Research Interests:

Imperiled fish conservation


Fish life history and reproductive ecology


Historical variation in stream fish assemblages


Spatial ecology in dendritic stream networks


Conservation Philosophy:

Dr. Frank Cross once asked “How will the unprecedented loss of species of fishes from the Midwest during the last 40 years affect the lives of Kansans? Will Kansans respond to the loss of water on the high plains and the depletion of subsurface aquifers before their lives are changed immeasurably for the worse? How can scientists and other interested people determine solutions?” The basis of my research relates to determining causal factors for fish species declines in and outside of the Great Plains, with the ultimate goal of developing solutions for water and species loss.


Plains Minnow

(Hybognathus placitus)


Prairie Chub

(Macrhybopsis australis)


Silver Chub

(Macrhybopsis storeriana)


Burrhead Chub

(Macrhybopsis marconsis)


Chub Shiner

(Notropis potteri)


Ironcolor Shiner

(Notropis chalybaeus)


Creek Chub

(Semotilus atromaculatus)


Guadalupe Bass

(Micropterus treculii)



Joshuah S. Perkin, Ph.D.

Research Associate

Division of Biology

Kansas State University

116 Ackert Hall

Manhattan, Kansas 66506


Phone: 785-532-6616




Kansas State University – December 2012

Doctor of Philosophy, Biology: Ecology and Evolutionary Biology

Major Advisor: Dr. Keith B. Gido

Dissertation Title: Fragmentation in stream networks: quantification, consequences, and implications to decline of native fish fauna.


Texas State University-San Marcos – May 2009

Master of Science, Aquatic Resources

Thesis Title: Historical composition and long-term trends of fish assemblages in two Texas rivers and movement and microhabitat associations of Guadalupe bass in the Pedernales and South Llano rivers.


Texas State University-San Marcos – August 2006

Bachelor of Science, Aquatic Biology

Undergraduate Research Title: Status, native distribution, and life history aspects of the chub shiner Notropis potteri.






Perkin, J. S., K. B. Gido, K. H. Costigan, M. D. Daniels, and E. R. Johnson. 2014. Fragmentation and drying ratchet down Great Plains fish diversity. Aquatic Conservation: Marine and Freshwater Ecosystems. In Press.

Perkin, J. S., K. B. Gido, A. R. Cooper, T. F. Turner, M. J. Osborne, E. R. Johnson, and K. B. Mayes. 2014. Fragmentation and dewatering transform Great Plains stream fish communities. Ecological Monographs. In Pess.

Costigan, K. H., M. D. Daniels, J. S. Perkin, and K. B. Gido. 2014. Longitudinal variability in hydraulic geometry and substrate characteristics of a Great Plains sand-bed river. Geomorphology 210:48-58. PDF

Alexander, A. M., and J. S. Perkin. 2013. Notes on the distribution and feeding ecology of a relict population of the cardinal shiner, Luxilus cardinalis (Teleostei: Cyprinidae), in Kansas. Transactions of the Kansas Academy of Science 116:11-21. PDF

Perkin, J. S., Z. R. Shattuck, J. E. Gerken, and T. H. Bonner. 2013. Fragmentation and drought legacy correlate with Burrhead Chub distribution in subtropical streams of North America. Transactions of the American Fisheries Society 142:1287-1298. PDF


Dodds, W. K., J. S. Perkin, and J. E. Gerken. 2013. Human impact on freshwater ecosystem services: a global perspective. Environmental Science and Technology 47:9061-9068. PDF


Perkin, J. S., K. B. Gido, O. Al-Ta'ani, and C. Scoglio. 2013. Simulating fish dispersal in stream networks fragmented by multiple road crossings. Ecological Modelling 257:44-56. PDF


Perkin, J. S., and K. B. Gido. 2012. Fragmentation alters stream fish community structure in dendritic ecological networks. Ecological Applications 22:2176-2187. PDF


Perkin, J. S., Z. R. Shattuck, and T. H. Bonner. 2012. Reproductive ecology of a relict ironcolor shiner (Notropis chalybaeus) population in the headwaters of the San Marcos River, Texas. American Currents 37(2):13-23. PDF


Heard, T. C., J. S. Perkin, and T. H. Bonner. 2012. Intra-annual variation in fish communities and habitat associations in a Chihuahua Desert reach of the Rio Grande/Rio Bravo del Norte. Western North American Naturalist 72:1-15. PDF


Perkin, J. S., Z. R. Shattuck, and T. H. Bonner. 2012. Life history aspects of a relict ironcolor shiner Notropis chalybaeus population in a novel spring environment. American Midland Naturalist 167:111-126. PDF


Perkin, J. S., and K. B. Gido. 2011. Stream fragmentation thresholds for a reproductive guild of Great Plains fishes. Fisheries 36:371-383. PDF


Perkin, J. S., and T. H. Bonner. 2011. Long-term changes in flow regime and fish assemblage composition in the Guadalupe and San Marcos rivers of Texas. River Research and Applications 27:566-579. PDF


Perkin, J. S., Z. R. Shattuck, P. T. Bean, T. H. Bonner, E. Saraeva, and T. B. Hardy. 2010. Movement and microhabitat associations of Guadalupe bass in two Texas Rivers. North American Journal of Fisheries Management 30:31-45. PDF


Perkin, J. S., C. S. Williams, and T. H. Bonner. 2009. Aspects of chub shiner Notropis potteri life history with comments on native distribution and conservation status. American Midland Naturalist 162:279-291. PDF





Current Research Projects:


Mapping and Predicting Groundwater-Mediated Hydrologic Connectivity for Great Plains Prairie Rivers and Streams

Conservation Priorities for Great Plains Fish Communities Based on Riverscape Connectivity and Genetic Integrity of Populations

Historical Changes in Fish Assemblage Composition Following Water Quality Improvement in the Mainstem Trinity River of Texas