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University Scientist Research Projects

• Growth and Development
• Interactions with Milkweed
• Monarch Vital Statistics
• Parasites and Natural Enemies
• Reproductive Biology
• Conservation
• Migration
• Population Dynamics
• Human Impact
• Overwintering
• Outreach
• General Issues

Growth and Development

• Emergence Times of Adult Monarch Butterflies - 2004
  Grant Bowers
  
  University of Minnesota, Saint Paul, MN
• Monarch Class Data - 2004
  Emma Lastine
  
  University of Minnesota, Saint Paul, MN
• Effects of photoperiod, temperature, and host plant age on induction of reproductive diapause and development time in Danaus plexippus - 2002
  Liz Goehring and Karen Oberhauser
  
  Goehring, L. & Oberhauser, K.S. 2002. Effects of photoperiod, temperature and host plant age on induction of reproductive diapause and development time in Danaus plexippus. Ecol. Entom. 27:674-685.
  
• Effects of Duration and Timing of Heat Stress on Monarch Butterfly (Danaus plexippus) (Lepidoptera: Nymphalidae) Development - 2002
  Heather A. York and Karen S. Oberhauser
  
  York, H. & K.S. Oberhauser. 2002. Effects of duration and timing of heat stress on monarch butterfly (Lepidoptera: Danaidae) development. J. Kans. Entom. Soc. 75:290-298.
  

Interactions with Milkweed

• Compensatory Feeding in Danaus plexippus (Lepidoptera: Nymphalidae) in Response to Variation in Host Plant Quality - 2004
  Bethann Lavoie and Karen Oberhauser
  
  Lavoie, B. & Oberhauser, K. 2004. Compensatory feeding in Danaus plexippus (Lepidoptera: Nymphalidae) in response to variation in host plant quality. Environ. Entomol. 33:1062-1069.
  

Monarch Vital Statistics

• Does the size of different summer breeding generations of monarchs vary?
  Sonia Altizer, Karen Oberhauser, and Michelle Prysby
  
  University of Minnesota, St. Paul, MN
• Monarch Butterfly Wing Patterns
  Kayla G. Schiltgen
  

Parasites and Natural Enemies

• Tachinid Flies and Monarch Butterflies: Citizen Scientists Document Parasitism Patterns over Broad Spatial and Temporal Scales - 2012
  Karen Oberhauser
  
  Oberhauser, KS. 2012. Tachinid flies and monarch butterflies: Citizen Scientists document parasitism patterns over broad spatial and temporal scales. American Entomologist 58:19-22.
  
• Monarch butterfly migration and parasite transmission in eastern North America - 2011
  Rebecca A. Bartel, Karen S. Oberhauser, Jacobus De Roode, and Sonia M. Altizer
  
  Bartel, RE, KS Oberhauser, JC De Roode, SM Altizer. 2011. Monarch migration, seasonal habitat use and parasite transmission in eastern North America. Ecology 92(2): 342-351.
  
• Crowding and disease: effects of host density on response to infection in a butterfly – parasite interaction - 2009
  Elizabeth Lindsey, Mudresh Meta, Varun Dhulipala, Karen Oberhauser and Sonia Altizer
  
  Lindsey, E, M Mudresh, V Dhulipala, KS Oberhauser, S Altizer. 2009. Crowding and disease: effects of host density on response to infection in a butterfly-parasite interaction. Ecological Entomology 34:551–561.
  
• Natural Enemies and Survival of Monarch Eggs and Larvae - 2004
  Michelle Prysby
  
  Prysby, M. 2004. Natural Enemies and Survival of Monarch Eggs and Larvae. Pp. 27-38. In Oberhauser, K.S. & M.J. Solensky, eds. The Monarch Butterfly: Biology and Conservation. Cornell University Press. Ithaca NY.
  
• Effects of Monarch Larval Host Plant Chemistry and Body Size on Polistes Wasp Predation - 2004
  Linda Rayor
  
  Rayor, L. 2004. Effects of Monarch Larval Host Plant Chemistry and Body Size on Polistes Wasp Predation. Pp. 39-46. In Oberhauser, K.S. & M.J. Solensky, eds. The Monarch Butterfly: Biology and Conservation. Cornell University Press. Ithaca NY.
  
