10.1093/tas/txac002.

Li, Y. Z.*, W. F. Lazarus, C. Reese, A. Hilbrands, R. Cox, F. Forcella, R. W. Gesch, and L. Johnston. 2021. Integrating camelina into organic pig production – Impact on growth performance of pigs, costs and returns. Frontiers in Sustainable Food Systems (5): Article 759721. Doi.10.3389/fsufs.2021.75921.

Li, Y. Z.*, S. Q. Cui, S. K. Baidoo, and L. J. Johnston. 2021. Evaluation of sow caliper for body condition measurement of gestating sows. J. Swine Health and Production 29(5): 245-252.

Lou, M., B. Ventura, J. Deen, and Y. Z. Li. 2021. Surgical castration changes struggle behavior and vocalizations in male piglets. J. Appl. Anim. Welf. Sci. doi.org/10.1080/10888705.2021.1916938. Published online 16 Apr. 2021.    

Zhu, Y., J. Johnston, M. Reese, E. Buchanan, J. Tallaksen, A. Hilbrands, and Y. Z. Li. 2021. Effects of cooled floor pads combined with chilled drinking water on behavior and performance of lactating sows under heat stress. J. Anim. Sci. 99(3): skab066. doi: 10.1093/jas/skab066.

Zhu, Y., R. Cox, L. Johnston, C. Reese, F. Forcella, R. W. Gesch, and Y. Z. Li. 2021. Effects of increasing inclusion of camelina press cake in diets fed to growing-finishing pigs on pork quality. Appl. Anim. Sci. 37: 357-366. doi:10.15232/aas.2021-02161.

Hilbrands, A. M., L. Johnston, R. Cox, F. Forcella, R. Gesch, and Y. Z. Li. 2021. Effects of increasing dietary inclusion of camelina cake on growth performance of growing-finishing pigs. Transl. Anim. Sci. 2021(5): 1-10. doi:10.1093/tas/txab140.

Li, Y. Z., L. J. Johnston, and M. S. Dawkins. 2020. Utilization of optical flow algorithms to monitor development of tail biting outbreaks in pigs. animals. 2020, 10, 323/doi:10,3390/ani10020323. 

Zhu, Y., Y. Z. Li, M. Reese, E. Buchanan, J. Tallaksen, and L. J. Johnston. 2020. Behavior and performance of suckling piglets provided three supplemental heat sources. animals. 2020, 10, 1155/doi:10.3390/ani10071155.

Li, Y. Z., S. Q. Cui, X. J. Yang, L. J. Johnston, and S. K. Baidoo. 2018. Minimal floor space allowance for gestating sows kept in pens with electronic sow feeders on fully slatted floors. J. Anim. Sci. 96: 4195-4208 /doi: 10.1093/jas/sky282.

Li, Y. Z., H. Zhang, L. Johnston, and W. Martin. 2018. Understanding tail-biting in pigs through social network analysis. Anim. 8 (1)13: 1-13 /doi:10.3390.ani8010013. 

He, Y., J. Deen, G. C. Shurson, and Y. Z. Li. 2018. Behavioral indicators of slow growth in nursery pigs. J. Appl. Anim. Welfare Sci. 21 (4): 389-399 /doi:10.1080/10888705.2018.1438286.

Li, Y.Z., K.A. McDonald, and H.W. Gonyou. 2017. Determining feeder space allowance across feed forms and water availability in the feeder for growing-finishing pigs. J. Swine Health Prod. 25: 174-182.

Li, Y.Z., L.H. Wang, and L.J. Johnston. 2017. Effects of social rank on welfare and performance of gestating sows housed in two group sizes. J. Swine Health Prod. 25:290-298.

Li, Y.Z., H.F. Zhang, L.J. Johnston, W. Martin, J.D. Peterson, and J.F. Coetzee. 2017. Effects of tail docking and tail biting on performance and welfare of growing-finishing pigs in a confinement housing system. J. Anim. Sci. 95: 4835-4845. doi:10.2527/jas2017.1571.

He, Y., J. Deen, G.C. Shurson, C. Chen, D.H. Keisler, and Y.Z. Li. 2016. Identifying factors contributing to slow growth in pigs. J. Anim. Sci. 94:2103-2116.

Li, Y., H. Zhang, L.J. Johnston, and W. Martin. 2016. Do pigs form social structures: An application of social network analysis? J. Anim. Sci. 95(Suppl. 1):7. doi:10.2527/asasmw.2017.015.

Wang, L.H. and Y.Z. Li. 2016. Effect of continuous access to feeding stalls during mixing on behavior, welfare and performance of group-housed gestating sows in different social ranks. Can. J. Anim. Sci. 10.1139/CJAS-2015-0054.

Zhang, H.F., J. Wang, L. Wan, and Y.Z. Li. 2016. Consumers’ preferences and willingness to pay for traceable pork in Guangzou (China). Guangdong Agric. Sci. 43: 183-192 (in Chinese).

Li, X., S.K. Baidoo, Y.Z. Li, G.C. Shurson, and L.J. Johnston. 2014. Interactive effects of distillers dried grains with solubles and housing system on reproductive performance and longevity of sows over three reproductive cycles. J. Anim. Sci. 92:1562-1573.

Phillips, C.E., C. Farmer, J.E. Anderson, L.J. Johnston, G.C. Shurson, J. Deen, D.H. Keisler, A.M. Conner, and Y.Z. Li. 2014. Preweaning mortality in group-housed lactating sows: Hormonal differences between high risk and low risk sows. J. Anim. Sci. 92:2603-2611.

Johnston, L.J. and Y.Z. Li. 2013. Performance and well-being of sows housed in pens retrofitted from gestation stalls. J. Anim. Sci. 91:5937-5945.

Li, Y.Z. and H.W. Gonyou. 2013. Comparison of management options for sows kept in pens with electronic feeding stations. Can. J. Anim. Sci. 93:445-452.

Li, Y.Z., C.E. Phillips, L.H. Wang, X.L. Xie, S.K. Baidoo, G.C. Shurson, and L.J. Johnston. 2013. Effects of distillers' dried grains with solubles on behavior of sows kept in a group-housed system with electronic sow feeders or individual stalls. Can. J. Anim. Sci. 93:57-66.

Dong, N., Q. Ma, A. Shan, Y. Lv, W. Hu, Y. Gu, and Y. Li. 2012. Novel design of short antimicrobial peptides derived from the bactericidal domain of avian β-defensin-4. Protein and Peptide Letters. 19(11):1212-1219.

Dong, N., Q. Ma, A. Shan, Y. Lv, W. Hu, Y. Gu, and Y.Z. Li. 2012. Strand-length dependent antimicrobial activity and memrane-active mechanism of arginine- and valine-rich beta-hairpin-like antimicrobial peptides. Antimicrob. Agents Chemother. v.56(6):2994-3003.

Li, Y.Z., J.E. Anderson, and L.J. Johnston. 2012. Animal-related factors associated with piglet mortality in a bedded, group-farrowing system. Can. J. Anim. Sci. 92:11-20.

Li, Y.Z., L.H. Wang, and L.J. Johnston. 2012. Effects of farrowing system on behavior and growth performance of growing-finishing pigs. J. Anim. Sci. 90:1008-1014.

Li, Y.Z., L.H. Wang, and L.J. Johnston. 2012. Sorting by parity to reduce aggression towards young sows in group-gestation housing systems. J. Anim. Sci. 90:4514-4522.

Ma, Q., N. Dong, A. Shan, Y. Lv, Y. Li, Z. Chen, B. Cheng, and Z. Li. 2012. Biochemical property and membrane-peptide interactions of de novo antimicrobial peptides designed by helix-forming units. Amino Acids 43(6):2527-2536.

Phillips, C.E., Y.Z. Li, L.J. Johnston, A.E. Goplen, and G.C. Shurson. 2012. Technical note: A technique for ear vein catheterization in grouphoused sows. J. Anim. Sci. 90:501-504.

Wang, L.H., Y.Z. Li, and L.J. Johnston. 2012. Effects of reduced nocturnal temperature on performance and behavior of nursery pigs. J. Integ. Ag. 11:101-108.

Li, Y.Z., S.K. Baidoo, L.J. Johnston, and J.E. Anderson. 2011. Effects of tryptophan supplementation on aggression among group-housed gestating sows. J. Anim. Sci. 89:1899-1907.

Li, Y.Z. and L.H. Wang. 2011. Effects of previous housing systems on agonist behaviors of growing pigs at mixing. Appl. Anim. Behav. Sci. 132:20-26.

