Theses and Dissertations


Title: Some aspects of the ecology and life history of the pygmy sculpin, Cottus pygmaeus Williams, a rare spring species of Calhoun County, Alabama (Pisces: Cottidae)

Name: McCaleb, John E.

Degree: MS

Chair: Dr. John S. Ramsey

Resides: FAA Library

University: Auburn

Location: Auburn, Alabama

Date: 1973

Pages: 94

Keywords: Ecology,Life History,Pygmy Sculpin,Cottus pygmaeus Williams,Calhoun County, Alabama.

Abstract:

The seasonal food habits and reproduction of Cottus pygmaeus were studied. Diel feeding was studied at 3-hr intervals over a 24-hr period. Isopods, gastropods, amphipods, ostracods, caddis, and chironomids were important food items. Isopods were the most important food item throughout the year. Monthly food analyses indicated increased consumption of gastropods during winter months, and increased consumption of amphipods during summer months. Smaller sized prey items were most important to smaller individuals of C. pygmaeus. Observations of nests throughout the year demonstrated that C. pygmaeus has an extended spawning season lasting throughout the year. Peak spawning apparently begins in April and probably lasts through August.

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