• Transmission of the Protozoan Parasite Ophryocystis elektroscirrha in Monarch Butterfly Populations: Implications for Prevalence and Population-Level Impacts - 2004
  Sonia M. Altizer, Karen S. Oberhauser, and Kari A. Geurts
  
  Altizer, S. M, K. S. Oberhauser and K. A. Geurts. 2004. Transmission of the protozoan parasite Ophyocystis elektroscirrha in monarch butterfly populations: implications for prevalence and population-level impacts. Pp. 203-218. In: Oberhauser, K.S. and M.J. Solensky, eds. The Monarch Butterfly: Biology and Conservation. Cornell University Press. Ithaca NY.
  
• Associations between host migration and the prevalence of a protozoan parasite in natural populations of adult monarch butterflies - 2000
  Sonia Altizer, Karen S. Oberhauser, and Lincoln P. Brower
  
  Altizer, S.M., K.S. Oberhauser and L.P. Brower. 2000. Associations between host migration and the prevalence of a protozoan parasite in natural populations of monarch butterflies. Ecol. Entomol. 25:125-139. (received The Royal Entomological Society's Excellence in Ecological Entomology Reward. See: Leather, S. 2002. Excellence in ecological entomology- the Royal Entomological Society's awards for scientific writing. Ecol. Entomol. 27:513.)
  
• Effects of the Protozoan Parasite Ophryocystis elektroscirrha on the Fitness of Monarch Butterflies (Danaus plexippus) - 1999
  Sonia M. Altizer and Karen S. Oberhauser
  
  Altizer, S.M. and K.S. Oberhauser. 1999. Effects of the protozoan parasite Ophryocystis elektroscirrha on monarch butterfly (Danaus plexippus) fitness. J. Inv. Pathol. 74:76-88.
  
• Interactions between monarch butterflies and the protozoan parasite, Ophryocystis elektroscirrha
  Sonia M. Altizer
  
  Department of Ecology, Evolution, and Behavior, University of Minnesota, St. Paul, MN
• The Effects and Importance of Predation on Immature Monarch Populations
  Alma De Anda
  
  University of Minnesota, Saint Paul, MN

Reproductive Biology

• Male monarch butterflies, Danaus plexippus, adjust ejaculates in response to intensity of sperm competition - 2009
  MIchelle Solensky and Karen Oberhauser
  
  Solensky, M.S. and K. S. Oberhauser. 2009. Male monarch butterflies (Danaus plexippus) adjust their ejaculates in response to risk and intensity of sperm competition. Animal Behavior 77:465-472.
  
• Sperm precedence in monarch butterflies (Danaus plexippus) - 2009
  Michelle J. Solensky and Karen S. Oberhauser
  
  Solensky, M.S. and K. S. Oberhauser. 2009. Sperm precedence in monarch butterflies (Danaus plexippus). Behavioral Ecology, doi: 10.1093/beheco/arp003
  
• Monarch sex: ancient rites, or recent wrongs? - 2007
  Lincoln P. Brower, Karen S. Oberhauser, Michael Boppré, Andrew V.Z. Brower and R.I. Vane-Wright
  
  Brower, L., K. Oberhauser, M. Boppré, A.V.Z. Brower, R.I. Vane-Wright. 2007. Monarch sex: Ancient rites, or recent wrongs? Antenna 31: 12-18.
  
• Overview of Monarch Breeding Biology - 2004
  Karen S. Oberhauser
  
  Oberhauser, K. 2004. Overview of Monarch Breeding Biology. Pp. 3-8. In Oberhauser, K.S. & M.J. Solensky, eds. The Monarch Butterfly: Biology and Conservation. Cornell University Press. Ithaca NY.
  
• Effects of Female Age, Female Mass, and Nutrients from Males on Monarch Egg Mass - 2004
  Karen S. Oberhauser
  
  Oberhauser, K.S. 2004. Effects of female age, female mass and nutrients from males on monarch egg mass. Pp. 21-26. In: Oberhauser, K.S. and M.J. Solensky, eds. The Monarch Butterfly: Biology and Conservation. Cornell University Press. Ithaca NY.
  