Li, Y.Z., L.J. Johnston, and A.M. Hilbrands. 2010. Pre-weaning mortality of piglets in a bedded, group-farrowing system. A Case Report. J. Swine Health Prod. 18(2):75-80.

Li, Y.Z. and L.J. Johnston. 2009. Behavior and performance of pigs previously housed in large groups. J. Anim. Sci. 87:1472-1478.

Strawford, M.L., Y.Z. Li, and H.W. Gonyou. 2008. The effect of management strategies and parity on the behavior and physiology of gestating sows housed in electronic sow feeding system. Can. J. Anim. Sci. 88:559-567.

Li, Y.Z. and H.W. Gonyou. 2007. Effects of stall width and sow size on behavior of gestating sows. Can. J. Anim. Sci. 87:129-138.

Li, Y.Z., B.J. Kerr, M.T. Kidd, and H.W. Gonyou. 2006. Use of supplementary tryptophan to modify the behavior of pigs. J. Anim. Sci. 84:212-220.

Li, Y.Z., L. Chenard, S.P. Lemay, and H.W. Gonyou. 2005. Water intake and wastage at nipple drinkers by growing-finishing pigs. J. Anim. Sci. 83:1413-1422.

Schmolke, S.A., Y.Z. Li, and H.W. Gonyou. 2004. Effects of group size on social behaviour following regrouping of growing-finishing pigs. Appl. Anim. Behav. Sci. 88:27-38.

Spinka M., H.W. Gonyou, Y.Z. Li, and L.A. Bate. 2004. Nursing synchronization in lactating sows as affected by activity, distance between the sows and playback of nursing vocalizations. Appl. Anim. Behav. Sci. 88:13-26.

Harris, M.J., Y.Z. Li, and H.W. Gonyou. 2003. Savaging behaviour in gilts and sows. Can. J. Anim. Sci. 83:819-821.

Schmolke, S.A., Y.Z. Li, and H.W. Gonyou. 2003. Effect of group size on performance of growing-finishing pigs. J. Anim. Sci. 81:874-878.

Li, Y.Z. and H.W. Gonyou. 2002. Analysis of belly nosing and associated behaviour among pigs weaned at 12-14 days of age. Appl. Anim. Behav. Sci. 77:285-294.

Li, Y.Z., R.J. Christopherson, and C.J. Field. 2000. Effects of beta-adrenergic receptor agonist and low environmental temperature on the immune system of growing lambs. Can. J. Anim. Sci. 80:605-613.

Li, Y.Z., R.J. Christopherson, B.T. Li, and J.A. Moibi. 2000. Effects of a beta-adrenergic agonist (L-644, 969) on performance and carcass traits of growing lambs in a cold environment. Can. J. Anim. Sci. 80:459-465.

Moibi, J.A., R.J. Christopherson, and Y.Z. Li. 2000. Effect of beta-adrenergic agonist L-644, 969 on the impact of the thermal environment on in vitro fatty acid synthesis and lipogenic enzymes in sheep. Comp. Bioch. and Physio. C125:251-263.

Li, Y.Z., M. Li, S. Li, D. Luan, Y.L. Shan, Z.B. Zhang, and Q.H. Wang. 1998. Study on an open circuit respiratory calorimetry system. ACTA Zoonutrimenta Sinica, Vol. 10:29-34.

Li, X., Y.Z. Li, Q.H. Wang, X.F. Meng, and Y.L. Shan. 1997. The effect of high temperature and clenbuterol on performance and carcass composition of broilers. J. North. Agri. Univ. 4:34-44.

Li, Y.Z., T. Ito, and S. Yamamoto. 1992. Effects of environmental temperature on heat production associated with food intake and on abdominal temperature in laying hens. Br. Poult. Sci. 33:113-122.

Li, Y.Z., T. Ito, and S. Yamamoto. 1991. Diurnal variation in heat production related to some physical activities in laying hens. Br. Poult. Sci. 32:821-827.

Li, Y.Z., T. Ito, and S. Yamamoto. 1991. Use of limited daily access to food in measuring the heat production associated with food intake in laying hens. Br. Poult. Sci. 32:829-839.

Li, Y.Z. 1990. A short review on energy expenditure of laying hens. Japanese J. of Livestock Management 25:81-84.

Li, Y.Z., T. Ito, and S. Yamamoto. 1989. Heat production and evaporative heat loss of laying hens under high environmental temperature. Japanese J. Livestock Mgmt. 25:55-58.

Bao, J., and Y.Z. Li. 2016. Chapter 12. China perspective: Emerging interest in animal behaviour and welfare science. In: Animals and Us: 50 Years and More of Applied Ethology. J. Brown, Y. Seddon, and M. Appleby, Eds., Wageningen Acad. Publishers. p. 241-252.

Brown, J., L. Johnston, Y.Z. Li, T. Parsons, T. Safranski, and Y. Seddon. 2016. Free Access Stalls – A Guide for Managing Sows. National Pork Board #004932; Clive, IA. 12/2016.

Johnston, L., J. Brown, Y.Z. Li, T. Parsons, T. Safranski, and Y. Seddon. 2016. Feeding Stalls – A Guide for Managing Sows. National Pork Board #004933; Clive, IA. 12/2016.

Li, Y.Z., J. Brown, L. Johnston, T. Parsons, T. Safranski, and Y. Seddon. 2016. Floor Feeding – A Guide for Managing Sows. National Pork Board #004934; Clive, IA. 12/2016.

Li, Y.Z., H.F. Zhang, L. Johnston, L. Jacobson, and W. Martin. 2016. Tail Biting in Growing-Finishing Pigs. Final Report to National Pork Board.

Parsons, T., J. Brown, L. Johnston, Y.Z. Li, T. Safranski, and Y. Seddon. 2016. Gestation Stalls – A Guide for Managing Sows. National Pork Board #004931; Clive, IA. 12/2016.

Safranski, T., J. Brown, L. Johnston, Y.Z. Li, T. Parsons, and Y. Seddon. 2016. Gestation Stalls – A Guide for Managing Sows. National Pork Board #004936; Clive, IA. 12/2016.

Seddon, Y., J. Brown, L. Johnston, Y.Z. Li, T. Parsons, and T. Safranski. 2016. Trickle Feeding – A Guide for Managing Sows. National Pork Board #004935; Clive, IA. 12/2016.

Li, Y. Z., L. J. Johnston, J. Tallaksen, A. G. y Garcia, M. Wilson, W. Lazarus, R. Cox, C. Reese, and D. DeWitte. 2023. Integrating hybrid rye as a winter annual crop into organic pig production. OREI – USDA Program Director Annual Meeting. Washington D.C. April 19-20, 2023. (Poster Presentation). 

Archer, C., A. Hilbrands, B. Mote, T. Schmidt, L. Johnston, and Y. Z. Li. 2023. Influence of group size on performance and tail damage caused by tail biting in undocked growing-finishing pigs. Poster Presentation at CFANS Research Symposium on March 16, 2023, and at AnSc Dept. Showcase on April 27, 2023.

Kavanagh, M. L. J. Johnston, and Y. Z. Li. 2023. Growing hybrid rye to reduce feed and bedding costs in organic pig production. Poster Presentation at CFANS Research Symposium on March 16, 2023, and at AnSc Dept. Showcase on April 27, 2023. 

Yuzhi Li and Melissa Wilson. 2023. Integrated winter hybrid rye into organic pig production. Invited Seminar at the Forever Green Initiative Research and Discussion Meeting. St Paul, MN. April 7, 2023.

Utilization of computer vision as a means to understanding the etiology of tail biting outbreaks in pigs. USDA AFRI Welfare and Well-Being of Agricultural Animals (Program – A1251) 2022 Annual Project Director’s Meeting (virtual). Mar. 1^st, 2022.

Parasite infection in organic pigs (invited). Annual Conference of Midwest Organic and Sustainable Education Service (MOSES). La Crosse, WI. Feb. 25, 2022.

Feeding camelina press-cake to organic pigs (invited). Annual Conference of Midwest Organic and Sustainable Education Service (MOSES). La Crosse, WI. Feb. 25, 2022.

St. Charles, K M., Y. Z. Li, and L. J. Johnston. 2021. Exploring preferential networks of grower-finisher pigs and potential connections to tail biting. Page 164 in Proceeding of The 8^th International Conference on the Assessment of Animal Welfare at Farm and Group Level. Ed. L. Boyle and K. O’Driscoll. Aug. 16-19, 2021. Cork, Ireland (Virtual).

Reducing piglet mortality in a bedded, group farrowing systems (invited, virtual presentation). The Freedom in Farrowing and Lactation Virtual Workshop, Copenhagen, Denmark. Aug. 13, 2021.

