Education
- Ph.D., Animal Environmental Physiology, Hiroshima University, Hiroshima, Japan, 1991
- M.S., Animal Production, Northeast Agricultural University, Harbin, China, 1985
- B.S., Animal Science, Shenyang Agricultural University, Shenyang, China, 1982
Research Interests
Current research includes: 1) Managing young sows in group-gestation housing systems; 2) Effects of maternal fear on piglet mortality in loose farrowing systems; 3) Effects of previously housing systems on behavior and performance of pigs.
Outreach
Programs
- Workshops on swine management, both in confinement and alternative systems.
- Improving performance and welfare of swine in alternative swine housing systems.
- Management of group-housed gestating sows.
Publications
(2007-2011)
- Refereed Articles -
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.
-Proceedings -
Li, Y.Z., C.E. Phillips, S.K. Baidoo, and L.J. Johnston. 2010. Effects of tryptophan supplementation on aggression among group-housed gestating sows. Proc., 71st Minnesota Nutr. Conf., Owatonna, MN. p. 43.
Phillips, C.E., Y.Z. Li, and J. Anderson. 2010. Fear response in gestating sows. Proc., 10th ISAE North Am. 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 Am. Reg. Mtg., Washington State Univ., Pullman, WA. p. 34.
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. of Importance of Farm Animal Welfare Science to Sustainable Agriculture, International Forum, Beijing, China. Chinese Economists’ Society for the Forestry, Livestock and Fisheries Industries. p. 47.
- Presentation at Professional Meetings -
Li, Y.Z. 2010. An overview of research in swine behavior and welfare. College of Animal and Veterinary Sci., Qingdao Agric. Univ., Qingdao, China. Aug. 5.
Li, Y.Z. 2010. Building efficient alternative systems. Presented at 2010 Iowa Pork Congress, Des Moines, IA. Jan. 20-21.
Li, Y.Z. 2010. Research in animal behavior and its application. Presented at 2010 Conference of the Chinese Environmental Management and Hygiene of Farm Animals, Innger Mongolia, China. July 30-31.
Li, Y.Z. 2009. Animal welfare and animal production. College of Animal Sci. Techn. Northeast Agric. Univ., Harbin, China (June 23) and College of Animal Sci. Techn., Shenyang Agric. 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 Annual Meeting, Ames, IA. March 20.
Li, Y.Z. 2008. The benefits to farmer of implementing higher welfare systems and practices in swine production. Presented at Importance of Animal Welfare Science to Sustainable Agriculture, International Forum, Beijing, China. March 29-30.
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.
- Outreach Publications -
Li, Y.Z. 2010. Controlling aggression among group-housed gestating sows. The Land. March 19: A30 – The Pork Professor.
Li, Y.Z. 2010. Reducing piglet mortality in loose farrowing systems. The Land. June 11.
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. 2007. Defining and assessing animal welfare. West Central News, Univ. of Minnesota. July 18.
- Abstracts -
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): p. 49.
- Popular Press -
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. March 14: D9.
Li, Y.Z. 2009. Is maternal fear associated with piglet survival in loose farrowing systems? Morris Sun Tribune (A Special Supplement), Morris, MN. March 2009: D9.
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. March 2008: D8.
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. March 2007: D10.
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