• Behavioral and Genetic Components of Male Mating Success in Monarchs - 2004
  Michelle J. Solensky and Karen S. Oberhauser
  
  Solensky, M. J. and K. S. Oberhauser. 2004. Behavioral and genetic components of male mating success in monarch butterflies. Pp. 61-68. In: Oberhauser, K.S. and M.J. Solensky, eds. The Monarch Butterfly: Biology and Conservation. Cornell University Press. Ithaca NY.
  
• Effects of photoperiod, temperature, and host plant age on induction of reproductive diapause and development time in Danaus plexippus - 2002
  Liz Goehring and Karen Oberhauser
  
  Goehring, L. & Oberhauser, K.S. 2002. Effects of photoperiod, temperature and host plant age on induction of reproductive diapause and development time in Danaus plexippus. Ecol. Entom. 27:674-685.
  
• Coercive mating by overwintering male monarch butterflies - 1999
  Karen Oberhauser and Dennis Frey
  
  Oberhauser, K.S. and D. Frey. 1999. Coerced mating in monarch butterflies. Proceedings of the North American conference on the Monarch Butterfly, pp.67-78. Hoth, J, I. Pisanty, K. Oberhauser, L. Merino and S. Price, editors. Commission for Environmental Cooperation: Montreal, QC.
  
• Environmental induction of reproductive diapause in Danaus plexippus - 1999
  Liz Goehring and Karen S. Oberhauser
  
  Goehring, L. and Oberhauser, K.S. 1999. Environmental induction of reproductive diapause in Danaus plexippus. Proceedings of the North American conference on the Monarch Butterfly, pp. 349-354. Hoth, J., I. Pisanty, K. Oberhauser, L. Merino and S. Price, editors. Commission for Environmental Cooperation: Montreal, QC.
  
• Mate paring patterns of monarch butterflies (Danaus plexippus L.) at a California overwintering site - 1998
  Dennis Frey, Kingston Leong, Eric Peffer, Robert K. Smidt, and Karen Oberhauser
  
  Frey, D., K.L.H. Leong, E. Peffer, R.K. Smidt, K.S. Oberhauser. 1998. Mating patterns of overwintering monarch butterflies (Danaus plexippus (L.)) in California. J. Lepid. Soc. 52: 84-97.
  
• Fecundity, Lifespan and Egg Mass in Butterflies: Effects of Male-Derived Nutrients and Female Size - 1997
  Karen S. Oberhauser
  
  Oberhauser, K. S. 1997. Fecundity and egg mass of monarch butterflies: effects of age, female size and mating history. Func. Ecol. 11(2): 166-175.
  
• The Relationship Between Mating and Oogenesis In Monarch Butterflies (Lepidoptera: Danainae) - 1995
  Karen S. Oberhauser and Rachel Hampton
  
  Oberhauser, K. S. and R. Hampton. 1995. Relationship between mating and oogenesis in monarch butterflies. J. Ins. Behav. 8:701-713.
  
• Rate of ejaculate breakdown and intermating intervals in monarch butterflies - 1992
  Karen S. Oberhauser
  
  Oberhauser, K. S. 1992. Rate of ejaculate breakdown and intermating intervals in monarch butterflies. Behav. Ecol. Sociobiol. 31:367-373.
  
• Effects of spermatophores on male and female monarch butterfly reproductive success - 1989
  Karen S. Oberhauser
  
  Oberhauser, K. S. 1989. Effects of spermatophores on male and female monarch butterfly reproductive success. Behav. Ecol. Sociobiol. 25:237-246.
  
• Lack of Rare-Male Mating Effect Using bw and st Drosophila melanogaster Mutants - 1988
  Karen S. Oberhauser
  
  Oberhauser, K. S. 1988. Lack of rare-male mating effect in bw and st Drosophila melanogaster mutants. Amer. Nat. 131:143-148.
  
• Male monarch butterfly spermatophore mass and mating strategies - 1988
  Karen S. Oberhauser
  
  Oberhauser, K. S. 1988. Male monarch butterfly spermatophore mass and mating strategies. Anim. Behav. 36:1384-1388.
  
