EDUCATION

Doctor of Philosophy, Zoology, Miami University, August 2001

Title of Dissertation: The evolution of sexual dimorphism in wolf spiders

(Araneae:Lycosidae)

Advisor: Dr. Ann L. Rypstra

Master of Science, Zoology, Miami University, August, 1996

Title of Thesis: Characterization of the lethal and sub-lethal effects of Fluoranthene on Bullfrog larvae, (Rana catesbeiana)

Advisor: Dr. Douglas H. Taylor

Bachelor of Science, Chemistry, University of Texas at Tyler, May 1994

Tyler Junior College, September 1990- May 1992

RESEARCH INTERESTS

Population, Evolutionary, and Behavioral Ecology, Statistics

PROFESSIONAL EXPERIENCE

August 2003- present- Assistant Professor, Department of Biological Science, California State University, Fullerton

January-May 2003- Sessional lecturer, Department of Psychology and Neuroscience, University of Lethbridge, Lethbridge, Alberta, Canada.

2001-2003 Post-doctoral fellow, Department of Biological Sciences, University of Lethbridge, Lethbridge, Alberta, Canada.

I was responsible for the day to day operations of the laboratory and co-supervise undergraduate research projects with Dr. Cade. In addition, I am developing models of mating behavior in field crickets to determine the fitness costs and benefits of different male strategies (e.g., calling versus satellite behavior) and conducting experiments in the laboratory and field to examine the how sexual and natural selection influence cricket mating behavior.

1994-2001 Graduate Assistant/Graduate Associate, Department of Zoology Miami University, Oxford, Ohio. Specific duties varied over time but include the following:

Full teaching responsibilities for Environmental Biology, a 4-credit non-majors, lecture/discussion class with approximately 40 students.

Laboratory teaching responsibility for Introductory Biology, Vertebrate Zoology, Herpetology, Ornithology, and Animal Behavior.

Coordinator for Ohio Spider Web Project - a locally based project aimed to enhance communication and collaboration among the arachnologists in the state of Ohio and neighboring regions.

Research assistant in the laboratory of Dr. A.L. Rypstra. This involved participation in a range of laboratory and field experiments as well as data analysis, some of which were related to my dissertation and others related to an on-going research program on spider landscape ecology. Coordinated laboratory activities including ordering essential lab supplies, helping undergraduates with independent projects and ensuring that laboratory colonies of spiders and insects were cared for.

1992-1994 Undergraduate Research Assistant, Department of Biology, University of Texas as Tyler. Assisted with laboratory and field experiments and helped maintain the Ophidian Research Colony.

1990-1994 Undergraduate Teaching Assistant in Chemistry, University of Texas at Tyler and Tyler Junior College. Assisted in laboratory sections of General Chemistry, Organic Chemistry, Analytical Chemistry, Instrument Analysis and Chemistry and Society.

Various- Guest Lecturer Miami University, Hamilton, Ohio and University of Lethbridge, Lethbridge, Alberta.

Presented guest lectures for courses in Animal Diversity, Animal Behavior, Evolution, Sociobiology, and Invertebrate Zoology

COURSES TAUGHT

Biology 101 (California State University, Fullerton) Elements of Biology

Biology 171 & 171L (California State University, Fullerton) Evolution and Biodiversity

Biology 171W (California State University, Fullerton) Evolution and Biodiversity Workshop

Biology 301 (California State University, Fullerton) Problems in Environmental Biology (co-taught with Dr. Bill Hoese & other SCERP mentors)

Biology 314 (California State University, Fullerton) Evolutionary Ecology

Biology/Mathematics 436 (California State University, Fullerton) Advanced Applied Statistics

Biology 467 (California State University, Fullerton) Entomology

Biology 481T (California State University, Fullerton) Sexual Selection, Behavior, and Mate Choice

Biology 571T (California State University, Fullerton) Phylogeny, Ecology, and Behavior

Biology 517T (California State University, Fullerton) Design and Analysis of Ecological Experiments

Biology 465 (California State University, Fullerton) Integrative Biology of Spider Silk (co-taught with Dr. Merri Lynn Casem).