Camelina meal as an alternative ingredient in growing-finishing pig diets. American Society of Animal Science/Canadian ASAS 2021 Joint Meeting. Louisville, KY. July 17, 2021.

Researching tail biting behavior in growing-finishing pigs (invited, virtual presentation). The 2021 Conference of Chinese Livestock Environment and Hygiene Society, Tai-An, Shandong Province, P. R. China. April 18, 2021.  

Parasites in organic pigs: Lessons learned thus far (DeWitt, D and Y. Z. Li++; invited). Annual Conference of Midwest Organic and Sustainable Education Service (MOSES). Growing Stronger: Collaborative Conference on Organic & Sustainable Farming. Virtual Workshop. Feb. 23, 2021.

Reducing feed costs in organic pig production – Research update on camelina project. WCROC Advisory Committee Meeting. Feb. 23, 2021.

Management strategies to reduce swine parasites in pastured pork production (invited). Rodale Institute Webinar. Oct 8, 2020.  

Tail, ear, and flank biting: Reasons why and how to address (invited). PorkBridge Webinar. Aug. 6, 2020.

Li, Y. Z. 2020. Feeding and nutritional strategies to improve welfare of group-housed gestating sows. Animal Behavior, Health, and Well-Being Symposium. ASAS Midwest Section 2020 Meeting. March 3, 2020. Omaha, Nebraska. Oral presentation [invited].

Li, Y. Z. J. Zhu, M. Reese, E. Buchanan, and L. Johnston. 2020. Effects of chilled drinking water and cooled floor pads on behavior of lactating sows under heat stress. American Society of Animal Science Midwest Section/ADSA Midwest Branch 2020 Joint Meeting. March 2-4, 2020. Omaha, Nebraska. Poster presentation.

Li, Y. Z., A. Hernandez, R. Carr, S. Major, and D. DeWitte. 2020. Parasite prevalence and fecal egg counts on organic pig farms. American Society of Animal Science Midwest Section/ADSA Midwest Branch 2020 Joint Meeting. March 2-4, 2020. Omaha, Nebraska. Poster presentation.

Lou, M., Y. Z. Li, B. Ventura, and J. Deen. 2020. Struggle behavior and vocalization of male piglets during castration. American Society of Animal Science Midwest Section/ADSA Midwest Branch 2020 Joint Meeting. March 2-4, 2020. Omaha, Nebraska. Oral presentation.

Johnston, L. J. M. Reese, E. Buchanan, Y. Z. Li, A. M. Hilbrands, B. M. Lozinski, J. Tallaksen, K. A. Janni, B. Hetchler, and E. Cortus. 2020. Effects of a solar-powered cooling system on performance of heat-stressed lactating sows. American Society of Animal Science Midwest Section/ADSA Midwest Branch 2020 Joint Meeting. March 2-4, 2020. Omaha, Nebraska. Oral presentation.

Furo, G., C. J. Cardona, Y. Li, S. L. Noll. 2020. Comparison of footpad dermatitis scores in market turkey hens. Poster and oral presentation at 2020 Poultry Science Association Annual Meeting, July 20-22, 2020.

Furo*, G., C. J. Cardona, Y. Li, R.M. Hulet, K. A. Janni, S. L. Noll. 2020. Bedding and stocking density influenced the relationship of litter characteristics to footpad fermatitis in market turkey hens. Poster and oral presentation at 2020 Poultry Science Association Annual Meeting, July 20-22, 2020.

St. Charles, K. and Li, Y.Z. 2019. Utilization of social network analysis to assess association between positive social ties and the prevalence of tail biting in growing pigs. Pig Welfare Symposium, Minneapolis, MN. November 13.

Li, Y.Z. 2019. Parasite prevalence on organic farm pigs. Extension-in-Service Annual Meeting. National Pork Board, Sacremento, CA. October 23-24.

Li, Y.Z. 2019. Association between social preference and development of tail biting in growing-finishing pigs. 17th International Conference on Production Diseases in Farm Animals, Bern, Switzerland. June 28.

St. Charles, K. and Li, Y.Z. 2019. Social structures, social ties, and development of tail biting in growing-finishing pigs. Midwest ASAS Annual Meeting, Omaha, NE. March 12. 

Lou, M., and Li, Y.Z. 2019. Effects of cooled floor pads and cooled drinking water on behavior of lactating sows under heat stress. Midwest ASAS Annual Meeting, Omaha, NE. March 12.

Li, Y.Z. 2019. Reducing piglet mortality in loose farrowing systems. Midwest Organic Pork Conference, Waterloo, IA. March 8.

Li, Y.Z. 2018. Behavior, Welfare, and Organic Swine Production. China’s Symposium on Livestock and Poultry Environment and Precision Animal Husbandry, Harbin, China. Sept. 3-5.

Li, Y.Z. 2018. Effect of body condition measured using a sow caliper on performance of group-housed gestating sows. ASAS Annual Meeting, Vancouver, BC. Canada. July 9-12.

Li, Y.Z. 2018. Utilization of optical flow to monitor development of tail biting outbreaks in pigs. 12^th World Conference of Animal Production, Vancouver, BC. Canada. July 6-8.

Li, Y.Z. 2018. Evaluating body condition of group-housed gestating sows: Sow caliper measurements vs. backfact thickness and visual scores. Midwest ASAS Meeting, Omaha, NE. Mar. 12-14.

Li, Y.Z. 2018. Evaluation of floor space allowance for group-housed gestating sows: Application of Allometric Principles. Midwest ASAS Meeting, Omaha, NE. Mar. 12-14.

Li, Y.Z. 2018. Organic Swine Production in United States. Minnesota Organic Conference, St Cloud, MN. Jan 11-12.

Li, Y.Z. 2017. Minimal floor space allowance for gestating sows housed in pens with electronic sow feeders. Proc, Pig Welfare Symp., Des Moines, IA. Nov. 7-9.

Li, Y.Z. 2017. Salivary cortisol concentrations of group-housed gestating sows: Individual vs. group samples. Midwestern Anim. Sci. Annual Mtg., Omaha, NE. Mar. 13-15.

Li, Y.Z. 2017. Update on swine program. Presented to WCROC Advisory Committee, Morris, MN. Feb. 22.

Li, Y.Z. 2017. Do pigs form social structures: An application of social network analysis? Midwestern Anim. Sci. Annual Mtg., Omaha, NE. Mar. 13-15.

Li, Y.Z. 2017. Effect of tail docking on welfare and performance of pigs during nursery and growing-finishing periods. Midwestern Anim. Sci. Annual Mtg., Omaha, NE. Mar. 13-15.

Li, Y.Z. 2017. Understanding tail biting through social network analysis. Multi-state Res. Comm. (W3173) Annual Mtg., Puerto Rico. Aug. 3-5.

Li, Y.Z., H. Zhang, L.J. Johnston, and W. Martin. 2017. Understanding tail biting in pigs through social network analysis. Conf. on Assessment of Animal Welfare at Farm and Group Levels, Wageningen, The Netherlands. Sep. 5-8.

Cui, S.Q., A. Holten, J. Anderson, and Y.Z. Li. 2016. Tail biting and tail damage in pigs: A comparison between pigs with and without the tail docked. Proc., 2016 ISAE Congress, Edinburgh, U.K. Jul. 12-16. p. 18. (Oral Presentation)

Johnston, L., and Y.Z. Li. 2016. Practical considerations for housing gestating sows in groups. Proc., 2016 Eastern Nutrition Conf., Guelph, Ontario, Canada. May 11-12.

Li, Y.Z. 2016. Confinement-free farrowing systems in the U.K. Presented at Alternative Task Force Mtg., Montevideo, MN. Oct. 18.

Li, Y.Z. 2016. Food for thought - Operation Main Street. Morris Area High School, Morris, MN. Jan. 21. (Also reported on KKOK Radio and in the KKOK Radio News Release).

Li, Y.Z. 2016. Tail biting in growing-finishing pigs. Proc., 2016 AASV Ann. Mtg., New Orleans, LA. Feb. 27. p. 46. (Invited Presentation)

Li, Y.Z. 2016. Use of antibiotics in animal production and research update at the West Central Research and Outreach Center. Presented to graduate students and faculty at the College of Animal Sci. and Technol., Northeast Agric. Univ., Harbin, China. Sep. 21.