• Factors that Affect Reproductive Success in Male and Female Monarchs
  Dr. Karen Oberhauser
  
  University of Minnesota, Saint Paul, MN

Conservation

• Bioenergy and Wildlife: Threats and Opportunities for Grassland Conservation - 2009
  Joseph E. Fargione, Thomas R. Cooper, David J. Flaspohler, Jason Hill, Clarence Lehman, Tim McCoy, Scott McLeod, Erik J. Nelson, Karen S. Oberhauser, and David Tilman
  
  Fargione, JE, TR Cooper, DJ Flaspohler, J Hill, C Lehman, T McCoy, S McLeod, EJ Nelson, KS Oberhauser, D Tilman. 2009. Bioenergy and wildlife: Threats and opportunities for grassland conservation. Bioscience 59:767-777.
  
• Impacts of ultra-low volume Resemethrin applications on non-target insects - 2009
  Karen S. Oberhauser, Stephen A. Manweiler, Rosemary Lelich, Meredith Blank, Rebecca A. Batalden, and Alma de Anda
  
  Oberhauser, K.S, S. Manweiler, R. Lelich, M. Blank, R. Batalden, A. De Anda. 2009. Impacts of ULV resmethrin applications on non-target insects. Journal of the American Mosquito Control Association 25:83–93.
  
• Citizen Science: Creating a Research Army for Conservation - 2008
  Karen S. Oberhauser and Michelle D. Prysby
  
  Oberhauser, K. S. and M. D. Prysby. 2008. Citizen Science: Creating a Research Army for Conservation. American Entomologist 54:97-99.
  
• Insects as flagship conservation species - 2008
  Margaret S. Guiney and Karen S. Oberhauser
  
  Guiney, M. S. and K. S. Oberhauser. 2008. Insects as Flagship Conservation Species. Terrestrial Arthropod Reviews. 1:111-123.
  
• Ecological Niches in Sequential Generations of Eastern North American Monarch Butterflies (Lepidoptera: Danaidae): The Ecology of Migration and Likely Climate Change Implications - 2007
  Rebecca V. Batalden, Karen S. Oberhauser, and A. Townsend Peterson
  
  Batalden, R., K.S. Oberhauser, A.T. Peterson. 2007. Ecological niches in breeding generations of Eastern North American monarch butterflies. Environmental Entomology. 36:1365-1373.
  
• Growth and Survival of Monarch Butterflies (Lepidoptera: Danaidae) After Exposure to Permethrin Barrier Treatments - 2006
  K. S. Oberhauser, S. J. Brinda, S. Weaver, R. D. Moon, S. A. Manweiler, and N. Read
  
  Oberhauser, K. S., S. J. Brinda, S. Weaver, R. D. Moon, S. A. Manweiler, N. Read. 2006. Growth and survival of monarch butterflies (Lepidoptera: Danaidae) after exposure to permethrin barrier treatments. Environ. Entomol. 35 (6): 1626-1634.
  
• Survival of Experimental Cohorts of Monarch Larvae following Exposure to Transgenic Bt Corn Pollen and Anthers - 2004
  Laura C. H. Jesse and John J. Obrycki
  
  Jesse, L.C.H. and J.J. Obrycki. 2004. Survival of Experimental Cohorts of Monarch Larvae following Exposure to Transgenic Bt Corn Pollen and Anthers. Pp. 69-75. In Oberhauser, K.S. & M.J. Solensky, eds. The Monarch Butterfly: Biology and Conservation. Cornell University Press. Ithaca NY.
  
• Monarch butterfly (Danaus plexippus) larvae and Bt maize pollen: a review of ecological risk assessment for a non-target species - 2003
  Karen Oberhauser and Erika Rivers
  
  Oberhauser, K.S. and E.R.L. Rivers. 2003. Monarch butterfly (Danaus plexippus) larvae & Bt corn pollen: A review of ecological risk assessment for a non-target species. AgBiotechNet. 5:1-7.
  
• Modeling current and future potential wintering distributions of eastern North American monarch butterflies - 2003
  Karen Oberhauser and A. Townsend Peterson
  
  Oberhauser, K.S. and T. Peterson. 2003. Modeling current and future potential wintering distributions of Eastern North American monarch butterflies. Proc. Nat. Acad. Sci. 100:14063-14068.
  
