Cooperative Research Units
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Effects of environmental variation on timing of spawning and early life-history characteristics of two populations of shoal bass in the upper Chattahoochee River basin

Mike Porta with shoal bass from the Chattahoochee River, Georgia.


July 2009 - December 2011


Since the GA DNR and the NPS began a shoal bass stocking program to restore this fishery to the Chattahoochee River below Morgan Falls Dam in 2003, several studies of varying scales have taken place to better understand the unique population dynamics of this species in this section of the river. However, little has been done to comprehensively understand the factors that will affect the sustainability of shoal bass in its restored state. We are conducting a study to quantify success of the 5-year restoration program and the effects of environmental variation on the timing of spawning and early life history characteristics (age, growth, mortality) of shoal bass in the Chattahoochee River below Morgan Falls Dam and in a tributary (Big Creek).

Research Products and Activities


  • Porta, M.J., J.M. Long, and C.R. Martin. 2010. Length, Age, and Growth of Juvenile Shoal Bass Reintroduced into a Trout Tailwater. Species introductions and reintroductions symposium. American Fisheries Society and The Wildlife Society, Starkville, Mississippi, 8-9 April 2010.
  • Porta, M.J. and J.M. Long. 2013. Evaluation of a Five-Year Shoal Bass Micropterus cataractae Conservation-Stocking Program in the Upper Chattahoochee River, Georgia. Black Bass Diversity Symposium, Southern Division Society American Fisheries Society Annual Meeting, Nashville.

Current Staff

Federal Staff: 95

Masters Students: 238

Phd Students: 144

Post Docs: 54

University Staff: 239

5 Year Summary

Students graduated: 673

Scientific Publications: 1905

Presentations: 4235



  • James LongPrincipal Investigator
  • Mike PortaStudent

Funding Agencies

  • Chattahoochee River National Recreation Area


Cooperative Research Units Program Headquarters Cooperators

  1. U.S. Geological Survey