Li, Y.Z., S. Cui, J. Anderson, A. Holten, A. Hilbrands, and L. Johnston. 2016. Docking the tail or not: Effect on tail damage, skin lesions and growth performance of pigs. Session 2.6. Precision Livestock Farming, Animal Production, Health, and Welfare, CIGR-Ag. Eng. Conf., Aarhus, Denmark. Jun. 26-29. (Oral Presentation)

Li, Y.Z. 2015. Automated monitoring of swine behavior using accelerometers: Classification of behavior of nursery pigs from acceleration patterns. Midwestern ASAS Mtg., Des Moines, IA. March 16-18. (Poster)

Li, Y.Z. 2015. A comparison for IgG absorption between Min and Landrace piglets. Joint Ann. Mtg. of ASAS/ADSA/CSAS, Orlando, FL. July 12-16. (Poster)

Li, Y.Z. 2015. Determining feeder space requirement for growing-finishing pigs. Joint Ann. Mtg. of ASAS/ADSA/CSAS, Orlando, FL. July 12-16. (Poster)

Li, Y.Z. 2015. Identifying risk factors of slow growth of pigs from birth to market. Midwestern ASAS Mtg., Des Moines, IA. March 16-18. (Poster)

Li, Y.Z. 2015. Minimal floor space requirement for group-housed gestating sows. W2173 Multi-state Res. Committee Ann. Mtg., Daytona, FL. July 17-18.

Li, Y.Z. 2015. Modern animal agriculture and pork production. Operation Main Street, Alexandria High School, FFA Banquet, Alexandria, MN. May 14.

Li, Y.Z. 2015. Physiological characteristics of slow growing pigs from birth to market. Midwestern ASAS Mtg., Des Moines, IA. March 16-18. (Poster)

Li, Y.Z. 2015. Research update on welfare and management of gestating sows. Proc., China Swine Sci. Conf., Xiamen Internatl. Conf. and Exhibition Ctr., Xiamen City, Fujian Province, China. Sep. 19-21.

Li, Y.Z. 2014. Biosecurity for alternative swine farms - The experience of WCROC. Seminar for Alternative Swine Producers, Redwood Falls, MN. Jan. 13.

Li, Y.Z. 2014. Effects of feeder space and feeder type on welfare and growth performance of growing-finishing pigs. Swine Res. Seminar, Guangdong Acad. of Ag. Sci., Guangzhou, China. Nov. 19.

Li, Y.Z. 2014. Effects of feeder space and feeder type on welfare and performance of growing-finishing pigs. Shenzhen Swine Industry Forum: Facing the Environmental and Efficiency Challenges, Shenzhen, China. Nov. 21.

Li, Y.Z. 2014. Effects of group size and social rank on welfare and performance of gestating sows in a group-housing system with floor feeding. Joint Ann. Mtg. of ASAS/ADSA/CSAS, Kansas City, KS. July 22. (Poster)

Li, Y.Z. 2014. Effects of social rank on agonistic behaviors and associated injuries of gestating sows at mixing. Midwestern ASAS Mtg., Des Moines, IA. March 18. (Poster)

Li, Y.Z. 2014. Protecting low ranking sows in group-housing systems. W2173 Multi-State Res. Committee Ann. Mtg., Univ. of Nebraska. July 25-26.

Li, Y.Z. 2014. Swine housing and welfare. NCERA-219 Ann. Mtg., WCROC, Morris, MN. Oct. 28.

Li, Y.Z. 2014. What determines the social rank of a sow in a group- housing system? Midwestern ASAS Mtg., Des Moines, IA. March 18. (Poster)

Li, Y.Z. 2013. Animal stress and welfare. 11th World Conf. of Animal Production, Beijing, China. Oct. 15-19, 2013.

Shurson, J., L. Johnston, and Y. Li. 2014. Challenges and opportunities for optimal nutrition of the high producing sow. Asiapac, Donguan, PRC. June 29-30.

Li, Y.Z. 2013. Can feeding stalls be used by low ranking sows as hiding spaces? Midwestern Section ASAS Mtg. March 12, 2013. (Poster)

Li, Y.Z. 2013. Management options for group-house sows. Midwestern Section ASAS Mtg. March 12, 2013.

Li, Y.Z. 2013. Minimizing aggression among group-housed sows. 68th Seminar of Appl. Anim. Sci., Graduate School of Biosphere Sci., Univ. of Hiroshima, Higashi-Hiroshima, Japan. June 3.

Li, Y.Z. 2013. Research on group-hosing for sows. Internatl. Symp. on Animal Environment and Welfare, Rongchang, Chongqing, China. Oct. 19-22. pp. 32-38.

Li, Y.Z. 2013. Research on sow housing. Internatl. Symp. of Anim. Environ. and Welfare, Chongqing, China. Oct. 20-21.

Li, X., G.C. Shurson, S.K. Baidoo, Y.Z. Li, and L.J. Johnston. 2013. Effects of gestation housing system on sow performance and longevity over three reproductive cycles. Manipulating Pig Production. Proc., 14th Biennial Conf. of the Australasian Pig Sci. Assoc. (APSA), Melbourne, Australia. Nov.

Li, Y.Z. 2012. Gestation sow housing – Options for group gestation housing. Fall Swine Educ. Seminar, NDSU Ext. Service, North Dakota State Univ., Fargo, ND. Oct. 5.

Li, Y.Z. 2012. Housing and welfare of gestating sows. Food Marketing Inst. Webinar: Sow Gestation Stall. July 18.

Li, Y.Z. 2012. Improving breeding and farrowing performance in alternative swine production. Workshop on Successful Options for Profiting from Livestock Production - Options for Making $45,000 from Hogs, Land Stewardship Project (LSP), St. Charles, MN. March 17.

Li, Y.Z. 2012. Options for group-housing of gestating sow. FASS and AVMA Webinar Series: Gestation Sow Housing. May 11.

Li, Y.Z. 2012. Research review on alternative swine at the WCROC. Ann. Mtg. of Task Force for Alternative Swine Housing, Montevideo, MN. March 8.

Li, Y.Z. 2011. Evaluation of swine housing systems in the United States. Heilongjiang Swine Conf., Wangkui County, Heilongjiang Province, China. July 7-8.

Li, Y.Z. 2011. Performance and welfare of gestating sows in group-housing systems. Internatl. Symp. on Animal Welfare, Nanjing Ag. Univ., Nanjing, China. May 6-9.

Li, Y.Z. 2011. Research on alternative swine production at WCROC. Workshop on Successful Options for Livestock Production, Land Stewardship Project (LSP), Redwood Falls, MN. Jan. 29.

Wang, L.H. and Y.Z. Li. 2011. Effects of farrowing system on agonistic behaviors of growing pigs at mixing. Proc., 72nd MN Nutrition Conf., Owatonna, MN. p. 65.

Li, Y.Z. 2010. An overview of research in swine behavior and welfare. College of Anim. and Vet. Sci., Qingdao Ag. Univ., Qingdao, China. Aug. 5.

Li, Y.Z. 2010. Building efficient alternative systems. Presented at 2010 Iowa Pork Congr., Des Moines, IA. Jan. 20-21.

Li, Y.Z. 2010. Research in animal behavior and its application. Presented at 2010 Conf. of the Chinese Environmental Management and Hygiene of Farm Animals, Innger Mongolia, China. July 30-31.

Li, Y.Z., S.K. Baidoo, L.J. Johnston, and J.E. Anderson. 2010. Effects of tryptophan supplementation on aggression among group-housed gestating sows. Proc., 71st MN Nutrition Conf., Owatonna, MN. p. 43.

Phillips, C.E., Y.Z. Li, and J. Anderson. 2010. Fear response in gestating sows. Proc., 10th ISAE North Amer. Reg. Mtg., Washington State Univ., Pullman, WA. p. 11.

Wang, L.H., and Y.Z. Li. 2010. Effects of previous housing in large groups on behavior of growing pigs at mixing. Proc., 10th ISAE North Amer. Reg. Mtg., Washington State Univ., Pullman, WA. p. 34.

Li, Y.Z. 2009. Animal welfare and animal production. College of Anim. Sci. Techn. Northeast Ag. Univ., Harbin, China (June 23), and College of Anim. Sci. Techn., Shenyang Ag. Univ., Shenyang, China (June 17).

Li, Y.Z. 2009. Effects of parity and maternal fear on piglet mortality in loose farrowing systems. Presented at Niman Ranch Ann. Mtg., Ames, IA. March 20.

Li, Y.Z., C.E. Phillips, S.K. Baidoo, and L.J. Johnston. 2009. Controlling aggression among gestating sows. Allen D. Leman Swine Conf., Univ. of Minnesota. 36:197.

Li, Y.Z. 2008. The benefits to farmer of implementing higher welfare systems and practices in swine production. Proc., Importance of Farm Animal Welfare Sci. to Sustainable Ag., Internatl. Forum, Beijing, China. Chinese Economists' Soc. for the Forestry, Livestock and Fisheries Industries. March 29-30. p. 47.