• Impact of Bt corn pollen on monarch butterfly populations: A risk assessment - 2001
  Mark K. Sears, Richard L. Hellmich, Diane E. Stanley-Horn, Karen S. Oberhauser, John M. Pleasants, Heather R. Mattila, Blair D. Siegfriedi, and Galen P. Dively
  
  Sears, M. K., R. L. Hellmich, D. E. Stanley-Horn, K. S. Oberhauser, J. M. Pleasants, H. R. Mattila, B. D. Siegfriedi, G. P. Dively. 2001. Impact of Bt corn pollen on monarch butterfly populations: A risk assessment. Proc. Nat. Acad. Sci. 98 (21): 11937-11942.
  
• Temporal and spatial overlap between monarch larvae and corn pollen - 2001
  Karen S. Oberhauser, Michelle D. Prysby, Heather R. Mattila, Diane E. Stanley-Horn, Mark K. Sears, Galen Dively, Eric Olson, John M. Pleasants, Wai-Ki F. Lami, and Richard L. Hellmich
  
  Oberhauser, K.S., Prysby, M.D., Mattila, H.R., Stanley-Horn, D.E., Sears, M.K., Dively, G., Olson, E., Pleasants, J.M., Lam. W.F. & Hellmich, R. 2001. Temporal and spatial overlap between monarch larvae and corn pollen. Proc. Nat. Acad. Sci. 98 (21): 11913-11918.
  
• Monarch Transfer: A Real Concern? - 1996
  J. B. Keiper; Lincoln P. Brower; Linda S. Fink; Andrew van Zandt Brower; Kingston Leong; Karen Oberhauser; Sonia Altizer; Orley Taylor; Danel Vickerman; William H. Calvert; Tonya van Hook; Alfonso Alonso- Mejia; Stephen B. Malcolm; Denis F. Owen; Myron P. Zalucki
  
  Brower, L. P, L. Fink, A. V. Z. Brower, K. Leong, K. Oberhauser, S. Altizer, O. Taylor, D. Vickerman, W. Calvert, T. Van Hook, A. Alonso, S. Malcolm, D. Owen, M. Zalucki. 1996. Reply to J. B. Keiper: Monarch transfer: a real concern? Bioscience 46:563-564.
  
• On the Dangers of Interpopulational Transfers of Monarch Butterflies - 1995
  Lincoln P. Brower; Linda S. Fink; Andrew van Zandt Brower; Kingston Leong; Karen Oberhauser; Sonia Altizer; Orley Taylor; Danel Vickerman; William H. Calvert; Tonya van Hook; Alfonso Alonso-Mejia; Stephen B. Malcolm; Denis F. Owen; Myron P. Zalucki
  
  Brower, L. P, L. Fink, A. V. Z. Brower, K. Leong, K. Oberhauser, S. Altizer, O. Taylor, D. Vickerman, W. Calvert, T. Van Hook, A. Alonso, S. Malcolm, D. Owen, M. Zalucki. 1995. On the dangers of interpopulational transfers of monarch butterflies. Bioscience. 45:540-544.
  
• DiPel’s Effect on Monarch Larvae
  Katharine Plowman
  
  University of Minnesota, Saint Paul, MN
• Direct Payments for Conservation: Lessons from the Monarch Butterfly Conservation Fund
  Mónica Missrie and Kristen Nelson
  
  University of Minnesota, Saint Paul, MN

Migration

• Monarch butterfly migration and parasite transmission in eastern North America - 2011
  Rebecca A. Bartel, Karen S. Oberhauser, Jacobus De Roode, and Sonia M. Altizer
  
  Bartel, RE, KS Oberhauser, JC De Roode, SM Altizer. 2011. Monarch migration, seasonal habitat use and parasite transmission in eastern North America. Ecology 92(2): 342-351.
  
