University Park, Pa. --- Using a standard statistical method to examine the relationships among geographical range size, body size, habitat breadth and local abundance in North American sunfish and suckers, a Penn State biologist has identified 13 extinction prone species -— and says that there could more.
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Penn State. "Extinction-Prone Sunfish And Suckers Identified." ScienceDaily. ScienceDaily, 17 April 2000. <www.sciencedaily.com/releases/2000/04/000417100159.htm>.
Penn State. (2000, April 17). Extinction-Prone Sunfish And Suckers Identified. ScienceDaily. Retrieved March 11, 2014 from www.sciencedaily.com/releases/2000/04/000417100159.htm
Penn State. "Extinction-Prone Sunfish And Suckers Identified." ScienceDaily. www.sciencedaily.com/releases/2000/04/000417100159.htm (accessed March 11, 2014).