Li, Y.Z. 2008. Considering behavioral and welfare needs when selecting a housing system. Presented at Allen D. Leman Swine Conf., Pre-conference Section: Gestating Sow Housing, St. Paul, MN. Sep. 21.

Li, Y.Z. 2008. Reducing pre-weaning mortality of piglets in loose farrowing systems. Presented at Pork Niche Market Working Group Mtg., Des Moines, IA. Dec. 18

Li, Y.Z. and H.W. Gonyou. 2006. Eating sequences of gestating sows in group housing with electronic sow feeders. Proc., 40th Internatl. Congr. ISAE. p. 237.

Li, Y.Z. and H.W. Gonyou. 2006. Effects of stall width and sow size on behaviour of gestating sows. 25th Ann. Centralia Swine Res. Update. Vol. 2, Kirkton-Woodham Community Centre, Ontario, Canada. pp. 42-43.

Cao, H., Y.Z. Li, D. Luan, L. Sun, and X.F. Meng. 1995. Effects of cold stress and feed intake on heat balance of growing pigs of different breeds. Proc., 5th Natl. Conf. Farm Anim. Environ. Sci. Vol. 2:47-54 (in Chinese).

Meng, X.F., D. Luan, L. Sun, and Y.Z. Li. 1995. Effect of feed intake on metabolic heat production of Min Pigs. Proc., 5th Natl. Conf. Farm Anim. Environ. Sci. Vol. 2:60-64 (in Chinese).

Shan, Y.L., L. Sun, P. Yan, and Y.Z. Li. 1995. Effects of feed intake on thermal balance of growing pigs of different genetics. Proc., 5th Natl. Conf. Farm Anim. Environ. Sci. Vol. 2:55-59 (in Chinese).

Li, Y.Z., P. Yan, D. Luan, and Q.H. Wang. 1993. Effect of environmental temperature on energy metabolic rate of early weaning piglets of Min and Landrace. Proc., Internatl. Symp. Chinese Pig Breeds, Northeast Forestry Univ., Harbin, China. p. 274-278.

Li, Y.Z. 2017. Impacts of stress factors on performance, health, and well-being of farm animals. REEport, Multi-state Proj. # MIN-02-024 (for 10/1/2016 - 9/30/2017).

Li, Y.Z. 2017. Improving performance and welfare of swine in alternative housing systems. REEport, Proj. # MIN-02-023/Hatch (for 10/1/2016 - 9/30/2017).

Li, Y.Z., S. Cui, H. Zhang, L. Johnston, and S. Baidoo. 2017. Determining the minimal floor space allowance for gestating sows kept in pens with electronic sow feeders. Final Report to Natl. Pork Board, Proj. #14-041.

Li, Y. Z., S. Major, R. Carr, and A. Hernandez 2023.  Biofumigation to reduce swine parasite contamination on organic Pastures. Midwestern American Society of Animal Science Annual Meeting. Madison, WI. Mar. 13-15, 2023 (PSIV-3, abstract and a poster presentation).

Archer, C., A. Hilbrands, L. Johnston, B. Mote, T. Schmidt, and Y. Z. Li. 2023. Influence of Group Size on Performance and Tail Damage caused by Tail Biting in Undocked Growing-Finishing Pigs. Midwestern American Society of Animal Science Annual Meeting. Madison, WI. Mar. 13-15, 2023 (abstract and an oral presentation).

Hilbrands, A. M., Y. Z. Li, L. J. Johnston, R. B. Cox, W. F. Lazarus, W. Martin, F. Forcella, and R. Gesch. 2021. Camelina meal as an alternative ingredient in growing-finishing pig diets. J. Anim. Sci. 99 (Suppl. 3): 116-117.

Li, Y. Z. 2020. Feeding and nutritional strategies to improve welfare of group-housed gestating sows. [invited]. Animal Behavior, Health, and Well-Being Symposium: Feeding management and Nutritional Strategies for Improving Animal Welfare. American Society of Animal Science Midwest Section/ADSA Midwest Branch 2020 Joint Meeting. March 3, 2020. Omaha, Nebraska. Abstr.196.

Li, Y. Z. J. Zhu, M. Reese, E. Buchanan, and L. Johnston. 2020. Effects of chilled drinking water and cooled floor pads on behavior of lactating sows under heat stress. American Society of Animal Science Midwest Section/ADSA Midwest Branch 2020 Joint Meeting. March 2-4, 2020. Omaha, Nebraska. Abstr. PSV-6.

Li, Y. Z., A. Hernandez, R. Carr, S. Major, and D. DeWitte. 2020. Parasite prevalence and fecal egg counts on organic pig farms. American Society of Animal Science Midwest Section/ADSA Midwest Branch 2020 Joint Meeting. March 2-4, 2020. Omaha, Nebraska. Abstr. PSVIII-21.

Lou, M., Y. Z. Li, B. Ventura, and J. Deen. 2020. Struggle behavior and vocalization of male piglets during castration. American Society of Animal Science Midwest Section/ADSA Midwest Branch 2020 Joint Meeting. March 2-4, 2020. Omaha, Nebraska. Abstr. 82.

Johnston, L. J. M. Reese, E. Buchanan, Y. Z. Li, A. M. Hilbrands, B. M. Lozinski, J. Tallaksen, K. A. Janni, B. Hetchler, and E. Cortus. 2020. Effects of a solar-powered cooling system on performance of heat-stressed lactating sows. American Society of Animal Science Midwest Section/ADSA Midwest Branch 2020 Joint Meeting. March 2-4, 2020. Omaha, Nebraska. Abstr. 152.

Furo, G., C. J. Cardona, Y. Li, S. L. Noll. 2020. Comparison of footpad dermatitis scores in market turkey hens. Poster and oral presentation. Poultry Science Vol. 99 (E-suppl. 1): 14 (Abstr. 24)

Furo*, G., C. J. Cardona, Y. Li, R.M. Hulet, K. A. Janni, S. L. Noll. 2020. Bedding and stocking density influenced the relationship of litter characteristics to footpad dermatitis in market turkey hens. Poultry Science Vol. 99 (E-suppl. 1): 14 (Abstr. 25). 

St. Charles, K M., Y. Z. Li, and L. J. Johnston. Exploring preferential networks of grower-finisher pigs and potential connections to tail biting. Submitted to The 8^th International Conference on the Assessment of Animal Welfare at Farm and Group Level (The conference was rescheduled for 2021 due to COVID).

Li, Y. Z., M. Lou, M. Reese, E. Buchanan, and L. Johnston. 2019. Effects of cooled floor pads and cooled drinking water on behavior of lactating sows under heat stress. J. Anim. Sci. 97 (Supplement 2): 2–3.

Li, Y. Z., and L. Johnston. 2019. Social structures, social ties, and development of tail biting in growing-finishing pigs. J. Anim. Sci. 97 (Supplement 2): 236.

Li, Y. Z., K. St Charles, and L. J. Johnston.2019. Association between social preference and development of tail biting in growing-finishing pigs. Proceedings of the 17^th International Conference on Production Diseases in farm Animals. Page 84. Bern, Switzerland. Jun 27 -29, 2019. Available at:  https://boris.unibe.ch/131406/1/Proceedings%20ICPD%202019.pdf

St Charles, K., Y. Z. Li, and L. Johnston. 2019. Utilization of social network analysis to assess association between positive social ties and the prevalence in tail biting in growing pigs. Pig Welfare Symposium 2019, Minneapolis, MN. Nov. 13-15. (Abstr.12). 

Johnston, L. J., K. T. Sharpe, M. H. Reese, E. S. Buchanan, J. E. Tallaksen, A. M. Hilbrands, K. A. Janni, B. Hetchler, and Y. Z. Li. 2019. Quantifying use of the electricity to heat piglet creep areas in farrowing rooms. 17^th Biennial Conference of Australiasian Pig Science Association. Adelaide, Australia, Nov. 17-20, 2019 (Abstr. S21). 

Li, Y. Z., H. F. Zhang, L. Johnston, and M. Dawkins. 2018. Utilization of optical flow to monitor development of tail biting outbreaks in pigs. 12^th World Conference of Animal Production, July 7, 2018 Vancouver, BC. Canada. Poster Session III-2. Available at: https://www.eventscribe.com/2018/ASAS-Annual/posteragenda.asp

Li, Y. Z., S. Q. Cui, L. J. Johnston, and S. K. Baidoo. 2018. Effect of body condition measured using a sow caliper on performance of group-housed gestating sows. ASAS Annual meeting, July 10, 2018 Vancouver, BC. Canada. Poster Session X – PSX-39. Available at: https://www.eventscribe.com/2018/ASAS-Annual/posteragenda.asp. 