• Phototactic Behaviors of Monarchs - 2004
  Alexandra Wilson
  
  University of Minnesota, Saint Paul, MN
• Overview of Monarch Overwintering Biology - 2004
  Michelle Solensky
  
  Solensky, M. 2004. Overview of Monarch Overwintering Biology. Pp. 117-127. In Oberhauser, K.S. & M.J. Solensky, eds. The Monarch Butterfly: Biology and Conservation. Cornell University Press. Ithaca NY.
  
• Overview of Monarch Migration - 2004
  Michelle Solensky
  
  Solensky, M. 2004. Overview of Monarch Migration. Pp. 79-83. In Oberhauser, K.S. & M.J. Solensky, eds. The Monarch Butterfly: Biology and Conservation. Cornell University Press. Ithaca NY.
  
• Characteristics of Fall Migratory Monarch Butterflies, Danaus plexippus, in Minnesota and Texas - 2004
  Borland, J., C. Johnson, T. Crumpton, T. Thomas, S. Altizer, K. Oberhauser
  
  Borland, J., C. Johnson, T. Crumpton, T. Thomas, S. Altizer, K. Oberhauser. 2004. Characteristics of fall migratory monarch butterflies, Danaus plexippus, in Minnesota and Texas. Pp. 97-104. In Oberhauser, K.S. & M.J. Solensky, eds. The Monarch Butterfly: Biology and Conservation. Cornell University Press. Ithaca NY.
  
• Mate paring patterns of monarch butterflies (Danaus plexippus L.) at a California overwintering site - 1998
  Dennis Frey, Kingston Leong, Eric Peffer, Robert K. Smidt, and Karen Oberhauser
  
  Frey, D., K.L.H. Leong, E. Peffer, R.K. Smidt, K.S. Oberhauser. 1998. Mating patterns of overwintering monarch butterflies (Danaus plexippus (L.)) in California. J. Lepid. Soc. 52: 84-97.
  

Population Dynamics

• Ecological Niches in Sequential Generations of Eastern North American Monarch Butterflies (Lepidoptera: Danaidae): The Ecology of Migration and Likely Climate Change Implications - 2007
  Rebecca V. Batalden, Karen S. Oberhauser, and A. Townsend Peterson
  
  Batalden, R., K.S. Oberhauser, A.T. Peterson. 2007. Ecological niches in breeding generations of Eastern North American monarch butterflies. Environmental Entomology. 36:1365-1373.
  
• North American Monarch Butterfly Monitoring Programs - 2007
  Karen Oberhauser
  
  Oberhauser, K. S. 2007. Programma norteamericano de monitero de la mariposa Monarca. Pp 33-58 in Pisanty, I. and M. Caso. Especies, espacios y riegos: Monitoreo para la conservación de la biodiversidad. Instituto Nacional de Ecoligia (INE-SEMARNAT). Mexico DF.
  
• Spatial and Temporal Population Dynamics of Monarchs Down- Under: Lessons for North America - 2004
  Myron P. Zalucki and Wayne A. Rochester
  
  Zalucki, M. and W. Rochester. 2004. Spatial and Temporal Population Dynamics of Monarchs Down-Under: Lessons for North America. Pp. 219-228. In Oberhauser, K.S. & M.J. Solensky, eds. The Monarch Butterfly: Biology and Conservation. Cornell University Press. Ithaca NY.
  
• Modeling the Distribution and Abundance of Monarch Butterflies - 2004
  Karen S. Oberhauser
  
  Oberhauser. K. 2004. Modeling the Distribution and Abundance of Monarch Butterflies. Pp. 199-202. In Oberhauser, K.S. & M.J. Solensky, eds. The Monarch Butterfly: Biology and Conservation. Cornell University Press. Ithaca NY.
  
• Temporal and Geographic Variation in Monarch Densities: Citizen Scientists Document Monarch Population Patterns - 2004
  Michelle D. Prysby and Karen S. Oberhauser
  
  Prysby, M. and K. Oberhauser. 2004. Temporal and Geographic Variation in Monarch Densities: Citizen Scientists Document Monarch Population Patterns. Pp. 9-20. In Oberhauser, K.S. & M.J. Solensky, eds. The Monarch Butterfly: Biology and Conservation. Cornell University Press. Ithaca NY.
  
