NPWRC Staff -- Terry Shaffer

Current Projects:

The role of number of species planted in restoration of seeded native grasslands (with Q. Guo)
Monitoring of breeding duck habitat, populations, and productivity in the Prairie Pothole Region
Statistical consulting on a variety of projects including:
- Improved analysis methods for avian nest survival
- Factors affecting songbird nest survival
- Landscape effects on productivity of piping plovers
- Impacts of the Environmental Benefit Index and emergency haying on productivity of upland-nesting ducks in CRP
- Effects of prescribed fire on avian occurrences and avian productivity in mixed-grass prairie of northcentral North Dakota
Density and success of upland duck nests in native- and tame-seeded Conservation Reserve Program lands (with M. Sherfy)

Peak, R. G., F. R. Thompson, III, and T. L. Shaffer. In press. Factors affecting nest success of songbirds in riparian corridors. Auk.

Rotella, J. J., S. J. Dinsmore, and T. L. Shaffer. 2004 (In press). Modeling nest-survival data: a comparison of recently developed methods that can be implemented in MARK and SAS. Animal Biodiversity and Conservation.

Shaffer, T. L. In press. A unified approach to analyzing nest success. Auk.

Mushet, D. M., N. H. Euliss, Jr., and T. L. Shaffer. 2002. Floristic quality assessment of one natural and three restored wetland complexes in North Dakota, USA. Wetlands 22:126-138.

Reynolds, R. E., T. L. Shaffer, R. W. Renner, W. E. Newton, and B. D. J. Batt. 2001. Impact of the Conservation Reserve Program on duck recruitment in the U.S. Prairie Pothole Region. Journal of Wildlife Management 65:765-780.

Johnson, D. H., T. L. Shaffer, and W. E. Newton. 2001. Statistics for wildlifers: how much and what kind? Wildlife Society Bulletin 29:1055-1060.

Shaffer, T. L., and W. E. Newton. 1995. Duck nest success in the prairie potholes. Pages 300-302 in E. T. LaRoe, G. S. Farris, C. E. Puckett, P. D. Doran, and M. J. Mac, eds. Our living resources: a report to the nation on the distribution, abundance, and health of U.S. plants, animals, and ecosystems. National Biological Service, Washington, D.C. 530 p.

Shaffer, T. L., and N. P. Groninger. 1995. Double data entry for novice users. Pages 1111-1116 in Proceedings of the 20th Annual SAS Users Group International Conference. Orlando, FL.

Greenwood, R. J., A. B. Sargeant, D. H. Johnson, L. M. Cowardin, and T. L. Shaffer. 1995. Factors associated with duck nest success in the prairie pothole region of Canada. Wildlife Monographs 128.

Cowardin, L. M., T. L. Shaffer, and P. M. Arnold. 1995. Evaluations of duck habitat and estimation of duck population sizes with a remote-sensing-based system. National Biological Service Biological Science Report 2.

Sargeant, A. B., R. J. Greenwood, M. A. Sovada, and T. L. Shaffer. 1993. Distribution and abundance of predators that affect duck production--prairie pothole region. U.S. Fish and Wildlife Service Resource Publication 194.

Johnson, D. H., T. L. Shaffer, and P. J. Gould. 1993. Incidental catch of marine birds in the north pacific high seas driftnet fisheries in 1990. International North Pacific Fisheries Commission Bulletin 53:473-483.

Johnson, D. H., and T. L. Shaffer. 1990. Estimating nest success: when Mayfield wins. Auk 107:595-600.

Klett, A. T., T. L. Shaffer, and D. H. Johnson. 1988. Duck nest success in the prairie pothole region. Journal of Wildlife Management 52:431-440.

Johnson, D. H., and T. L. Shaffer. 1987. Are mallards declining in North America? Wildlife Society Bulletin 15:340-345.

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Terry L. Shaffer Statistician	USGS Northern Prairie Wildlife Research Center 8711 37th Street Southeast Jamestown, North Dakota 58401 Phone: (701) 253-5522 Fax: (701) 253-5553 Email Terry Shaffer
Research (Principal Investigator), Jamestown Headquarters