Li, Y. Z., S. Q. Cui, X. J. Yang, H. Zhang, L. J. Johnston, and S. K. Baidoo. 2018. Evaluation of floor space allowance for group-housed gestating sows: Application of Allometric Principles. J. Anim. Sci. 96 (Suppl. 2): p. 57 (Abstr. 108) / doi. 10.1093./jas/sky073.106.

Li, Y. Z., S. Q. Cui, X. J. Yang, L. J. Johnston, and S. K. Baidoo. 2018. Evaluating body condition of group-housed gestating sows: Sow caliper measurements vs. backfact thickness and visual scores. J. Anim. Sci. 96 (Suppl. 2): p. 47 (Abstr. 90) / doi: 10. 1093/jas/sky073.088.

Li, Y.Z., S. Cui, X. Yang, B.A. Crooker, S.K. Baidoo, and L.J. Johnston. 2017. Salivary cortisol concentrations of group-housed gestating sows: Individual vs. group samples. J. Anim. Sci. 95 (Suppl. 2): 8-9. (Abstr. 18).

Li, Y.Z., S. Cui, H. Zhang, L. Johnston, and S. Baidoo. 2017. Minimal floor space allowance for gestating sows housed in pens with electronic sow feeders. Proc., Pig Welfare Symp., Des Moines, IA. Nov. 7-9. p. 35 (Abstr.).

Li, Y.Z. and L.J. Johnston. 2017. Effect of tail docking on welfare and performance of pigs during nursery and growing-finishing periods. J. Anim. Sci. 95(Suppl. 2):34 (Abstr. 73).

Li, Y.Z., H. Zhang, L.J. Johnston, and W. Martin. 2017. Do pigs form social structures: An application of social network analysis? J. Anim. Sci. 95 (Suppl. 2):7 (Abstr. 15).

Li, Y.Z., H. Zhang, L. Johnston, and W. Martin. 2017. Understanding tail biting in pigs through social network analysis. Proc., 7th Internatl. Conf. Assess. of Animal Welfare Farm and Group Level. I.C. De Jong and P. Koene, Eds. Ede, The Netherlands, Sep. 5-8. p. 87 (Abstr.).

Li, Y.Z., J. Anderson, A. Holten, A.M. Hilbrands, J. Holen, and L.J. Johnston. 2016. Understanding tail biters and victimized pigs during outbreaks of tail biting. J. Anim. Sci. 94: (Suppl. 2): 8 (Abstr. 18). Oral Presentation at the Midwest ASAS Ann. Mtg., Des Moines, IA.

He, Y., S. Cui, J. Deen, G.C. Shurson, and Y.Z. Li. 2016. Effects of feeder space allowance on behavior of slow-growing pigs during the nursery period. J. Anim. Sci. 94 (Suppl. 2): 4 (Abstr. 009). Poster Presentation at the Midwest ASAS Ann. Mtg., Des Moines, IA.

Cui, S.Q., J.E. Anderson, L.H. Wang, J. Deen, and Y.Z. Li. 2015. Automated monitoring of swine behavior using accelerometers: Classification of behavior of nursery pigs from acceleration patterns. J. Anim. Sci. 93 (E-Suppl.2):102 (Abstr. 232).

Cui, S.Q., X.B. Wang, X.K. Huang, Y. Xu, and Y.Z. Li. 2015. Association of IgG concentration in colostrum with diarrhea in piglets born to Min and Landrace sows. J. Anim. Sci. 93 (E-Suppl.2):106 (Abstr. 240).

Cui, S.Q., Y. Xu, X.K. Huang, X.B. Wang, and Y.Z. Li. 2015. A comparison for IgG absorption between Min and Landrace piglets. J. Anim. Sci. 93 (E-Suppl. 3):635 (Abstr. W48).

He, Y., J. Deen, G.C. Shurson, and Y.Z. Li. 2015. Identifying risk factors of slow growth of pigs from birth to market. J. Anim. Sci. 92 (E-Suppl.2):103 (Abstr. 235).

He, Y., J. Deen, G.C. Shurson, and Y.Z. Li. 2015. Physiological characteristics of slow growing pigs from birth to market. J. Anim. Sci. 93 (E-Suppl.2):103 (Abstr. 234).

Li, Y.Z., K. McDonalds, and H.W. Gonyou. 2015. Determining feeder space requirement for growing-finishing pigs. J. Anim. Sci. 93 (E-Suppl. 3):17 (Abstr. M30).

Seddon, Y.M., M.M. Bouvier, Y.Z. Li, and J.A. Brown. 2015. Mixing strategies for group-housed gestating sows: Effects on productivity. J. Anim. Sci. 93 (Suppl. 2):3 (Abstr. 006).

Bouvier, M.M., S.A. Ethier, Y.M. Seddon, Y.Z. Li, and J.A. Brown. 2014. Mixing strategies for group housed sows: Effects on aggression and productivity. Intl. Soc. Appl. Ethol. (ISAE), North Amer. Reg. Mtg., East Lansing, MI. (Abstr.) May 30-31.

He, Y., J. Deen, G.C. Shurson, C. Chen, and Y.Z. Li. 2014. Identifying factors associated with slow growth of pigs from birth to market. Allen D. Leman Swine Conf., Recent Res. Rep. Vol. 41:31.

He, Y., J. Deen, G.C. Shurson, and Y.Z. Li. 2014. Identifying characteristics of slow-growing pigs from birth to 9 wk of age and growth performance responses to feeder space postweaning. J. Anim. Sci. 92 (Suppl.2):6 (Abstr. 013).

Li, Y.Z., and L.H. Wang. 2014. Effects of group size and social rank on welfare and performance of gestating sows in a group-housing system with floor feeding. J. Anim. Sci. 92 (E-Suppl.2):406 (Abstr. 0812).

Wang, L.H., L.J. Johnston, and Y.Z. Li. 2014. Effects of social rank on agonistic behaviors and associated injuries of gestating sows at mixing. J. Anim. Sci. 92 (Suppl.2):115 (Abstr. 262).

Wang, L.H., L.J. Johnston, and Y.Z. Li. 2014. What determines the social rank of a sow in a group-housing system? J. Anim. Sci. 92 (Suppl.2):116 (Abstr. 263).

Johnston, L., Y.Z. Li, and A. Hilbrands. 2013. Performance and well-being of pregnant sows housed in pens retrofitted from stalls. J. Anim. Sci. 91 (E-Suppl. 2):18 (Abstr. O054).

Li, X., G.C. Shurson, S.K. Baidoo, Y.Z. Li, and L.J. Johnston. 2013. Interactive effects of distillers dried grains with solubles (DDGS) and housing system on litter performance, sow productivity, and sow longevity over 3 reproductive cycles. J. Anim. Sci. 91 (E-Suppl. 2):89 (Abstr. P003).

Li, Y.Z.and H.W. Gonyou.2013. Effects of management options on performance of gestating sows housed in an electronic sow feeder system. J. Anim. Sci. 91 (E-Suppl. 2):19 (Abstr. O057).

Swanson, J., Y. He, L.J. Johnston, and Y.Z. Li. 2013. Can feeding stalls be used by low ranking sows as hiding spaces at mixing? J. Anim. Sci. 91 (E-Suppl. 2):89 (Abstr. P001).

Li, Y.Z., L.J. Johnston, S.K. Baidoo, C.E. Phillips, L.H. Wang, X.L. Xie, and G.C. Shurson. 2012. Effect of feeding DDGS diets on behaviors of gestating sows in different housing systems. Abstracts of 2012 ADSA/ASAS Mtg. p. 507 (Abstr. W16).

Li, Y.Z., L.H. Wang, L.J. Johnston, A.M. Hilbrands, and X.L. Xie. 2012. Behavioral response of nursery pigs to reduced nocturnal temperature. Abstracts of 2012 Midwest ADSA/ASAS Mtg. p. 20 (Abstr. 52).

Li, Y.Z., L. H. Wang, L.J. Johnston, A.M. Hilbrands, and X.L. Xie. 2012. Sorting by parity improves welfare and performance of young sows in a group-housing gestation system. Abstracts of 2012 Midwest ADSA/ASAS Mtg. p. 19 (Abstr. 48).

Li, Y.Z., J.E. Anderson, and L.J. Johnston. 2011. Animal-related factors affecting piglet mortality in loose farrowing systems. J. Anim. Sci. 89 (E-Suppl.2):50.