• Population Structure of the Endangered Mitchell’s Satyr, Neonympha mitchellii mitchellii (French): Implications for Conservation - 2004
  Jennifer Szymanski, John Shuey, and Karen Oberhauser
  
  Szymanski, J., J.A. Shuey, K. Oberhauser. 2004. Population structure of the endangered Mitchell’s Satyr, Neonympha mitchellii mitchellii (French). Amer. Midl. Nat. 152(2):304-322.
  
• Large-scale monitoring of larval monarch populations and milkweed habitat in North America - 1999
  Michelle D. Prysby and Karen S. Oberhauser
  
  Prysby, M. and K. Oberhauser. 1999. Large scale monitoring of monarch populations. Proceedings of the North American conference on the Monarch Butterfly, pp. 379-384. Hoth, J, I. Pisanty, K. Oberhauser, L. Merino and S. Price, editors. Commission for Environmental Cooperation: Montreal, QC.
  
• Ecological Niches in Sequential Generations of Monarch Butterflies and Projections in Future Climatic Conditions
  Rebecca Batalden, Karen Oberhauser, A. Townsend Peterson
  
  University of Minnesota, Saint Paul, MN

Human Impact

• Conservation Volunteers’ Connection to Nature - 2009
  Margaret Savanick Guiney and Karen S. Oberhauser
  
  Guiney, M. S. and K. S. Oberhauser. 2009. Conservation volunteers’ connection to nature. Ecopsychology special issue: Emotional Well-being and Sustainable Behaviors. 1:187-198.
  
• Impacts of ultra-low volume Resemethrin applications on non-target insects - 2009
  Karen S. Oberhauser, Stephen A. Manweiler, Rosemary Lelich, Meredith Blank, Rebecca A. Batalden, and Alma de Anda
  
  Oberhauser, K.S, S. Manweiler, R. Lelich, M. Blank, R. Batalden, A. De Anda. 2009. Impacts of ULV resmethrin applications on non-target insects. Journal of the American Mosquito Control Association 25:83–93.
  
• Citizen Science: Creating a Research Army for Conservation - 2008
  Karen S. Oberhauser and Michelle D. Prysby
  
  Oberhauser, K. S. and M. D. Prysby. 2008. Citizen Science: Creating a Research Army for Conservation. American Entomologist 54:97-99.
  
• Growth and Survival of Monarch Butterflies (Lepidoptera: Danaidae) After Exposure to Permethrin Barrier Treatments - 2006
  K. S. Oberhauser, S. J. Brinda, S. Weaver, R. D. Moon, S. A. Manweiler, and N. Read
  
  Oberhauser, K. S., S. J. Brinda, S. Weaver, R. D. Moon, S. A. Manweiler, N. Read. 2006. Growth and survival of monarch butterflies (Lepidoptera: Danaidae) after exposure to permethrin barrier treatments. Environ. Entomol. 35 (6): 1626-1634.
  
• Impact of Bt corn pollen on monarch butterfly populations: A risk assessment - 2001
  Mark K. Sears, Richard L. Hellmich, Diane E. Stanley-Horn, Karen S. Oberhauser, John M. Pleasants, Heather R. Mattila, Blair D. Siegfriedi, and Galen P. Dively
  
  Sears, M. K., R. L. Hellmich, D. E. Stanley-Horn, K. S. Oberhauser, J. M. Pleasants, H. R. Mattila, B. D. Siegfriedi, G. P. Dively. 2001. Impact of Bt corn pollen on monarch butterfly populations: A risk assessment. Proc. Nat. Acad. Sci. 98 (21): 11937-11942.
  
• Temporal and spatial overlap between monarch larvae and corn pollen - 2001
  Karen S. Oberhauser, Michelle D. Prysby, Heather R. Mattila, Diane E. Stanley-Horn, Mark K. Sears, Galen Dively, Eric Olson, John M. Pleasants, Wai-Ki F. Lami, and Richard L. Hellmich
  
  Oberhauser, K.S., Prysby, M.D., Mattila, H.R., Stanley-Horn, D.E., Sears, M.K., Dively, G., Olson, E., Pleasants, J.M., Lam. W.F. & Hellmich, R. 2001. Temporal and spatial overlap between monarch larvae and corn pollen. Proc. Nat. Acad. Sci. 98 (21): 11913-11918.
  