Psychology 2700 (University of Lethbridge; Alberta, Canada)- Introduction to Animal Behavior

Biology 4850 (University of Lethbridge; Alberta, Canada)- Special Topics Course on Insect Mating Behaviour

Zoology 121 (Miami University; Oxford, Ohio) Environmental Biology

GRANTS & CONTRACTS

Examining the Evolution of Sexual Dimorphism in a Model System. Ohio Board of Regents; Research Challenge Grant funded 1998-1999 - $ 9,968 (S.E. Walker & Ann L. Rypstra).

An Experimental Test for Adaptive Plasticity in Clutch Size and Offspring Size in the Vagrant Hunting Spider, Hogna helluo (Araneae, Lycosidae) American Arachnological Society Fund funded 1994-1995 - $ 500 (S. E. Walker & R. A. Balfour)

Cognitive Ecology of Mate Choice in a Model System. Untenured faculty development program grant, Faculty Development Center, California State University, Fullerton funded 2003-2004- $7250.00.

Image-based assessments of student understanding in biology. Faculty Enhancement and instructional development grant, Faculty Development Center, California State University, Fullerton funded 2004-2005- $499.00 (W. J. Hoese & S. E. Walker).

San Fernando Valley Spineflower Pollination Biology. The Newhall Land and Farming Company funded 2004-2005- $77, 481.25 (P.I. C. Eugene Jones, Co-P.I.’s S. E. Walker and D. Sandquist).

Self versus mutual evaluation in cricket fights: When to throw in the towel? Untenured faculty development program grant, Faculty Development Center, California State University, Fullerton funded 2004-2005- $7,250.00.

Talking about alternative strategies: Funds to attend the Annual Conference of the Entomological Society of America. Faculty Research Travel Grant. Faculty Development Center, California State University, Fullerton funded $745.00 .

Biodiveristy of Sky Islands: Examining elevational gradients of Moth diversity in Southwestern Arizona. Untenured faculty development program grant, Faculty Development Center, California State University, Fullerton funded 2005-2006- $389.00

Undergraduate Field Experiences in Biology. Associated Students, CSUF, Inc. Instructionally Related Activities. Funded 2006-2007 $20,653 (P. Stapp, W. J. Hoese, & S. E. Walker)

Assessment of quantitative skills in undergraduate biology students. Faculty Enhancement and instructional development grant, Faculty Development Center, California State University, Funded 2006-2007 $500.00 (S.E. Walker & W. J. Hoese).

Behavioral Syndromes and Aggression: Developing a New Model System. CSU special Fund for Research, Scholarship and Creative Activity, Funded 2006-2007 $4,500.

PUBLICATIONS

1. Walker, S.E. & N.B. Ford. 1996. Courtship Behavior in the African Colubrid snake, Lamprophis fulginosis. Journal of Herpetology. 30:416-418.

2. Walker, S.E., D.H. Taylor & J.T. Oris. 1998. Behavioral and histopathological effects of fluoranthene on bullfrog larvae (Rana catesbeianna), Environmental Toxicology and Chemistry:17:734-739.

3. Rice, T.M., S.E. Walker, B.J. Blackstone & D.H. Taylor. 1998. A new method for marking individual anuran larvae. Herpetological Review 29:92-93

4. Walker, S.E., S.D. Marshall & A.L. Rypstra. 1999. The effects of feeding history on locomotor behaviour in two species of wolf spider. Animal Behaviour 58:515-520.

5. Walker, S.E., S.D. Marshall & A.L. Rypstra. 1999. The effect of feeding history on retreat construction in the wolf spider Hogna helluo (Walckenaer). Journal of Arachnology 27:689-691.

6. Bailer, A.J., S.E. Walker, & K.J. Venis. 2000. Estimating and testing bioconcentration factors. Environmental Toxicology and Chemistry 19:2338-2340.

7. Marshall, S.D., A.L. Rypstra & S.E. Walker. 2000. A test for differential colonization and competitive ability in two generalist predators. Ecology 81:3341-3349.

8. Persons, M.H., S.E. Walker, A.L. Rypstra & S.D. Marshall. 2001. Wolf spider predator avoidance tactics and survival in the presence of diet-associated predator cues (Araneae:Lycosidae). Animal Behaviour 61:43-51.

9. Brueseke, M. A., A. L. Rypstra, S. E. Walker, and M. H. Persons. 2001. Leg autotomy in the wolf spider Pardosa milvina (Hentz)(Araneae: Lycosidae): a common phenomenon with few apparent costs. American Midland Naturalist 146 : 153-160.