Phillips, C.E., Y.Z. Li, J.E. Anderson, L.J. Johnston, G.C. Shurson, and J. Deen. 2011. Assessment of sow fear, parity and season on piglet mortality in loose farrowing systems. J. Anim. Sci. 89 (E-Suppl.2):49.

Phillips, C.E., Y.Z. Li, L.J. Johnston, G.C. Shurson, J. Deen, and C. Farmer. 2011. Association of sow fear with prolactin and cortisol concentrations pre- and postfarrowing. J. Anim. Sci. 89 (E-Suppl.1):12.

Li, Y.Z., J.E. Anderson, and L.J. Johnston. 2010. Effect of parity on pre-weaning mortality and growth performance of piglets in a bedded, group-farrowing system. J. Anim. Sci. 88 (E-Suppl. 3):45 (Abstr. 5).

Li, Y.Z., L.J. Johnston, and J.E. Anderson. 2010. Effect of lactation housing on growth performance of pigs. J. Anim. Sci. 88 (E-Suppl. 3):49 (Abstr. 19).

Li, Y.Z., C.E. Phillips, S.K. Baidoo, and L.J. Johnston. 2010. Controlling aggression among gestating sows. J. Anim. Sci. 88 (E-Suppl. 3):49 (Abstr. 17).

Li, Y.Z. 2009. Effects of maternal fear on pre-weaning mortality of piglets in a loose farrowing system. J. Anim. Sci. 87:(Suppl. 3):42.

Li, Y.Z. and L.J. Johnston. 2007. Effects of familiarity and weight variation on aggression among grow-finish pigs following regrouping. J. Anim. Sci. Vol. 85 (Suppl. 2):49.

Li, Y.Z., L.J. Johnston, and A.M. Hillbrands. 2006. Factors related to pre-weaning mortality of piglets in a bedded, group farrowing system. J. Anim. Sci. Vol. 84 (1):269.

Harris, M.J., Y. Li, and H.W. Gonyou. 2001. Savaging gilts and second parity sows: A study of seven commercial farms. J. Anim. Sci. 79 (1):15 (Abstr.).

Li, Y.Z. and H.W. Gonyou. 2001. Effect of supplementary tryptophan on aggression of growing pigs following regrouping. Proc., 35th Internatl. Congr. ISAE. p. 202 (Abstr.).

Li, Y.Z. and H.W. Gonyou. 2001. Water intake and wastage by grower/finisher pigs at nipple drinkers. Advances in Pork Production, Banff Pork Seminar. Vol. 12 (Abstr. 39).

Li, Y.Z., D.M. Luan, H. Cao, and R.J. Christopherson. 1996. Effect of short cold exposure on heat production of weaned piglets. Proc., Can. Soc. Anim. Sci., Lethbridge. p. 49.

Li, Y. Z. 2022. Organic pigs and hybrid rye. A featured article at swineweb. Jan. 2022.  https://www.swineweb.com/organic-pigs-and-hybrid-rye/. Accessed on Mar. 23, 2022.

Li, Y. Z. 2022. Parasite infection in organic pigs. An extension article for WCROC website. https://wcroc.cfans.umn.edu/research/swine/parasite-infection-organic-pigs.  Accessed on Mar. 23, 2022.

Li, Y. Z. 2021. Organic pigs and hybrid rye. WCROC Newsletter. Dec. 2021. https://wcroc.cfans.umn.edu/about-us/wcroc-news/organic-pigs-hybrid-rye. Accessed on Mar. 23, 2022.  

Li, Y. Z. 2021. Feeding camelina to organic pigs. WCROC Newsletter. May 2021. https://wcroc.cfans.umn.edu/research/swine/camelina-meal-organic-pigs.  Accessed on Dec. 14, 2021.

Li, Y. Z. 2020. Effects of pigs per feeder hole on performance in nursery pigs. An invited article for pig333.com (Professional Pig Community). https://www.pig333.com/articles/effects-of-pigs-per-feeder-hole-on-performance-in-nursery-pigs_16260/#comments. Accessed on Dec. 14, 2021.

Li, Y. Z. 2020. Can camelina meal be used as a feed ingredient to reduce parasites in organic pig production? WCROC. Newsletter. June 2020. https://wcroc.cfans.umn.edu/wcroc-news/camelina-feed-ingredient.

Reese, C., Y. Z. Li, R. Gesch, and F. Forcella. 2020. Growing winter Camelina organically. WCROC. Newsletter. April 2020. https://wcroc.cfans.umn.edu/wcroc-news/organic-winter-camelina. Accessed on Dec. 14, 2021.

Lou, M., B. Ventura, J. Deen, and Y. Z. Li. Surgical castration changes struggle behavior and vocalizations in male piglets. Revision submitted to J. Appl. Anim. Welf. Sci.

Li, Y. Z., S. Q. Cui, S. K. Baidoo, and L. J. Johnston. Does Sow Caliper accurately measure backfat depth and visual condition score of sows? Submitted to J. Swine Health and Production [In revision].

Zhu, Y., J. Johnston, M. Reese, E. Buchanan, J. Tallaksen, A. Hilbrands, and Y. Z. Li. Effects of cooled floor pads combined with chilled drinking water on behavior and performance of lactating sows under heat stress. Submitted to J. Anim. Sci.

Johnston, L., Y. Z. Li, A. Hibrands, R. Cox, W. Lazarus, W. Martin. F. Forcella, and R. Gesch. 2019. Feeding camelina meal to pigs. WCROC Newsletters. Mar. 2019.

Camelina cover-crop use may support pig growth, soil health (an article in Feed navigator. com. Apr. 2019). Available at: https://www.feednavigator.com/Article/2019/04/18/Camelina-use-may-support-pig-growth-soil-health

Li, Y. Z., R. Carr, and A. Hernandez. 2019. Research on parasite control in organic swine production. WCROC Newsletters. Jun. 2019.

Li, Y. Z., L. Johnston, C. Reese, J. Tallaksen, F. Forcella, R. Gesch, B. Lazarus, R. Cox, and W. Martin. 2019. Integrating winter camelina into organic pig production systems. The Stevens County Times. 2019 Farm Section. March 9, 2019.

Li, Y. Z., L. Johnston, B. Heins, J. Tallaksen, B. Lazarus, R. Cox, and W. Martin. 2019. Identifying challenges in organic swine production. The Stevens County Times. 2019 Farm Section. March 9, 2019.

DeWitte, D. 2019. U of M currently conducting organic swine research. The land. Nov. 2019. Available at: https://www.thelandonline.com/news/u-of-m-currently-conducting-organic-swine-research/article.

Li, Y. Z. 2018. Organic swine research at the WCROC – Reducing feed cost by utilizing camelina cover crops. WCROC Newsletters. Dec. 2018.

Final Report: Integrated Research and Extension Planning – Organic Swine (USAD Organic Research and Extension Initiatives), Aug 31, 2019.

Brown, J., L. Johnston, Y. Li, T. Parsons, T. Safranski, and Y. Seddon. 2017. A guide for managing sows with free-access stalls. Natl. Pork Board, Des Moines, IA. Pub. No. 04932.

Johnston, L., J. Brown, Y. Li, T. Parsons, T. Safranski, and Y. Seddon. 2017. A guide for managing sows with feeding stalls. Natl. Pork Board, Des Moines, IA. Pub. No. 04933.

Li, Y.Z. 2017. How much floor space do group housed sows need? WCROC News, Morris, MN. Dec. 29.

Li, Y.Z. 2017. How much floor space does a pregnant sow need in a group-hosing system with electronic sow feeders? WCROC Newsletter, Aug. 2017.

Li, Y.Z. 2017. Transition to organic swine production. WCROC News, Morris, MN. Oct. 5.

Li, Y., J. Brown, L. Johnston, T. Parsons, T. Safranski, and Y. Seddon. 2017. A guide for managing sows with floor feeding. Natl. Pork Board, Des Moines, IA. Pub. No. 04934.

Li, Y., H. Zhang, L. Johnston, L. Jacobson, and W. Martin. 2017. Tail-biting in growing-finishing pigs. Res. Rep. - Animal Welfare, Natl. Pork Board/Pork Checkoff.

Parsons, T., J. Brown, L. Johnston, Y. Li, T. Safranski, and Y. Seddon. 2017. A guide for managing sows with electronic sow feeding (ESF). Natl. Pork Board, Des Moines, IA. Pub. No. 04931.

Safranski, T., J. Brown, L. Johnston, Y. Li, T. Parsons, and Y. Seddon. 2017. A guide for managing sows with gestation stalls. Natl. Pork Board, Des Moines, IA. Pub. No. 04936.

