Theses and Dissertations

Title: Sexual differences in accumulation of polychlorinated biphenyls in six fish species from Lake Logan Martin, Alabama

Name: Rypel, Andrew L.

Degree: MS

Chair: David R. Bayne


University: Auburn University

Location: Auburn, Alabama

Date: 2004

Pages: 69

Keywords: sexual differences, polychlorinated biphenyls, Lake Logan Martin, PCB


Differences in polychlorinated biphenyl (PCB) residues among sexes of fishes are not understood well. A challenge currently facing aquatic ecologists is understanding the dynamics of trophic accumulation and transfer of these pollutants. Sexual differences in PCB residues for a species may explain more than is currently understood about toxic buildup. I analyzed 6 warmwater fish species (total N=955) from a southeastern reservoir for gender differences in PCB bioaccumulation. Using multiple regression and covariate regression analyses I found significant (P<0.05) differences in fillet PCB levels between sexes for channel catfish (Ictalurus punctatus), largemouth bass (Micropterus salmoides) and spotted bass (Micropterus punctulatus). Striped bass (Morone saxatilus), black crappie (Pomoxis nigromaculatus) and freshwater drum (Aplodinotus grunniens) showed no differences between sexes in bioaccumulation of PCBs. These differences may be due to combinations of environmental factors including reproduction, movement and lipid deposition strategies.

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