10. Walker, S.E. & A.L. Rypstra. 2001. Sexual dimorphism in functional response and trophic morphology in Rabidosa rabida (Araneae: Lycosidae). American Midland Naturalist 146:161-170.

11. M. H. Persons, S. E. Walker & A.L. Rypstra. 2002. Fitness costs and benefits of chemically-mediated anti-predator behavior in the wolf spider Pardosa milvina (Araneae: Lycosidae). Behavioral Ecology 13:386-392

12. Walker, S.E. & A.L. Rypstra. 2002. Sexual dimorphism in feeding behavior and trophic morphology in wolf spiders (Araneae: Lycosidae). Canadian Journal of Zoology 80:679-688.

13. Walker, S.E., A.L. Rypstra, & S.D. Marshall. 2003. The relationship between offspring size and performance in the wolf spider Hogna helluo (Araneae:Lycosidae). Evolutionary Ecology Research 5:19-28.

14. Walker, S. E. & A. L. Rypstra. 2003. Sexual dimorphism and the differential mortality model: Is behaviour related to survival ? Biological Journal of the Linnean Society 78:97-103.

15. Balfour, R. A., C. M. Buddle, A. L. Rypstra, S. E. Walker &S. D. Marshall. 2003. Ontogenetic shifts in competitive interactions and intraguild predation between two wolf spider species. Ecological Entomology 28:25-30.

16. Rypstra, A. L., C. Weig, S. E. Walker, and M. H. Persons. 2003. Mutual mate assessment in wolf spiders: Differences in the cues used my males and females. Ethology 109:315-325.

17. Buddle, C. M., S. E. Walker, & A. L. Rypstra. 2003. Cannibalism regulates densities of the wolf spider Pardosa milvina. Canadian Journal of Zoology 81:1293-1297.

18. Walker, S. E. and W. H. Cade. 2003. A simulation model of the effects of frequency dependence, density dependence, and parasitoid flies on the fitness of male field crickets. Ecological Modelling 169:119-130.

19. Walker, S. E. and W. H. Cade. 2003. The effects of temperature on calling song in a field cricket with a complex calling song, Teleogryllus oceanicus (Orthoptera: Gryllidae). Canadian Journal of Zoology 81:1414-1420.

20. Walker, S. E. & A. L. Rypstra. 2003. Hungry spiders aren’t afraid of the big bad wolf spider. Journal of Arachnology 31:425-427.

21. Lehmann, L., S. E. Walker, & M. H. Persons. 2004. The influence of predator sex on chemically-mediated antipredator response in the wolf spider Pardosa milvina (Araneae: Lycosidae). Ethology 110:323-339.

22. S. E. Walker. 2006. Categorical data analysis and artificial nests: what exactly is a log-linear model? Oikos 114:191-192.

23. Marshall, S. D., S. E. Walker, and A. L. Rypstra. 2006. Matrix sensitivity shapes the response of two ecologically-divergent generalist predators to landscape pattern. Oikos114:241-248.

24. Walker, S. E. & J. T. Irwin. 2006. Sexual Dimorphism in the metabolic rate of two species of wolf spider (Araneae: Lycosidae). Journal of Arachnology 34:368-373.

25. Gray, D. W., C. Banuelos, S. E. Walker, W.H. Cade, & M. Zuck. 2007. Behavioural specialization among populations of the acoustically orienting parasitoid fly Ormia ochracea utilizing different cricket species as hosts. Animal Behavior. 73:99-104.

26. Buena, L. J. and S. E. Walker. 2008. Information asymmetry and aggressive behaviour in male house crickets, Acheta domesticus. Animal Behaviour 75:199-204.

27. Lloyd, D.C., D. C. Zacherl, S. E. Walker, G. Paradis, M. Sheehy, & R. Warner. 2008. Natal site affects elemental signatures in Kelletia kelletii larval statoliths. Marine Ecology Progress Series 353: 115-130.

28. Walker, S. E., J. A. Roberts, I. Adame, C. J. Collins, and D. Lim. 2008. Heads up: Sexual dimorphism in house crickets. Canadian Journal of Zoology 86:253-259.

29. Houtman, A. M. & S. E. Walker. Decreasing plagiarism: What works and what doesn’t. In Press, The Journal on Excellence in College Teaching.