Overwintering

• Catastrophic Winter Storm Mortality of Monarch Butterflies in Mexico during January 2002 - 2004
  Lincoln P. Brower, David R. Kust, Eduardo Rendón Salinas, Eligio García-Serrano, Katherine R. Kust, Jacob Miller, Concha Fernandez del Rey, and Karen Pape
  
  Brower, L. P., D.R. Kust, E. R. Salinas, E. Garcia-Serrano, K. R. Kust, J. Miller, C. F. del Rey, and K. Pape. 2004. Catastrophic Winter Storm Mortality of Monarch Butterflies in Mexico during January 2002. Pp. 151-166. In Oberhauser, K.S. & M.J. Solensky, eds. The Monarch Butterfly: Biology and Conservation. Cornell University Press. Ithaca NY.
  
• Environmental Factors Influencing Postdiapause Reproductive Development in Monarch Butterflies - 2004
  Liz Goehring and Karen S. Oberhauser
  
  Goehring, L. & Oberhauser, K.S. 2004. Environmental factors influencing postdiapause reproductive development in monarch butterflies. Pp. 187-198. In: Oberhauser, K.S. and M.J. Solensky, eds. The Monarch Butterfly: Biology and Conservation. Cornell University Press. Ithaca NY.
  
• Modeling current and future potential wintering distributions of eastern North American monarch butterflies - 2003
  Karen Oberhauser and A. Townsend Peterson
  
  Oberhauser, K.S. and T. Peterson. 2003. Modeling current and future potential wintering distributions of Eastern North American monarch butterflies. Proc. Nat. Acad. Sci. 100:14063-14068.
  

Outreach

• Citizen Science and Youth Audiences: Educational Outcomes of the Monarch Larva Monitoring Project - 2008
  Dina Kountoupes and Karen Oberhauser
  
  Kountoupes, D., and K. S. Oberhauser. 2008. Citizen science and youth audiences: Educational outcomes of the Monarch Larva Monitoring Project. Journal of Community Engagement and Scholarship. 1:10-20.
  
• Schoolyards, Science and Sustainability: Curriculum, Garden Grants and Summer Workshops - 2007
  Lis Young-Isebrand, Karen Oberhauser, Robert Blair and Susan Barrott
  
  Young-Isebrand, L., K. Oberhauser, R. Blair, S. Barrott. 2007. Schoolyards, Science and Sustainability: Curriculum, Garden Grants and Summer Workshops. Proceedings: NAAEE 2006 Conference. www.naaee.org.
  
• Characteristics of Professional Development That Effect Change in Secondary Science Teachers’ Classroom Practices - 2005
  Bobby Jeanpierre, Karen Oberhauser, Carol Freeman
  
  Jeanpierre, B., K. Oberhauser, C. Freeman. 2005. Change in secondary science teachers’ classroom practices: A professional development model that works. J. Res. Sci. Teaching. 42(6):668-690.
  
• Monarchs in the Classroom: A K-12 ecology education program - 1999
  Karen Oberhauser and Liz Goehring
  
  Oberhauser, K.S. and L. Goehring. 1999. Monarchs in the classroom, a K-12 ecology education program. Proceedings of the North American conference on the Monarch Butterfly, pp. 349-354. Hoth, J., I. Pisanty, K. Oberhauser, L. Merino and S. Price, editors. Commission for Environmental Cooperation: Montreal, QC.
  

General Issues

• Monarch butterfly monitoring in North America: Overview of initiatives and protocols - 2009
  Karen Oberhauser, Rebecca Batalden, and Elizabeth Howard
  
  Oberhauser, K. S., R. Batalden, and E. Howard. 2009. Monarch monitoring in North America: Overview of initiatives and protocols. Commission on Environmental Cooperation. Montreal, Canada.
  
• 2001 Monarch Population Dynamics Meeting: Meeting and Working Group Summaries - 2002
  Karen Oberhauser and Michelle Solensky
  
  Oberhauser, K.S. and M.J. Solensky. 2002. 2001 Monarch Population Dynamics Meeting: Meeting and Working Group Summaries.
  

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