Seddon, Y., J. Brown, L. Johnston, Y. Li, T. Parsons, and T. Safranski. 2017. A guide for managing sows with trickle feeding. Natl. Pork Board, Des Moines, IA. Pub. No. 04935.

Li, Y.Z. 2016. Application of social network analysis to animal welfare research. WCROC Newsletters. April.

Li, Y.Z. 2016. Docking the tail or not: Effect on welfare and performance of growing-finishing pigs. WCROC Newsletters. Dec. 2016

He, Y.J., G.C. Shurson, J. Deen, and Y.Z. Li. 2015. Ample feeder space benefits slow growing pigs in nursery phase. UMN Swine Ext.

Li, Y.Z. 2015. A new research project of floor space allowance for group-housed gestating sows. News From the WCROC. Feb. 25.

Li, Y.Z. 2015. A new research project on swine welfare (tail docking and tail biting) at the WCROC. News from the WCROC. May 27.

Li, Y.Z. 2015. Tail biting in pigs – What do we know about it? (PDF) News from the WCROC. Sep. 2.

Li, Y.Z. 2014. Biosecurity on alternative swine farms. West Central News, WCROC. Jan. 22.

Li, Y.Z. 2014. Tail biting and tail docking in pigs. West Central News, WCROC. Nov. 12.

Li, Y.Z. 2014. Update on sow welfare research at the 2014 Animal Science Annual Joint Meeting. West Central News, WCROC. Aug. 6.

Li, Y.Z. 2015. Housing and management options for group-housed gestating sows. Novel Livestock Housing Webcast, eXtension. March 6.

Li, Y.Z., W. Martin, and S. Schieck. 2015. Biosecurity for alternative pig farms. Pig Information Gateway. Nov. 11.

Li, Y.Z. 2014. New project in 2015: Research on tail biting and tail docking in pigs. UMN Swine Ext.

Li, Y.Z. 2014. Sow welfare research update: Solving the problem of hunger and aggression in gestating sows. UMN Swine Ext.

Li, Y.Z. 2014. What determines the social rank of a sow in a group-housing system? UMN Swine Ext.

Li, Y.Z. 2014. What determines the social ranking of a sow in a group-housing system? West Central News, WCROC. April 30.

Martin, W., S. Schieck, and Y.Z. Li. 2014. Biosecurity for alternative pig farms. Small Farms, UMN Ext.

Li, Y.Z. 2012. Minimizing aggression among group-housed gestating sows at mixing. Pork Information Gateway, PIG 05-03-01.

Li, Y.Z. 2011. How much space does a sow need in a group-housing system? UMN Swine Ext.

Li, Y.Z. 2011. Sorting sows by parity to reduce aggression in group-housing systems. UMN Swine Ext.

Li, Y.Z. and L.J. Johnston. 2012. 11 tips for managing pregnant sows in group housing. Ag News Wire, UMN Ext.

Li, Y.Z. 2010. Animal behavior and welfare domain in Pig Information Gateway. West Central News, Univ. of Minnesota. April 28.

Li, Y.Z. 2010. Animal welfare assessment – Animal-based approach. West Central News, Univ. of Minnesota. Nov. 10.

Li, Y.Z. 2009. Controlling aggression among group-housed gestating sows. West Central News, Univ. of Minnesota. June 24.

Li, Y.Z. 2009. Pre-weaning mortality of piglets – How can we solve the problem? West Central News, Univ. of Minnesota. Oct. 14.

Li, Y.Z. 2009. Transition of gestation stalls to group-housing – How much space does a sow need in a group-housing system? West Central News, Univ. of Minnesota. March 4.

Li, Y.Z. 2008. Behavior and performance of pigs previously housed in large groups. West Central News, Univ. of Minnesota. May 5.

Li, Y.Z. 2008. Is maternal fear associated with piglet survival in loose farrowing systems? West Central News, Univ. of Minnesota. Sep. 17.

Li, Y.Z. 2008. What is the real picture of piglet pre-weaning mortality in loose farrowing systems? West Central News, Univ. of Minnesota. July 9.

Li, Y.Z. 2007. Defining and assessing animal welfare. West Central News, Univ. of Minnesota. July 18.

Li, Y.Z. 2007. Piglet pre-weaning mortality in alternative swine housing. West Central News, Univ. of Minnesota. Nov. 7.

Martin, W. and Y.Z. Li. 2007. Alternative swine production roundtable meetings held in 2007. West Central News, Univ. of Minnesota. April 4.

Li, Y.Z. and H.W. Gonyou. 2001. Effects of nipple drinker height and flow rate on water wastage in grower and finisher pigs. Prairie Swine Centre Ann. Rep. 2001. p. 32.

Li, Y. Z. 2022. Organic pigs and hybrid rye. Stevens County Times. Jan. 25, 2022.

DeWitte, D., Y. Z. Li, R. Carr, A. Hernandez, and S. Major. 2020. UM organic swine research underway. Steven County Times. 2020 Farm Progress (B9). March 24, 2020.

Lozinski, B., M. Saqui-Salces, G. C. Shurson. P. E. Urriola, B. Frederick, M. Wilson, Y. Li, and L. J. Johnston. 2020. Does water quality impact nursery pig performance and health? National Hog Farmer Magazine.

Li, Y. Z., L. Johnston, C. Reese, J. Tallaksen, F. Forcella, R. Gesch, B. Lazarus, R. Cox, and W. Martin. 2019. Integrating winter camelina into organic pig production systems. The Stevens County Times. 2019 Farm Section. March 9, 2019.

Li, Y. Z., L. Johnston, B. Heins, J. Tallaksen, B. Lazarus, R. Cox, and W. Martin. 2019. Identifying challenges in organic swine production. The Stevens County Times. 2019 Farm Section. March 9, 2019.

Johnston, L., M. Reese, E. Buchanan, Y. Z. Li, K. Yanni, and K. Sharpe. 2018. Solar cooling of sows. 2018 Farm Progress Edition. Stevens County Times, March 17, 2018.

Li, Y.Z. 2017. Docking the tail or not: Effect of welfare and performance of growing-finishing pigs. The Kenyon Leader, M. Phipps, Ed. Jan. 11.

Li, Y.Z. (contributor). 2017. Swine research at the University of Minnesota tackles animal welfare concerns. StarTribune (Tom Meersman). Feb. 12.

Li, Y., S. Cui, H. Zhang, L. Johnston, and S. Baidoo. 2017. How much floor space do group-housed sows need? Natl. Hog Farmer Magazine Annual Res. Rev. Dec. Issue. pp. 5-6.

Li, Y.Z. 2016. Features from the farm: Application of social network analysis to animal welfare research. Morris Sun Tribune. Apr. 22.

Li, Y.Z., L. Johnston, and W. Martin. 2016. Research reaffirms the necessity of tail docking for pigs. National Hog Farmer, 2016 Res. Rev. p. 18.

Li, Y.Z. 2014. Using individual stalls to protect low ranking sows in group housing systems. Morris Sun Tribune, Farm Edition. March 15.

Johnston, L., Y.Z. Li, and W.F. Lazarus. 2012. Retrofitting gestation stalls to grouphousing – A field study on performance and economics. National Hog Farmer. Aug. 15. p. 14-19.

Johnston, L.J. and Y.Z. Li. 2011. Reducing nocturnal temperature for nursery pigs. Morris Sun Tribune (Ag Special Supplement), Morris, MN. D4. March 12.

Li, Y.Z. and L.J. Johnston. 2011. Grouping parity 1 sows with gilts improves welfare, performance. National Hog Farmer, 2011 Swine Res. IV-8 Rev.: 19-20. Dec. 15.

Li, Y.Z. 2010. Controlling aggression among group-housed gestating sows. The Land, The Pork Professor. A30. March 19.

Li, Y.Z. 2010. Reducing piglet mortality in loose farrowing systems. The Land. June 11.

Li, Y.Z., J.E. Anderson, L.J. Johnston, and A.M. Hilbrands. 2010. Effect of parity on pre-weaning mortality and growth performance of piglets in a bedded, group-farrowing system. Morris Sun Tribune (A Special Supplement), Morris, MN. D9. March 14.

Li, Y.Z. 2009. Is maternal fear associated with piglet survival in loose farrowing systems? Morris Sun Tribune (A Special Supplement), Morris, MN. D9. March.

Li, Y.Z. and L.J. Johnston. 2008. Behavior and performance of pigs previously housed in large groups. Morris Sun Tribune (A Special Supplement), Morris, MN. D8. March 2008.

Li, Y.Z., L.J. Johnston, and A.M. Hilbrands. 2007. Reducing pre-weaning mortality of piglets in a loose farrowing system. Morris Sun Tribune (A Special Supplement), Morris, MN. D10. March.