30. Moradian, N. R. and S. E. Walker. Relationships between body size and sound producing structures in crickets: Do big males have big harps. In Press, Invertebrate Biology.

Manuscripts in Revision or Preparation

Hoese, W. J. & S. E. Walker. Using image-based assessments to identify misconceptions of insect diversity in college students.

Walker, S. E., M. H. Persons, and A. L. Rypstra. Predation risk and correlational selection: interactions between predation risk, asymmetry and signaling in the wolf spider Pardosa milvina (Araneae: Lycosidae).

Walker, S. E. & A. L. Rypstra. Morphometric evidence for fecundity selection in wolf spiders (Araneae: Lycosidae).

Walker, S. E. & A. L. Rypstra. Can differential mortality result in dwarf males?

Walker, S. E. & A. L. Rypstra. A comparative analysis of body size and sexual dimorphism in Wolf Spiders (Araneae:Lycosidae).

Jones, C.E., Shropshire, F.M., L.L. Taylor-Taft, Y.C. Atallah, R.L. Allen, S.E. Walker, L. C. Song, Jr, & J.H. Burk. Reproductive Biology of the San Fernando Valley Spineflower, Chorizanthe parryi var. Fernandina (Polygonaceae).

Technical Reports

C.E. Jones, D. R. Sandquist, F. M. Shropshier, L. C. Song, Jr., R. L. Allen, & S. E. Walker. 2004. Weed’s Intermediate Mariposa Lily, Calochortus weedii A.W. Wood var. intermedius F.M. Ownbey: Part I. Effect of Bulb Planting Orientation on Growth & Part II. Investigation of Seed Germination Conditions & Possible Cues. Prepared for the Irvine Corporation through a subcontract with LSA. 34 pages and one appendix.

Jones, C. E. S. E. Walker, F. M. Shropshire, R. L. Allen, D. R. Sandquist, & J. C. Luttrell. 2004. Newhall Ranch investigation of the San Fernando Valley Spineflower, Chorizanther parryi S.Watson var. Fernandina (S.Watson) Jepson. Prepared for the Newhall Ranch and Farming Company, Valencia, California in consultation with Dudek and Associates, Inc. Encinitas, California. 37 pages and one appendix.

C.E. Jones, D. R. Sandquist, F. M. Shropshier, R. L. Allen, & S. E. Walker. 2006. Weed’s Intermediate Mariposa Lily, Calochortus weedii A.W. Wood var. intermedius F.M. Ownbey: Year Two Report. . Prepared for the Irvine Corporation through a subcontract with LSA. 60 pages.

Papers in the CSUF Undergraduate Research Journal Dimensions (not peer reviewed):

Buena, L.J. 2006. The effect of female cricket chemical cues on the aggressive behavior of male crickets, Acheta domesticus. Dimensions: The journal of undergraduate research in Natural Sciences and Mathematics, California State University, Fullerton. VIII: 19-24.

Published Abstracts (not peer reviewed)

Walker, S.E., S. D. Marshall, A. L. Rypstra & D.H. Taylor. 1995. The effect of feeding levels on locomotor activity in Hogna helluo. American Arachnology 52:10.

Walker, S.E., R.A. Balfour, S.D. Marshall & A.L. Rypstra. 1996. Relationships between body size, clutch size and offspring size in two species of lycosids. American Arachnology 54:13.

Marshall, S.D., A.L. Rypstra & S.E. Walker. 1997. Relative dispersal abilities affect spider establishment in high quality habitat islands. American Arachnology 56:6.

Walker, S.E. & A.L. Rypstra. 1997. The influence of short-term foraging success on site investment in the wolf spider, Hogna helluo. American Arachnology 56:8.

Balfour, R., S.E. Walker & A.L. Rypstra. 1999. Cannibalism as a factor regulating population density in the wolf spider Pardosa milvina (Araneae, Lycosidae). American Arachnology 60:3.

Walker, S.E. & A.L. Rypstra. 1999. Morphometric analysis of sexual dimorphism in wolf spiders. American Arachnology 60:9.

Walker, S.E. & A.L. Rypstra. 1999. Sex differences in chelicerae and fang size, venom glands, and feeding behavior in Hogna helluo and Pardosa milvina. American Arachnology 60:9.

Persons, M., S. Walker, & A. Rypstra. 2001. Fitness costs and benefits of chemically-mediated antipredator behavior in the wolf spider Pardosa milvina (Araneae:Lycosidae). American Arachnology 62:10

Rypstra, A., S. Walker, M Persons, R. Balfour, & S. Marshall 2001. Competition as a result of anti-predator behavior in two species of wolf spiders (Araneae: Lycosidae). American Arachnology 62:11

Walker, S. , M. Persons, & A. Rypstra. 2001. The influence of predation risk on mate choice and courtship behavior in the wolf spider, Pardosa milvina. American Arachnology 62:13

Walker, S. & A. Rypstra. 2001. A comparative analysis of sexual dimorphism and body size in wolf spiders (Araneae: Lycosidae). American Arachnology 62:13.

Sisson, R. A., N.M. Moradian, E. Cole, & S. E. Walker. 2004. Male morphology and calling song characteristics in the field cricket, Gryllus bimaculatus. Bulletin of the California Academy of Sciences 103: Supplement p. 43.

Hoese, W. J. & S. E. Walker. 2004. Assessing college students understanding of insect diversity. Integrative and Comparative Biology 44:569.

Walker, S.E. & J. A. Roberts. 2005. Transitivity and song preferences in the house cricket, Acheta domesticus. Bulletin of the Southern California Academy of Sciences 104: Supplement p. 26.

Buena, L.J. & S.E. Walker. 2005. The effect of female chemical cues on the aggressive behavior of male crickets, Acheta domesticus. Bulletin of the Southern California Academy of Sciences 104: Supplement p. 31.

Buena, L.J. & S.E. Walker. 2006. The effect of female chemical cues on the aggressive behavior of male crickets, Acheta domesticus. Bulletin of the Southern California Academy of Sciences 105: Supplement p. 47.

Del Rio Cortes, G. & S.E. Walker. 2006. Sex differences and geographic variation in body size in the wolf spiders Rabidosa rabida and Rabidosa punctulata (Araneae: Lycosidae). Bulletin of the Southern California Academy of Sciences 105: Supplement p. 48.

Moradian, N.R. & S.E. Walker. 2006. Relationships between body size and sound producing structures in crickets: Do big males have big harps? Bulletin of the Southern California Academy of Sciences 105: Supplement pp. 44 -55.

Miscellaneous (not peer reviewed)

Rypstra, A.L. & S.E. Walker. 1998. The Ohio Spider Web Meetings. The

Newsletter of the American Arachnological Society 57:11.

INVITED PRESENTATIONS

2006

Noisy crickets that stink: Mate choice, aggression and alien invaders. Department of Zoology, Miami University, Oxford, Ohio, USA.

2004

Sex and death: Tales of spiders, crickets, and flies. Department of Biology, San Diego State University, San Diego, California, USA.

2003

Sex and death: Tales of spiders, crickets, and flies. Department of Biological Sciences, California State University at Fullerton, Fullerton, California, USA.

Who’s afraid of the big bad wolf spider. Department of Biological Sciences,University of Calgary, Calgary, Alberta, Canada

2002

The evolution of sexual dimorphism in wolf spiders. Department of Biology, College of Wooster, Wooster, Ohio, USA.

The evolution of sexual dimorphism in spiders. Department of Biological Sciences, University of Lethbridge, Lethbridge, Alberta, Canada.

2001

The evolution of sexual dimorphism in wolf spiders. Department of Biology,

Albion College. Albion, Michigan, USA.

Sexual selection and predation risk in wolf spiders (Araneae: Lycosidae). Department of Biological Sciences. University of Lethbridge, Lethbridge , Alberta, Canada.

Mortality, sexual dimorphism and sex: perspectives from spiders and crickets. Department of Biological Sciences. University of Cincinnati. Cincinnati, Ohio, USA.

1999

The evolution of sexual dimorphism in wolf spiders. The University of Texas at Tyler. Tyler, Texas, USA.

A comparative analysis of sexual dimorphism in wolf spiders. Entomological Society of America Meeting, Section A Symposium: The Intersection of Phylogenetics, Behavior, and Life History Evolution. Atlanta, Georgia.

CONTRIBUTED PRESENTATIONS

2007

Buena, L. J. & S. E. Walker. Male cricket aggression and predation risk: Male crickets fighting over spider silk. Annual meeting of the Southern California Academy of Sciences.

Collins, C. J., I. Adame, D. Lim, & S. E. Walker. Aggression and big heads: Sexual dimorphism in house crickets (Acheta domesticus). Annual meeting of the Southern California Academy of Sciences.

Francois, C. & S. E. Walker. Moth diversity along an elevational gradient in southeast Arizona. Annual meeting of the Southern California Academy of Sciences.

Peralta, E. S. & S. E. Walker. The effects of an invasive plant species, Vinca major on Arthropod communities in riparian habitat at Starr Ranch Audubon Sanctuary, California. Annual meeting of the Southern California Academy of Sciences.

2006

Walker, S.E. & W.H. Cade. Examining the relationship between time-spent calling, calling song structure, and mating success in the cricket, Teleogryllus oceanicus. 43^rd Annual meeting of the Animal Behavior Society.

Buena, L.J. & S.E. Walker. The effect of female chemical cues on the aggressive behavior of male crickets, Acheta domesticus. Annual meeting of the Southern California Academy of Sciences.

Del Rio Cortes, G. & S.E. Walker. Sex differences and geographic variation in body size in the wolf spiders Rabidosa rabida and Rabidosa punctulata (Araneae: Lycosidae). Annual meeting of the Southern California Academy of Sciences.

Moradian, N.R. & S.E. Walker. Relationships between body size and sound producing structures in crickets: Do big males have big harps? Annual meeting of the Southern California Academy of Sciences.

2005

Walker, S.E. & J. A. Roberts. Transitivity and song preferences in the house cricket, Acheta domesticus. Annual Meeting of the Southern California Academy of Sciences.

Buena, L.J. & S.E. Walker. The effect of female chemical cues on the aggressive behavior of male crickets, Acheta domesticus. Annual Meeting of the Southern California Academy of Sciences.

Hoese, W. J. & S. E. Walker. Assessing college students’ understanding of insect diversity. Annual Meeting of the Society of Integrative and Comparative Biology.

2004

Walker, S. E. Examining the relationship between time spent calling and mating success in the field cricket, Teleogryllus oceanicus. Annual Meeting of the Entomological Society of America.

Hoese, W. J. & S. E. Walker. Using image-based assessments to identify misconceptions of insect diversity. Annual Meeting of the Entomological Society of America.

Walker, S. E. Alternative mating tactics in crickets: Are all males equal? Southern California Animal Behavior Conference.

Sisson, R. A., N. R. Moradian, E. Cole, and S. E. Walker. Male morphology and calling song in the field cricket, Gryllus bimaculatus. Annual Meeting of the Southern California Academy of Science .

2003

Walker, S. E., B. J. Kitsch, and W. H. Cade. Are calling song characteristics related to male quality in the field cricket, Gryllus rubens? Animal Behavior Society Annual Meeting.

2002

Walker, S. E. and W. H. Cade. A simulation model of the effects of a parasitoid fly on male mating success and longevity in crickets. Animal Behavior Society Annual Meeting.

Walker, S. E. and W. H. Cade. Alternative male strategies in Crickets: examining the role of parasitoid flies and female phonotaxis. Canadian Society of Zoologists Annual Meeting.

2001

Walker, S. E. Do sex differences in mortality really result in dwarf males? Annual Meeting of the American Arachnological Society.

Walker, S. E. & A. L. Rypstra. Examining the fecundity selection hypothesis in spiders. 21st Annual Midwest Ecology and Evolution Conference.

Jacquot, J. and S. Walker. Rapid population growth of humans and white-tailed deer in Kent Count Michigan: an accident waiting to happen. American Society of Mammalogists Annual Meeting.

2000

Walker, S. E. & A. L. Rypstra. Sexual Dimorphism in Wolf Spiders (Araneae:Lycosidae): Is Foraging Behavior Important ? Joint Meeting of the Society for the Study of Evolution, The American Society of Naturalists, The Society of Systematic Biologists, and The Association of Tropical Biologists.

Walker, S. E. & A. L. Rypstra. A comparative analysis of sexual dimorphism and body size in wolf spiders (Araneae: Lycosidae). Annual Meeting of the American Arachnological Society.

Walker, S. E., M. H. Persons, & A. L. Rypstra. The influence of predation risk on mate choice and courtship behavior in the wolf spider, Pardosa milvina. Annual Meeting of the American Arachnological Society.

Persons, M.H., S. E. Walker, & A. L. Rypstra. Fitness costs and benefits of chemically-mediated antipredator behavior in the wolf spider Pardosa milvina (Araneae: Lycosidae). Annual Meeting of the American Arachnological Society.

Rypstra, A. L., S. E. Walker, & M. H. Persons. Competition as a result of anti-predator behavior in two species of wolf spider. Annual Meeting of the American Arachnological Society.

1999

Walker, S. E. An ecological test of the differential mortality model. The Ohio Spider Web Meeting.

Walker, S.E. & A.L. Rypstra Sex differences in chelicerae and fang size, venom glands, and feeding behavior in Hogna helluo and Pardosa milvina. Annual Meeting of the American Arachnological Society.

Walker, S.E. & A.L. Rypstra Morphometric analysis of sexual dimorphism in wolf spiders. Annual Meeting of the American Arachnological Society.

Walker, S.E. & A.L. Rypstra. Sex differences in locomotor behavior in three species of wolf spider. Animal Behavior Society, Midwest Regional Meeting.

Balfour, R.A., S.E. Walker & A.L. Rypstra Cannibalism as a factor regulating population density in the wolf spider, Pardosa milvina (Araneae, Lycosidae). Annual Meeting of the American Arachnological Society.

Persons, M. H., S.E. Walker, A.L. Rypstra & S. D. Marshall. Chemically mediated predator-prey interactions in the wolf spider Pardosa milvina and Hogna helluo. Annual Meeting of the Animal Behaviour Society.

1998

Walker, S.E., R.A. Balfour, S.D. Marshall & A.L. Rypstra. Differences between males and females: Functional response and wasteful killing in two species of wolf spider (Araneae, Lycosidae). XIV International Arachnological Congress and the 22nd Annual Meeting of the American Arachnological Society .

Walker, S. E., S. D. Marshall & A.L. Rypstra. Evaluating costs of reproduction in the wolf spider Pardosa milvina. Annual Meeting of the Animal Behaviour Society.

Bailer, A.J., K.J. Venis & S.E. Walker. Estimating and testing bioconcentration factors. 19th Annual Meeting of the Society of Environmental Toxicology and Chemistry.

1997

Walker, S.E. & A.L. Rypstra. The influence of short-term foraging success on site investment in the wolf spider, Hogna helluo. Annual Meeting of the American Arachnological Society.

Walker, S.E., M. Thomann & A.L. Rypstra. A preliminary analysis of the effects of feeding history on sexual cannibalism and female receptivity in the wolf spider Hogna helluo. Animal Behavior Society, Midwest Regional Meeting.

Marshall, S.D., S.E. Walkers & A.L. Rypstra. Feeding regime and locomotor activity in two wolf spiders. Annual Meeting of the Animal Behavior Society.

Marshall, S.D., A.L. Rypstra & S. E. Walker. Relative dispersal abilities affect spider establishment in high quality habitat islands. Annual Meeting of the American Arachnological Society.

Marshall, S.D., A.L. Rypstra & S.E. Walker. Evidence for a trade-off of competitive versus colonization ability in two wolf spider taxa. Annual Meeting of the Ecological Society of America.

1996

Walker, S.E. The photoenhanced effects of fluoranthene exposure on bullfrog tadpoles. (Rana catesbeiana) Annual Meeting of the American Society of Ichthyologists and Herpetologists.

Walker, S.E., R.A. Balfour, S.D. Marshall & A.L. Rypstra. Relationships between body size, clutch size, and offspring size in two species of lycosid. Annual Meeting of the American Arachnological Society.

Walker, S.E., D.H. Taylor & J.T. Oris. The Phototoxic effects of Fluoranthene on bullfrog tadpoles. 17th Annual Meeting of the Society of Environmental Toxicology and Chemistry.

Walker, S.E., S.D. Marshall & A.L. Rypstra. The effects of feeding regime on locomotor activity in two species of wolf spider. Animal Behavior Society, Midwest Regional Meeting.

Oris, J.T., J.E. Weinstein, S.E. Walker & J. Choi. Mode of Action of Photoinduced toxicity of PAH in Aquatic Vertebrates. Annual Meeting of the American Society of Testing Materials.

1995

Walker, S.E. & N.B. Ford. Courtship behavior in the brown house snake, Lamprophis fuliginosus. Animal Behavior Society, Midwest Regional Meeting.

Walker, S.E., S.D. Marshall & D.H. Taylor. The effect of feeding levels on locomotor activity in Hogna helluo (Araneae: Lycosidae). Annual Meeting of the American Arachnological Society.

Walker, S.E. & N.B. Ford. Courtship behavior in the brown house snake, Lamprophis fuliginosus. Annual Meeting of the Society for the Study of Amphibians and Reptiles.

1994

Walker, S.E. Factors influencing reproductive traits in the Pueblan milk snake, Lampropeltis triangulum campbelli. Annual Meeting of the Texas Academy of Science.

Walker, S.E. Factors influencing reproductive traits in the Pueblan milk snake, Lampropeltis triangulum campbelli. Biological Society South Central Regional Meeting, Districts 1 and 2.

Nesmith, J.J., N.B. Ford & S.E. Walker. Effect of a clear-cut on the snake fauna in a mixed pine-hardwood forest of northeast Texas. Annual Meeting of the Texas Academy of Science.

1993

Walker, S.E. The Influence of PIT tags on weight gain in two species of snake. Annual meeting of the Texas Academy of Science.

HONORS, SCHOLARSHIPS, AND AWARDS

College of Natural Sciences and Mathematics, California State University Fullerton, Nominated for the CNSM Faculty Award for Outstanding Teaching Spring 2006 & 2007

California Sate University, Fullerton, Outstanding Faculty Service Award (for service to students) Spring 2006

Department of Zoology, Miami University, Doctoral Student Research Award –Spring 2001

Dissertation Scholarship, Department of Zoology, Miami University, Fall 2000 - Spring 2001(This is a competitive award given to students in the last year of their dissertation research)

Graduate Achievement Award, Fall 1998

Second Place, Student Paper Competition, XIV International Arachnological Congress and the 22nd Annual Meeting of the American Arachnological Society 1998.

Member, Sigma Xi, Scientific Research Society, Fall 1995

Member, Alpha Chi, National Honor Society, Fall 1994

Presidents Honor Roll, University of Texas at Tyler, Spring 1994

Texas Academy of Science Best Paper Award at Regional Tri-Beta Meeting, 1994

BBB Biological Honor Society Frank G. Brooks Award for Excellence in Student Research, South Central Region District 2 Convention, 1994

Honorable Mention, Best Paper Competition, Texas Academy of Science, 1993

Outstanding First Year Chemistry Student, University of Texas at Tyler, 1993

Member, BBB Biological Honor Society, Kappa Xi Chapter, 1992-1994

Outstanding Chemistry Student, Tyler Junior College, 1992

Honor Student in Chemistry, Tyler Junior College, 1992

Patriot Scholarship, University of Texas at Tyler, 1992

Honor Student in Biology, Tyler Junior College, 1991 and 1992

PROFESSIONAL & COMMUNITY SERVICE

Reviewer for:

Animal Behaviour, Behavioral Ecology, Bulletin of Environmental Toxicology and Chemistry, Canadian Journal of Zoology, Environmental Toxicology and Chemistry, Ethology, Journal of Arachnology, Journal of Insect Behavior

Member, University Information Technology Committee, California State University, Fullerton. 2006 - Present

Chair, Department of Biological Science Information Technology Committee, California State University, Fullerton 2006 - Present.

Chair, Biodiversity, Ecology, and Conservation Biology concentration. Department of Biological Science, California State University, Fullerton.

Lab Safety and Computer Committees, Department of Biological Science, California State University, Fullerton. These are two ad hoc committees put together in 2003-2004 to examine Lab Safety and Computer issues in the Department.

Co-Chair of Program Committee (with Jon Gering), Oxford Audubon Society

1998-2001. Responsible for obtaining speakers for monthly meetings.

Member at Large, Oxford Audubon Society, 1997-2001

Seminar Committee, Department of Zoology, Miami University 1996-1997.

Obtained funding (~500.00) and organized the annual seminar that is sponsored

by the graduate students.

Graduate Advisory Committee, Department of Zoology, Miami University 1995-1996,

2000-2001 Assisted in the revision of the requirements for entrance to the departments graduate program.

PROFESSIONAL AFFILIATIONS

Animal Behavior Society, 1994 -present

American Arachnological Society, 1996-present

Entomological Society of America, 2003-present

International Society for Behavioral Ecology, 2004-present

American Statistical Association, 2005-present

Southern California Academy of Science 2007-present